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1 /* |
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2 ** 2001 September 15 |
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3 ** |
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4 ** The author disclaims copyright to this source code. In place of |
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5 ** a legal notice, here is a blessing: |
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6 ** |
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7 ** May you do good and not evil. |
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8 ** May you find forgiveness for yourself and forgive others. |
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9 ** May you share freely, never taking more than you give. |
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10 ** |
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11 ************************************************************************* |
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12 ** This file contains C code routines that are called by the parser |
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13 ** in order to generate code for DELETE FROM statements. |
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14 ** |
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15 ** $Id: delete.c,v 1.175 2008/09/01 21:59:43 shane Exp $ |
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16 */ |
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17 #include "sqliteInt.h" |
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18 |
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19 /* |
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20 ** Look up every table that is named in pSrc. If any table is not found, |
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21 ** add an error message to pParse->zErrMsg and return NULL. If all tables |
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22 ** are found, return a pointer to the last table. |
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23 */ |
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24 Table *sqlite3SrcListLookup(Parse *pParse, SrcList *pSrc){ |
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25 Table *pTab = 0; |
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26 int i; |
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27 struct SrcList_item *pItem; |
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28 for(i=0, pItem=pSrc->a; i<pSrc->nSrc; i++, pItem++){ |
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29 pTab = sqlite3LocateTable(pParse, 0, pItem->zName, pItem->zDatabase); |
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30 sqlite3DeleteTable(pItem->pTab); |
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31 pItem->pTab = pTab; |
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32 if( pTab ){ |
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33 pTab->nRef++; |
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34 } |
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35 } |
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36 return pTab; |
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37 } |
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38 |
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39 /* |
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40 ** Check to make sure the given table is writable. If it is not |
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41 ** writable, generate an error message and return 1. If it is |
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42 ** writable return 0; |
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43 */ |
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44 int sqlite3IsReadOnly(Parse *pParse, Table *pTab, int viewOk){ |
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45 if( ((pTab->tabFlags & TF_Readonly)!=0 |
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46 && (pParse->db->flags & SQLITE_WriteSchema)==0 |
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47 && pParse->nested==0) |
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48 #ifndef SQLITE_OMIT_VIRTUALTABLE |
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49 || (pTab->pMod && pTab->pMod->pModule->xUpdate==0) |
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50 #endif |
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51 ){ |
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52 sqlite3ErrorMsg(pParse, "table %s may not be modified", pTab->zName); |
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53 return 1; |
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54 } |
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55 #ifndef SQLITE_OMIT_VIEW |
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56 if( !viewOk && pTab->pSelect ){ |
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57 sqlite3ErrorMsg(pParse,"cannot modify %s because it is a view",pTab->zName); |
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58 return 1; |
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59 } |
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60 #endif |
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61 return 0; |
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62 } |
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63 |
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64 /* |
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65 ** Generate code that will open a table for reading. |
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66 */ |
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67 void sqlite3OpenTable( |
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68 Parse *p, /* Generate code into this VDBE */ |
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69 int iCur, /* The cursor number of the table */ |
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70 int iDb, /* The database index in sqlite3.aDb[] */ |
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71 Table *pTab, /* The table to be opened */ |
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72 int opcode /* OP_OpenRead or OP_OpenWrite */ |
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73 ){ |
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74 Vdbe *v; |
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75 if( IsVirtual(pTab) ) return; |
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76 v = sqlite3GetVdbe(p); |
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77 assert( opcode==OP_OpenWrite || opcode==OP_OpenRead ); |
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78 sqlite3TableLock(p, iDb, pTab->tnum, (opcode==OP_OpenWrite), pTab->zName); |
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79 sqlite3VdbeAddOp2(v, OP_SetNumColumns, 0, pTab->nCol); |
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80 sqlite3VdbeAddOp3(v, opcode, iCur, pTab->tnum, iDb); |
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81 VdbeComment((v, "%s", pTab->zName)); |
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82 } |
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83 |
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84 |
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85 #if !defined(SQLITE_OMIT_VIEW) && !defined(SQLITE_OMIT_TRIGGER) |
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86 /* |
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87 ** Evaluate a view and store its result in an ephemeral table. The |
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88 ** pWhere argument is an optional WHERE clause that restricts the |
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89 ** set of rows in the view that are to be added to the ephemeral table. |
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90 */ |
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91 void sqlite3MaterializeView( |
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92 Parse *pParse, /* Parsing context */ |
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93 Table *pView, /* View definition */ |
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94 Expr *pWhere, /* Optional WHERE clause to be added */ |
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95 int iCur /* Cursor number for ephemerial table */ |
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96 ){ |
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97 SelectDest dest; |
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98 Select *pDup; |
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99 sqlite3 *db = pParse->db; |
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100 |
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101 pDup = sqlite3SelectDup(db, pView->pSelect); |
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102 if( pWhere ){ |
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103 SrcList *pFrom; |
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104 Token viewName; |
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105 |
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106 pWhere = sqlite3ExprDup(db, pWhere); |
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107 viewName.z = (u8*)pView->zName; |
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108 viewName.n = (unsigned int)strlen((const char*)viewName.z); |
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109 pFrom = sqlite3SrcListAppendFromTerm(pParse, 0, 0, 0, &viewName, pDup, 0,0); |
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110 pDup = sqlite3SelectNew(pParse, 0, pFrom, pWhere, 0, 0, 0, 0, 0, 0); |
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111 } |
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112 sqlite3SelectDestInit(&dest, SRT_EphemTab, iCur); |
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113 sqlite3Select(pParse, pDup, &dest); |
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114 sqlite3SelectDelete(db, pDup); |
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115 } |
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116 #endif /* !defined(SQLITE_OMIT_VIEW) && !defined(SQLITE_OMIT_TRIGGER) */ |
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117 |
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118 |
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119 /* |
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120 ** Generate code for a DELETE FROM statement. |
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121 ** |
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122 ** DELETE FROM table_wxyz WHERE a<5 AND b NOT NULL; |
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123 ** \________/ \________________/ |
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124 ** pTabList pWhere |
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125 */ |
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126 void sqlite3DeleteFrom( |
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127 Parse *pParse, /* The parser context */ |
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128 SrcList *pTabList, /* The table from which we should delete things */ |
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129 Expr *pWhere /* The WHERE clause. May be null */ |
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130 ){ |
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131 Vdbe *v; /* The virtual database engine */ |
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132 Table *pTab; /* The table from which records will be deleted */ |
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133 const char *zDb; /* Name of database holding pTab */ |
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134 int end, addr = 0; /* A couple addresses of generated code */ |
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135 int i; /* Loop counter */ |
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136 WhereInfo *pWInfo; /* Information about the WHERE clause */ |
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137 Index *pIdx; /* For looping over indices of the table */ |
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138 int iCur; /* VDBE Cursor number for pTab */ |
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139 sqlite3 *db; /* Main database structure */ |
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140 AuthContext sContext; /* Authorization context */ |
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141 int oldIdx = -1; /* Cursor for the OLD table of AFTER triggers */ |
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142 NameContext sNC; /* Name context to resolve expressions in */ |
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143 int iDb; /* Database number */ |
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144 int memCnt = 0; /* Memory cell used for change counting */ |
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145 |
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146 #ifndef SQLITE_OMIT_TRIGGER |
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147 int isView; /* True if attempting to delete from a view */ |
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148 int triggers_exist = 0; /* True if any triggers exist */ |
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149 #endif |
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150 int iBeginAfterTrigger; /* Address of after trigger program */ |
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151 int iEndAfterTrigger; /* Exit of after trigger program */ |
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152 int iBeginBeforeTrigger; /* Address of before trigger program */ |
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153 int iEndBeforeTrigger; /* Exit of before trigger program */ |
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154 u32 old_col_mask = 0; /* Mask of OLD.* columns in use */ |
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155 |
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156 sContext.pParse = 0; |
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157 db = pParse->db; |
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158 if( pParse->nErr || db->mallocFailed ){ |
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159 goto delete_from_cleanup; |
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160 } |
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161 assert( pTabList->nSrc==1 ); |
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162 |
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163 /* Locate the table which we want to delete. This table has to be |
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164 ** put in an SrcList structure because some of the subroutines we |
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165 ** will be calling are designed to work with multiple tables and expect |
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166 ** an SrcList* parameter instead of just a Table* parameter. |
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167 */ |
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168 pTab = sqlite3SrcListLookup(pParse, pTabList); |
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169 if( pTab==0 ) goto delete_from_cleanup; |
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170 |
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171 /* Figure out if we have any triggers and if the table being |
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172 ** deleted from is a view |
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173 */ |
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174 #ifndef SQLITE_OMIT_TRIGGER |
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175 triggers_exist = sqlite3TriggersExist(pParse, pTab, TK_DELETE, 0); |
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176 isView = pTab->pSelect!=0; |
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177 #else |
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178 # define triggers_exist 0 |
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179 # define isView 0 |
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180 #endif |
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181 #ifdef SQLITE_OMIT_VIEW |
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182 # undef isView |
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183 # define isView 0 |
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184 #endif |
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185 |
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186 if( sqlite3IsReadOnly(pParse, pTab, triggers_exist) ){ |
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187 goto delete_from_cleanup; |
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188 } |
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189 iDb = sqlite3SchemaToIndex(db, pTab->pSchema); |
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190 assert( iDb<db->nDb ); |
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191 zDb = db->aDb[iDb].zName; |
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192 if( sqlite3AuthCheck(pParse, SQLITE_DELETE, pTab->zName, 0, zDb) ){ |
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193 goto delete_from_cleanup; |
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194 } |
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195 |
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196 /* If pTab is really a view, make sure it has been initialized. |
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197 */ |
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198 if( sqlite3ViewGetColumnNames(pParse, pTab) ){ |
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199 goto delete_from_cleanup; |
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200 } |
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201 |
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202 /* Allocate a cursor used to store the old.* data for a trigger. |
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203 */ |
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204 if( triggers_exist ){ |
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205 oldIdx = pParse->nTab++; |
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206 } |
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207 |
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208 /* Assign cursor number to the table and all its indices. |
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209 */ |
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210 assert( pTabList->nSrc==1 ); |
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211 iCur = pTabList->a[0].iCursor = pParse->nTab++; |
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212 for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){ |
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213 pParse->nTab++; |
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214 } |
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215 |
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216 /* Start the view context |
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217 */ |
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218 if( isView ){ |
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219 sqlite3AuthContextPush(pParse, &sContext, pTab->zName); |
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220 } |
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221 |
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222 /* Begin generating code. |
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223 */ |
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224 v = sqlite3GetVdbe(pParse); |
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225 if( v==0 ){ |
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226 goto delete_from_cleanup; |
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227 } |
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228 if( pParse->nested==0 ) sqlite3VdbeCountChanges(v); |
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229 sqlite3BeginWriteOperation(pParse, triggers_exist, iDb); |
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230 |
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231 if( triggers_exist ){ |
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232 int orconf = ((pParse->trigStack)?pParse->trigStack->orconf:OE_Default); |
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233 int iGoto = sqlite3VdbeAddOp0(v, OP_Goto); |
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234 addr = sqlite3VdbeMakeLabel(v); |
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235 |
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236 iBeginBeforeTrigger = sqlite3VdbeCurrentAddr(v); |
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237 (void)sqlite3CodeRowTrigger(pParse, TK_DELETE, 0, TRIGGER_BEFORE, pTab, |
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238 -1, oldIdx, orconf, addr, &old_col_mask, 0); |
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239 iEndBeforeTrigger = sqlite3VdbeAddOp0(v, OP_Goto); |
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240 |
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241 iBeginAfterTrigger = sqlite3VdbeCurrentAddr(v); |
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242 (void)sqlite3CodeRowTrigger(pParse, TK_DELETE, 0, TRIGGER_AFTER, pTab, -1, |
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243 oldIdx, orconf, addr, &old_col_mask, 0); |
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244 iEndAfterTrigger = sqlite3VdbeAddOp0(v, OP_Goto); |
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245 |
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246 sqlite3VdbeJumpHere(v, iGoto); |
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247 } |
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248 |
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249 /* If we are trying to delete from a view, realize that view into |
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250 ** a ephemeral table. |
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251 */ |
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252 #if !defined(SQLITE_OMIT_VIEW) && !defined(SQLITE_OMIT_TRIGGER) |
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253 if( isView ){ |
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254 sqlite3MaterializeView(pParse, pTab, pWhere, iCur); |
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255 } |
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256 #endif |
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257 |
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258 /* Resolve the column names in the WHERE clause. |
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259 */ |
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260 memset(&sNC, 0, sizeof(sNC)); |
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261 sNC.pParse = pParse; |
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262 sNC.pSrcList = pTabList; |
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263 if( sqlite3ResolveExprNames(&sNC, pWhere) ){ |
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264 goto delete_from_cleanup; |
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265 } |
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266 |
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267 /* Initialize the counter of the number of rows deleted, if |
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268 ** we are counting rows. |
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269 */ |
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270 if( db->flags & SQLITE_CountRows ){ |
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271 memCnt = ++pParse->nMem; |
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272 sqlite3VdbeAddOp2(v, OP_Integer, 0, memCnt); |
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273 } |
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274 |
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275 /* Special case: A DELETE without a WHERE clause deletes everything. |
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276 ** It is easier just to erase the whole table. Note, however, that |
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277 ** this means that the row change count will be incorrect. |
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278 */ |
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279 if( pWhere==0 && !triggers_exist && !IsVirtual(pTab) ){ |
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280 if( db->flags & SQLITE_CountRows ){ |
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281 /* If counting rows deleted, just count the total number of |
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282 ** entries in the table. */ |
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283 int addr2; |
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284 if( !isView ){ |
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285 sqlite3OpenTable(pParse, iCur, iDb, pTab, OP_OpenRead); |
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286 } |
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287 sqlite3VdbeAddOp2(v, OP_Rewind, iCur, sqlite3VdbeCurrentAddr(v)+2); |
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288 addr2 = sqlite3VdbeAddOp2(v, OP_AddImm, memCnt, 1); |
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289 sqlite3VdbeAddOp2(v, OP_Next, iCur, addr2); |
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290 sqlite3VdbeAddOp1(v, OP_Close, iCur); |
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291 } |
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292 if( !isView ){ |
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293 sqlite3VdbeAddOp2(v, OP_Clear, pTab->tnum, iDb); |
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294 if( !pParse->nested ){ |
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295 sqlite3VdbeChangeP4(v, -1, pTab->zName, P4_STATIC); |
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296 } |
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297 for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){ |
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298 assert( pIdx->pSchema==pTab->pSchema ); |
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299 sqlite3VdbeAddOp2(v, OP_Clear, pIdx->tnum, iDb); |
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300 } |
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301 } |
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302 } |
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303 /* The usual case: There is a WHERE clause so we have to scan through |
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304 ** the table and pick which records to delete. |
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305 */ |
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306 else{ |
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307 int iRowid = ++pParse->nMem; /* Used for storing rowid values. */ |
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308 |
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309 /* Begin the database scan |
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310 */ |
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311 pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, 0, 0); |
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312 if( pWInfo==0 ) goto delete_from_cleanup; |
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313 |
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314 /* Remember the rowid of every item to be deleted. |
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315 */ |
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316 sqlite3VdbeAddOp2(v, IsVirtual(pTab) ? OP_VRowid : OP_Rowid, iCur, iRowid); |
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317 sqlite3VdbeAddOp1(v, OP_FifoWrite, iRowid); |
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318 if( db->flags & SQLITE_CountRows ){ |
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319 sqlite3VdbeAddOp2(v, OP_AddImm, memCnt, 1); |
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320 } |
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321 |
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322 /* End the database scan loop. |
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323 */ |
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324 sqlite3WhereEnd(pWInfo); |
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325 |
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326 /* Open the pseudo-table used to store OLD if there are triggers. |
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327 */ |
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328 if( triggers_exist ){ |
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329 sqlite3VdbeAddOp2(v, OP_SetNumColumns, 0, pTab->nCol); |
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330 sqlite3VdbeAddOp1(v, OP_OpenPseudo, oldIdx); |
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331 } |
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332 |
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333 /* Delete every item whose key was written to the list during the |
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334 ** database scan. We have to delete items after the scan is complete |
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335 ** because deleting an item can change the scan order. |
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336 */ |
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337 end = sqlite3VdbeMakeLabel(v); |
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338 |
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339 if( !isView ){ |
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340 /* Open cursors for the table we are deleting from and |
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341 ** all its indices. |
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342 */ |
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343 sqlite3OpenTableAndIndices(pParse, pTab, iCur, OP_OpenWrite); |
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344 } |
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345 |
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346 /* This is the beginning of the delete loop. If a trigger encounters |
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347 ** an IGNORE constraint, it jumps back to here. |
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348 */ |
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349 if( triggers_exist ){ |
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350 sqlite3VdbeResolveLabel(v, addr); |
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351 } |
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352 addr = sqlite3VdbeAddOp2(v, OP_FifoRead, iRowid, end); |
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353 |
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354 if( triggers_exist ){ |
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355 int iData = ++pParse->nMem; /* For storing row data of OLD table */ |
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356 |
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357 /* If the record is no longer present in the table, jump to the |
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358 ** next iteration of the loop through the contents of the fifo. |
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359 */ |
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360 sqlite3VdbeAddOp3(v, OP_NotExists, iCur, addr, iRowid); |
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361 |
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362 /* Populate the OLD.* pseudo-table */ |
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363 if( old_col_mask ){ |
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364 sqlite3VdbeAddOp2(v, OP_RowData, iCur, iData); |
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365 }else{ |
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366 sqlite3VdbeAddOp2(v, OP_Null, 0, iData); |
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367 } |
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368 sqlite3VdbeAddOp3(v, OP_Insert, oldIdx, iData, iRowid); |
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369 |
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370 /* Jump back and run the BEFORE triggers */ |
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371 sqlite3VdbeAddOp2(v, OP_Goto, 0, iBeginBeforeTrigger); |
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372 sqlite3VdbeJumpHere(v, iEndBeforeTrigger); |
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373 } |
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374 |
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375 if( !isView ){ |
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376 /* Delete the row */ |
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377 #ifndef SQLITE_OMIT_VIRTUALTABLE |
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378 if( IsVirtual(pTab) ){ |
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379 const char *pVtab = (const char *)pTab->pVtab; |
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380 sqlite3VtabMakeWritable(pParse, pTab); |
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381 sqlite3VdbeAddOp4(v, OP_VUpdate, 0, 1, iRowid, pVtab, P4_VTAB); |
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382 }else |
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383 #endif |
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384 { |
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385 sqlite3GenerateRowDelete(pParse, pTab, iCur, iRowid, pParse->nested==0); |
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386 } |
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387 } |
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388 |
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389 /* If there are row triggers, close all cursors then invoke |
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390 ** the AFTER triggers |
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391 */ |
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392 if( triggers_exist ){ |
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393 /* Jump back and run the AFTER triggers */ |
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394 sqlite3VdbeAddOp2(v, OP_Goto, 0, iBeginAfterTrigger); |
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395 sqlite3VdbeJumpHere(v, iEndAfterTrigger); |
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396 } |
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397 |
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398 /* End of the delete loop */ |
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399 sqlite3VdbeAddOp2(v, OP_Goto, 0, addr); |
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400 sqlite3VdbeResolveLabel(v, end); |
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401 |
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402 /* Close the cursors after the loop if there are no row triggers */ |
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403 if( !isView && !IsVirtual(pTab) ){ |
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404 for(i=1, pIdx=pTab->pIndex; pIdx; i++, pIdx=pIdx->pNext){ |
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405 sqlite3VdbeAddOp2(v, OP_Close, iCur + i, pIdx->tnum); |
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406 } |
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407 sqlite3VdbeAddOp1(v, OP_Close, iCur); |
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408 } |
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409 } |
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410 |
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411 /* |
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412 ** Return the number of rows that were deleted. If this routine is |
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413 ** generating code because of a call to sqlite3NestedParse(), do not |
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414 ** invoke the callback function. |
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415 */ |
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416 if( db->flags & SQLITE_CountRows && pParse->nested==0 && !pParse->trigStack ){ |
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417 sqlite3VdbeAddOp2(v, OP_ResultRow, memCnt, 1); |
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418 sqlite3VdbeSetNumCols(v, 1); |
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419 sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "rows deleted", P4_STATIC); |
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420 } |
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421 |
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422 delete_from_cleanup: |
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423 sqlite3AuthContextPop(&sContext); |
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424 sqlite3SrcListDelete(db, pTabList); |
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425 sqlite3ExprDelete(db, pWhere); |
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426 return; |
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427 } |
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428 |
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429 /* |
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430 ** This routine generates VDBE code that causes a single row of a |
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431 ** single table to be deleted. |
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432 ** |
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433 ** The VDBE must be in a particular state when this routine is called. |
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434 ** These are the requirements: |
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435 ** |
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436 ** 1. A read/write cursor pointing to pTab, the table containing the row |
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437 ** to be deleted, must be opened as cursor number "base". |
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438 ** |
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439 ** 2. Read/write cursors for all indices of pTab must be open as |
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440 ** cursor number base+i for the i-th index. |
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441 ** |
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442 ** 3. The record number of the row to be deleted must be stored in |
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443 ** memory cell iRowid. |
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444 ** |
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445 ** This routine pops the top of the stack to remove the record number |
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446 ** and then generates code to remove both the table record and all index |
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447 ** entries that point to that record. |
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448 */ |
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449 void sqlite3GenerateRowDelete( |
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450 Parse *pParse, /* Parsing context */ |
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451 Table *pTab, /* Table containing the row to be deleted */ |
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452 int iCur, /* Cursor number for the table */ |
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453 int iRowid, /* Memory cell that contains the rowid to delete */ |
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454 int count /* Increment the row change counter */ |
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455 ){ |
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456 int addr; |
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457 Vdbe *v; |
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458 |
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459 v = pParse->pVdbe; |
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460 addr = sqlite3VdbeAddOp3(v, OP_NotExists, iCur, 0, iRowid); |
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461 sqlite3GenerateRowIndexDelete(pParse, pTab, iCur, 0); |
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462 sqlite3VdbeAddOp2(v, OP_Delete, iCur, (count?OPFLAG_NCHANGE:0)); |
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463 if( count ){ |
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464 sqlite3VdbeChangeP4(v, -1, pTab->zName, P4_STATIC); |
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465 } |
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466 sqlite3VdbeJumpHere(v, addr); |
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467 } |
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468 |
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469 /* |
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470 ** This routine generates VDBE code that causes the deletion of all |
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471 ** index entries associated with a single row of a single table. |
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472 ** |
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473 ** The VDBE must be in a particular state when this routine is called. |
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474 ** These are the requirements: |
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475 ** |
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476 ** 1. A read/write cursor pointing to pTab, the table containing the row |
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477 ** to be deleted, must be opened as cursor number "iCur". |
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478 ** |
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479 ** 2. Read/write cursors for all indices of pTab must be open as |
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480 ** cursor number iCur+i for the i-th index. |
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481 ** |
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482 ** 3. The "iCur" cursor must be pointing to the row that is to be |
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483 ** deleted. |
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484 */ |
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485 void sqlite3GenerateRowIndexDelete( |
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486 Parse *pParse, /* Parsing and code generating context */ |
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487 Table *pTab, /* Table containing the row to be deleted */ |
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488 int iCur, /* Cursor number for the table */ |
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489 int *aRegIdx /* Only delete if aRegIdx!=0 && aRegIdx[i]>0 */ |
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490 ){ |
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491 int i; |
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492 Index *pIdx; |
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493 int r1; |
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494 |
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495 for(i=1, pIdx=pTab->pIndex; pIdx; i++, pIdx=pIdx->pNext){ |
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496 if( aRegIdx!=0 && aRegIdx[i-1]==0 ) continue; |
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497 r1 = sqlite3GenerateIndexKey(pParse, pIdx, iCur, 0, 0); |
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498 sqlite3VdbeAddOp3(pParse->pVdbe, OP_IdxDelete, iCur+i, r1,pIdx->nColumn+1); |
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499 } |
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500 } |
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501 |
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502 /* |
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503 ** Generate code that will assemble an index key and put it in register |
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504 ** regOut. The key with be for index pIdx which is an index on pTab. |
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505 ** iCur is the index of a cursor open on the pTab table and pointing to |
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506 ** the entry that needs indexing. |
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507 ** |
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508 ** Return a register number which is the first in a block of |
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509 ** registers that holds the elements of the index key. The |
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510 ** block of registers has already been deallocated by the time |
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511 ** this routine returns. |
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512 */ |
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513 int sqlite3GenerateIndexKey( |
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514 Parse *pParse, /* Parsing context */ |
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515 Index *pIdx, /* The index for which to generate a key */ |
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516 int iCur, /* Cursor number for the pIdx->pTable table */ |
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517 int regOut, /* Write the new index key to this register */ |
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518 int doMakeRec /* Run the OP_MakeRecord instruction if true */ |
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519 ){ |
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520 Vdbe *v = pParse->pVdbe; |
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521 int j; |
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522 Table *pTab = pIdx->pTable; |
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523 int regBase; |
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524 int nCol; |
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525 |
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526 nCol = pIdx->nColumn; |
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527 regBase = sqlite3GetTempRange(pParse, nCol+1); |
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528 sqlite3VdbeAddOp2(v, OP_Rowid, iCur, regBase+nCol); |
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529 for(j=0; j<nCol; j++){ |
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530 int idx = pIdx->aiColumn[j]; |
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531 if( idx==pTab->iPKey ){ |
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532 sqlite3VdbeAddOp2(v, OP_SCopy, regBase+nCol, regBase+j); |
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533 }else{ |
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534 sqlite3VdbeAddOp3(v, OP_Column, iCur, idx, regBase+j); |
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535 sqlite3ColumnDefault(v, pTab, idx); |
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536 } |
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537 } |
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538 if( doMakeRec ){ |
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539 sqlite3VdbeAddOp3(v, OP_MakeRecord, regBase, nCol+1, regOut); |
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540 sqlite3IndexAffinityStr(v, pIdx); |
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541 sqlite3ExprCacheAffinityChange(pParse, regBase, nCol+1); |
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542 } |
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543 sqlite3ReleaseTempRange(pParse, regBase, nCol+1); |
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544 return regBase; |
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545 } |
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546 |
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547 /* Make sure "isView" gets undefined in case this file becomes part of |
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548 ** the amalgamation - so that subsequent files do not see isView as a |
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549 ** macro. */ |
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550 #undef isView |