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1 using System;
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2 using System.Collections.Generic;
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3 using System.Data;
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4 using System.Linq;
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5 using System.Text;
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6 using BLToolkit.Data.Sql.SqlProvider;
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7 using BLToolkit.DataAccess;
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8 using BLToolkit.Mapping;
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9
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10 namespace BLToolkit.Data.DataProvider.Interpreters
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11 {
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12 public class OracleDataProviderInterpreter : DataProviderInterpreterBase
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13 {
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14 public override void SetParameterValue(IDbDataParameter parameter, object value)
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15 {
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16 if (value is TimeSpan)
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17 {
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18 parameter.Value = ((TimeSpan)value).ToString();
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19 }
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20 else
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21 base.SetParameterValue(parameter, value);
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22 }
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23
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24 public override List<string> GetInsertBatchSqlList<T>(
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25 string insertText,
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26 IEnumerable<T> collection,
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27 MemberMapper[] members,
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28 int maxBatchSize,
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29 bool withIdentity)
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30 {
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31 //return GetInsertBatchSqlListWithInsertAll(insertText, collection, members, maxBatchSize);
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32 return GetInsertBatchSqlListUnionAll(insertText, collection, members, maxBatchSize, withIdentity);
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33 }
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34
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35 private List<string> GetInsertBatchSqlListUnionAll<T>(
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36 string insertText,
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37 IEnumerable<T> collection,
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38 MemberMapper[] members,
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39 int maxBatchSize,
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40 bool withIdentity)
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41 {
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42 var sp = new OracleSqlProvider();
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43 var n = 0;
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44 var sqlList = new List<string>();
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45
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46 var indexValuesWord = insertText.IndexOf(" VALUES (", StringComparison.Ordinal);
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47 var initQuery = insertText.Substring(0, indexValuesWord) + Environment.NewLine;
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48 var valuesQuery = insertText.Substring(indexValuesWord + 9);
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49 var indexEndValuesQuery = valuesQuery.IndexOf(")");
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50 valuesQuery = valuesQuery.Substring(0, indexEndValuesQuery)
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51 .Replace("\r", "")
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52 .Replace("\n", "")
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53 .Replace("\t", "");
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54
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55 // 1 = Number of primary keys generated by sequence
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56 var valuesWihtoutSequence = withIdentity ? valuesQuery.Substring(valuesQuery.IndexOf(",") + 1) : valuesQuery;
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57
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58 var sb = new StringBuilder(initQuery);
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59 sb.Append(" SELECT ");
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60 sb.AppendFormat(valuesQuery, members.Select(m => m.Name).ToArray());
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61 sb.AppendLine(" FROM (");
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62
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63 initQuery = sb.ToString();
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64
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65 sb = new StringBuilder(initQuery);
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66 bool isFirstValues = true;
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67
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68 foreach (var item in collection)
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69 {
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70 if (!isFirstValues)
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71 sb.AppendLine(" UNION ALL ");
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72
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73 sb.Append("SELECT ");
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74
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75 var values = new List<object>();
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76 foreach (var member in members)
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77 {
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78 var sbItem = new StringBuilder();
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79
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80 var value = member.GetValue(item);
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81
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82 if (value is DateTime?)
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83 value = ((DateTime?)value).Value;
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84
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85 sp.BuildValue(sbItem, value);
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86
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87 values.Add(sbItem + " " + member.Name);
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88 }
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89
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90 sb.AppendFormat(valuesWihtoutSequence, values.ToArray());
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91 sb.Append(" FROM DUAL");
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92
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93 isFirstValues = false;
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94
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95 n++;
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96 if (n > maxBatchSize)
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97 {
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98 sb.Append(")");
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99 sqlList.Add(sb.ToString());
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100 sb = new StringBuilder(initQuery);
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101 isFirstValues = true;
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102 n = 0;
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103 }
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104 }
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105
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106 if (n > 0)
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107 {
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108 sb.Append(")");
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109 sqlList.Add(sb.ToString());
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110 }
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111 return sqlList;
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112 }
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113
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114 private List<string> GetInsertBatchSqlListWithInsertAll<T>(
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115 string insertText,
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116 IEnumerable<T> collection,
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117 MemberMapper[] members,
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118 int maxBatchSize)
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119 {
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120 var sb = new StringBuilder();
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121 var sp = new OracleSqlProvider();
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122 var n = 0;
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123 var sqlList = new List<string>();
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124
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125 foreach (var item in collection)
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126 {
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127 if (sb.Length == 0)
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128 sb.AppendLine("INSERT ALL");
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129
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130 string strItem = "\t" + insertText
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131 .Replace("INSERT INTO", "INTO")
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132 .Replace("\r", "")
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133 .Replace("\n", "")
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134 .Replace("\t", " ")
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135 .Replace("( ", "(");
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136
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137 var values = new List<object>();
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138 foreach (var member in members)
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139 {
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140 var sbItem = new StringBuilder();
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141
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142 var keyGenerator = member.MapMemberInfo.KeyGenerator as SequenceKeyGenerator;
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143 if (keyGenerator != null)
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144 {
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145 values.Add(NextSequenceQuery(keyGenerator.Sequence));
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146 }
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147 else
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148 {
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149 var value = member.GetValue(item);
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150
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151 if (value is DateTime?)
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152 value = ((DateTime?)value).Value;
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153
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154 sp.BuildValue(sbItem, value);
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155
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156 values.Add(sbItem.ToString());
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157 }
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158 }
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159
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160 sb.AppendFormat(strItem, values.ToArray());
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161 sb.AppendLine();
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162
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163 n++;
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164
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165 if (n >= maxBatchSize)
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166 {
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167 sb.AppendLine("SELECT * FROM dual");
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168
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169 var sql = sb.ToString();
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170 sqlList.Add(sql);
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171
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172 n = 0;
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173 sb.Length = 0;
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174 }
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175 }
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176
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177 if (n > 0)
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178 {
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179 sb.AppendLine("SELECT * FROM dual");
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180
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181 var sql = sb.ToString();
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182 sqlList.Add(sql);
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183 }
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184
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185 return sqlList;
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186 }
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187
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188 public override string GetSequenceQuery(string sequenceName)
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189 {
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190 return string.Format("SELECT {0}.NEXTVAL FROM DUAL", sequenceName);
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191 }
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192
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193 public override string NextSequenceQuery(string sequenceName)
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194 {
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195 return string.Format("{0}.NEXTVAL", sequenceName);
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196 }
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197
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198 public override string GetReturningInto(string columnName)
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199 {
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200 return string.Format("returning {0} into :IDENTITY_PARAMETER", columnName);
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201 }
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202 }
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203 } |
