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Omit all use of Expr nodes for TK_AS, as those nodes no longer served a useful

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purpose and in fact interferred with the query planner.

FossilOrigin-Name: 7ab0b258eabfcfb7f1b0bd1b12e166d2f267823d
This commit is contained in:
drh
2015-09-05 22:36:07 +00:00
parent 28b9e0fc05
commit 0b8d255c37
7 changed files with 38 additions and 57 deletions
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8
src/expr.c
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@@ -91,7 +91,7 @@ Expr *sqlite3ExprAddCollateString(Parse *pParse, Expr *pExpr, const char *zC){
}
/*
** Skip over any TK_COLLATE or TK_AS operators and any unlikely()
** Skip over any TK_COLLATE operators and any unlikely()
** or likelihood() function at the root of an expression.
*/
Expr *sqlite3ExprSkipCollate(Expr *pExpr){
@@ -102,7 +102,7 @@ Expr *sqlite3ExprSkipCollate(Expr *pExpr){
assert( pExpr->op==TK_FUNCTION );
pExpr = pExpr->x.pList->a[0].pExpr;
}else{
assert( pExpr->op==TK_COLLATE || pExpr->op==TK_AS );
assert( pExpr->op==TK_COLLATE );
pExpr = pExpr->pLeft;
}
}
@@ -2701,10 +2701,6 @@ int sqlite3ExprCodeTarget(Parse *pParse, Expr *pExpr, int target){
inReg = pExpr->iTable;
break;
}
case TK_AS: {
inReg = sqlite3ExprCodeTarget(pParse, pExpr->pLeft, target);
break;
}
#ifndef SQLITE_OMIT_CAST
case TK_CAST: {
/* Expressions of the form: CAST(pLeft AS token) */