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0
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1 using System;
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2 using System.Collections;
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3 using System.Collections.Generic;
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4 using System.Linq;
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5 using System.Linq.Expressions;
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6 using System.Reflection;
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7 using System.Text;
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8
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9 namespace BLToolkit.Data.Linq.Builder
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10 {
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11 using BLToolkit.Linq;
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12 using Common;
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13 using Data.Sql;
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14 using Mapping;
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15 using Reflection;
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16
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17 partial class ExpressionBuilder
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18 {
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19 #region Build Where
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20
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21 public IBuildContext BuildWhere(IBuildContext parent, IBuildContext sequence, LambdaExpression condition, bool checkForSubQuery)
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22 {
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23 var makeHaving = false;
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24 var prevParent = sequence.Parent;
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25
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26 var ctx = new ExpressionContext(parent, sequence, condition);
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27 var expr = ConvertExpression(condition.Body.Unwrap());
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28
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29 if (checkForSubQuery && CheckSubQueryForWhere(ctx, expr, out makeHaving))
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30 {
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31 ReplaceParent(ctx, prevParent);
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32
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33 sequence = new SubQueryContext(sequence);
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34 prevParent = sequence.Parent;
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35
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36 ctx = new ExpressionContext(parent, sequence, condition);
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37 }
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38
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39 BuildSearchCondition(
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40 ctx,
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41 expr,
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42 makeHaving ?
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43 ctx.SqlQuery.Having.SearchCondition.Conditions :
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44 ctx.SqlQuery.Where. SearchCondition.Conditions);
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45
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46 ReplaceParent(ctx, prevParent);
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47
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48 return sequence;
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49 }
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50
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51 bool CheckSubQueryForWhere(IBuildContext context, Expression expression, out bool makeHaving)
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52 {
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53 var makeSubQuery = false;
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54 var isHaving = false;
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55 var isWhere = false;
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56
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57 expression.Visit(expr =>
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58 {
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59 if (_subQueryExpressions != null && _subQueryExpressions.Contains(expr))
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60 {
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61 makeSubQuery = true;
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62 isWhere = true;
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63 return false;
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64 }
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65
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66 var stopWalking = false;
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67
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68 switch (expr.NodeType)
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69 {
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70 case ExpressionType.MemberAccess:
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71 {
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72 var ma = (MemberExpression)expr;
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73
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74 if (TypeHelper.IsNullableValueMember(ma.Member) ||
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75 TypeHelper.IsNullableHasValueMember(ma.Member))
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76 break;
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77
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78 if (SqlProvider.ConvertMember(ma.Member) == null)
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79 {
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80 var ctx = GetContext(context, expr);
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81
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82 if (ctx != null)
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83 {
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84 if (ctx.IsExpression(expr, 0, RequestFor.Expression).Result)
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85 makeSubQuery = true;
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86 stopWalking = true;
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87 }
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88 }
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89
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90 isWhere = true;
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91
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92 break;
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93 }
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94
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95 case ExpressionType.Call:
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96 {
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97 var e = (MethodCallExpression)expr;
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98
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99 if (e.Method.DeclaringType == typeof(Enumerable) && e.Method.Name != "Contains")
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100 return isHaving = true;
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101
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102 isWhere = true;
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103
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104 break;
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105 }
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106
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107 case ExpressionType.Parameter:
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108 {
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109 var ctx = GetContext(context, expr);
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110
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111 if (ctx != null)
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112 {
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113 if (ctx.IsExpression(expr, 0, RequestFor.Expression).Result)
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114 makeSubQuery = true;
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115 stopWalking = true;
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116 }
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117
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118 isWhere = true;
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119
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120 break;
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121 }
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122 }
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123
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124 return !stopWalking;
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125 });
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126
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127 makeHaving = isHaving && !isWhere;
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128 return makeSubQuery || isHaving && isWhere;
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129 }
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130
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131 #endregion
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132
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133 #region BuildTake
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134
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135 public void BuildTake(IBuildContext context, ISqlExpression expr)
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136 {
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137 var sql = context.SqlQuery;
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138
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139 sql.Select.Take(expr);
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140
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141 SqlProvider.SqlQuery = sql;
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142
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143 if (sql.Select.SkipValue != null && SqlProvider.IsTakeSupported && !SqlProvider.IsSkipSupported)
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144 {
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145 if (context.SqlQuery.Select.SkipValue is SqlParameter && sql.Select.TakeValue is SqlValue)
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146 {
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147 var skip = (SqlParameter)sql.Select.SkipValue;
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148 var parm = (SqlParameter)sql.Select.SkipValue.Clone(new Dictionary<ICloneableElement,ICloneableElement>(), _ => true);
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149
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150 parm.SetTakeConverter((int)((SqlValue)sql.Select.TakeValue).Value);
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151
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152 sql.Select.Take(parm);
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153
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154 var ep = (from pm in CurrentSqlParameters where pm.SqlParameter == skip select pm).First();
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155
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156 ep = new ParameterAccessor
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157 {
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158 Expression = ep.Expression,
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159 Accessor = ep.Accessor,
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160 SqlParameter = parm
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161 };
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162
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163 CurrentSqlParameters.Add(ep);
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164 }
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165 else
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166 sql.Select.Take(Convert(
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167 context,
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168 new SqlBinaryExpression(typeof(int), sql.Select.SkipValue, "+", sql.Select.TakeValue, Precedence.Additive)));
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169 }
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170
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171 if (!SqlProvider.TakeAcceptsParameter)
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172 {
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173 var p = sql.Select.TakeValue as SqlParameter;
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174
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175 if (p != null)
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176 p.IsQueryParameter = false;
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177 }
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178 }
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179
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180 #endregion
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181
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182 #region SubQueryToSql
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183
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184 public IBuildContext GetSubQuery(IBuildContext context, MethodCallExpression expr)
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185 {
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186 var info = new BuildInfo(context, expr, new SqlQuery { ParentSql = context.SqlQuery });
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187 var ctx = BuildSequence(info);
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188
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189 if (ctx.SqlQuery.Select.Columns.Count == 0 &&
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190 (ctx.IsExpression(null, 0, RequestFor.Expression).Result ||
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191 ctx.IsExpression(null, 0, RequestFor.Field). Result))
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192 {
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193 ctx.ConvertToIndex(null, 0, ConvertFlags.Field);
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194 }
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195
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196 return ctx;
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197 }
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198
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199 internal ISqlExpression SubQueryToSql(IBuildContext context, MethodCallExpression expression)
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200 {
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201 var sequence = GetSubQuery(context, expression);
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202 var subSql = sequence.GetSubQuery(context);
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203
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204 if (subSql != null)
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205 return subSql;
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206
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207 var query = context.SqlQuery;
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208 var subQuery = sequence.SqlQuery;
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209
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210 // This code should be moved to context.
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211 //
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212 if (!query.GroupBy.IsEmpty && !subQuery.Where.IsEmpty)
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213 {
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214 var fromGroupBy = sequence.SqlQuery.Properties
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215 .OfType<System.Tuple<string,SqlQuery>>()
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216 .Where(p => p.Item1 == "from_group_by" && p.Item2 == context.SqlQuery)
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217 .Any();
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218
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219 if (fromGroupBy)
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220 {
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221 if (subQuery.Select.Columns.Count == 1 &&
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222 subQuery.Select.Columns[0].Expression.ElementType == QueryElementType.SqlFunction &&
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223 subQuery.GroupBy.IsEmpty && !subQuery.Select.HasModifier && !subQuery.HasUnion &&
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224 subQuery.Where.SearchCondition.Conditions.Count == 1)
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225 {
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226 var cond = subQuery.Where.SearchCondition.Conditions[0];
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227
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228 if (cond.Predicate.ElementType == QueryElementType.ExprExprPredicate && query.GroupBy.Items.Count == 1 ||
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229 cond.Predicate.ElementType == QueryElementType.SearchCondition &&
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230 query.GroupBy.Items.Count == ((SqlQuery.SearchCondition)cond.Predicate).Conditions.Count)
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231 {
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232 var func = (SqlFunction)subQuery.Select.Columns[0].Expression;
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233
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234 if (CountBuilder.MethodNames.Contains(func.Name))
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235 return SqlFunction.CreateCount(func.SystemType, query);
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236 }
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237 }
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238 }
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239 }
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240
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241 return sequence.SqlQuery;
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242 }
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243
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244 #endregion
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245
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246 #region IsSubQuery
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247
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248 bool IsSubQuery(IBuildContext context, MethodCallExpression call)
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249 {
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250 if (call.IsQueryable())
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251 {
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252 var info = new BuildInfo(context, call, new SqlQuery { ParentSql = context.SqlQuery });
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253
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254 if (!IsSequence(info))
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255 return false;
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256
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257 var arg = call.Arguments[0];
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258
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259 if (AggregationBuilder.MethodNames.Contains(call.Method.Name))
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260 while (arg.NodeType == ExpressionType.Call && ((MethodCallExpression) arg).Method.Name == "Select")
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261 arg = ((MethodCallExpression)arg).Arguments[0];
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262
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263 var mc = arg as MethodCallExpression;
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264
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265 while (mc != null)
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266 {
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267 if (!mc.IsQueryable())
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268 return GetTableFunctionAttribute(mc.Method) != null;
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269
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270 mc = mc.Arguments[0] as MethodCallExpression;
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271 }
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272
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273 return arg.NodeType == ExpressionType.Call || IsSubQuerySource(context, arg);
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274 }
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275
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276 return false;
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277 }
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278
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279 bool IsSubQuerySource(IBuildContext context, Expression expr)
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280 {
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281 if (expr == null)
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282 return false;
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283
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284 var ctx = GetContext(context, expr);
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285
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286 if (ctx != null && ctx.IsExpression(expr, 0, RequestFor.Object).Result)
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287 return true;
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288
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289 while (expr != null && expr.NodeType == ExpressionType.MemberAccess)
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290 expr = ((MemberExpression)expr).Expression;
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291
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292 return expr != null && expr.NodeType == ExpressionType.Constant;
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293 }
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294
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295 bool IsGroupJoinSource(IBuildContext context, MethodCallExpression call)
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296 {
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297 if (!call.IsQueryable() || CountBuilder.MethodNames.Contains(call.Method.Name))
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298 return false;
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299
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300 Expression expr = call;
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301
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302 while (expr.NodeType == ExpressionType.Call)
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303 expr = ((MethodCallExpression)expr).Arguments[0];
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304
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305 var ctx = GetContext(context, expr);
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306
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307 return ctx != null && ctx.IsExpression(expr, 0, RequestFor.GroupJoin).Result;
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308 }
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309
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310 #endregion
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311
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312 #region ConvertExpression
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313
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314 interface IConvertHelper
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315 {
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316 Expression ConvertNull(MemberExpression expression);
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317 }
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318
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319 class ConvertHelper<T> : IConvertHelper
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320 where T : struct
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321 {
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322 public Expression ConvertNull(MemberExpression expression)
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323 {
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324 return Expression.Call(
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325 null,
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326 ReflectionHelper.Expressor<T?>.MethodExpressor(p => Sql.ConvertNullable(p)),
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327 expression.Expression);
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328 }
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329 }
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330
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331 Expression ConvertExpression(Expression expression)
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332 {
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333 return expression.Convert2(e =>
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334 {
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335 if (CanBeConstant(e) || CanBeCompiled(e))
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336 return new ExpressionHelper.ConvertInfo(e, true);
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337
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338 switch (e.NodeType)
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339 {
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340 case ExpressionType.New:
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341 {
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342 var ex = ConvertNew((NewExpression)e);
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343 if (ex != null)
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344 return new ExpressionHelper.ConvertInfo(ConvertExpression(ex));
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345 break;
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346 }
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347
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348 case ExpressionType.Call:
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349 {
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350 var cm = ConvertMethod((MethodCallExpression)e);
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351 if (cm != null)
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352 return new ExpressionHelper.ConvertInfo(ConvertExpression(cm));
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353 break;
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354 }
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355
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356 case ExpressionType.MemberAccess:
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357 {
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358 var ma = (MemberExpression)e;
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359 var l = SqlProvider.ConvertMember(ma.Member);
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360
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361 if (l != null)
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362 {
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363 var body = l.Body.Unwrap();
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364 var expr = body.Convert(wpi => wpi.NodeType == ExpressionType.Parameter ? ma.Expression : wpi);
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365
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366 if (expr.Type != e.Type)
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367 expr = new ChangeTypeExpression(expr, e.Type);
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368
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369 return new ExpressionHelper.ConvertInfo(ConvertExpression(expr));
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370 }
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371
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372 if (TypeHelper.IsNullableValueMember(ma.Member))
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373 {
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374 var ntype = typeof(ConvertHelper<>).MakeGenericType(ma.Type);
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375 var helper = (IConvertHelper)Activator.CreateInstance(ntype);
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376 var expr = helper.ConvertNull(ma);
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377
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378 return new ExpressionHelper.ConvertInfo(ConvertExpression(expr));
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379 }
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380
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381 if (ma.Member.DeclaringType == typeof(TimeSpan))
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382 {
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383 switch (ma.Expression.NodeType)
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384 {
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385 case ExpressionType.Subtract :
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386 case ExpressionType.SubtractChecked:
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387
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388 Sql.DateParts datePart;
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389
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390 switch (ma.Member.Name)
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391 {
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392 case "TotalMilliseconds" : datePart = Sql.DateParts.Millisecond; break;
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393 case "TotalSeconds" : datePart = Sql.DateParts.Second; break;
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394 case "TotalMinutes" : datePart = Sql.DateParts.Minute; break;
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395 case "TotalHours" : datePart = Sql.DateParts.Hour; break;
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396 case "TotalDays" : datePart = Sql.DateParts.Day; break;
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397 default : return new ExpressionHelper.ConvertInfo(e);
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398 }
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399
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400 var ex = (BinaryExpression)ma.Expression;
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401 var method = ReflectionHelper.Expressor<object>.MethodExpressor(
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402 _ => Sql.DateDiff(Sql.DateParts.Day, DateTime.MinValue, DateTime.MinValue));
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403
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404 var call =
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405 Expression.Convert(
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406 Expression.Call(
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407 null,
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408 method,
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409 Expression.Constant(datePart),
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410 Expression.Convert(ex.Right, typeof(DateTime?)),
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411 Expression.Convert(ex.Left, typeof(DateTime?))),
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412 typeof(double));
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413
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414 return new ExpressionHelper.ConvertInfo(ConvertExpression(call));
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415 }
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416 }
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417
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418 break;
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419 }
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420 }
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421
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422 return new ExpressionHelper.ConvertInfo(e);
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423 });
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424 }
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425
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426 Expression ConvertMethod(MethodCallExpression pi)
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427 {
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3
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428 var l = SqlProvider.ConvertMember(ReflectionHelper.ExtractMethodInfo(pi));
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0
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429 return l == null ? null : ConvertMethod(pi, l);
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430 }
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431
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432 static Expression ConvertMethod(MethodCallExpression pi, LambdaExpression lambda)
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433 {
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434 var ef = lambda.Body.Unwrap();
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435 var parms = new Dictionary<string,int>(lambda.Parameters.Count);
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436 var pn = pi.Method.IsStatic ? 0 : -1;
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437
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438 foreach (var p in lambda.Parameters)
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439 parms.Add(p.Name, pn++);
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440
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441 var pie = ef.Convert(wpi =>
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442 {
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443 if (wpi.NodeType == ExpressionType.Parameter)
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444 {
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445 int n;
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446 if (parms.TryGetValue(((ParameterExpression)wpi).Name, out n))
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447 return n < 0 ? pi.Object : pi.Arguments[n];
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448 }
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449
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450 return wpi;
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|
451 });
|
|
|
452
|
|
|
453 if (pi.Method.ReturnType != pie.Type)
|
|
|
454 pie = new ChangeTypeExpression(pie, pi.Method.ReturnType);
|
|
|
455
|
|
|
456 return pie;
|
|
|
457 }
|
|
|
458
|
|
|
459 Expression ConvertNew(NewExpression pi)
|
|
|
460 {
|
|
|
461 var lambda = SqlProvider.ConvertMember(pi.Constructor);
|
|
|
462
|
|
|
463 if (lambda != null)
|
|
|
464 {
|
|
|
465 var ef = lambda.Body.Unwrap();
|
|
|
466 var parms = new Dictionary<string,int>(lambda.Parameters.Count);
|
|
|
467 var pn = 0;
|
|
|
468
|
|
|
469 foreach (var p in lambda.Parameters)
|
|
|
470 parms.Add(p.Name, pn++);
|
|
|
471
|
|
|
472 return ef.Convert(wpi =>
|
|
|
473 {
|
|
|
474 if (wpi.NodeType == ExpressionType.Parameter)
|
|
|
475 {
|
|
|
476 var pe = (ParameterExpression)wpi;
|
|
|
477 var n = parms[pe.Name];
|
|
|
478 return pi.Arguments[n];
|
|
|
479 }
|
|
|
480
|
|
|
481 return wpi;
|
|
|
482 });
|
|
|
483 }
|
|
|
484
|
|
|
485 return null;
|
|
|
486 }
|
|
|
487
|
|
|
488 #endregion
|
|
|
489
|
|
|
490 #region BuildExpression
|
|
|
491
|
|
|
492 public SqlInfo[] ConvertExpressions(IBuildContext context, Expression expression, ConvertFlags queryConvertFlag)
|
|
|
493 {
|
|
|
494 expression = ConvertExpression(expression);
|
|
|
495
|
|
|
496 switch (expression.NodeType)
|
|
|
497 {
|
|
|
498 case ExpressionType.New :
|
|
|
499 {
|
|
|
500 var expr = (NewExpression)expression;
|
|
|
501
|
|
|
502 // ReSharper disable ConditionIsAlwaysTrueOrFalse
|
|
|
503 // ReSharper disable HeuristicUnreachableCode
|
|
|
504 if (expr.Members == null)
|
|
|
505 return Array<SqlInfo>.Empty;
|
|
|
506 // ReSharper restore HeuristicUnreachableCode
|
|
|
507 // ReSharper restore ConditionIsAlwaysTrueOrFalse
|
|
|
508
|
|
|
509 return expr.Arguments
|
|
|
510 .Select((arg,i) =>
|
|
|
511 {
|
|
|
512 var mi = expr.Members[i];
|
|
|
513 if (mi is MethodInfo)
|
|
|
514 mi = TypeHelper.GetPropertyByMethod((MethodInfo)mi);
|
|
|
515
|
|
|
516 return ConvertExpressions(context, arg, queryConvertFlag).Select(si => si.Clone(mi));
|
|
|
517 })
|
|
|
518 .SelectMany(si => si)
|
|
|
519 .ToArray();
|
|
|
520 }
|
|
|
521
|
|
|
522 case ExpressionType.MemberInit :
|
|
|
523 {
|
|
|
524 var expr = (MemberInitExpression)expression;
|
|
|
525 var dic = TypeAccessor.GetAccessor(expr.Type)
|
|
|
526 .Select((m,i) => new { m, i })
|
|
|
527 .ToDictionary(_ => _.m.MemberInfo, _ => _.i);
|
|
|
528
|
|
|
529 return expr.Bindings
|
|
|
530 .Where (b => b is MemberAssignment)
|
|
|
531 .Cast<MemberAssignment>()
|
|
|
532 .OrderBy(b => dic[b.Member])
|
|
|
533 .Select (a =>
|
|
|
534 {
|
|
|
535 var mi = a.Member;
|
|
|
536 if (mi is MethodInfo)
|
|
|
537 mi = TypeHelper.GetPropertyByMethod((MethodInfo)mi);
|
|
|
538
|
|
|
539 return ConvertExpressions(context, a.Expression, queryConvertFlag).Select(si => si.Clone(mi));
|
|
|
540 })
|
|
|
541 .SelectMany(si => si)
|
|
|
542 .ToArray();
|
|
|
543 }
|
|
|
544 }
|
|
|
545
|
|
|
546 var ctx = GetContext(context, expression);
|
|
|
547
|
|
|
548 if (ctx != null && ctx.IsExpression(expression, 0, RequestFor.Object).Result)
|
|
|
549 return ctx.ConvertToSql(expression, 0, queryConvertFlag);
|
|
|
550
|
|
|
551 return new[] { new SqlInfo { Sql = ConvertToSql(context, expression, false) } };
|
|
|
552 }
|
|
|
553
|
|
|
554 public ISqlExpression ConvertToSqlExpression(IBuildContext context, Expression expression, bool convertEnum)
|
|
|
555 {
|
|
|
556 var expr = ConvertExpression(expression);
|
|
|
557 return ConvertToSql(context, expr, false, convertEnum);
|
|
|
558 }
|
|
|
559
|
|
|
560 #if FW3
|
|
|
561 public ISqlExpression ConvertToSql(IBuildContext context, Expression expression, bool unwrap)
|
|
|
562 {
|
|
|
563 return ConvertToSql(context, expression, unwrap, true);
|
|
|
564 }
|
|
|
565 #endif
|
|
|
566
|
|
|
567 public ISqlExpression ConvertToSql(IBuildContext context, Expression expression, bool unwrap, bool convertEnum
|
|
|
568 #if !FW3
|
|
|
569 = true
|
|
|
570 #endif
|
|
|
571 )
|
|
|
572 {
|
|
|
573 if (CanBeConstant(expression))
|
|
|
574 return BuildConstant(expression, convertEnum);
|
|
|
575
|
|
|
576 if (CanBeCompiled(expression))
|
|
|
577 return BuildParameter(expression).SqlParameter;
|
|
|
578
|
|
|
579 if (unwrap)
|
|
|
580 expression = expression.Unwrap();
|
|
|
581
|
|
|
582 switch (expression.NodeType)
|
|
|
583 {
|
|
|
584 case ExpressionType.AndAlso :
|
|
|
585 case ExpressionType.OrElse :
|
|
|
586 case ExpressionType.Not :
|
|
|
587 case ExpressionType.Equal :
|
|
|
588 case ExpressionType.NotEqual :
|
|
|
589 case ExpressionType.GreaterThan :
|
|
|
590 case ExpressionType.GreaterThanOrEqual :
|
|
|
591 case ExpressionType.LessThan :
|
|
|
592 case ExpressionType.LessThanOrEqual :
|
|
|
593 {
|
|
|
594 var condition = new SqlQuery.SearchCondition();
|
|
|
595 BuildSearchCondition(context, expression, condition.Conditions);
|
|
|
596 return condition;
|
|
|
597 }
|
|
|
598
|
|
|
599 case ExpressionType.And :
|
|
|
600 case ExpressionType.Or :
|
|
|
601 {
|
|
|
602 if (expression.Type == typeof(bool))
|
|
|
603 goto case ExpressionType.AndAlso;
|
|
|
604 goto case ExpressionType.Add;
|
|
|
605 }
|
|
|
606
|
|
|
607 case ExpressionType.Add :
|
|
|
608 case ExpressionType.AddChecked :
|
|
|
609 case ExpressionType.Divide :
|
|
|
610 case ExpressionType.ExclusiveOr :
|
|
|
611 case ExpressionType.Modulo :
|
|
|
612 case ExpressionType.Multiply :
|
|
|
613 case ExpressionType.MultiplyChecked :
|
|
|
614 case ExpressionType.Power :
|
|
|
615 case ExpressionType.Subtract :
|
|
|
616 case ExpressionType.SubtractChecked :
|
|
|
617 case ExpressionType.Coalesce :
|
|
|
618 {
|
|
|
619 var e = (BinaryExpression)expression;
|
|
|
620 var l = ConvertToSql(context, e.Left, false);
|
|
|
621 var r = ConvertToSql(context, e.Right, false);
|
|
|
622 var t = e.Type;
|
|
|
623
|
|
|
624 switch (expression.NodeType)
|
|
|
625 {
|
|
|
626 case ExpressionType.Add :
|
|
|
627 case ExpressionType.AddChecked : return Convert(context, new SqlBinaryExpression(t, l, "+", r, Precedence.Additive));
|
|
|
628 case ExpressionType.And : return Convert(context, new SqlBinaryExpression(t, l, "&", r, Precedence.Bitwise));
|
|
|
629 case ExpressionType.Divide : return Convert(context, new SqlBinaryExpression(t, l, "/", r, Precedence.Multiplicative));
|
|
|
630 case ExpressionType.ExclusiveOr : return Convert(context, new SqlBinaryExpression(t, l, "^", r, Precedence.Bitwise));
|
|
|
631 case ExpressionType.Modulo : return Convert(context, new SqlBinaryExpression(t, l, "%", r, Precedence.Multiplicative));
|
|
|
632 case ExpressionType.Multiply:
|
|
|
633 case ExpressionType.MultiplyChecked : return Convert(context, new SqlBinaryExpression(t, l, "*", r, Precedence.Multiplicative));
|
|
|
634 case ExpressionType.Or : return Convert(context, new SqlBinaryExpression(t, l, "|", r, Precedence.Bitwise));
|
|
|
635 case ExpressionType.Power : return Convert(context, new SqlFunction(t, "Power", l, r));
|
|
|
636 case ExpressionType.Subtract :
|
|
|
637 case ExpressionType.SubtractChecked : return Convert(context, new SqlBinaryExpression(t, l, "-", r, Precedence.Subtraction));
|
|
|
638 case ExpressionType.Coalesce :
|
|
|
639 {
|
|
|
640 if (r is SqlFunction)
|
|
|
641 {
|
|
|
642 var c = (SqlFunction)r;
|
|
|
643
|
|
|
644 if (c.Name == "Coalesce")
|
|
|
645 {
|
|
|
646 var parms = new ISqlExpression[c.Parameters.Length + 1];
|
|
|
647
|
|
|
648 parms[0] = l;
|
|
|
649 c.Parameters.CopyTo(parms, 1);
|
|
|
650
|
|
|
651 return Convert(context, new SqlFunction(t, "Coalesce", parms));
|
|
|
652 }
|
|
|
653 }
|
|
|
654
|
|
|
655 return Convert(context, new SqlFunction(t, "Coalesce", l, r));
|
|
|
656 }
|
|
|
657 }
|
|
|
658
|
|
|
659 break;
|
|
|
660 }
|
|
|
661
|
|
|
662 case ExpressionType.UnaryPlus :
|
|
|
663 case ExpressionType.Negate :
|
|
|
664 case ExpressionType.NegateChecked :
|
|
|
665 {
|
|
|
666 var e = (UnaryExpression)expression;
|
|
|
667 var o = ConvertToSql(context, e.Operand, false);
|
|
|
668 var t = e.Type;
|
|
|
669
|
|
|
670 switch (expression.NodeType)
|
|
|
671 {
|
|
|
672 case ExpressionType.UnaryPlus : return o;
|
|
|
673 case ExpressionType.Negate :
|
|
|
674 case ExpressionType.NegateChecked :
|
|
|
675 return Convert(context, new SqlBinaryExpression(t, new SqlValue(-1), "*", o, Precedence.Multiplicative));
|
|
|
676 }
|
|
|
677
|
|
|
678 break;
|
|
|
679 }
|
|
|
680
|
|
|
681 case ExpressionType.Convert :
|
|
|
682 case ExpressionType.ConvertChecked :
|
|
|
683 {
|
|
|
684 var e = (UnaryExpression)expression;
|
|
|
685 var o = ConvertToSql(context, e.Operand, false);
|
|
|
686
|
|
|
687 if (e.Method == null && e.IsLifted)
|
|
|
688 return o;
|
|
|
689
|
|
|
690 var t = e.Operand.Type;
|
|
|
691 var s = SqlDataType.GetDataType(t);
|
|
|
692
|
|
|
693 if (o.SystemType != null && s.Type == typeof(object))
|
|
|
694 {
|
|
|
695 t = o.SystemType;
|
|
|
696 s = SqlDataType.GetDataType(t);
|
|
|
697 }
|
|
|
698
|
|
|
699 if (e.Type == t ||
|
|
|
700 t.IsEnum && Enum.GetUnderlyingType(t) == e.Type ||
|
|
|
701 e.Type.IsEnum && Enum.GetUnderlyingType(e.Type) == t)
|
|
|
702 return o;
|
|
|
703
|
|
|
704 return Convert(
|
|
|
705 context,
|
|
|
706 new SqlFunction(e.Type, "$Convert$", SqlDataType.GetDataType(e.Type), s, o));
|
|
|
707 }
|
|
|
708
|
|
|
709 case ExpressionType.Conditional :
|
|
|
710 {
|
|
|
711 var e = (ConditionalExpression)expression;
|
|
|
712 var s = ConvertToSql(context, e.Test, false);
|
|
|
713 var t = ConvertToSql(context, e.IfTrue, false);
|
|
|
714 var f = ConvertToSql(context, e.IfFalse, false);
|
|
|
715
|
|
|
716 if (f is SqlFunction)
|
|
|
717 {
|
|
|
718 var c = (SqlFunction)f;
|
|
|
719
|
|
|
720 if (c.Name == "CASE")
|
|
|
721 {
|
|
|
722 var parms = new ISqlExpression[c.Parameters.Length + 2];
|
|
|
723
|
|
|
724 parms[0] = s;
|
|
|
725 parms[1] = t;
|
|
|
726 c.Parameters.CopyTo(parms, 2);
|
|
|
727
|
|
|
728 return Convert(context, new SqlFunction(e.Type, "CASE", parms));
|
|
|
729 }
|
|
|
730 }
|
|
|
731
|
|
|
732 return Convert(context, new SqlFunction(e.Type, "CASE", s, t, f));
|
|
|
733 }
|
|
|
734
|
|
|
735 case ExpressionType.MemberAccess :
|
|
|
736 {
|
|
|
737 var ma = (MemberExpression)expression;
|
|
|
738 var attr = GetFunctionAttribute(ma.Member);
|
|
|
739
|
|
|
740 if (attr != null)
|
|
|
741 return Convert(context, attr.GetExpression(ma.Member));
|
|
|
742
|
|
|
743 var ctx = GetContext(context, expression);
|
|
|
744
|
|
|
745 if (ctx != null)
|
|
|
746 {
|
|
|
747 var sql = ctx.ConvertToSql(expression, 0, ConvertFlags.Field);
|
|
|
748
|
|
|
749 switch (sql.Length)
|
|
|
750 {
|
|
|
751 case 0 : break;
|
|
|
752 case 1 : return sql[0].Sql;
|
|
|
753 default : throw new InvalidOperationException();
|
|
|
754 }
|
|
|
755 }
|
|
|
756
|
|
|
757 break;
|
|
|
758 }
|
|
|
759
|
|
|
760 case ExpressionType.Parameter :
|
|
|
761 {
|
|
|
762 var ctx = GetContext(context, expression);
|
|
|
763
|
|
|
764 if (ctx != null)
|
|
|
765 {
|
|
|
766 var sql = ctx.ConvertToSql(expression, 0, ConvertFlags.Field);
|
|
|
767
|
|
|
768 switch (sql.Length)
|
|
|
769 {
|
|
|
770 case 0 : break;
|
|
|
771 case 1 : return sql[0].Sql;
|
|
|
772 default : throw new InvalidOperationException();
|
|
|
773 }
|
|
|
774 }
|
|
|
775
|
|
|
776 break;
|
|
|
777 }
|
|
|
778
|
|
|
779 case ExpressionType.Call :
|
|
|
780 {
|
|
|
781 var e = (MethodCallExpression)expression;
|
|
|
782
|
|
|
783 if (e.IsQueryable())
|
|
|
784 {
|
|
|
785 if (IsSubQuery(context, e))
|
|
|
786 return SubQueryToSql(context, e);
|
|
|
787
|
|
|
788 if (CountBuilder.MethodNames.Concat(AggregationBuilder.MethodNames).Contains(e.Method.Name))
|
|
|
789 {
|
|
|
790 var ctx = GetContext(context, expression);
|
|
|
791
|
|
|
792 if (ctx != null)
|
|
|
793 {
|
|
|
794 var sql = ctx.ConvertToSql(expression, 0, ConvertFlags.Field);
|
|
|
795
|
|
|
796 if (sql.Length != 1)
|
|
|
797 throw new InvalidOperationException();
|
|
|
798
|
|
|
799 return sql[0].Sql;
|
|
|
800 }
|
|
|
801
|
|
|
802 break;
|
|
|
803 }
|
|
|
804
|
|
|
805 return SubQueryToSql(context, e);
|
|
|
806 }
|
|
|
807
|
|
|
808 var attr = GetFunctionAttribute(e.Method);
|
|
|
809
|
|
|
810 if (attr != null)
|
|
|
811 {
|
|
|
812 var parms = new List<ISqlExpression>();
|
|
|
813
|
|
|
814 if (e.Object != null)
|
|
|
815 parms.Add(ConvertToSql(context, e.Object, false));
|
|
|
816
|
|
|
817 parms.AddRange(e.Arguments.Select(t => ConvertToSql(context, t, false)));
|
|
|
818
|
|
|
819 return Convert(context, attr.GetExpression(e.Method, parms.ToArray()));
|
|
|
820 }
|
|
|
821
|
|
|
822 break;
|
|
|
823 }
|
|
|
824
|
|
|
825 case ExpressionType.Invoke :
|
|
|
826 {
|
|
|
827 var pi = (InvocationExpression)expression;
|
|
|
828 var ex = pi.Expression;
|
|
|
829
|
|
|
830 if (ex.NodeType == ExpressionType.Quote)
|
|
|
831 ex = ((UnaryExpression)ex).Operand;
|
|
|
832
|
|
|
833 if (ex.NodeType == ExpressionType.Lambda)
|
|
|
834 {
|
|
|
835 var l = (LambdaExpression)ex;
|
|
|
836 var dic = new Dictionary<Expression,Expression>();
|
|
|
837
|
|
|
838 for (var i = 0; i < l.Parameters.Count; i++)
|
|
|
839 dic.Add(l.Parameters[i], pi.Arguments[i]);
|
|
|
840
|
|
|
841 var pie = l.Body.Convert(wpi =>
|
|
|
842 {
|
|
|
843 Expression ppi;
|
|
|
844 return dic.TryGetValue(wpi, out ppi) ? ppi : wpi;
|
|
|
845 });
|
|
|
846
|
|
|
847 return ConvertToSql(context, pie, false);
|
|
|
848 }
|
|
|
849
|
|
|
850 break;
|
|
|
851 }
|
|
|
852
|
|
|
853 case ExpressionType.TypeIs :
|
|
|
854 {
|
|
|
855 var condition = new SqlQuery.SearchCondition();
|
|
|
856 BuildSearchCondition(context, expression, condition.Conditions);
|
|
|
857 return condition;
|
|
|
858 }
|
|
|
859
|
|
|
860 case (ExpressionType)ChangeTypeExpression.ChangeTypeType :
|
|
|
861 return ConvertToSql(context, ((ChangeTypeExpression)expression).Expression, false);
|
|
|
862 }
|
|
|
863
|
|
|
864 if (expression.Type == typeof(bool) && _convertedPredicates.Add(expression))
|
|
|
865 {
|
|
|
866 var predicate = ConvertPredicate(context, expression);
|
|
|
867 _convertedPredicates.Remove(expression);
|
|
|
868 if (predicate != null)
|
|
|
869 return new SqlQuery.SearchCondition(new SqlQuery.Condition(false, predicate));
|
|
|
870 }
|
|
|
871
|
|
|
872 throw new LinqException("'{0}' cannot be converted to SQL.", expression);
|
|
|
873 }
|
|
|
874
|
|
|
875 readonly HashSet<Expression> _convertedPredicates = new HashSet<Expression>();
|
|
|
876
|
|
|
877 #endregion
|
|
|
878
|
|
|
879 #region IsServerSideOnly
|
|
|
880
|
|
|
881 bool IsServerSideOnly(Expression expr)
|
|
|
882 {
|
|
|
883 switch (expr.NodeType)
|
|
|
884 {
|
|
|
885 case ExpressionType.MemberAccess:
|
|
|
886 {
|
|
|
887 var ex = (MemberExpression)expr;
|
|
|
888 var l = SqlProvider.ConvertMember(ex.Member);
|
|
|
889
|
|
|
890 if (l != null)
|
|
|
891 return IsServerSideOnly(l.Body.Unwrap());
|
|
|
892
|
|
|
893 var attr = GetFunctionAttribute(ex.Member);
|
|
|
894 return attr != null && attr.ServerSideOnly;
|
|
|
895 }
|
|
|
896
|
|
|
897 case ExpressionType.Call:
|
|
|
898 {
|
|
|
899 var e = (MethodCallExpression)expr;
|
|
|
900
|
|
|
901 if (e.Method.DeclaringType == typeof(Enumerable))
|
|
|
902 {
|
|
|
903 if (CountBuilder.MethodNames.Concat(AggregationBuilder.MethodNames).Contains(e.Method.Name))
|
|
|
904 return IsQueryMember(e.Arguments[0]);
|
|
|
905 }
|
|
|
906 else if (e.Method.DeclaringType == typeof(Queryable))
|
|
|
907 {
|
|
|
908 switch (e.Method.Name)
|
|
|
909 {
|
|
|
910 case "Any" :
|
|
|
911 case "All" :
|
|
|
912 case "Contains" : return true;
|
|
|
913 }
|
|
|
914 }
|
|
|
915 else
|
|
|
916 {
|
|
3
|
917 var l = SqlProvider.ConvertMember(ReflectionHelper.ExtractMethodInfo(e));
|
|
0
|
918
|
|
|
919 if (l != null)
|
|
|
920 return l.Body.Unwrap().Find(IsServerSideOnly) != null;
|
|
|
921
|
|
|
922 var attr = GetFunctionAttribute(e.Method);
|
|
|
923 return attr != null && attr.ServerSideOnly;
|
|
|
924 }
|
|
|
925
|
|
|
926 break;
|
|
|
927 }
|
|
|
928 }
|
|
|
929
|
|
|
930 return false;
|
|
|
931 }
|
|
|
932
|
|
|
933 static bool IsQueryMember(Expression expr)
|
|
|
934 {
|
|
|
935 if (expr != null) switch (expr.NodeType)
|
|
|
936 {
|
|
|
937 case ExpressionType.Parameter : return true;
|
|
|
938 case ExpressionType.MemberAccess : return IsQueryMember(((MemberExpression)expr).Expression);
|
|
|
939 case ExpressionType.Call :
|
|
|
940 {
|
|
|
941 var call = (MethodCallExpression)expr;
|
|
|
942
|
|
|
943 if (call.Method.DeclaringType == typeof(Queryable))
|
|
|
944 return true;
|
|
|
945
|
|
|
946 if (call.Method.DeclaringType == typeof(Enumerable) && call.Arguments.Count > 0)
|
|
|
947 return IsQueryMember(call.Arguments[0]);
|
|
|
948
|
|
|
949 return IsQueryMember(call.Object);
|
|
|
950 }
|
|
|
951 }
|
|
|
952
|
|
|
953 return false;
|
|
|
954 }
|
|
|
955
|
|
|
956 #endregion
|
|
|
957
|
|
|
958 #region CanBeConstant
|
|
|
959
|
|
|
960 bool CanBeConstant(Expression expr)
|
|
|
961 {
|
|
|
962 return null == expr.Find(ex =>
|
|
|
963 {
|
|
|
964 if (ex is BinaryExpression || ex is UnaryExpression /*|| ex.NodeType == ExpressionType.Convert*/)
|
|
|
965 return false;
|
|
|
966
|
|
|
967 switch (ex.NodeType)
|
|
|
968 {
|
|
|
969 case ExpressionType.Constant :
|
|
|
970 {
|
|
|
971 var c = (ConstantExpression)ex;
|
|
|
972
|
|
|
973 if (c.Value == null || ExpressionHelper.IsConstant(ex.Type))
|
|
|
974 return false;
|
|
|
975
|
|
|
976 break;
|
|
|
977 }
|
|
|
978
|
|
|
979 case ExpressionType.MemberAccess :
|
|
|
980 {
|
|
|
981 var ma = (MemberExpression)ex;
|
|
|
982
|
|
|
983 if (ExpressionHelper.IsConstant(ma.Member.DeclaringType) || TypeHelper.IsNullableValueMember(ma.Member))
|
|
|
984 return false;
|
|
|
985
|
|
|
986 break;
|
|
|
987 }
|
|
|
988
|
|
|
989 case ExpressionType.Call :
|
|
|
990 {
|
|
|
991 var mc = (MethodCallExpression)ex;
|
|
|
992
|
|
|
993 if (ExpressionHelper.IsConstant(mc.Method.DeclaringType) || mc.Method.DeclaringType == typeof(object))
|
|
|
994 return false;
|
|
|
995
|
|
|
996 var attr = GetFunctionAttribute(mc.Method);
|
|
|
997
|
|
|
998 if (attr != null && !attr.ServerSideOnly)
|
|
|
999 return false;
|
|
|
1000
|
|
|
1001 break;
|
|
|
1002 }
|
|
|
1003 }
|
|
|
1004
|
|
|
1005 return true;
|
|
|
1006 });
|
|
|
1007 }
|
|
|
1008
|
|
|
1009 #endregion
|
|
|
1010
|
|
|
1011 #region CanBeCompiled
|
|
|
1012
|
|
|
1013 bool CanBeCompiled(Expression expr)
|
|
|
1014 {
|
|
|
1015 return null == expr.Find(ex =>
|
|
|
1016 {
|
|
|
1017 if (IsServerSideOnly(ex))
|
|
|
1018 return true;
|
|
|
1019
|
|
|
1020 switch (ex.NodeType)
|
|
|
1021 {
|
|
|
1022 case ExpressionType.Parameter :
|
|
|
1023 return ex != ParametersParam;
|
|
|
1024
|
|
|
1025 case ExpressionType.MemberAccess :
|
|
|
1026 {
|
|
|
1027 var attr = GetFunctionAttribute(((MemberExpression)ex).Member);
|
|
|
1028 return attr != null && attr.ServerSideOnly;
|
|
|
1029 }
|
|
|
1030
|
|
|
1031 case ExpressionType.Call :
|
|
|
1032 {
|
|
|
1033 var attr = GetFunctionAttribute(((MethodCallExpression)ex).Method);
|
|
|
1034 return attr != null && attr.ServerSideOnly;
|
|
|
1035 }
|
|
|
1036 }
|
|
|
1037
|
|
|
1038 return false;
|
|
|
1039 });
|
|
|
1040 }
|
|
|
1041
|
|
|
1042 #endregion
|
|
|
1043
|
|
|
1044 #region Build Constant
|
|
|
1045
|
|
|
1046 readonly Dictionary<Expression,SqlValue> _constants = new Dictionary<Expression,SqlValue>();
|
|
|
1047
|
|
|
1048 SqlValue BuildConstant(Expression expr, bool convertEnum)
|
|
|
1049 {
|
|
|
1050 SqlValue value;
|
|
|
1051
|
|
|
1052 if (_constants.TryGetValue(expr, out value))
|
|
|
1053 return value;
|
|
|
1054
|
|
|
1055 var lambda = Expression.Lambda<Func<object>>(Expression.Convert(expr, typeof(object)));
|
|
|
1056 var v = lambda.Compile()();
|
|
|
1057
|
|
|
1058 if (v != null && convertEnum && v.GetType().IsEnum)
|
|
|
1059 {
|
|
|
1060 var attrs = v.GetType().GetCustomAttributes(typeof(SqlEnumAttribute), true);
|
|
|
1061
|
|
|
1062 v = Map.EnumToValue(v, attrs.Length == 0);
|
|
|
1063 }
|
|
|
1064
|
|
|
1065 value = new SqlValue(v);
|
|
|
1066
|
|
|
1067 _constants.Add(expr, value);
|
|
|
1068
|
|
|
1069 return value;
|
|
|
1070 }
|
|
|
1071
|
|
|
1072 #endregion
|
|
|
1073
|
|
|
1074 #region Build Parameter
|
|
|
1075
|
|
|
1076 readonly Dictionary<Expression,ParameterAccessor> _parameters = new Dictionary<Expression, ParameterAccessor>();
|
|
|
1077
|
|
|
1078 public readonly HashSet<Expression> AsParameters = new HashSet<Expression>();
|
|
|
1079
|
|
|
1080 ParameterAccessor BuildParameter(Expression expr)
|
|
|
1081 {
|
|
|
1082 ParameterAccessor p;
|
|
|
1083
|
|
|
1084 if (_parameters.TryGetValue(expr, out p))
|
|
|
1085 return p;
|
|
|
1086
|
|
|
1087 string name = null;
|
|
|
1088
|
|
|
1089 var newExpr = ReplaceParameter(_expressionAccessors, expr, nm => name = nm);
|
|
|
1090 var mapper = Expression.Lambda<Func<Expression,object[],object>>(
|
|
|
1091 Expression.Convert(newExpr, typeof(object)),
|
|
|
1092 new [] { ExpressionParam, ParametersParam });
|
|
|
1093
|
|
|
1094 p = new ParameterAccessor
|
|
|
1095 {
|
|
|
1096 Expression = expr,
|
|
|
1097 Accessor = mapper.Compile(),
|
|
|
1098 SqlParameter = new SqlParameter(expr.Type, name, null, MappingSchema)
|
|
|
1099 };
|
|
|
1100
|
|
|
1101 _parameters.Add(expr, p);
|
|
|
1102 CurrentSqlParameters.Add(p);
|
|
|
1103
|
|
|
1104 return p;
|
|
|
1105 }
|
|
|
1106
|
|
|
1107 Expression ReplaceParameter(IDictionary<Expression,Expression> expressionAccessors, Expression expression, Action<string> setName)
|
|
|
1108 {
|
|
|
1109 return expression.Convert(expr =>
|
|
|
1110 {
|
|
|
1111 if (expr.NodeType == ExpressionType.Constant)
|
|
|
1112 {
|
|
|
1113 var c = (ConstantExpression)expr;
|
|
|
1114
|
|
|
1115 if (!ExpressionHelper.IsConstant(expr.Type) || AsParameters.Contains(c))
|
|
|
1116 {
|
|
|
1117 Expression val;
|
|
|
1118
|
|
|
1119 if (expressionAccessors.TryGetValue(expr, out val))
|
|
|
1120 {
|
|
|
1121 expr = Expression.Convert(val, expr.Type);
|
|
|
1122
|
|
|
1123 if (expression.NodeType == ExpressionType.MemberAccess)
|
|
|
1124 {
|
|
|
1125 var ma = (MemberExpression)expression;
|
|
|
1126 setName(ma.Member.Name);
|
|
|
1127 }
|
|
|
1128 }
|
|
|
1129 }
|
|
|
1130 }
|
|
|
1131
|
|
|
1132 return expr;
|
|
|
1133 });
|
|
|
1134 }
|
|
|
1135
|
|
|
1136 #endregion
|
|
|
1137
|
|
|
1138 #region Predicate Converter
|
|
|
1139
|
|
|
1140 ISqlPredicate ConvertPredicate(IBuildContext context, Expression expression)
|
|
|
1141 {
|
|
|
1142 switch (expression.NodeType)
|
|
|
1143 {
|
|
|
1144 case ExpressionType.Equal :
|
|
|
1145 case ExpressionType.NotEqual :
|
|
|
1146 case ExpressionType.GreaterThan :
|
|
|
1147 case ExpressionType.GreaterThanOrEqual :
|
|
|
1148 case ExpressionType.LessThan :
|
|
|
1149 case ExpressionType.LessThanOrEqual :
|
|
|
1150 {
|
|
|
1151 var e = (BinaryExpression)expression;
|
|
|
1152 return ConvertCompare(context, expression.NodeType, e.Left, e.Right);
|
|
|
1153 }
|
|
|
1154
|
|
|
1155 case ExpressionType.Call :
|
|
|
1156 {
|
|
|
1157 var e = (MethodCallExpression)expression;
|
|
|
1158
|
|
|
1159 ISqlPredicate predicate = null;
|
|
|
1160
|
|
|
1161 if (e.Method.Name == "Equals" && e.Object != null && e.Arguments.Count == 1)
|
|
|
1162 return ConvertCompare(context, ExpressionType.Equal, e.Object, e.Arguments[0]);
|
|
|
1163
|
|
|
1164 if (e.Method.DeclaringType == typeof(string))
|
|
|
1165 {
|
|
|
1166 switch (e.Method.Name)
|
|
|
1167 {
|
|
|
1168 case "Contains" : predicate = ConvertLikePredicate(context, e, "%", "%"); break;
|
|
|
1169 case "StartsWith" : predicate = ConvertLikePredicate(context, e, "", "%"); break;
|
|
|
1170 case "EndsWith" : predicate = ConvertLikePredicate(context, e, "%", ""); break;
|
|
|
1171 }
|
|
|
1172 }
|
|
|
1173 else if (e.Method.Name == "Contains")
|
|
|
1174 {
|
|
|
1175 if (e.Method.DeclaringType == typeof(Enumerable) ||
|
|
|
1176 TypeHelper.IsSameOrParent(typeof(IList), e.Method.DeclaringType) ||
|
|
|
1177 TypeHelper.IsSameOrParent(typeof(ICollection<>), e.Method.DeclaringType))
|
|
|
1178 {
|
|
|
1179 predicate = ConvertInPredicate(context, e);
|
|
|
1180 }
|
|
|
1181 }
|
|
|
1182 else if (e.Method.Name == "ContainsValue" && TypeHelper.IsSameOrParent(typeof(Dictionary<,>), e.Method.DeclaringType))
|
|
|
1183 {
|
|
|
1184 var args = TypeHelper.GetGenericArguments(e.Method.DeclaringType, typeof(Dictionary<,>));
|
|
|
1185 var minf = EnumerableMethods
|
|
|
1186 .First(m => m.Name == "Contains" && m.GetParameters().Length == 2)
|
|
|
1187 .MakeGenericMethod(args[1]);
|
|
|
1188
|
|
|
1189 var expr = Expression.Call(
|
|
|
1190 minf,
|
|
|
1191 Expression.PropertyOrField(e.Object, "Values"),
|
|
|
1192 e.Arguments[0]);
|
|
|
1193
|
|
|
1194 predicate = ConvertInPredicate(context, expr);
|
|
|
1195 }
|
|
|
1196 else if (e.Method.Name == "ContainsKey" && TypeHelper.IsSameOrParent(typeof(IDictionary<,>), e.Method.DeclaringType))
|
|
|
1197 {
|
|
|
1198 var args = TypeHelper.GetGenericArguments(e.Method.DeclaringType, typeof(IDictionary<,>));
|
|
|
1199 var minf = EnumerableMethods
|
|
|
1200 .First(m => m.Name == "Contains" && m.GetParameters().Length == 2)
|
|
|
1201 .MakeGenericMethod(args[0]);
|
|
|
1202
|
|
|
1203 var expr = Expression.Call(
|
|
|
1204 minf,
|
|
|
1205 Expression.PropertyOrField(e.Object, "Keys"),
|
|
|
1206 e.Arguments[0]);
|
|
|
1207
|
|
|
1208 predicate = ConvertInPredicate(context, expr);
|
|
|
1209 }
|
|
|
1210 #if !SILVERLIGHT
|
|
|
1211 else if (e.Method == ReflectionHelper.Functions.String.Like11) predicate = ConvertLikePredicate(context, e);
|
|
|
1212 else if (e.Method == ReflectionHelper.Functions.String.Like12) predicate = ConvertLikePredicate(context, e);
|
|
|
1213 #endif
|
|
|
1214 else if (e.Method == ReflectionHelper.Functions.String.Like21) predicate = ConvertLikePredicate(context, e);
|
|
|
1215 else if (e.Method == ReflectionHelper.Functions.String.Like22) predicate = ConvertLikePredicate(context, e);
|
|
|
1216
|
|
|
1217 if (predicate != null)
|
|
|
1218 return Convert(context, predicate);
|
|
|
1219
|
|
|
1220 break;
|
|
|
1221 }
|
|
|
1222
|
|
|
1223 case ExpressionType.Conditional :
|
|
|
1224 return Convert(context,
|
|
|
1225 new SqlQuery.Predicate.ExprExpr(
|
|
|
1226 ConvertToSql(context, expression, false),
|
|
|
1227 SqlQuery.Predicate.Operator.Equal,
|
|
|
1228 new SqlValue(true)));
|
|
|
1229
|
|
|
1230 case ExpressionType.MemberAccess :
|
|
|
1231 {
|
|
|
1232 var e = (MemberExpression)expression;
|
|
|
1233
|
|
|
1234 if (e.Member.Name == "HasValue" &&
|
|
|
1235 e.Member.DeclaringType.IsGenericType &&
|
|
|
1236 e.Member.DeclaringType.GetGenericTypeDefinition() == typeof(Nullable<>))
|
|
|
1237 {
|
|
|
1238 var expr = ConvertToSql(context, e.Expression, false);
|
|
|
1239 return Convert(context, new SqlQuery.Predicate.IsNull(expr, true));
|
|
|
1240 }
|
|
|
1241
|
|
|
1242 break;
|
|
|
1243 }
|
|
|
1244
|
|
|
1245 case ExpressionType.TypeIs:
|
|
|
1246 {
|
|
|
1247 var e = (TypeBinaryExpression)expression;
|
|
|
1248 var ctx = GetContext(context, e.Expression);
|
|
|
1249
|
|
|
1250 if (ctx != null && ctx.IsExpression(e.Expression, 0, RequestFor.Table).Result)
|
|
|
1251 return MakeIsPredicate(ctx, e);
|
|
|
1252
|
|
|
1253 break;
|
|
|
1254 }
|
|
|
1255 }
|
|
|
1256
|
|
|
1257 var ex = ConvertToSql(context, expression, false);
|
|
|
1258
|
|
|
1259 if (SqlExpression.NeedsEqual(ex))
|
|
|
1260 return Convert(context, new SqlQuery.Predicate.ExprExpr(ex, SqlQuery.Predicate.Operator.Equal, new SqlValue(true)));
|
|
|
1261
|
|
|
1262 return Convert(context, new SqlQuery.Predicate.Expr(ex));
|
|
|
1263 }
|
|
|
1264
|
|
|
1265 #region ConvertCompare
|
|
|
1266
|
|
|
1267 ISqlPredicate ConvertCompare(IBuildContext context, ExpressionType nodeType, Expression left, Expression right)
|
|
|
1268 {
|
|
|
1269 if (left.NodeType == ExpressionType.Convert && left.Type == typeof(int) && right.NodeType == ExpressionType.Constant)
|
|
|
1270 {
|
|
|
1271 var conv = (UnaryExpression)left;
|
|
|
1272
|
|
|
1273 if (conv.Operand.Type == typeof(char))
|
|
|
1274 {
|
|
|
1275 left = conv.Operand;
|
|
|
1276 right = Expression.Constant(ConvertTo<char>.From(((ConstantExpression)right).Value));
|
|
|
1277 }
|
|
|
1278 }
|
|
|
1279
|
|
|
1280 if (right.NodeType == ExpressionType.Convert && right.Type == typeof(int) && left.NodeType == ExpressionType.Constant)
|
|
|
1281 {
|
|
|
1282 var conv = (UnaryExpression)right;
|
|
|
1283
|
|
|
1284 if (conv.Operand.Type == typeof(char))
|
|
|
1285 {
|
|
|
1286 right = conv.Operand;
|
|
|
1287 left = Expression.Constant(ConvertTo<char>.From(((ConstantExpression)left).Value));
|
|
|
1288 }
|
|
|
1289 }
|
|
|
1290
|
|
|
1291 #region special case for char?
|
|
|
1292
|
|
|
1293 // if (left.NodeType == ExpressionType.Convert && left.Type == typeof(int?) && right.NodeType == ExpressionType.Convert)
|
|
|
1294 // {
|
|
|
1295 // var convLeft = left as UnaryExpression;
|
|
|
1296 // var convRight = right as UnaryExpression;
|
|
|
1297 //
|
|
|
1298 // if (convLeft != null && convRight != null && convLeft.Operand.Type == typeof(char?))
|
|
|
1299 // {
|
|
|
1300 // left = convLeft.Operand;
|
|
|
1301 // right = Expression.Constant(ConvertTo<char?>.From(((ConstantExpression)convRight.Operand).Value));
|
|
|
1302 // }
|
|
|
1303 // }
|
|
|
1304
|
|
|
1305 #endregion
|
|
|
1306
|
|
|
1307 switch (nodeType)
|
|
|
1308 {
|
|
|
1309 case ExpressionType.Equal :
|
|
|
1310 case ExpressionType.NotEqual :
|
|
|
1311
|
|
|
1312 var p = ConvertObjectComparison(nodeType, context, left, context, right);
|
|
|
1313 if (p != null)
|
|
|
1314 return p;
|
|
|
1315
|
|
|
1316 p = ConvertObjectNullComparison(context, left, right, nodeType == ExpressionType.Equal);
|
|
|
1317 if (p != null)
|
|
|
1318 return p;
|
|
|
1319
|
|
|
1320 p = ConvertObjectNullComparison(context, right, left, nodeType == ExpressionType.Equal);
|
|
|
1321 if (p != null)
|
|
|
1322 return p;
|
|
|
1323
|
|
|
1324 if (left.NodeType == ExpressionType.New || right.NodeType == ExpressionType.New)
|
|
|
1325 {
|
|
|
1326 p = ConvertNewObjectComparison(context, nodeType, left, right);
|
|
|
1327 if (p != null)
|
|
|
1328 return p;
|
|
|
1329 }
|
|
|
1330
|
|
|
1331 break;
|
|
|
1332 }
|
|
|
1333
|
|
|
1334 SqlQuery.Predicate.Operator op;
|
|
|
1335
|
|
|
1336 switch (nodeType)
|
|
|
1337 {
|
|
|
1338 case ExpressionType.Equal : op = SqlQuery.Predicate.Operator.Equal; break;
|
|
|
1339 case ExpressionType.NotEqual : op = SqlQuery.Predicate.Operator.NotEqual; break;
|
|
|
1340 case ExpressionType.GreaterThan : op = SqlQuery.Predicate.Operator.Greater; break;
|
|
|
1341 case ExpressionType.GreaterThanOrEqual: op = SqlQuery.Predicate.Operator.GreaterOrEqual; break;
|
|
|
1342 case ExpressionType.LessThan : op = SqlQuery.Predicate.Operator.Less; break;
|
|
|
1343 case ExpressionType.LessThanOrEqual : op = SqlQuery.Predicate.Operator.LessOrEqual; break;
|
|
|
1344 default: throw new InvalidOperationException();
|
|
|
1345 }
|
|
|
1346
|
|
|
1347 if (left.NodeType == ExpressionType.Convert || right.NodeType == ExpressionType.Convert
|
|
|
1348 || left.NodeType == ExpressionType.MemberAccess || right.NodeType == ExpressionType.MemberAccess)
|
|
|
1349 {
|
|
|
1350 var p = ConvertEnumConversion(context, left, op, right);
|
|
|
1351 if (p != null)
|
|
|
1352 return p;
|
|
|
1353 }
|
|
|
1354
|
|
|
1355 var l = ConvertToSql(context, left, false);
|
|
|
1356 var r = ConvertToSql(context, right, true);
|
|
|
1357
|
|
|
1358 switch (nodeType)
|
|
|
1359 {
|
|
|
1360 case ExpressionType.Equal :
|
|
|
1361 case ExpressionType.NotEqual:
|
|
|
1362
|
|
|
1363 if (!context.SqlQuery.IsParameterDependent && (l is SqlParameter || r is SqlParameter) && l.CanBeNull() && r.CanBeNull())
|
|
|
1364 context.SqlQuery.IsParameterDependent = true;
|
|
|
1365
|
|
|
1366 // | (SqlQuery(Select([]) as q), SqlValue(null))
|
|
|
1367 // | (SqlValue(null), SqlQuery(Select([]) as q)) =>
|
|
|
1368
|
|
|
1369 SqlQuery q =
|
|
|
1370 l.ElementType == QueryElementType.SqlQuery &&
|
|
|
1371 r.ElementType == QueryElementType.SqlValue &&
|
|
|
1372 ((SqlValue)r).Value == null &&
|
|
|
1373 ((SqlQuery)l).Select.Columns.Count == 0 ?
|
|
|
1374 (SqlQuery)l :
|
|
|
1375 r.ElementType == QueryElementType.SqlQuery &&
|
|
|
1376 l.ElementType == QueryElementType.SqlValue &&
|
|
|
1377 ((SqlValue)l).Value == null &&
|
|
|
1378 ((SqlQuery)r).Select.Columns.Count == 0 ?
|
|
|
1379 (SqlQuery)r :
|
|
|
1380 null;
|
|
|
1381
|
|
|
1382 if (q != null)
|
|
|
1383 {
|
|
|
1384 q.Select.Columns.Add(new SqlQuery.Column(q, new SqlValue(1)));
|
|
|
1385 }
|
|
|
1386
|
|
|
1387 break;
|
|
|
1388 }
|
|
|
1389
|
|
|
1390 if (l is SqlQuery.SearchCondition)
|
|
|
1391 l = Convert(context, new SqlFunction(typeof(bool), "CASE", l, new SqlValue(true), new SqlValue(false)));
|
|
|
1392
|
|
|
1393 if (r is SqlQuery.SearchCondition)
|
|
|
1394 r = Convert(context, new SqlFunction(typeof(bool), "CASE", r, new SqlValue(true), new SqlValue(false)));
|
|
|
1395
|
|
|
1396 return Convert(context, new SqlQuery.Predicate.ExprExpr(l, op, r));
|
|
|
1397 }
|
|
|
1398
|
|
|
1399 #endregion
|
|
|
1400
|
|
|
1401 #region ConvertEnumConversion
|
|
|
1402
|
|
|
1403 ISqlPredicate ConvertEnumConversion(IBuildContext context, Expression left, SqlQuery.Predicate.Operator op, Expression right)
|
|
|
1404 {
|
|
|
1405 Expression value;
|
|
|
1406 Expression operand;
|
|
|
1407
|
|
|
1408 if (left is MemberExpression)
|
|
|
1409 {
|
|
|
1410 operand = left;
|
|
|
1411 value = right;
|
|
|
1412 }
|
|
|
1413 else if (left.NodeType == ExpressionType.Convert && ((UnaryExpression)left).Operand is MemberExpression)
|
|
|
1414 {
|
|
|
1415 operand = ((UnaryExpression)left).Operand;
|
|
|
1416 value = right;
|
|
|
1417 }
|
|
|
1418 else if (right is MemberExpression)
|
|
|
1419 {
|
|
|
1420 operand = right;
|
|
|
1421 value = left;
|
|
|
1422 }
|
|
|
1423 else if (right.NodeType == ExpressionType.Convert && ((UnaryExpression)right).Operand is MemberExpression)
|
|
|
1424 {
|
|
|
1425 operand = ((UnaryExpression)right).Operand;
|
|
|
1426 value = left;
|
|
|
1427 }
|
|
|
1428 else if (left.NodeType == ExpressionType.Convert)
|
|
|
1429 {
|
|
|
1430 operand = ((UnaryExpression)left).Operand;
|
|
|
1431 value = right;
|
|
|
1432 }
|
|
|
1433 else
|
|
|
1434 {
|
|
|
1435 operand = ((UnaryExpression)right).Operand;
|
|
|
1436 value = left;
|
|
|
1437 }
|
|
|
1438
|
|
|
1439 var type = operand.Type;
|
|
|
1440
|
|
|
1441 if (!TypeHelper.IsEnumOrNullableEnum(type))
|
|
|
1442 return null;
|
|
|
1443
|
|
|
1444 var dic = new Dictionary<object,object>();
|
|
|
1445
|
|
|
1446 var nullValue = MappingSchema.GetNullValue(type);
|
|
|
1447
|
|
|
1448 if (nullValue != null)
|
|
|
1449 dic.Add(nullValue, null);
|
|
|
1450
|
|
|
1451 var mapValues = MappingSchema.GetMapValues(type);
|
|
|
1452
|
|
|
1453 if (mapValues != null)
|
|
|
1454 foreach (var mv in mapValues)
|
|
|
1455 if (!dic.ContainsKey(mv.OrigValue))
|
|
|
1456 dic.Add(mv.OrigValue, mv.MapValues[0]);
|
|
|
1457
|
|
|
1458 switch (value.NodeType)
|
|
|
1459 {
|
|
|
1460 case ExpressionType.Constant:
|
|
|
1461 {
|
|
|
1462 var name = Enum.GetName(type, ((ConstantExpression)value).Value);
|
|
|
1463
|
|
|
1464 // ReSharper disable ConditionIsAlwaysTrueOrFalse
|
|
|
1465 // ReSharper disable HeuristicUnreachableCode
|
|
|
1466 if (name == null)
|
|
|
1467 return null;
|
|
|
1468 // ReSharper restore HeuristicUnreachableCode
|
|
|
1469 // ReSharper restore ConditionIsAlwaysTrueOrFalse
|
|
|
1470
|
|
|
1471 var origValue = Enum.Parse(type, name, false);
|
|
|
1472 var mapValue = origValue;
|
|
|
1473
|
|
|
1474 if (!(operand is MemberExpression))
|
|
|
1475 {
|
|
|
1476 if (!dic.TryGetValue(origValue, out mapValue))
|
|
|
1477 return null;
|
|
|
1478 }
|
|
|
1479
|
|
|
1480 ISqlExpression l, r;
|
|
|
1481
|
|
|
1482 SqlValue sqlValue;
|
|
|
1483
|
|
|
1484 if (left.NodeType == ExpressionType.Convert)
|
|
|
1485 {
|
|
|
1486 l = ConvertToSql(context, operand, false);
|
|
|
1487 r = sqlValue = new SqlValue(mapValue);
|
|
|
1488 }
|
|
|
1489 else
|
|
|
1490 {
|
|
|
1491 r = ConvertToSql(context, operand, false);
|
|
|
1492 l = sqlValue = new SqlValue(mapValue);
|
|
|
1493 }
|
|
|
1494
|
|
|
1495 if (operand is MemberExpression)
|
|
|
1496 {
|
|
|
1497 var me = (MemberExpression)operand;
|
|
|
1498 var memberAccessor = TypeAccessor.GetAccessor(me.Member.DeclaringType)[me.Member.Name];
|
|
|
1499 sqlValue.SetEnumConverter(memberAccessor, MappingSchema);
|
|
|
1500 }
|
|
|
1501
|
|
|
1502
|
|
|
1503 return Convert(context, new SqlQuery.Predicate.ExprExpr(l, op, r));
|
|
|
1504 }
|
|
|
1505
|
|
|
1506 case ExpressionType.Convert:
|
|
|
1507 {
|
|
|
1508 value = ((UnaryExpression)value).Operand;
|
|
|
1509
|
|
|
1510 var l = ConvertToSql(context, operand, false, false);
|
|
|
1511 var r = ConvertToSql(context, value, false, false);
|
|
|
1512
|
|
|
1513 MemberAccessor memberAccessor = null;
|
|
|
1514
|
|
|
1515 if (operand is MemberExpression)
|
|
|
1516 {
|
|
|
1517 // is it even possible that operand is not MemberExpression?
|
|
|
1518 // if no, then we can remove this two last uses of SetEnumConverter(type, map)
|
|
|
1519 // and other depending code
|
|
|
1520 // At least currently there is no test coverage for this method and I didn't
|
|
|
1521 // manage to create such test
|
|
|
1522 var me = (MemberExpression)operand;
|
|
|
1523 memberAccessor = TypeAccessor.GetAccessor(me.Member.DeclaringType)[me.Member.Name];
|
|
|
1524 }
|
|
|
1525
|
|
|
1526 if (l is SqlValueBase)
|
|
|
1527 {
|
|
|
1528 if (memberAccessor != null)
|
|
|
1529 {
|
|
|
1530 ((SqlValueBase)l).SetEnumConverter(memberAccessor, MappingSchema);
|
|
|
1531 }
|
|
|
1532 else
|
|
|
1533 {
|
|
|
1534 ((SqlValueBase)l).SetEnumConverter(type, MappingSchema);
|
|
|
1535 }
|
|
|
1536 }
|
|
|
1537
|
|
|
1538 if (r is SqlValueBase)
|
|
|
1539 {
|
|
|
1540 if (memberAccessor != null)
|
|
|
1541 {
|
|
|
1542 ((SqlValueBase)r).SetEnumConverter(memberAccessor, MappingSchema);
|
|
|
1543 }
|
|
|
1544 else
|
|
|
1545 {
|
|
|
1546 ((SqlValueBase)r).SetEnumConverter(type, MappingSchema);
|
|
|
1547 }
|
|
|
1548 }
|
|
|
1549
|
|
|
1550 return Convert(context, new SqlQuery.Predicate.ExprExpr(l, op, r));
|
|
|
1551 }
|
|
|
1552 }
|
|
|
1553
|
|
|
1554 return null;
|
|
|
1555 }
|
|
|
1556
|
|
|
1557 #endregion
|
|
|
1558
|
|
|
1559 #region ConvertObjectNullComparison
|
|
|
1560
|
|
|
1561 ISqlPredicate ConvertObjectNullComparison(IBuildContext context, Expression left, Expression right, bool isEqual)
|
|
|
1562 {
|
|
|
1563 if (right.NodeType == ExpressionType.Constant && ((ConstantExpression)right).Value == null)
|
|
|
1564 {
|
|
|
1565 if (left.NodeType == ExpressionType.MemberAccess || left.NodeType == ExpressionType.Parameter)
|
|
|
1566 {
|
|
|
1567 var ctx = GetContext(context, left);
|
|
|
1568
|
|
|
1569 if (ctx != null && ctx.IsExpression(left, 0, RequestFor.Object).Result ||
|
|
|
1570 left.NodeType == ExpressionType.Parameter && ctx.IsExpression(left, 0, RequestFor.Field).Result)
|
|
|
1571 {
|
|
|
1572 return new SqlQuery.Predicate.Expr(new SqlValue(!isEqual));
|
|
|
1573 }
|
|
|
1574 }
|
|
|
1575 }
|
|
|
1576
|
|
|
1577 return null;
|
|
|
1578 }
|
|
|
1579
|
|
|
1580 #endregion
|
|
|
1581
|
|
|
1582 #region ConvertObjectComparison
|
|
|
1583
|
|
|
1584 public ISqlPredicate ConvertObjectComparison(
|
|
|
1585 ExpressionType nodeType,
|
|
|
1586 IBuildContext leftContext,
|
|
|
1587 Expression left,
|
|
|
1588 IBuildContext rightContext,
|
|
|
1589 Expression right)
|
|
|
1590 {
|
|
|
1591 var qsl = GetContext(leftContext, left);
|
|
|
1592 var qsr = GetContext(rightContext, right);
|
|
|
1593
|
|
|
1594 var sl = qsl != null && qsl.IsExpression(left, 0, RequestFor.Object).Result;
|
|
|
1595 var sr = qsr != null && qsr.IsExpression(right, 0, RequestFor.Object).Result;
|
|
|
1596
|
|
|
1597 bool isNull;
|
|
|
1598 SqlInfo[] lcols;
|
|
|
1599
|
|
|
1600 var rmembers = new Dictionary<MemberInfo,Expression>(new MemberInfoComparer());
|
|
|
1601
|
|
|
1602 if (sl == false && sr == false)
|
|
|
1603 {
|
|
|
1604 var lmembers = new Dictionary<MemberInfo,Expression>(new MemberInfoComparer());
|
|
|
1605
|
|
|
1606 if (!ProcessProjection(lmembers, left) && !ProcessProjection(rmembers, right))
|
|
|
1607 return null;
|
|
|
1608
|
|
|
1609 if (lmembers.Count == 0)
|
|
|
1610 {
|
|
|
1611 var r = right;
|
|
|
1612 right = left;
|
|
|
1613 left = r;
|
|
|
1614
|
|
|
1615 var c = rightContext;
|
|
|
1616 rightContext = leftContext;
|
|
|
1617 leftContext = c;
|
|
|
1618
|
|
|
1619 var q = qsr;
|
|
|
1620 qsl = q;
|
|
|
1621
|
|
|
1622 sr = false;
|
|
|
1623
|
|
|
1624 var lm = lmembers;
|
|
|
1625 lmembers = rmembers;
|
|
|
1626 rmembers = lm;
|
|
|
1627 }
|
|
|
1628
|
|
|
1629 isNull = right is ConstantExpression && ((ConstantExpression)right).Value == null;
|
|
|
1630 lcols = lmembers.Select(m => new SqlInfo(m.Key) { Sql = ConvertToSql(leftContext, m.Value, false) }).ToArray();
|
|
|
1631 }
|
|
|
1632 else
|
|
|
1633 {
|
|
|
1634 if (sl == false)
|
|
|
1635 {
|
|
|
1636 var r = right;
|
|
|
1637 right = left;
|
|
|
1638 left = r;
|
|
|
1639
|
|
|
1640 var c = rightContext;
|
|
|
1641 rightContext = leftContext;
|
|
|
1642 leftContext = c;
|
|
|
1643
|
|
|
1644 var q = qsr;
|
|
|
1645 qsl = q;
|
|
|
1646
|
|
|
1647 sr = false;
|
|
|
1648 }
|
|
|
1649
|
|
|
1650 isNull = right is ConstantExpression && ((ConstantExpression)right).Value == null;
|
|
|
1651 lcols = qsl.ConvertToSql(left, 0, ConvertFlags.Key);
|
|
|
1652
|
|
|
1653 if (!sr)
|
|
|
1654 ProcessProjection(rmembers, right);
|
|
|
1655 }
|
|
|
1656
|
|
|
1657 if (lcols.Length == 0)
|
|
|
1658 return null;
|
|
|
1659
|
|
|
1660 var condition = new SqlQuery.SearchCondition();
|
|
|
1661
|
|
|
1662 foreach (var lcol in lcols)
|
|
|
1663 {
|
|
|
1664 if (lcol.Members.Count == 0)
|
|
|
1665 throw new InvalidOperationException();
|
|
|
1666
|
|
|
1667 ISqlExpression rcol = null;
|
|
|
1668
|
|
|
1669 var lmember = lcol.Members[lcol.Members.Count - 1];
|
|
|
1670
|
|
|
1671 if (sr)
|
|
|
1672 {
|
|
|
1673 var info = rightContext.ConvertToSql(Expression.MakeMemberAccess(right, lmember), 0, ConvertFlags.Field).Single();
|
|
|
1674 rcol = info.Sql;
|
|
|
1675 }
|
|
|
1676 else
|
|
|
1677 {
|
|
|
1678 if (rmembers.Count != 0)
|
|
|
1679 {
|
|
|
1680 var info = rightContext.ConvertToSql(rmembers[lmember], 0, ConvertFlags.Field)[0];
|
|
|
1681 rcol = info.Sql;
|
|
|
1682 }
|
|
|
1683 }
|
|
|
1684
|
|
|
1685 var rex =
|
|
|
1686 isNull ?
|
|
|
1687 new SqlValue(right.Type, null) :
|
|
|
1688 rcol ?? GetParameter(right, lmember);
|
|
|
1689
|
|
|
1690 var predicate = Convert(leftContext, new SqlQuery.Predicate.ExprExpr(
|
|
|
1691 lcol.Sql,
|
|
|
1692 nodeType == ExpressionType.Equal ? SqlQuery.Predicate.Operator.Equal : SqlQuery.Predicate.Operator.NotEqual,
|
|
|
1693 rex));
|
|
|
1694
|
|
|
1695 condition.Conditions.Add(new SqlQuery.Condition(false, predicate));
|
|
|
1696 }
|
|
|
1697
|
|
|
1698 if (nodeType == ExpressionType.NotEqual)
|
|
|
1699 foreach (var c in condition.Conditions)
|
|
|
1700 c.IsOr = true;
|
|
|
1701
|
|
|
1702 return condition;
|
|
|
1703 }
|
|
|
1704
|
|
|
1705 ISqlPredicate ConvertNewObjectComparison(IBuildContext context, ExpressionType nodeType, Expression left, Expression right)
|
|
|
1706 {
|
|
|
1707 left = FindExpression(left);
|
|
|
1708 right = FindExpression(right);
|
|
|
1709
|
|
|
1710 var condition = new SqlQuery.SearchCondition();
|
|
|
1711
|
|
|
1712 if (left.NodeType != ExpressionType.New)
|
|
|
1713 {
|
|
|
1714 var temp = left;
|
|
|
1715 left = right;
|
|
|
1716 right = temp;
|
|
|
1717 }
|
|
|
1718
|
|
|
1719 var newRight = right as NewExpression;
|
|
|
1720 var newExpr = (NewExpression)left;
|
|
|
1721
|
|
|
1722 // ReSharper disable ConditionIsAlwaysTrueOrFalse
|
|
|
1723 // ReSharper disable HeuristicUnreachableCode
|
|
|
1724 if (newExpr.Members == null)
|
|
|
1725 return null;
|
|
|
1726 // ReSharper restore HeuristicUnreachableCode
|
|
|
1727 // ReSharper restore ConditionIsAlwaysTrueOrFalse
|
|
|
1728
|
|
|
1729 for (var i = 0; i < newExpr.Arguments.Count; i++)
|
|
|
1730 {
|
|
|
1731 var lex = ConvertToSql(context, newExpr.Arguments[i], false);
|
|
|
1732 var rex =
|
|
|
1733 newRight != null ?
|
|
|
1734 ConvertToSql(context, newRight.Arguments[i], false) :
|
|
|
1735 GetParameter(right, newExpr.Members[i]);
|
|
|
1736
|
|
|
1737 var predicate = Convert(context,
|
|
|
1738 new SqlQuery.Predicate.ExprExpr(
|
|
|
1739 lex,
|
|
|
1740 nodeType == ExpressionType.Equal ? SqlQuery.Predicate.Operator.Equal : SqlQuery.Predicate.Operator.NotEqual,
|
|
|
1741 rex));
|
|
|
1742
|
|
|
1743 condition.Conditions.Add(new SqlQuery.Condition(false, predicate));
|
|
|
1744 }
|
|
|
1745
|
|
|
1746 if (nodeType == ExpressionType.NotEqual)
|
|
|
1747 foreach (var c in condition.Conditions)
|
|
|
1748 c.IsOr = true;
|
|
|
1749
|
|
|
1750 return condition;
|
|
|
1751 }
|
|
|
1752
|
|
|
1753 ISqlExpression GetParameter(Expression ex, MemberInfo member)
|
|
|
1754 {
|
|
|
1755 if (member is MethodInfo)
|
|
|
1756 member = TypeHelper.GetPropertyByMethod((MethodInfo)member);
|
|
|
1757
|
|
|
1758 var par = ReplaceParameter(_expressionAccessors, ex, _ => {});
|
|
|
1759 var expr = Expression.MakeMemberAccess(par.Type == typeof(object) ? Expression.Convert(par, member.DeclaringType) : par, member);
|
|
|
1760 var mapper = Expression.Lambda<Func<Expression,object[],object>>(
|
|
|
1761 Expression.Convert(expr, typeof(object)),
|
|
|
1762 new [] { ExpressionParam, ParametersParam });
|
|
|
1763
|
|
|
1764 var p = new ParameterAccessor
|
|
|
1765 {
|
|
|
1766 Expression = expr,
|
|
|
1767 Accessor = mapper.Compile(),
|
|
|
1768 SqlParameter = new SqlParameter(expr.Type, member.Name, null, MappingSchema)
|
|
|
1769 };
|
|
|
1770
|
|
|
1771 _parameters.Add(expr, p);
|
|
|
1772 CurrentSqlParameters.Add(p);
|
|
|
1773
|
|
|
1774 return p.SqlParameter;
|
|
|
1775 }
|
|
|
1776
|
|
|
1777 static Expression FindExpression(Expression expr)
|
|
|
1778 {
|
|
|
1779 var ret = expr.Find(pi =>
|
|
|
1780 {
|
|
|
1781 switch (pi.NodeType)
|
|
|
1782 {
|
|
|
1783 case ExpressionType.Convert :
|
|
|
1784 {
|
|
|
1785 var e = (UnaryExpression)expr;
|
|
|
1786
|
|
|
1787 return
|
|
|
1788 e.Operand.NodeType == ExpressionType.ArrayIndex &&
|
|
|
1789 ((BinaryExpression)e.Operand).Left == ParametersParam;
|
|
|
1790 }
|
|
|
1791
|
|
|
1792 case ExpressionType.MemberAccess :
|
|
|
1793 case ExpressionType.New :
|
|
|
1794 return true;
|
|
|
1795 }
|
|
|
1796
|
|
|
1797 return false;
|
|
|
1798 });
|
|
|
1799
|
|
|
1800 if (ret == null)
|
|
|
1801 throw new InvalidOperationException();
|
|
|
1802
|
|
|
1803 return ret;
|
|
|
1804 }
|
|
|
1805
|
|
|
1806 #endregion
|
|
|
1807
|
|
|
1808 #region ConvertInPredicate
|
|
|
1809
|
|
|
1810 private ISqlPredicate ConvertInPredicate(IBuildContext context, MethodCallExpression expression)
|
|
|
1811 {
|
|
|
1812 var e = expression;
|
|
|
1813 var argIndex = e.Object != null ? 0 : 1;
|
|
|
1814 var arr = e.Object ?? e.Arguments[0];
|
|
|
1815 var arg = e.Arguments[argIndex];
|
|
|
1816
|
|
|
1817 ISqlExpression expr = null;
|
|
|
1818
|
|
|
1819 var ctx = GetContext(context, arg);
|
|
|
1820
|
|
|
1821 if (ctx is TableBuilder.TableContext &&
|
|
|
1822 ctx.SqlQuery != context.SqlQuery &&
|
|
|
1823 ctx.IsExpression(arg, 0, RequestFor.Object).Result)
|
|
|
1824 {
|
|
|
1825 expr = ctx.SqlQuery;
|
|
|
1826 }
|
|
|
1827
|
|
|
1828 if (expr == null)
|
|
|
1829 {
|
|
|
1830 var sql = ConvertExpressions(context, arg, ConvertFlags.Key);
|
|
|
1831
|
|
|
1832 if (sql.Length == 1 && sql[0].Members.Count == 0)
|
|
|
1833 expr = sql[0].Sql;
|
|
|
1834 else
|
|
|
1835 expr = new SqlExpression(
|
|
|
1836 '\x1' + string.Join(",", sql.Select(s => s.Members[s.Members.Count - 1].Name).ToArray()),
|
|
|
1837 sql.Select(s => s.Sql).ToArray());
|
|
|
1838 }
|
|
|
1839
|
|
|
1840 MemberAccessor memberAccessor = null;
|
|
|
1841
|
|
|
1842 if (arg is MemberExpression)
|
|
|
1843 {
|
|
|
1844 var me = (MemberExpression)arg;
|
|
|
1845 if (TypeHelper.IsEnumOrNullableEnum(me.Type))
|
|
|
1846 {
|
|
|
1847 memberAccessor = TypeAccessor.GetAccessor(me.Member.DeclaringType)[me.Member.Name];
|
|
|
1848 }
|
|
|
1849 }
|
|
|
1850
|
|
|
1851 switch (arr.NodeType)
|
|
|
1852 {
|
|
|
1853 case ExpressionType.NewArrayInit :
|
|
|
1854 {
|
|
|
1855 var newArr = (NewArrayExpression)arr;
|
|
|
1856
|
|
|
1857 if (newArr.Expressions.Count == 0)
|
|
|
1858 return new SqlQuery.Predicate.Expr(new SqlValue(false));
|
|
|
1859
|
|
|
1860 var exprs = new ISqlExpression[newArr.Expressions.Count];
|
|
|
1861
|
|
|
1862 for (var i = 0; i < newArr.Expressions.Count; i++)
|
|
|
1863 {
|
|
|
1864 exprs[i] = ConvertToSql(context, newArr.Expressions[i], false, false);
|
|
|
1865
|
|
|
1866 if (memberAccessor != null && exprs[i] is SqlValue)
|
|
|
1867 {
|
|
|
1868 ((SqlValue)exprs[i]).SetEnumConverter(memberAccessor, MappingSchema);
|
|
|
1869 }
|
|
|
1870 }
|
|
|
1871
|
|
|
1872 return new SqlQuery.Predicate.InList(expr, false, exprs);
|
|
|
1873 }
|
|
|
1874
|
|
|
1875 default :
|
|
|
1876
|
|
|
1877 if (CanBeCompiled(arr))
|
|
|
1878 {
|
|
|
1879 var p = BuildParameter(arr).SqlParameter;
|
|
|
1880 p.IsQueryParameter = false;
|
|
|
1881 if (memberAccessor != null)
|
|
|
1882 {
|
|
|
1883 p.SetEnumConverter(memberAccessor, MappingSchema);
|
|
|
1884 }
|
|
|
1885 return new SqlQuery.Predicate.InList(expr, false, p);
|
|
|
1886 }
|
|
|
1887
|
|
|
1888 break;
|
|
|
1889 }
|
|
|
1890
|
|
|
1891 throw new LinqException("'{0}' cannot be converted to SQL.", expression);
|
|
|
1892 }
|
|
|
1893
|
|
|
1894 #endregion
|
|
|
1895
|
|
|
1896 #region LIKE predicate
|
|
|
1897
|
|
|
1898 ISqlPredicate ConvertLikePredicate(IBuildContext context, MethodCallExpression expression, string start, string end)
|
|
|
1899 {
|
|
|
1900 var e = expression;
|
|
|
1901 var o = ConvertToSql(context, e.Object, false);
|
|
|
1902 var a = ConvertToSql(context, e.Arguments[0], false);
|
|
|
1903
|
|
|
1904 if (a is SqlValue)
|
|
|
1905 {
|
|
|
1906 var value = ((SqlValue)a).Value;
|
|
|
1907
|
|
|
1908 if (value == null)
|
|
|
1909 throw new LinqException("NULL cannot be used as a LIKE predicate parameter.");
|
|
|
1910
|
|
|
1911 return value.ToString().IndexOfAny(new[] { '%', '_' }) < 0?
|
|
|
1912 new SqlQuery.Predicate.Like(o, false, new SqlValue(start + value + end), null):
|
|
|
1913 new SqlQuery.Predicate.Like(o, false, new SqlValue(start + EscapeLikeText(value.ToString()) + end), new SqlValue('~'));
|
|
|
1914 }
|
|
|
1915
|
|
|
1916 if (a is SqlParameter)
|
|
|
1917 {
|
|
|
1918 var p = (SqlParameter)a;
|
|
|
1919 var ep = (from pm in CurrentSqlParameters where pm.SqlParameter == p select pm).First();
|
|
|
1920
|
|
|
1921 ep = new ParameterAccessor
|
|
|
1922 {
|
|
|
1923 Expression = ep.Expression,
|
|
|
1924 Accessor = ep.Accessor,
|
|
|
1925 SqlParameter = new SqlParameter(ep.Expression.Type, p.Name, p.Value, GetLikeEscaper(start, end))
|
|
|
1926 };
|
|
|
1927
|
|
|
1928 CurrentSqlParameters.Add(ep);
|
|
|
1929
|
|
|
1930 return new SqlQuery.Predicate.Like(o, false, ep.SqlParameter, new SqlValue('~'));
|
|
|
1931 }
|
|
|
1932
|
|
|
1933 var mi = ReflectionHelper.Expressor<string>.MethodExpressor(_ => _.Replace("", ""));
|
|
|
1934 var ex =
|
|
|
1935 Expression.Call(
|
|
|
1936 Expression.Call(
|
|
|
1937 Expression.Call(
|
|
|
1938 e.Arguments[0],
|
|
|
1939 mi, Expression.Constant("~"), Expression.Constant("~~")),
|
|
|
1940 mi, Expression.Constant("%"), Expression.Constant("~%")),
|
|
|
1941 mi, Expression.Constant("_"), Expression.Constant("~_"));
|
|
|
1942
|
|
|
1943 var expr = ConvertToSql(context, ConvertExpression(ex), false);
|
|
|
1944
|
|
|
1945 if (!string.IsNullOrEmpty(start))
|
|
|
1946 expr = new SqlBinaryExpression(typeof(string), new SqlValue("%"), "+", expr);
|
|
|
1947
|
|
|
1948 if (!string.IsNullOrEmpty(end))
|
|
|
1949 expr = new SqlBinaryExpression(typeof(string), expr, "+", new SqlValue("%"));
|
|
|
1950
|
|
|
1951 return new SqlQuery.Predicate.Like(o, false, expr, new SqlValue('~'));
|
|
|
1952 }
|
|
|
1953
|
|
|
1954 ISqlPredicate ConvertLikePredicate(IBuildContext context, MethodCallExpression expression)
|
|
|
1955 {
|
|
|
1956 var e = expression;
|
|
|
1957 var a1 = ConvertToSql(context, e.Arguments[0], false);
|
|
|
1958 var a2 = ConvertToSql(context, e.Arguments[1], false);
|
|
|
1959
|
|
|
1960 ISqlExpression a3 = null;
|
|
|
1961
|
|
|
1962 if (e.Arguments.Count == 3)
|
|
|
1963 a3 = ConvertToSql(context, e.Arguments[2], false);
|
|
|
1964
|
|
|
1965 return new SqlQuery.Predicate.Like(a1, false, a2, a3);
|
|
|
1966 }
|
|
|
1967
|
|
|
1968 static string EscapeLikeText(string text)
|
|
|
1969 {
|
|
|
1970 if (text.IndexOfAny(new[] { '%', '_' }) < 0)
|
|
|
1971 return text;
|
|
|
1972
|
|
|
1973 var builder = new StringBuilder(text.Length);
|
|
|
1974
|
|
|
1975 foreach (var ch in text)
|
|
|
1976 {
|
|
|
1977 switch (ch)
|
|
|
1978 {
|
|
|
1979 case '%':
|
|
|
1980 case '_':
|
|
|
1981 case '~':
|
|
|
1982 builder.Append('~');
|
|
|
1983 break;
|
|
|
1984 }
|
|
|
1985
|
|
|
1986 builder.Append(ch);
|
|
|
1987 }
|
|
|
1988
|
|
|
1989 return builder.ToString();
|
|
|
1990 }
|
|
|
1991
|
|
|
1992 static Converter<object,object> GetLikeEscaper(string start, string end)
|
|
|
1993 {
|
|
|
1994 return value => value == null? null: start + EscapeLikeText(value.ToString()) + end;
|
|
|
1995 }
|
|
|
1996
|
|
|
1997 #endregion
|
|
|
1998
|
|
|
1999 #region MakeIsPredicate
|
|
|
2000
|
|
|
2001 internal ISqlPredicate MakeIsPredicate(TableBuilder.TableContext table, Type typeOperand)
|
|
|
2002 {
|
|
|
2003 if (typeOperand == table.ObjectType && !table.InheritanceMapping.Any(m => m.Type == typeOperand))
|
|
|
2004 return Convert(table, new SqlQuery.Predicate.Expr(new SqlValue(true)));
|
|
|
2005
|
|
|
2006 return MakeIsPredicate(
|
|
|
2007 table, table.InheritanceMapping, table.InheritanceDiscriminators, typeOperand,
|
|
|
2008 name => table.SqlTable.Fields.Values.First(f => f.Name == name));
|
|
|
2009 }
|
|
|
2010
|
|
|
2011 internal ISqlPredicate MakeIsPredicate(
|
|
|
2012 IBuildContext context,
|
|
|
2013 List<InheritanceMappingAttribute> inheritanceMapping,
|
|
|
2014 List<string> inheritanceDiscriminators,
|
|
|
2015 Type toType,
|
|
|
2016 Func<string,ISqlExpression> getSql)
|
|
|
2017 {
|
|
|
2018 var mapping = inheritanceMapping
|
|
|
2019 .Select((m,i) => new { m, i })
|
|
|
2020 .Where ( m => m.m.Type == toType && !m.m.IsDefault)
|
|
|
2021 .ToList();
|
|
|
2022
|
|
|
2023 switch (mapping.Count)
|
|
|
2024 {
|
|
|
2025 case 0 :
|
|
|
2026 {
|
|
|
2027 var cond = new SqlQuery.SearchCondition();
|
|
|
2028
|
|
|
2029 foreach (var m in inheritanceMapping.Select((m,i) => new { m, i }).Where(m => !m.m.IsDefault))
|
|
|
2030 {
|
|
|
2031 cond.Conditions.Add(
|
|
|
2032 new SqlQuery.Condition(
|
|
|
2033 false,
|
|
|
2034 Convert(context,
|
|
|
2035 new SqlQuery.Predicate.ExprExpr(
|
|
|
2036 getSql(inheritanceDiscriminators[m.i]),
|
|
|
2037 SqlQuery.Predicate.Operator.NotEqual,
|
|
|
2038 new SqlValue(m.m.Code)))));
|
|
|
2039 }
|
|
|
2040
|
|
|
2041 return cond;
|
|
|
2042 }
|
|
|
2043
|
|
|
2044 case 1 :
|
|
|
2045 return Convert(context,
|
|
|
2046 new SqlQuery.Predicate.ExprExpr(
|
|
|
2047 getSql(inheritanceDiscriminators[mapping[0].i]),
|
|
|
2048 SqlQuery.Predicate.Operator.Equal,
|
|
|
2049 new SqlValue(mapping[0].m.Code)));
|
|
|
2050
|
|
|
2051 default:
|
|
|
2052 {
|
|
|
2053 var cond = new SqlQuery.SearchCondition();
|
|
|
2054
|
|
|
2055 foreach (var m in mapping)
|
|
|
2056 {
|
|
|
2057 cond.Conditions.Add(
|
|
|
2058 new SqlQuery.Condition(
|
|
|
2059 false,
|
|
|
2060 Convert(context,
|
|
|
2061 new SqlQuery.Predicate.ExprExpr(
|
|
|
2062 getSql(inheritanceDiscriminators[m.i]),
|
|
|
2063 SqlQuery.Predicate.Operator.Equal,
|
|
|
2064 new SqlValue(m.m.Code))),
|
|
|
2065 true));
|
|
|
2066 }
|
|
|
2067
|
|
|
2068 return cond;
|
|
|
2069 }
|
|
|
2070 }
|
|
|
2071 }
|
|
|
2072
|
|
|
2073 ISqlPredicate MakeIsPredicate(IBuildContext context, TypeBinaryExpression expression)
|
|
|
2074 {
|
|
|
2075 var typeOperand = expression.TypeOperand;
|
|
|
2076 var table = new TableBuilder.TableContext(this, new BuildInfo((IBuildContext)null, Expression.Constant(null), new SqlQuery()), typeOperand);
|
|
|
2077
|
|
|
2078 if (typeOperand == table.ObjectType && !table.InheritanceMapping.Any(m => m.Type == typeOperand))
|
|
|
2079 return Convert(table, new SqlQuery.Predicate.Expr(new SqlValue(true)));
|
|
|
2080
|
|
|
2081 var mapping = table.InheritanceMapping.Select((m,i) => new { m, i }).Where(m => m.m.Type == typeOperand && !m.m.IsDefault).ToList();
|
|
|
2082 var isEqual = true;
|
|
|
2083
|
|
|
2084 if (mapping.Count == 0)
|
|
|
2085 {
|
|
|
2086 mapping = table.InheritanceMapping.Select((m,i) => new { m, i }).Where(m => !m.m.IsDefault).ToList();
|
|
|
2087 isEqual = false;
|
|
|
2088 }
|
|
|
2089
|
|
|
2090 Expression expr = null;
|
|
|
2091
|
|
|
2092 foreach (var m in mapping)
|
|
|
2093 {
|
|
|
2094 var field = table.SqlTable.Fields[table.InheritanceDiscriminators[m.i]];
|
|
|
2095 var ttype = field.MemberMapper.MemberAccessor.TypeAccessor.OriginalType;
|
|
|
2096 var obj = expression.Expression;
|
|
|
2097
|
|
|
2098 if (obj.Type != ttype)
|
|
|
2099 obj = Expression.Convert(expression.Expression, ttype);
|
|
|
2100
|
|
|
2101 var left = Expression.PropertyOrField(obj, field.Name);
|
|
|
2102 var code = m.m.Code;
|
|
|
2103
|
|
|
2104 if (code == null)
|
|
|
2105 code = TypeHelper.GetDefaultValue(left.Type);
|
|
|
2106 else if (left.Type != code.GetType())
|
|
|
2107 code = MappingSchema.ConvertChangeType(code, left.Type);
|
|
|
2108
|
|
|
2109 Expression right = Expression.Constant(code, left.Type);
|
|
|
2110
|
|
|
2111 var e = isEqual ? Expression.Equal(left, right) : Expression.NotEqual(left, right);
|
|
|
2112
|
|
|
2113 expr = expr != null ? Expression.AndAlso(expr, e) : e;
|
|
|
2114 }
|
|
|
2115
|
|
|
2116 return ConvertPredicate(context, expr);
|
|
|
2117 }
|
|
|
2118
|
|
|
2119 #endregion
|
|
|
2120
|
|
|
2121 #endregion
|
|
|
2122
|
|
|
2123 #region Search Condition Builder
|
|
|
2124
|
|
|
2125 void BuildSearchCondition(IBuildContext context, Expression expression, List<SqlQuery.Condition> conditions)
|
|
|
2126 {
|
|
|
2127 switch (expression.NodeType)
|
|
|
2128 {
|
|
|
2129 case ExpressionType.And :
|
|
|
2130 case ExpressionType.AndAlso :
|
|
|
2131 {
|
|
|
2132 var e = (BinaryExpression)expression;
|
|
|
2133
|
|
|
2134 BuildSearchCondition(context, e.Left, conditions);
|
|
|
2135 BuildSearchCondition(context, e.Right, conditions);
|
|
|
2136
|
|
|
2137 break;
|
|
|
2138 }
|
|
|
2139
|
|
|
2140 case ExpressionType.Or :
|
|
|
2141 case ExpressionType.OrElse :
|
|
|
2142 {
|
|
|
2143 var e = (BinaryExpression)expression;
|
|
|
2144 var orCondition = new SqlQuery.SearchCondition();
|
|
|
2145
|
|
|
2146 BuildSearchCondition(context, e.Left, orCondition.Conditions);
|
|
|
2147 orCondition.Conditions[orCondition.Conditions.Count - 1].IsOr = true;
|
|
|
2148 BuildSearchCondition(context, e.Right, orCondition.Conditions);
|
|
|
2149
|
|
|
2150 conditions.Add(new SqlQuery.Condition(false, orCondition));
|
|
|
2151
|
|
|
2152 break;
|
|
|
2153 }
|
|
|
2154
|
|
|
2155 case ExpressionType.Not :
|
|
|
2156 {
|
|
|
2157 var e = expression as UnaryExpression;
|
|
|
2158 var notCondition = new SqlQuery.SearchCondition();
|
|
|
2159
|
|
|
2160 BuildSearchCondition(context, e.Operand, notCondition.Conditions);
|
|
|
2161
|
|
|
2162 if (notCondition.Conditions.Count == 1 && notCondition.Conditions[0].Predicate is SqlQuery.Predicate.NotExpr)
|
|
|
2163 {
|
|
|
2164 var p = notCondition.Conditions[0].Predicate as SqlQuery.Predicate.NotExpr;
|
|
|
2165 p.IsNot = !p.IsNot;
|
|
|
2166 conditions.Add(notCondition.Conditions[0]);
|
|
|
2167 }
|
|
|
2168 else
|
|
|
2169 conditions.Add(new SqlQuery.Condition(true, notCondition));
|
|
|
2170
|
|
|
2171 break;
|
|
|
2172 }
|
|
|
2173
|
|
|
2174 default :
|
|
|
2175 var predicate = ConvertPredicate(context, expression);
|
|
|
2176
|
|
|
2177 if (predicate is SqlQuery.Predicate.Expr)
|
|
|
2178 {
|
|
|
2179 var expr = ((SqlQuery.Predicate.Expr)predicate).Expr1;
|
|
|
2180
|
|
|
2181 if (expr.ElementType == QueryElementType.SearchCondition)
|
|
|
2182 {
|
|
|
2183 var sc = (SqlQuery.SearchCondition)expr;
|
|
|
2184
|
|
|
2185 if (sc.Conditions.Count == 1)
|
|
|
2186 {
|
|
|
2187 conditions.Add(sc.Conditions[0]);
|
|
|
2188 break;
|
|
|
2189 }
|
|
|
2190 }
|
|
|
2191 }
|
|
|
2192
|
|
|
2193 conditions.Add(new SqlQuery.Condition(false, predicate));
|
|
|
2194
|
|
|
2195 break;
|
|
|
2196 }
|
|
|
2197 }
|
|
|
2198
|
|
|
2199 #endregion
|
|
|
2200
|
|
|
2201 #region CanBeTranslatedToSql
|
|
|
2202
|
|
|
2203 bool CanBeTranslatedToSql(IBuildContext context, Expression expr, bool canBeCompiled)
|
|
|
2204 {
|
|
|
2205 List<Expression> ignoredMembers = null;
|
|
|
2206
|
|
|
2207 return null == expr.Find(pi =>
|
|
|
2208 {
|
|
|
2209 if (ignoredMembers != null)
|
|
|
2210 {
|
|
|
2211 if (pi != ignoredMembers[ignoredMembers.Count - 1])
|
|
|
2212 throw new InvalidOperationException();
|
|
|
2213
|
|
|
2214 if (ignoredMembers.Count == 1)
|
|
|
2215 ignoredMembers = null;
|
|
|
2216 else
|
|
|
2217 ignoredMembers.RemoveAt(ignoredMembers.Count - 1);
|
|
|
2218
|
|
|
2219 return false;
|
|
|
2220 }
|
|
|
2221
|
|
|
2222 switch (pi.NodeType)
|
|
|
2223 {
|
|
|
2224 case ExpressionType.MemberAccess :
|
|
|
2225 {
|
|
|
2226 var ma = (MemberExpression)pi;
|
|
|
2227 var attr = GetFunctionAttribute(ma.Member);
|
|
|
2228
|
|
|
2229 if (attr == null && !TypeHelper.IsNullableValueMember(ma.Member))
|
|
|
2230 {
|
|
|
2231 if (canBeCompiled)
|
|
|
2232 {
|
|
|
2233 var ctx = GetContext(context, pi);
|
|
|
2234
|
|
|
2235 if (ctx == null)
|
|
|
2236 return !CanBeCompiled(pi);
|
|
|
2237
|
|
|
2238 if (ctx.IsExpression(pi, 0, RequestFor.Object).Result)
|
|
|
2239 return !CanBeCompiled(pi);
|
|
|
2240
|
|
|
2241 ignoredMembers = ma.Expression.GetMembers();
|
|
|
2242 }
|
|
|
2243 }
|
|
|
2244
|
|
|
2245 break;
|
|
|
2246 }
|
|
|
2247
|
|
|
2248 case ExpressionType.Parameter :
|
|
|
2249 {
|
|
|
2250 var ctx = GetContext(context, pi);
|
|
|
2251
|
|
|
2252 if (ctx == null)
|
|
|
2253 if (canBeCompiled)
|
|
|
2254 return !CanBeCompiled(pi);
|
|
|
2255
|
|
|
2256 break;
|
|
|
2257 }
|
|
|
2258
|
|
|
2259 case ExpressionType.Call :
|
|
|
2260 {
|
|
|
2261 var e = (MethodCallExpression)pi;
|
|
|
2262
|
|
|
2263 if (e.Method.DeclaringType != typeof(Enumerable))
|
|
|
2264 {
|
|
|
2265 var attr = GetFunctionAttribute(e.Method);
|
|
|
2266
|
|
|
2267 if (attr == null && canBeCompiled)
|
|
|
2268 return !CanBeCompiled(pi);
|
|
|
2269 }
|
|
|
2270
|
|
|
2271 break;
|
|
|
2272 }
|
|
|
2273
|
|
|
2274 case ExpressionType.TypeIs : return canBeCompiled;
|
|
|
2275 case ExpressionType.TypeAs :
|
|
|
2276 case ExpressionType.New : return true;
|
|
|
2277
|
|
|
2278 case ExpressionType.NotEqual :
|
|
|
2279 case ExpressionType.Equal :
|
|
|
2280 {
|
|
|
2281 var e = (BinaryExpression)pi;
|
|
|
2282
|
|
|
2283 Expression obj = null;
|
|
|
2284
|
|
|
2285 if (e.Left.NodeType == ExpressionType.Constant && ((ConstantExpression)e.Left).Value == null)
|
|
|
2286 obj = e.Right;
|
|
|
2287 else if (e.Right.NodeType == ExpressionType.Constant && ((ConstantExpression)e.Right).Value == null)
|
|
|
2288 obj = e.Left;
|
|
|
2289
|
|
|
2290 if (obj != null)
|
|
|
2291 {
|
|
|
2292 var ctx = GetContext(context, obj);
|
|
|
2293
|
|
|
2294 if (ctx != null)
|
|
|
2295 {
|
|
|
2296 if (ctx.IsExpression(obj, 0, RequestFor.Table). Result ||
|
|
|
2297 ctx.IsExpression(obj, 0, RequestFor.Association).Result)
|
|
|
2298 {
|
|
|
2299 ignoredMembers = obj.GetMembers();
|
|
|
2300 }
|
|
|
2301 }
|
|
|
2302 }
|
|
|
2303
|
|
|
2304 break;
|
|
|
2305 }
|
|
|
2306 }
|
|
|
2307
|
|
|
2308 return false;
|
|
|
2309 });
|
|
|
2310 }
|
|
|
2311
|
|
|
2312 #endregion
|
|
|
2313
|
|
|
2314 #region Helpers
|
|
|
2315
|
|
|
2316 public IBuildContext GetContext([JetBrains.Annotations.NotNull] IBuildContext current, Expression expression)
|
|
|
2317 {
|
|
|
2318 var root = expression.GetRootObject();
|
|
|
2319
|
|
|
2320 for (; current != null; current = current.Parent)
|
|
|
2321 if (current.IsExpression(root, 0, RequestFor.Root).Result)
|
|
|
2322 return current;
|
|
|
2323
|
|
|
2324 return null;
|
|
|
2325 }
|
|
|
2326
|
|
|
2327 SqlFunctionAttribute GetFunctionAttribute(ICustomAttributeProvider member)
|
|
|
2328 {
|
|
|
2329 var attrs = member.GetCustomAttributes(typeof(SqlFunctionAttribute), true);
|
|
|
2330
|
|
|
2331 if (attrs.Length == 0)
|
|
|
2332 return null;
|
|
|
2333
|
|
|
2334 SqlFunctionAttribute attr = null;
|
|
|
2335
|
|
|
2336 foreach (SqlFunctionAttribute a in attrs)
|
|
|
2337 {
|
|
|
2338 if (a.SqlProvider == SqlProvider.Name)
|
|
|
2339 {
|
|
|
2340 attr = a;
|
|
|
2341 break;
|
|
|
2342 }
|
|
|
2343
|
|
|
2344 if (a.SqlProvider == null)
|
|
|
2345 attr = a;
|
|
|
2346 }
|
|
|
2347
|
|
|
2348 return attr;
|
|
|
2349 }
|
|
|
2350
|
|
|
2351 internal TableFunctionAttribute GetTableFunctionAttribute(ICustomAttributeProvider member)
|
|
|
2352 {
|
|
|
2353 var attrs = member.GetCustomAttributes(typeof(TableFunctionAttribute), true);
|
|
|
2354
|
|
|
2355 if (attrs.Length == 0)
|
|
|
2356 return null;
|
|
|
2357
|
|
|
2358 TableFunctionAttribute attr = null;
|
|
|
2359
|
|
|
2360 foreach (TableFunctionAttribute a in attrs)
|
|
|
2361 {
|
|
|
2362 if (a.SqlProvider == SqlProvider.Name)
|
|
|
2363 {
|
|
|
2364 attr = a;
|
|
|
2365 break;
|
|
|
2366 }
|
|
|
2367
|
|
|
2368 if (a.SqlProvider == null)
|
|
|
2369 attr = a;
|
|
|
2370 }
|
|
|
2371
|
|
|
2372 return attr;
|
|
|
2373 }
|
|
|
2374
|
|
|
2375 public ISqlExpression Convert(IBuildContext context, ISqlExpression expr)
|
|
|
2376 {
|
|
|
2377 SqlProvider.SqlQuery = context.SqlQuery;
|
|
|
2378 return SqlProvider.ConvertExpression(expr);
|
|
|
2379 }
|
|
|
2380
|
|
|
2381 public ISqlPredicate Convert(IBuildContext context, ISqlPredicate predicate)
|
|
|
2382 {
|
|
|
2383 SqlProvider.SqlQuery = context.SqlQuery;
|
|
|
2384 return SqlProvider.ConvertPredicate(predicate);
|
|
|
2385 }
|
|
|
2386
|
|
|
2387 public ISqlExpression ConvertTimeSpanMember(IBuildContext context, MemberExpression expression)
|
|
|
2388 {
|
|
|
2389 if (expression.Member.DeclaringType == typeof(TimeSpan))
|
|
|
2390 {
|
|
|
2391 switch (expression.Expression.NodeType)
|
|
|
2392 {
|
|
|
2393 case ExpressionType.Subtract :
|
|
|
2394 case ExpressionType.SubtractChecked:
|
|
|
2395
|
|
|
2396 Sql.DateParts datePart;
|
|
|
2397
|
|
|
2398 switch (expression.Member.Name)
|
|
|
2399 {
|
|
|
2400 case "TotalMilliseconds" : datePart = Sql.DateParts.Millisecond; break;
|
|
|
2401 case "TotalSeconds" : datePart = Sql.DateParts.Second; break;
|
|
|
2402 case "TotalMinutes" : datePart = Sql.DateParts.Minute; break;
|
|
|
2403 case "TotalHours" : datePart = Sql.DateParts.Hour; break;
|
|
|
2404 case "TotalDays" : datePart = Sql.DateParts.Day; break;
|
|
|
2405 default : return null;
|
|
|
2406 }
|
|
|
2407
|
|
|
2408 var e = (BinaryExpression)expression.Expression;
|
|
|
2409
|
|
|
2410 return new SqlFunction(
|
|
|
2411 typeof(int),
|
|
|
2412 "DateDiff",
|
|
|
2413 new SqlValue(datePart),
|
|
|
2414 ConvertToSql(context, e.Right, false),
|
|
|
2415 ConvertToSql(context, e.Left, false));
|
|
|
2416 }
|
|
|
2417 }
|
|
|
2418
|
|
|
2419 return null;
|
|
|
2420 }
|
|
|
2421
|
|
|
2422 internal ISqlExpression ConvertSearchCondition(IBuildContext context, ISqlExpression sqlExpression)
|
|
|
2423 {
|
|
|
2424 if (sqlExpression is SqlQuery.SearchCondition)
|
|
|
2425 {
|
|
|
2426 if (sqlExpression.CanBeNull())
|
|
|
2427 {
|
|
|
2428 var notExpr = new SqlQuery.SearchCondition
|
|
|
2429 {
|
|
|
2430 Conditions = { new SqlQuery.Condition(true, new SqlQuery.Predicate.Expr(sqlExpression, sqlExpression.Precedence)) }
|
|
|
2431 };
|
|
|
2432
|
|
|
2433 return Convert(context, new SqlFunction(sqlExpression.SystemType, "CASE", sqlExpression, new SqlValue(1), notExpr, new SqlValue(0), new SqlValue(null)));
|
|
|
2434 }
|
|
|
2435
|
|
|
2436 return Convert(context, new SqlFunction(sqlExpression.SystemType, "CASE", sqlExpression, new SqlValue(1), new SqlValue(0)));
|
|
|
2437 }
|
|
|
2438
|
|
|
2439 return sqlExpression;
|
|
|
2440 }
|
|
|
2441
|
|
|
2442 public bool ProcessProjection(Dictionary<MemberInfo,Expression> members, Expression expression)
|
|
|
2443 {
|
|
|
2444 switch (expression.NodeType)
|
|
|
2445 {
|
|
|
2446 // new { ... }
|
|
|
2447 //
|
|
|
2448 case ExpressionType.New :
|
|
|
2449 {
|
|
|
2450 var expr = (NewExpression)expression;
|
|
|
2451
|
|
|
2452 // ReSharper disable ConditionIsAlwaysTrueOrFalse
|
|
|
2453 // ReSharper disable HeuristicUnreachableCode
|
|
|
2454 if (expr.Members == null)
|
|
|
2455 return false;
|
|
|
2456 // ReSharper restore HeuristicUnreachableCode
|
|
|
2457 // ReSharper restore ConditionIsAlwaysTrueOrFalse
|
|
|
2458
|
|
|
2459 for (var i = 0; i < expr.Members.Count; i++)
|
|
|
2460 {
|
|
|
2461 var member = expr.Members[i];
|
|
|
2462
|
|
|
2463 members.Add(member, expr.Arguments[i]);
|
|
|
2464
|
|
|
2465 if (member is MethodInfo)
|
|
|
2466 members.Add(TypeHelper.GetPropertyByMethod((MethodInfo)member), expr.Arguments[i]);
|
|
|
2467 }
|
|
|
2468
|
|
|
2469 return true;
|
|
|
2470 }
|
|
|
2471
|
|
|
2472 // new MyObject { ... }
|
|
|
2473 //
|
|
|
2474 case ExpressionType.MemberInit :
|
|
|
2475 {
|
|
|
2476 var expr = (MemberInitExpression)expression;
|
|
|
2477 var dic = TypeAccessor.GetAccessor(expr.Type)
|
|
|
2478 .Select((m,i) => new { m, i })
|
|
|
2479 .ToDictionary(_ => _.m.MemberInfo.Name, _ => _.i);
|
|
|
2480
|
|
|
2481 foreach (var binding in expr.Bindings.Cast<MemberAssignment>().OrderBy(b => dic.ContainsKey(b.Member.Name) ? dic[b.Member.Name] : 1000000))
|
|
|
2482 {
|
|
|
2483 members.Add(binding.Member, binding.Expression);
|
|
|
2484
|
|
|
2485 if (binding.Member is MethodInfo)
|
|
|
2486 members.Add(TypeHelper.GetPropertyByMethod((MethodInfo)binding.Member), binding.Expression);
|
|
|
2487 }
|
|
|
2488
|
|
|
2489 return true;
|
|
|
2490 }
|
|
|
2491
|
|
|
2492 // .Select(p => everything else)
|
|
|
2493 //
|
|
|
2494 default :
|
|
|
2495 return false;
|
|
|
2496 }
|
|
|
2497 }
|
|
|
2498
|
|
|
2499 public void ReplaceParent(IBuildContext oldParent, IBuildContext newParent)
|
|
|
2500 {
|
|
|
2501 foreach (var context in Contexts)
|
|
|
2502 if (context != newParent)
|
|
|
2503 if (context.Parent == oldParent)
|
|
|
2504 context.Parent = newParent;
|
|
|
2505 }
|
|
|
2506
|
|
|
2507 #endregion
|
|
|
2508 }
|
|
|
2509 }
|
