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If an update does not modify any child or parent key columns, omit foreign key processing for the statement.

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FossilOrigin-Name: edff3500058eb8ad2381f855ef7a09ecb680f7b8
This commit is contained in:
dan
2009-10-01 16:09:04 +00:00
parent d583502e7d
commit e7a94d8128
9 changed files with 94 additions and 59 deletions
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8
src/delete.c
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@@ -342,7 +342,7 @@ void sqlite3DeleteFrom(
** this optimization caused the row change count (the value returned by
** API function sqlite3_count_changes) to be set incorrectly. */
if( rcauth==SQLITE_OK && pWhere==0 && !pTrigger && !IsVirtual(pTab)
&& 0==sqlite3FkRequired(pParse, pTab, 0)
&& 0==sqlite3FkRequired(pParse, pTab, 0, 0)
){
assert( !isView );
sqlite3VdbeAddOp4(v, OP_Clear, pTab->tnum, iDb, memCnt,
@@ -492,14 +492,14 @@ void sqlite3GenerateRowDelete(
/* If there are any triggers to fire, allocate a range of registers to
** use for the old.* references in the triggers. */
if( sqlite3FkRequired(pParse, pTab, 0) || pTrigger ){
if( sqlite3FkRequired(pParse, pTab, 0, 0) || pTrigger ){
u32 mask; /* Mask of OLD.* columns in use */
int iCol; /* Iterator used while populating OLD.* */
/* TODO: Could use temporary registers here. Also could attempt to
** avoid copying the contents of the rowid register. */
mask = sqlite3TriggerOldmask(pParse, pTrigger, 0, pTab, onconf);
mask |= sqlite3FkOldmask(pParse, pTab, 0);
mask |= sqlite3FkOldmask(pParse, pTab);
iOld = pParse->nMem+1;
pParse->nMem += (1 + pTab->nCol);
@@ -528,7 +528,7 @@ void sqlite3GenerateRowDelete(
/* Do FK processing. This call checks that any FK constraints that
** refer to this table (i.e. constraints attached to other tables)
** are not violated by deleting this row. */
sqlite3FkCheck(pParse, pTab, 0, iOld, 0);
sqlite3FkCheck(pParse, pTab, iOld, 0);
}
/* Delete the index and table entries. Skip this step if pTab is really