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Allow a FROM clause in UPDATE statements.

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FossilOrigin-Name: f353a1a613bb7ad8cedcda377a7fe6fd05ee03b1f50665b00b84a868a71c5bec
This commit is contained in:
dan
2020-04-27 20:55:33 +00:00
parent e238e31413
commit 69887c99d4
12 changed files with 717 additions and 200 deletions
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20
src/select.c
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@@ -1154,11 +1154,11 @@ static void selectInnerLoop(
break;
}
#ifndef SQLITE_OMIT_SUBQUERY
/* If we are creating a set for an "expr IN (SELECT ...)" construct,
** then there should be a single item on the stack. Write this
** item into the set table with bogus data.
*/
case SRT_ISet:
case SRT_Set: {
if( pSort ){
/* At first glance you would think we could optimize out the
@@ -1168,16 +1168,22 @@ static void selectInnerLoop(
pushOntoSorter(
pParse, pSort, p, regResult, regOrig, nResultCol, nPrefixReg);
}else{
int bITab = (eDest==SRT_ISet);
int r1 = sqlite3GetTempReg(pParse);
assert( sqlite3Strlen30(pDest->zAffSdst)==nResultCol );
sqlite3VdbeAddOp4(v, OP_MakeRecord, regResult, nResultCol,
r1, pDest->zAffSdst, nResultCol);
sqlite3VdbeAddOp4Int(v, OP_IdxInsert, iParm, r1, regResult, nResultCol);
sqlite3VdbeAddOp4(v, OP_MakeRecord, regResult+bITab, nResultCol-bITab,
r1, pDest->zAffSdst, 0
);
if( bITab ){
sqlite3VdbeAddOp3(v, OP_Insert, iParm, r1, regResult);
}else{
sqlite3VdbeAddOp4Int(v, OP_IdxInsert, iParm, r1,regResult,nResultCol);
}
sqlite3ReleaseTempReg(pParse, r1);
}
break;
}
#ifndef SQLITE_OMIT_SUBQUERY
/* If any row exist in the result set, record that fact and abort.
*/
case SRT_Exists: {
@@ -4981,8 +4987,8 @@ static int selectExpander(Walker *pWalker, Select *p){
for(i=0, pFrom=pTabList->a; i<pTabList->nSrc; i++, pFrom++){
Table *pTab;
assert( pFrom->fg.isRecursive==0 || pFrom->pTab!=0 );
if( pFrom->fg.isRecursive ) continue;
assert( pFrom->pTab==0 );
if( pFrom->pTab ) continue;
assert( pFrom->fg.isRecursive==0 );
#ifndef SQLITE_OMIT_CTE
if( withExpand(pWalker, pFrom) ) return WRC_Abort;
if( pFrom->pTab ) {} else