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Add the SQLITE_ENABLE_PREUPDATE_HOOK compile-time option.

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FossilOrigin-Name: 6634521461e6acff7cc778590e62d57831f9230d
This commit is contained in:
drh
2011-03-30 21:04:43 +00:00
parent 67c495ac20
commit 9b1c62d416
20 changed files with 95 additions and 39 deletions
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2
src/insert.c
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@@ -1286,12 +1286,14 @@ void sqlite3GenerateConstraintChecks(
pParse, pTab, baseCur, regRowid, 0, pTrigger, OE_Replace
);
}else{
#ifdef SQLITE_ENABLE_PREUPDATE_HOOK
/* This OP_Delete opcode fires the pre-update-hook only. It does
** not modify the b-tree. It is more efficient to let the coming
** OP_Insert replace the existing entry than it is to delete the
** existing entry and then insert a new one. */
sqlite3VdbeAddOp2(v, OP_Delete, baseCur, OPFLAG_ISNOOP);
sqlite3VdbeChangeP4(v, -1, (char *)pTab, P4_TABLE);
#endif /* SQLITE_ENABLE_PREUPDATE_HOOK */
if( pTab->pIndex ){
sqlite3MultiWrite(pParse);
sqlite3GenerateRowIndexDelete(pParse, pTab, baseCur, 0);