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Add code to handle non-recursive CTEs in the same way as SQL views.

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FossilOrigin-Name: a26f399ba485e8127c276c5f103ec6c555e11734
This commit is contained in:
dan
2014-01-13 15:12:23 +00:00
parent 7d562dbe02
commit 4e9119d9e8
12 changed files with 345 additions and 37 deletions
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19
src/expr.c
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@@ -895,6 +895,24 @@ static Expr *exprDup(sqlite3 *db, Expr *p, int flags, u8 **pzBuffer){
return pNew;
}
With *withDup(sqlite3 *db, With *p){
With *pRet = 0;
if( p ){
int nByte = sizeof(*p) + sizeof(p->a[0]) * (p->nCte-1);
pRet = sqlite3DbMallocZero(db, nByte);
if( pRet ){
int i;
pRet->nCte = p->nCte;
for(i=0; i<p->nCte; i++){
pRet->a[i].pSelect = sqlite3SelectDup(db, p->a[i].pSelect, 0);
pRet->a[i].pCols = sqlite3ExprListDup(db, p->a[i].pCols, 0);
pRet->a[i].zName = sqlite3DbStrDup(db, p->a[i].zName);
}
}
}
return pRet;
}
/*
** The following group of routines make deep copies of expressions,
** expression lists, ID lists, and select statements. The copies can
@@ -1036,6 +1054,7 @@ Select *sqlite3SelectDup(sqlite3 *db, Select *p, int flags){
pNew->addrOpenEphm[0] = -1;
pNew->addrOpenEphm[1] = -1;
pNew->addrOpenEphm[2] = -1;
pNew->pWith = withDup(db, p->pWith);
return pNew;
}
#else