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Overview
| Comment: | Modify the fix for #2244 to avoid using a vdbe label. (CVS 3653) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
f7ce74b22ab739b8c8599cdc605aa9da |
| User & Date: | danielk1977 2007-02-21 17:04:04 |
Context
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2007-02-22
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| 23:06 | Make the depth of the pushdown automaton stack generated by lemon changable at compile-time using -DYYSTACKDEPTH=<number>. (CVS 3654) check-in: d8845ac1 user: drh tags: trunk | |
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2007-02-21
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| 17:04 | Modify the fix for #2244 to avoid using a vdbe label. (CVS 3653) check-in: f7ce74b2 user: danielk1977 tags: trunk | |
| 16:52 | Fix for an UPDATE on a virtual table when the WHERE clause matches zero rows. Ticket #2244. (CVS 3652) check-in: 43bf7978 user: danielk1977 tags: trunk | |
Changes
Changes to src/update.c.
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** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** This file contains C code routines that are called by the parser ** to handle UPDATE statements. ** ** $Id: update.c,v 1.135 2007/02/21 16:52:12 danielk1977 Exp $ */ #include "sqliteInt.h" #ifndef SQLITE_OMIT_VIRTUALTABLE /* Forward declaration */ static void updateVirtualTable( Parse *pParse, /* The parsing context */ ................................................................................ Vdbe *v = pParse->pVdbe; /* Virtual machine under construction */ ExprList *pEList = 0; /* The result set of the SELECT statement */ Select *pSelect = 0; /* The SELECT statement */ Expr *pExpr; /* Temporary expression */ int ephemTab; /* Table holding the result of the SELECT */ int i; /* Loop counter */ int addr; /* Address of top of loop */ int iLabel; /* Vdbe label used by the OP_Rewind op */ /* Construct the SELECT statement that will find the new values for ** all updated rows. */ pEList = sqlite3ExprListAppend(0, sqlite3CreateIdExpr("_rowid_"), 0); if( pRowid ){ pEList = sqlite3ExprListAppend(pEList, sqlite3ExprDup(pRowid), 0); ................................................................................ */ sqlite3Select(pParse, pSelect, SRT_Table, ephemTab, 0, 0, 0, 0); /* ** Generate code to scan the ephemeral table and call VDelete and ** VInsert */ iLabel = sqlite3VdbeMakeLabel(v); sqlite3VdbeAddOp(v, OP_Rewind, ephemTab, iLabel); addr = sqlite3VdbeCurrentAddr(v); sqlite3VdbeAddOp(v, OP_Column, ephemTab, 0); if( pRowid ){ sqlite3VdbeAddOp(v, OP_Column, ephemTab, 1); }else{ sqlite3VdbeAddOp(v, OP_Dup, 0, 0); } ................................................................................ for(i=0; i<pTab->nCol; i++){ sqlite3VdbeAddOp(v, OP_Column, ephemTab, i+1+(pRowid!=0)); } pParse->pVirtualLock = pTab; sqlite3VdbeOp3(v, OP_VUpdate, 0, pTab->nCol+2, (const char*)pTab->pVtab, P3_VTAB); sqlite3VdbeAddOp(v, OP_Next, ephemTab, addr); sqlite3VdbeResolveLabel(v, iLabel); sqlite3VdbeAddOp(v, OP_Close, ephemTab, 0); /* Cleanup */ sqlite3SelectDelete(pSelect); } #endif /* SQLITE_OMIT_VIRTUALTABLE */ |
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** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** This file contains C code routines that are called by the parser ** to handle UPDATE statements. ** ** $Id: update.c,v 1.136 2007/02/21 17:04:04 danielk1977 Exp $ */ #include "sqliteInt.h" #ifndef SQLITE_OMIT_VIRTUALTABLE /* Forward declaration */ static void updateVirtualTable( Parse *pParse, /* The parsing context */ ................................................................................ Vdbe *v = pParse->pVdbe; /* Virtual machine under construction */ ExprList *pEList = 0; /* The result set of the SELECT statement */ Select *pSelect = 0; /* The SELECT statement */ Expr *pExpr; /* Temporary expression */ int ephemTab; /* Table holding the result of the SELECT */ int i; /* Loop counter */ int addr; /* Address of top of loop */ /* Construct the SELECT statement that will find the new values for ** all updated rows. */ pEList = sqlite3ExprListAppend(0, sqlite3CreateIdExpr("_rowid_"), 0); if( pRowid ){ pEList = sqlite3ExprListAppend(pEList, sqlite3ExprDup(pRowid), 0); ................................................................................ */ sqlite3Select(pParse, pSelect, SRT_Table, ephemTab, 0, 0, 0, 0); /* ** Generate code to scan the ephemeral table and call VDelete and ** VInsert */ sqlite3VdbeAddOp(v, OP_Rewind, ephemTab, 0); addr = sqlite3VdbeCurrentAddr(v); sqlite3VdbeAddOp(v, OP_Column, ephemTab, 0); if( pRowid ){ sqlite3VdbeAddOp(v, OP_Column, ephemTab, 1); }else{ sqlite3VdbeAddOp(v, OP_Dup, 0, 0); } ................................................................................ for(i=0; i<pTab->nCol; i++){ sqlite3VdbeAddOp(v, OP_Column, ephemTab, i+1+(pRowid!=0)); } pParse->pVirtualLock = pTab; sqlite3VdbeOp3(v, OP_VUpdate, 0, pTab->nCol+2, (const char*)pTab->pVtab, P3_VTAB); sqlite3VdbeAddOp(v, OP_Next, ephemTab, addr); sqlite3VdbeJumpHere(v, addr-1); sqlite3VdbeAddOp(v, OP_Close, ephemTab, 0); /* Cleanup */ sqlite3SelectDelete(pSelect); } #endif /* SQLITE_OMIT_VIRTUALTABLE */ |