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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.Data;
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5 using System.Linq;
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6 using System.Linq.Expressions;
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7
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8 namespace BLToolkit.Data.Linq
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9 {
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10 using BLToolkit.Linq;
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11 using Common;
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12 using Data.Sql;
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13 using Data.Sql.SqlProvider;
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14 using Mapping;
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15 using Builder;
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16 using Reflection;
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17
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18 public abstract class Query
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19 {
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20 #region Init
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21
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22 public abstract void Init(IBuildContext parseContext, List<ParameterAccessor> sqlParameters);
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23
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24 #endregion
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25
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26 #region Compare
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27
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28 public string ContextID;
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29 public Expression Expression;
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30 public MappingSchema MappingSchema;
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31
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32 public bool Compare(string contextID, MappingSchema mappingSchema, Expression expr)
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33 {
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34 return
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35 ContextID.Length == contextID.Length &&
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36 ContextID == contextID &&
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37 MappingSchema == mappingSchema &&
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38 ExpressionHelper.Compare(Expression, expr, _queryableAccessorDic);
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39 }
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40
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41 readonly Dictionary<Expression,QueryableAccessor> _queryableAccessorDic = new Dictionary<Expression,QueryableAccessor>();
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42 readonly List<QueryableAccessor> _queryableAccessorList = new List<QueryableAccessor>();
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43
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44 internal int AddQueryableAccessors(Expression expr, Expression<Func<Expression,IQueryable>> qe)
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45 {
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46 QueryableAccessor e;
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47
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48 if (_queryableAccessorDic.TryGetValue(expr, out e))
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49 return _queryableAccessorList.IndexOf(e);
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50
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51 e = new QueryableAccessor { Accessor = qe.Compile() };
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52 e.Queryable = e.Accessor(expr);
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53
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54 _queryableAccessorDic. Add(expr, e);
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55 _queryableAccessorList.Add(e);
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56
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57 return _queryableAccessorList.Count - 1;
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58 }
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59
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60 public Expression GetIQueryable(int n, Expression expr)
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61 {
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62 return _queryableAccessorList[n].Accessor(expr).Expression;
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63 }
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64
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65 #endregion
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66 }
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67
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68 public class Query<T> : Query
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69 {
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70 public Query()
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71 {
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72 GetIEnumerable = MakeEnumerable;
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73 }
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74
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75 public override void Init(IBuildContext parseContext, List<ParameterAccessor> sqlParameters)
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76 {
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77 Queries.Add(new QueryInfo
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78 {
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79 SqlQuery = parseContext.SqlQuery,
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80 Parameters = sqlParameters,
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81 });
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82
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83 ContextID = parseContext.Builder.DataContextInfo.ContextID;
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84 MappingSchema = parseContext.Builder.MappingSchema;
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85 CreateSqlProvider = parseContext.Builder.DataContextInfo.CreateSqlProvider;
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86 Expression = parseContext.Builder.OriginalExpression;
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87 //Parameters = parameters;
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88 }
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89
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90 #region Properties & Fields
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91
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92 public Query<T> Next;
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93 public ParameterExpression[] CompiledParameters;
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94 public List<QueryInfo> Queries = new List<QueryInfo>(1);
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95 public Func<ISqlProvider> CreateSqlProvider;
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96
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97 private ISqlProvider _sqlProvider;
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98 public ISqlProvider SqlProvider
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99 {
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100 get { return _sqlProvider ?? (_sqlProvider = CreateSqlProvider()); }
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101 }
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102
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103 public Func<QueryContext,IDataContextInfo,Expression,object[],object> GetElement;
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104 public Func<QueryContext,IDataContextInfo,Expression,object[],IEnumerable<T>> GetIEnumerable;
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105
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106 IEnumerable<T> MakeEnumerable(QueryContext qc, IDataContextInfo dci, Expression expr, object[] ps)
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107 {
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108 yield return ConvertTo<T>.From(GetElement(qc, dci, expr, ps));
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109 }
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110
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111 #endregion
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112
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113 #region GetInfo
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114
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115 static Query<T> _first;
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116 static readonly object _sync = new object();
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117
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118 const int CacheSize = 100;
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119
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120 public static Query<T> GetQuery(IDataContextInfo dataContextInfo, Expression expr)
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121 {
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122 var query = FindQuery(dataContextInfo, expr);
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123
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124 if (query == null)
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125 {
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126 lock (_sync)
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127 {
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128 query = FindQuery(dataContextInfo, expr);
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129
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130 if (query == null)
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131 {
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132 if (Configuration.Linq.GenerateExpressionTest)
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133 {
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134 #if FW4 || SILVERLIGHT
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135 var testFile = new ExpressionTestGenerator().GenerateSource(expr);
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136 #else
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137 var testFile = "";
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138 #endif
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139
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140 #if !SILVERLIGHT
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141 DbManager.WriteTraceLine(
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142 "Expression test code generated: '" + testFile + "'.",
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143 DbManager.TraceSwitch.DisplayName);
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144 #endif
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145 }
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146
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147 try
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148 {
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149 query = new ExpressionBuilder(new Query<T>(), dataContextInfo, expr, null).Build<T>();
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150 }
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151 catch (Exception)
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152 {
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153 if (!Configuration.Linq.GenerateExpressionTest)
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154 {
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155 #if !SILVERLIGHT
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156 DbManager.WriteTraceLine(
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157 "To generate test code to diagnose the problem set 'BLToolkit.Common.Configuration.Linq.GenerateExpressionTest = true'.",
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158 DbManager.TraceSwitch.DisplayName);
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159 #endif
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160 }
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161
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162 throw;
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163 }
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164
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165 query.Next = _first;
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166 _first = query;
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167 }
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168 }
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169 }
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170
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171 return query;
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172 }
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173
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174 static Query<T> FindQuery(IDataContextInfo dataContextInfo, Expression expr)
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175 {
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176 Query<T> prev = null;
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177 var n = 0;
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178
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179 for (var query = _first; query != null; query = query.Next)
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180 {
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181 if (query.Compare(dataContextInfo.ContextID, dataContextInfo.MappingSchema, expr))
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182 {
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183 if (prev != null)
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184 {
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185 lock (_sync)
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186 {
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187 prev.Next = query.Next;
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188 query.Next = _first;
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189 _first = query;
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190 }
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191 }
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192
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193 return query;
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194 }
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195
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196 if (n++ >= CacheSize)
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197 {
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198 query.Next = null;
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199 return null;
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200 }
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201
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202 prev = query;
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203 }
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204
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205 return null;
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206 }
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207
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208 #endregion
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209
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210 #region NonQueryQuery
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211
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212 void FinalizeQuery()
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213 {
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214 foreach (var sql in Queries)
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215 {
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216 sql.SqlQuery = SqlProvider.Finalize(sql.SqlQuery);
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217 sql.Parameters = sql.Parameters
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218 .Select (p => new { p, idx = sql.SqlQuery.Parameters.IndexOf(p.SqlParameter) })
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219 .OrderBy(p => p.idx)
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220 .Select (p => p.p)
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221 .ToList();
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222 }
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223 }
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224
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225 public void SetNonQueryQuery()
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226 {
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227 FinalizeQuery();
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228
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229 if (Queries.Count != 1)
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230 throw new InvalidOperationException();
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231
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232 SqlProvider.SqlQuery = Queries[0].SqlQuery;
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233
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234 GetElement = (ctx,db,expr,ps) => NonQueryQuery(db, expr, ps);
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235 }
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236
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237 int NonQueryQuery(IDataContextInfo dataContextInfo, Expression expr, object[] parameters)
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238 {
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239 var dataContext = dataContextInfo.DataContext;
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240
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241 object query = null;
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242
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243 try
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244 {
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245 query = SetCommand(dataContext, expr, parameters, 0);
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246 return dataContext.ExecuteNonQuery(query);
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247 }
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248 finally
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249 {
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250 if (query != null)
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251 dataContext.ReleaseQuery(query);
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252
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253 if (dataContextInfo.DisposeContext)
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254 dataContext.Dispose();
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255 }
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256 }
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257
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258 public void SetNonQueryQuery2()
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259 {
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260 FinalizeQuery();
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261
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262 if (Queries.Count != 2)
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263 throw new InvalidOperationException();
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264
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265 SqlProvider.SqlQuery = Queries[0].SqlQuery;
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266
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267 GetElement = (ctx,db,expr,ps) => NonQueryQuery2(db, expr, ps);
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268 }
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269
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270 int NonQueryQuery2(IDataContextInfo dataContextInfo, Expression expr, object[] parameters)
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271 {
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272 var dataContext = dataContextInfo.DataContext;
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273
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274 object query = null;
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275
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276 try
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277 {
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278 query = SetCommand(dataContext, expr, parameters, 0);
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279
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280 var n = dataContext.ExecuteNonQuery(query);
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281
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282 if (n != 0)
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283 return n;
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284
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285 query = SetCommand(dataContext, expr, parameters, 1);
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286 return dataContext.ExecuteNonQuery(query);
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287 }
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288 finally
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289 {
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290 if (query != null)
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291 dataContext.ReleaseQuery(query);
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292
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293 if (dataContextInfo.DisposeContext)
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294 dataContext.Dispose();
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295 }
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296 }
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297
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298 #endregion
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299
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300 #region ScalarQuery
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301
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302 public void SetScalarQuery<TS>()
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303 {
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304 FinalizeQuery();
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305
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306 if (Queries.Count != 1)
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307 throw new InvalidOperationException();
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308
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309 SqlProvider.SqlQuery = Queries[0].SqlQuery;
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310
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311 GetElement = (ctx,db,expr,ps) => ScalarQuery<TS>(db, expr, ps);
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312 }
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313
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314 TS ScalarQuery<TS>(IDataContextInfo dataContextInfo, Expression expr, object[] parameters)
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315 {
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316 var dataContext = dataContextInfo.DataContext;
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317
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318 object query = null;
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319
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320 try
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321 {
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322 query = SetCommand(dataContext, expr, parameters, 0);
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323 return (TS)dataContext.ExecuteScalar(query);
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324 }
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325 finally
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326 {
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327 if (query != null)
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328 dataContext.ReleaseQuery(query);
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329
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330 if (dataContextInfo.DisposeContext)
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331 dataContext.Dispose();
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332 }
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333 }
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334
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335 #endregion
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336
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337 #region Query
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338
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339 int GetParameterIndex(ISqlExpression parameter)
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340 {
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341 for (var i = 0; i < Queries[0].Parameters.Count; i++)
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342 {
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343 var p = Queries[0].Parameters[i].SqlParameter;
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344
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345 if (p == parameter)
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346 return i;
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347 }
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348
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349 throw new InvalidOperationException();
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350 }
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351
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352 IEnumerable<IDataReader> RunQuery(IDataContextInfo dataContextInfo, Expression expr, object[] parameters, int queryNumber)
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353 {
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354 var dataContext = dataContextInfo.DataContext;
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355
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356 object query = null;
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357
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358 try
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359 {
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360 query = SetCommand(dataContext, expr, parameters, queryNumber);
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361
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362 using (var dr = dataContext.ExecuteReader(query))
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363 while (dr.Read())
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364 yield return dr;
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365 }
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366 finally
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367 {
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368 if (query != null)
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369 dataContext.ReleaseQuery(query);
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370
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371 if (dataContextInfo.DisposeContext)
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372 dataContext.Dispose();
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373 }
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374 }
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375
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376 object SetCommand(IDataContext dataContext, Expression expr, object[] parameters, int idx)
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377 {
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378 lock (this)
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379 {
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380 SetParameters(expr, parameters, idx);
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381 return dataContext.SetQuery(Queries[idx]);
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382 }
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383 }
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384
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385 void SetParameters(Expression expr, object[] parameters, int idx)
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386 {
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387 foreach (var p in Queries[idx].Parameters)
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388 {
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389 var value = p.Accessor(expr, parameters);
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390
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391 if (value is IEnumerable)
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392 {
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393 var type = value.GetType();
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394 var etype = TypeHelper.GetElementType(type);
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395
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396 if (etype == null || etype == typeof(object) ||
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397 etype.IsEnum ||
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398 (TypeHelper.IsNullableType(etype) && etype.GetGenericArguments()[0].IsEnum))
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399 {
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400 var values = new List<object>();
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401
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402 foreach (var v in (IEnumerable)value)
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403 {
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404 values.Add(v);
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405 // Enum mapping done by parameter itself
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406 //values.Add(v != null && v.GetType().IsEnum ?
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407 // MappingSchema.MapEnumToValue(v, true) :
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408 // v);
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409 }
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410
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411 value = values;
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412 }
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413 }
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414
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415 p.SqlParameter.Value = value;
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416 }
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417 }
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418
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419 #endregion
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420
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421 #region GetSqlText
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422
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423 public string GetSqlText(IDataContext dataContext, Expression expr, object[] parameters, int idx)
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424 {
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425 var query = SetCommand(dataContext, expr, parameters, 0);
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426 return dataContext.GetSqlText(query);
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427 }
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428
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429 #endregion
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430
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431 #region Inner Types
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432
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433 internal delegate TElement Mapper<TElement>(
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434 Query<T> query,
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435 QueryContext qc,
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436 IDataContext dc,
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437 IDataReader rd,
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438 MappingSchema ms,
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439 Expression expr,
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440 object[] ps);
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441
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442 public class QueryInfo : IQueryContext
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443 {
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444 public QueryInfo()
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445 {
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446 SqlQuery = new SqlQuery();
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447 }
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448
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449 public SqlQuery SqlQuery { get; set; }
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450 public object Context { get; set; }
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451
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452 public SqlParameter[] GetParameters()
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453 {
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454 var ps = new SqlParameter[Parameters.Count];
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455
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456 for (var i = 0; i < ps.Length; i++)
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457 ps[i] = Parameters[i].SqlParameter;
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458
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459 return ps;
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460 }
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461
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462 public List<ParameterAccessor> Parameters = new List<ParameterAccessor>();
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463 }
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464
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465 #endregion
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466
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467 #region Object Operations
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468
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469 static class ObjectOperation<T1>
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470 {
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471 public static readonly Dictionary<object,Query<int>> Insert = new Dictionary<object,Query<int>>();
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472 public static readonly Dictionary<object,Query<object>> InsertWithIdentity = new Dictionary<object,Query<object>>();
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473 public static readonly Dictionary<object,Query<int>> InsertOrUpdate = new Dictionary<object,Query<int>>();
|
|
|
474 public static readonly Dictionary<object,Query<int>> Update = new Dictionary<object,Query<int>>();
|
|
|
475 public static readonly Dictionary<object,Query<int>> Delete = new Dictionary<object,Query<int>>();
|
|
|
476 }
|
|
|
477
|
|
|
478 static object ConvertNullable<TT>(TT value, TT defaultValue)
|
|
|
479 where TT : struct
|
|
|
480 {
|
|
|
481 return value.Equals(defaultValue) ? null : (object)value;
|
|
|
482 }
|
|
|
483
|
|
|
484 static ParameterAccessor GetParameter<TR>(IDataContext dataContext, SqlField field)
|
|
|
485 {
|
|
|
486 var exprParam = Expression.Parameter(typeof(Expression), "expr");
|
|
|
487
|
|
|
488 Expression getter = Expression.Convert(
|
|
|
489 Expression.Property(
|
|
|
490 Expression.Convert(exprParam, typeof(ConstantExpression)),
|
|
|
491 ReflectionHelper.Constant.Value),
|
|
|
492 typeof(T));
|
|
|
493
|
|
|
494 var mm = field.MemberMapper;
|
|
|
495 var members = mm.MemberName.Split('.');
|
|
|
496 var defValue = Expression.Constant(
|
|
|
497 mm.MapMemberInfo.DefaultValue ?? TypeHelper.GetDefaultValue(mm.MapMemberInfo.Type),
|
|
|
498 mm.MapMemberInfo.Type);
|
|
|
499
|
|
|
500 for (var i = 0; i < members.Length; i++)
|
|
|
501 {
|
|
|
502 var member = members[i];
|
|
|
503 var pof = Expression.PropertyOrField(getter, member) as Expression;
|
|
|
504
|
|
|
505 if (i == 0)
|
|
|
506 {
|
|
|
507 if (members.Length == 1 && mm.IsExplicit)
|
|
|
508 {
|
|
|
509 if (getter.Type != typeof(object))
|
|
|
510 getter = Expression.Convert(getter, typeof(object));
|
|
|
511
|
|
|
512 pof = Expression.Call(
|
|
|
513 Expression.Constant(mm),
|
|
|
514 ReflectionHelper.Expressor<MemberMapper>.MethodExpressor(m => m.GetValue(null)),
|
|
|
515 getter);
|
|
|
516 }
|
|
|
517
|
|
|
518 getter = pof;
|
|
|
519 }
|
|
|
520 else
|
|
|
521 {
|
|
|
522 getter = Expression.Condition(Expression.Equal(getter, Expression.Constant(null)), defValue, pof);
|
|
|
523 }
|
|
|
524 }
|
|
|
525
|
|
|
526 if (!mm.Type.IsClass && !mm.Type.IsInterface && mm.MapMemberInfo.Nullable && !TypeHelper.IsNullableType(mm.Type))
|
|
|
527 {
|
|
|
528 var method = ReflectionHelper.Expressor<int>.MethodExpressor(_ => ConvertNullable(0, 0))
|
|
|
529 .GetGenericMethodDefinition()
|
|
|
530 .MakeGenericMethod(mm.Type);
|
|
|
531
|
|
|
532 getter = Expression.Call(null, method, getter, Expression.Constant(mm.MapMemberInfo.NullValue));
|
|
|
533 }
|
|
|
534 else
|
|
|
535 {
|
|
|
536 if (getter.Type != typeof(object))
|
|
|
537 getter = Expression.Convert(getter, typeof(object));
|
|
|
538 }
|
|
|
539
|
|
|
540 var mapper = Expression.Lambda<Func<Expression,object[],object>>(
|
|
|
541 getter,
|
|
|
542 new [] { exprParam, Expression.Parameter(typeof(object[]), "ps") });
|
|
|
543
|
|
|
544 var param = new ParameterAccessor
|
|
|
545 {
|
|
|
546 Expression = null,
|
|
|
547 Accessor = mapper.Compile(),
|
|
|
548 SqlParameter = new SqlParameter(field.SystemType, field.Name.Replace('.', '_'), null, dataContext.MappingSchema)
|
|
|
549 };
|
|
|
550
|
|
|
551 if (TypeHelper.IsEnumOrNullableEnum(field.SystemType))
|
|
|
552 {
|
|
|
553 param.SqlParameter.SetEnumConverter(field.MemberMapper.ComplexMemberAccessor, dataContext.MappingSchema);
|
|
|
554 }
|
|
|
555
|
|
|
556 return param;
|
|
|
557 }
|
|
|
558
|
|
|
559 #region Insert
|
|
|
560
|
|
|
561 public static int Insert(IDataContextInfo dataContextInfo, T obj)
|
|
|
562 {
|
|
|
563 if (Equals(default(T), obj))
|
|
|
564 return 0;
|
|
|
565
|
|
|
566 Query<int> ei;
|
|
|
567
|
|
|
568 var key = new { dataContextInfo.MappingSchema, dataContextInfo.ContextID };
|
|
|
569
|
|
|
570 if (!ObjectOperation<T>.Insert.TryGetValue(key, out ei))
|
|
|
571 lock (_sync)
|
|
|
572 if (!ObjectOperation<T>.Insert.TryGetValue(key, out ei))
|
|
|
573 {
|
|
|
574 var sqlTable = new SqlTable<T>(dataContextInfo.MappingSchema);
|
|
|
575 var sqlQuery = new SqlQuery { QueryType = QueryType.Insert };
|
|
|
576
|
|
|
577 sqlQuery.Insert.Into = sqlTable;
|
|
|
578
|
|
|
579 ei = new Query<int>
|
|
|
580 {
|
|
|
581 MappingSchema = dataContextInfo.MappingSchema,
|
|
|
582 ContextID = dataContextInfo.ContextID,
|
|
|
583 CreateSqlProvider = dataContextInfo.CreateSqlProvider,
|
|
|
584 Queries = { new Query<int>.QueryInfo { SqlQuery = sqlQuery, } }
|
|
|
585 };
|
|
|
586
|
|
|
587 foreach (var field in sqlTable.Fields)
|
|
|
588 {
|
|
|
589 if (field.Value.IsInsertable)
|
|
|
590 {
|
|
|
591 var param = GetParameter<int>(dataContextInfo.DataContext, field.Value);
|
|
|
592
|
|
|
593 ei.Queries[0].Parameters.Add(param);
|
|
|
594
|
|
|
595 sqlQuery.Insert.Items.Add(new SqlQuery.SetExpression(field.Value, param.SqlParameter));
|
|
|
596 }
|
|
|
597 else if (field.Value.IsIdentity)
|
|
|
598 {
|
|
|
599 var expr = ei.SqlProvider.GetIdentityExpression(sqlTable, field.Value, false);
|
|
|
600
|
|
|
601 if (expr != null)
|
|
|
602 sqlQuery.Insert.Items.Add(new SqlQuery.SetExpression(field.Value, expr));
|
|
|
603 }
|
|
|
604 }
|
|
|
605
|
|
|
606 ei.SetNonQueryQuery();
|
|
|
607
|
|
|
608 ObjectOperation<T>.Insert.Add(key, ei);
|
|
|
609 }
|
|
|
610
|
|
|
611 return (int)ei.GetElement(null, dataContextInfo, Expression.Constant(obj), null);
|
|
|
612 }
|
|
|
613
|
|
|
614 #endregion
|
|
|
615
|
|
|
616 #region InsertWithIdentity
|
|
|
617
|
|
|
618 public static object InsertWithIdentity(IDataContextInfo dataContextInfo, T obj)
|
|
|
619 {
|
|
|
620 if (Equals(default(T), obj))
|
|
|
621 return 0;
|
|
|
622
|
|
|
623 Query<object> ei;
|
|
|
624
|
|
|
625 var key = new { dataContextInfo.MappingSchema, dataContextInfo.ContextID };
|
|
|
626
|
|
|
627 if (!ObjectOperation<T>.InsertWithIdentity.TryGetValue(key, out ei))
|
|
|
628 lock (_sync)
|
|
|
629 if (!ObjectOperation<T>.InsertWithIdentity.TryGetValue(key, out ei))
|
|
|
630 {
|
|
|
631 var sqlTable = new SqlTable<T>(dataContextInfo.MappingSchema);
|
|
|
632 var sqlQuery = new SqlQuery { QueryType = QueryType.Insert };
|
|
|
633
|
|
|
634 sqlQuery.Insert.Into = sqlTable;
|
|
|
635 sqlQuery.Insert.WithIdentity = true;
|
|
|
636
|
|
|
637 ei = new Query<object>
|
|
|
638 {
|
|
|
639 MappingSchema = dataContextInfo.MappingSchema,
|
|
|
640 ContextID = dataContextInfo.ContextID,
|
|
|
641 CreateSqlProvider = dataContextInfo.CreateSqlProvider,
|
|
|
642 Queries = { new Query<object>.QueryInfo { SqlQuery = sqlQuery, } }
|
|
|
643 };
|
|
|
644
|
|
|
645 foreach (var field in sqlTable.Fields)
|
|
|
646 {
|
|
|
647 if (field.Value.IsInsertable)
|
|
|
648 {
|
|
|
649 var param = GetParameter<object>(dataContextInfo.DataContext, field.Value);
|
|
|
650
|
|
|
651 ei.Queries[0].Parameters.Add(param);
|
|
|
652
|
|
|
653 sqlQuery.Insert.Items.Add(new SqlQuery.SetExpression(field.Value, param.SqlParameter));
|
|
|
654 }
|
|
|
655 else if (field.Value.IsIdentity)
|
|
|
656 {
|
|
|
657 var expr = ei.SqlProvider.GetIdentityExpression(sqlTable, field.Value, true);
|
|
|
658
|
|
|
659 if (expr != null)
|
|
|
660 sqlQuery.Insert.Items.Add(new SqlQuery.SetExpression(field.Value, expr));
|
|
|
661 }
|
|
|
662 }
|
|
|
663
|
|
|
664 ei.SetScalarQuery<object>();
|
|
|
665
|
|
|
666 ObjectOperation<T>.InsertWithIdentity.Add(key, ei);
|
|
|
667 }
|
|
|
668
|
|
|
669 return ei.GetElement(null, dataContextInfo, Expression.Constant(obj), null);
|
|
|
670 }
|
|
|
671
|
|
|
672 #endregion
|
|
|
673
|
|
|
674 #region InsertOrReplace
|
|
|
675
|
|
|
676 [Obsolete("Use 'InsertOrReplace' instead.")]
|
|
|
677 public static int InsertOrUpdate(IDataContextInfo dataContextInfo, T obj)
|
|
|
678 {
|
|
|
679 return InsertOrReplace(dataContextInfo, obj);
|
|
|
680 }
|
|
|
681
|
|
|
682 public static int InsertOrReplace(IDataContextInfo dataContextInfo, T obj)
|
|
|
683 {
|
|
|
684 if (Equals(default(T), obj))
|
|
|
685 return 0;
|
|
|
686
|
|
|
687 Query<int> ei;
|
|
|
688
|
|
|
689 var key = new { dataContextInfo.MappingSchema, dataContextInfo.ContextID };
|
|
|
690
|
|
|
691 if (!ObjectOperation<T>.InsertOrUpdate.TryGetValue(key, out ei))
|
|
|
692 {
|
|
|
693 lock (_sync)
|
|
|
694 {
|
|
|
695 if (!ObjectOperation<T>.InsertOrUpdate.TryGetValue(key, out ei))
|
|
|
696 {
|
|
|
697 var fieldDic = new Dictionary<SqlField, ParameterAccessor>();
|
|
|
698 var sqlTable = new SqlTable<T>(dataContextInfo.MappingSchema);
|
|
|
699 var sqlQuery = new SqlQuery { QueryType = QueryType.InsertOrUpdate };
|
|
|
700
|
|
|
701 ParameterAccessor param;
|
|
|
702
|
|
|
703 sqlQuery.Insert.Into = sqlTable;
|
|
|
704 sqlQuery.Update.Table = sqlTable;
|
|
|
705
|
|
|
706 sqlQuery.From.Table(sqlTable);
|
|
|
707
|
|
|
708 ei = new Query<int>
|
|
|
709 {
|
|
|
710 MappingSchema = dataContextInfo.MappingSchema,
|
|
|
711 ContextID = dataContextInfo.ContextID,
|
|
|
712 CreateSqlProvider = dataContextInfo.CreateSqlProvider,
|
|
|
713 Queries = { new Query<int>.QueryInfo { SqlQuery = sqlQuery, } }
|
|
|
714 };
|
|
|
715
|
|
|
716 var supported = ei.SqlProvider.IsInsertOrUpdateSupported && ei.SqlProvider.CanCombineParameters;
|
|
|
717
|
|
|
718 // Insert.
|
|
|
719 //
|
|
|
720 foreach (var field in sqlTable.Fields.Select(f => f.Value))
|
|
|
721 {
|
|
|
722 if (field.IsInsertable)
|
|
|
723 {
|
|
|
724 if (!supported || !fieldDic.TryGetValue(field, out param))
|
|
|
725 {
|
|
|
726 param = GetParameter<int>(dataContextInfo.DataContext, field);
|
|
|
727 ei.Queries[0].Parameters.Add(param);
|
|
|
728
|
|
|
729 if (supported)
|
|
|
730 fieldDic.Add(field, param);
|
|
|
731 }
|
|
|
732
|
|
|
733 sqlQuery.Insert.Items.Add(new SqlQuery.SetExpression(field, param.SqlParameter));
|
|
|
734 }
|
|
|
735 else if (field.IsIdentity)
|
|
|
736 {
|
|
|
737 throw new LinqException("InsertOrUpdate method does not support identity field '{0}.{1}'.", sqlTable.Name, field.Name);
|
|
|
738 }
|
|
|
739 }
|
|
|
740
|
|
|
741 // Update.
|
|
|
742 //
|
|
|
743 var keys = sqlTable.GetKeys(true).Cast<SqlField>().ToList();
|
|
|
744 var fields = sqlTable.Fields.Values.Where(f => f.IsUpdatable).Except(keys).ToList();
|
|
|
745
|
|
|
746 if (keys.Count == 0)
|
|
|
747 throw new LinqException("InsertOrUpdate method requires the '{0}' table to have a primary key.", sqlTable.Name);
|
|
|
748
|
|
|
749 var q =
|
|
|
750 (
|
|
|
751 from k in keys
|
|
|
752 join i in sqlQuery.Insert.Items on k equals i.Column
|
|
|
753 select new { k, i }
|
|
|
754 ).ToList();
|
|
|
755
|
|
|
756 var missedKey = keys.Except(q.Select(i => i.k)).FirstOrDefault();
|
|
|
757
|
|
|
758 if (missedKey != null)
|
|
|
759 throw new LinqException("InsertOrUpdate method requires the '{0}.{1}' field to be included in the insert setter.",
|
|
|
760 sqlTable.Name,
|
|
|
761 missedKey.Name);
|
|
|
762
|
|
|
763 if (fields.Count == 0)
|
|
|
764 throw new LinqException(
|
|
|
765 string.Format("There are no fields to update in the type '{0}'.", sqlTable.Name));
|
|
|
766
|
|
|
767 foreach (var field in fields)
|
|
|
768 {
|
|
|
769 if (!supported || !fieldDic.TryGetValue(field, out param))
|
|
|
770 {
|
|
|
771 param = GetParameter<int>(dataContextInfo.DataContext, field);
|
|
|
772 ei.Queries[0].Parameters.Add(param);
|
|
|
773
|
|
|
774 if (supported)
|
|
|
775 fieldDic.Add(field, param = GetParameter<int>(dataContextInfo.DataContext, field));
|
|
|
776 }
|
|
|
777
|
|
|
778 sqlQuery.Update.Items.Add(new SqlQuery.SetExpression(field, param.SqlParameter));
|
|
|
779 }
|
|
|
780
|
|
|
781 sqlQuery.Update.Keys.AddRange(q.Select(i => i.i));
|
|
|
782
|
|
|
783 // Set the query.
|
|
|
784 //
|
|
|
785 if (ei.SqlProvider.IsInsertOrUpdateSupported)
|
|
|
786 ei.SetNonQueryQuery();
|
|
|
787 else
|
|
|
788 ei.MakeAlternativeInsertOrUpdate(sqlQuery);
|
|
|
789
|
|
|
790 ObjectOperation<T>.InsertOrUpdate.Add(key, ei);
|
|
|
791 }
|
|
|
792 }
|
|
|
793 }
|
|
|
794
|
|
|
795 return (int)ei.GetElement(null, dataContextInfo, Expression.Constant(obj), null);
|
|
|
796 }
|
|
|
797
|
|
|
798 internal void MakeAlternativeInsertOrUpdate(SqlQuery sqlQuery)
|
|
|
799 {
|
|
|
800 var dic = new Dictionary<ICloneableElement,ICloneableElement>();
|
|
|
801
|
|
|
802 var insertQuery = (SqlQuery)sqlQuery.Clone(dic, _ => true);
|
|
|
803
|
|
|
804 insertQuery.QueryType = QueryType.Insert;
|
|
|
805 insertQuery.ClearUpdate();
|
|
|
806 insertQuery.From.Tables.Clear();
|
|
|
807
|
|
|
808 Queries.Add(new QueryInfo
|
|
|
809 {
|
|
|
810 SqlQuery = insertQuery,
|
|
|
811 Parameters = Queries[0].Parameters
|
|
|
812 .Select(p => new ParameterAccessor
|
|
|
813 {
|
|
|
814 Expression = p.Expression,
|
|
|
815 Accessor = p.Accessor,
|
|
|
816 SqlParameter = dic.ContainsKey(p.SqlParameter) ? (SqlParameter)dic[p.SqlParameter] : null
|
|
|
817 })
|
|
|
818 .Where(p => p.SqlParameter != null)
|
|
|
819 .ToList(),
|
|
|
820 });
|
|
|
821
|
|
|
822 var keys = sqlQuery.Update.Keys;
|
|
|
823
|
|
|
824 foreach (var key in keys)
|
|
|
825 sqlQuery.Where.Expr(key.Column).Equal.Expr(key.Expression);
|
|
|
826
|
|
|
827 sqlQuery.QueryType = QueryType.Update;
|
|
|
828 sqlQuery.ClearInsert();
|
|
|
829
|
|
|
830 SetNonQueryQuery2();
|
|
|
831
|
|
|
832 Queries.Add(new QueryInfo
|
|
|
833 {
|
|
|
834 SqlQuery = insertQuery,
|
|
|
835 Parameters = Queries[0].Parameters.ToList(),
|
|
|
836 });
|
|
|
837 }
|
|
|
838
|
|
|
839 #endregion
|
|
|
840
|
|
|
841 #region Update
|
|
|
842
|
|
|
843 public static int Update(IDataContextInfo dataContextInfo, T obj)
|
|
|
844 {
|
|
|
845 if (Equals(default(T), obj))
|
|
|
846 return 0;
|
|
|
847
|
|
|
848 Query<int> ei;
|
|
|
849
|
|
|
850 var key = new { dataContextInfo.MappingSchema, dataContextInfo.ContextID };
|
|
|
851
|
|
|
852 if (!ObjectOperation<T>.Update.TryGetValue(key, out ei))
|
|
|
853 lock (_sync)
|
|
|
854 if (!ObjectOperation<T>.Update.TryGetValue(key, out ei))
|
|
|
855 {
|
|
|
856 var sqlTable = new SqlTable<T>(dataContextInfo.MappingSchema);
|
|
|
857 var sqlQuery = new SqlQuery { QueryType = QueryType.Update };
|
|
|
858
|
|
|
859 sqlQuery.From.Table(sqlTable);
|
|
|
860
|
|
|
861 ei = new Query<int>
|
|
|
862 {
|
|
|
863 MappingSchema = dataContextInfo.MappingSchema,
|
|
|
864 ContextID = dataContextInfo.ContextID,
|
|
|
865 CreateSqlProvider = dataContextInfo.CreateSqlProvider,
|
|
|
866 Queries = { new Query<int>.QueryInfo { SqlQuery = sqlQuery, } }
|
|
|
867 };
|
|
|
868
|
|
|
869 var keys = sqlTable.GetKeys(true).Cast<SqlField>();
|
|
|
870 var fields = sqlTable.Fields.Values.Where(f => f.IsUpdatable).Except(keys).ToList();
|
|
|
871
|
|
|
872 if (fields.Count == 0)
|
|
|
873 {
|
|
|
874 if (Configuration.Linq.IgnoreEmptyUpdate)
|
|
|
875 return 0;
|
|
|
876
|
|
|
877 throw new LinqException(
|
|
|
878 string.Format("There are no fields to update in the type '{0}'.", sqlTable.Name));
|
|
|
879 }
|
|
|
880
|
|
|
881 foreach (var field in fields)
|
|
|
882 {
|
|
|
883 var param = GetParameter<int>(dataContextInfo.DataContext, field);
|
|
|
884
|
|
|
885 ei.Queries[0].Parameters.Add(param);
|
|
|
886
|
|
|
887 sqlQuery.Update.Items.Add(new SqlQuery.SetExpression(field, param.SqlParameter));
|
|
|
888 }
|
|
|
889
|
|
|
890 foreach (var field in keys)
|
|
|
891 {
|
|
|
892 var param = GetParameter<int>(dataContextInfo.DataContext, field);
|
|
|
893
|
|
|
894 ei.Queries[0].Parameters.Add(param);
|
|
|
895
|
|
|
896 sqlQuery.Where.Field(field).Equal.Expr(param.SqlParameter);
|
|
|
897
|
|
|
898 if (field.Nullable)
|
|
|
899 sqlQuery.IsParameterDependent = true;
|
|
|
900 }
|
|
|
901
|
|
|
902 ei.SetNonQueryQuery();
|
|
|
903
|
|
|
904 ObjectOperation<T>.Update.Add(key, ei);
|
|
|
905 }
|
|
|
906
|
|
|
907 return (int)ei.GetElement(null, dataContextInfo, Expression.Constant(obj), null);
|
|
|
908 }
|
|
|
909
|
|
|
910 #endregion
|
|
|
911
|
|
|
912 #region Delete
|
|
|
913
|
|
|
914 public static int Delete(IDataContextInfo dataContextInfo, T obj)
|
|
|
915 {
|
|
|
916 if (Equals(default(T), obj))
|
|
|
917 return 0;
|
|
|
918
|
|
|
919 Query<int> ei;
|
|
|
920
|
|
|
921 var key = new { dataContextInfo.MappingSchema, dataContextInfo.ContextID };
|
|
|
922
|
|
|
923 if (!ObjectOperation<T>.Delete.TryGetValue(key, out ei))
|
|
|
924 lock (_sync)
|
|
|
925 if (!ObjectOperation<T>.Delete.TryGetValue(key, out ei))
|
|
|
926 {
|
|
|
927 var sqlTable = new SqlTable<T>(dataContextInfo.MappingSchema);
|
|
|
928 var sqlQuery = new SqlQuery { QueryType = QueryType.Delete };
|
|
|
929
|
|
|
930 sqlQuery.From.Table(sqlTable);
|
|
|
931
|
|
|
932 ei = new Query<int>
|
|
|
933 {
|
|
|
934 MappingSchema = dataContextInfo.MappingSchema,
|
|
|
935 ContextID = dataContextInfo.ContextID,
|
|
|
936 CreateSqlProvider = dataContextInfo.CreateSqlProvider,
|
|
|
937 Queries = { new Query<int>.QueryInfo { SqlQuery = sqlQuery, } }
|
|
|
938 };
|
|
|
939
|
|
|
940 var keys = sqlTable.GetKeys(true).Cast<SqlField>().ToList();
|
|
|
941
|
|
|
942 if (keys.Count == 0)
|
|
|
943 throw new LinqException(
|
|
|
944 string.Format("Table '{0}' does not have primary key.", sqlTable.Name));
|
|
|
945
|
|
|
946 foreach (var field in keys)
|
|
|
947 {
|
|
|
948 var param = GetParameter<int>(dataContextInfo.DataContext, field);
|
|
|
949
|
|
|
950 ei.Queries[0].Parameters.Add(param);
|
|
|
951
|
|
|
952 sqlQuery.Where.Field(field).Equal.Expr(param.SqlParameter);
|
|
|
953
|
|
|
954 if (field.Nullable)
|
|
|
955 sqlQuery.IsParameterDependent = true;
|
|
|
956 }
|
|
|
957
|
|
|
958 ei.SetNonQueryQuery();
|
|
|
959
|
|
|
960 ObjectOperation<T>.Delete.Add(key, ei);
|
|
|
961 }
|
|
|
962
|
|
|
963 return (int)ei.GetElement(null, dataContextInfo, Expression.Constant(obj), null);
|
|
|
964 }
|
|
|
965
|
|
|
966 #endregion
|
|
|
967
|
|
|
968 #endregion
|
|
|
969
|
|
|
970 #region New Builder Support
|
|
|
971
|
|
|
972 public void SetElementQuery(Func<QueryContext,IDataContext,IDataReader,Expression,object[],object> mapper)
|
|
|
973 {
|
|
|
974 FinalizeQuery();
|
|
|
975
|
|
|
976 if (Queries.Count != 1)
|
|
|
977 throw new InvalidOperationException();
|
|
|
978
|
|
|
979 SqlProvider.SqlQuery = Queries[0].SqlQuery;
|
|
|
980
|
|
|
981 GetElement = (ctx,db,expr,ps) => RunQuery(ctx, db,expr, ps, mapper);
|
|
|
982 }
|
|
|
983
|
|
|
984 TE RunQuery<TE>(
|
|
|
985 QueryContext ctx,
|
|
|
986 IDataContextInfo dataContextInfo,
|
|
|
987 Expression expr,
|
|
|
988 object[] parameters,
|
|
|
989 Func<QueryContext,IDataContext,IDataReader,Expression,object[],TE> mapper)
|
|
|
990 {
|
|
|
991 var dataContext = dataContextInfo.DataContext;
|
|
|
992
|
|
|
993 object query = null;
|
|
|
994
|
|
|
995 try
|
|
|
996 {
|
|
|
997 query = SetCommand(dataContext, expr, parameters, 0);
|
|
|
998
|
|
|
999 using (var dr = dataContext.ExecuteReader(query))
|
|
|
1000 while (dr.Read())
|
|
|
1001 return mapper(ctx, dataContext, dr, expr, parameters);
|
|
|
1002
|
|
|
1003 return Array<TE>.Empty.First();
|
|
|
1004 }
|
|
|
1005 finally
|
|
|
1006 {
|
|
|
1007 if (query != null)
|
|
|
1008 dataContext.ReleaseQuery(query);
|
|
|
1009
|
|
|
1010 if (dataContextInfo.DisposeContext)
|
|
|
1011 dataContext.Dispose();
|
|
|
1012 }
|
|
|
1013 }
|
|
|
1014
|
|
|
1015 Func<IDataContextInfo,Expression,object[],int,IEnumerable<IDataReader>> GetQuery()
|
|
|
1016 {
|
|
|
1017 FinalizeQuery();
|
|
|
1018
|
|
|
1019 if (Queries.Count != 1)
|
|
|
1020 throw new InvalidOperationException();
|
|
|
1021
|
|
|
1022 Func<IDataContextInfo,Expression,object[],int,IEnumerable<IDataReader>> query = RunQuery;
|
|
|
1023
|
|
|
1024 SqlProvider.SqlQuery = Queries[0].SqlQuery;
|
|
|
1025
|
|
|
1026 var select = Queries[0].SqlQuery.Select;
|
|
|
1027
|
|
|
1028 if (select.SkipValue != null && !SqlProvider.IsSkipSupported)
|
|
|
1029 {
|
|
|
1030 var q = query;
|
|
|
1031
|
|
|
1032 if (select.SkipValue is SqlValue)
|
|
|
1033 {
|
|
|
1034 var n = (int)((IValueContainer)select.SkipValue).Value;
|
|
|
1035
|
|
|
1036 if (n > 0)
|
|
|
1037 query = (db, expr, ps, qn) => q(db, expr, ps, qn).Skip(n);
|
|
|
1038 }
|
|
|
1039 else if (select.SkipValue is SqlParameter)
|
|
|
1040 {
|
|
|
1041 var i = GetParameterIndex(select.SkipValue);
|
|
|
1042 query = (db, expr, ps, qn) => q(db, expr, ps, qn).Skip((int)Queries[0].Parameters[i].Accessor(expr, ps));
|
|
|
1043 }
|
|
|
1044 }
|
|
|
1045
|
|
|
1046 if (select.TakeValue != null && !SqlProvider.IsTakeSupported)
|
|
|
1047 {
|
|
|
1048 var q = query;
|
|
|
1049
|
|
|
1050 if (select.TakeValue is SqlValue)
|
|
|
1051 {
|
|
|
1052 var n = (int)((IValueContainer)select.TakeValue).Value;
|
|
|
1053
|
|
|
1054 if (n > 0)
|
|
|
1055 query = (db, expr, ps, qn) => q(db, expr, ps, qn).Take(n);
|
|
|
1056 }
|
|
|
1057 else if (select.TakeValue is SqlParameter)
|
|
|
1058 {
|
|
|
1059 var i = GetParameterIndex(select.TakeValue);
|
|
|
1060 query = (db, expr, ps, qn) => q(db, expr, ps, qn).Take((int)Queries[0].Parameters[i].Accessor(expr, ps));
|
|
|
1061 }
|
|
|
1062 }
|
|
|
1063
|
|
|
1064 return query;
|
|
|
1065 }
|
|
|
1066
|
|
|
1067 internal void SetQuery(Func<QueryContext,IDataContext,IDataReader,Expression,object[],T> mapper)
|
|
|
1068 {
|
|
|
1069 var query = GetQuery();
|
|
|
1070 GetIEnumerable = (ctx,db,expr,ps) => Map(query(db, expr, ps, 0), ctx, db, expr, ps, mapper);
|
|
|
1071 }
|
|
|
1072
|
|
|
1073 static IEnumerable<T> Map(
|
|
|
1074 IEnumerable<IDataReader> data,
|
|
|
1075 QueryContext queryContext,
|
|
|
1076 IDataContextInfo dataContextInfo,
|
|
|
1077 Expression expr,
|
|
|
1078 object[] ps,
|
|
|
1079 Func<QueryContext,IDataContext,IDataReader,Expression,object[],T> mapper)
|
|
|
1080 {
|
|
|
1081 if (queryContext == null)
|
|
|
1082 queryContext = new QueryContext(dataContextInfo, expr, ps);
|
|
|
1083
|
|
|
1084 foreach (var dr in data)
|
|
|
1085 yield return mapper(queryContext, dataContextInfo.DataContext, dr, expr, ps);
|
|
|
1086 }
|
|
|
1087
|
|
|
1088 internal void SetQuery(Func<QueryContext,IDataContext,IDataReader,Expression,object[],int,T> mapper)
|
|
|
1089 {
|
|
|
1090 var query = GetQuery();
|
|
|
1091 GetIEnumerable = (ctx,db,expr,ps) => Map(query(db, expr, ps, 0), ctx, db, expr, ps, mapper);
|
|
|
1092 }
|
|
|
1093
|
|
|
1094 static IEnumerable<T> Map(
|
|
|
1095 IEnumerable<IDataReader> data,
|
|
|
1096 QueryContext queryContext,
|
|
|
1097 IDataContextInfo dataContextInfo,
|
|
|
1098 Expression expr,
|
|
|
1099 object[] ps,
|
|
|
1100 Func<QueryContext,IDataContext,IDataReader,Expression,object[],int,T> mapper)
|
|
|
1101 {
|
|
|
1102 if (queryContext == null)
|
|
|
1103 queryContext = new QueryContext(dataContextInfo, expr, ps);
|
|
|
1104
|
|
|
1105 var counter = 0;
|
|
|
1106
|
|
|
1107 foreach (var dr in data)
|
|
|
1108 yield return mapper(queryContext, dataContextInfo.DataContext, dr, expr, ps, counter++);
|
|
|
1109 }
|
|
|
1110
|
|
|
1111 #endregion
|
|
|
1112 }
|
|
|
1113
|
|
|
1114 public class ParameterAccessor
|
|
|
1115 {
|
|
|
1116 public Expression Expression;
|
|
|
1117 public Func<Expression,object[],object> Accessor;
|
|
|
1118 public SqlParameter SqlParameter;
|
|
|
1119 }
|
|
|
1120 }
|
