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Move some utility Walker callbacks into the walker.c source file, as they

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seem to belong there better.

FossilOrigin-Name: dac438236f7c5419d4e7e094e8b3f19f83cd3b1a18bc8acb14aee90d4514fa3c
This commit is contained in:
drh
2020-05-24 03:01:36 +00:00
parent ca74fbf6f1
commit e40cc16b47
6 changed files with 52 additions and 44 deletions
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37
src/walker.c
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@@ -207,3 +207,40 @@ int sqlite3WalkSelect(Walker *pWalker, Select *p){
}while( p!=0 );
return WRC_Continue;
}
/* Increase the walkerDepth when entering a subquery, and
** descrease when leaving the subquery.
*/
int sqlite3WalkerDepthIncrease(Walker *pWalker, Select *pSelect){
UNUSED_PARAMETER(pSelect);
pWalker->walkerDepth++;
return WRC_Continue;
}
void sqlite3WalkerDepthDecrease(Walker *pWalker, Select *pSelect){
UNUSED_PARAMETER(pSelect);
pWalker->walkerDepth--;
}
/*
** No-op routine for the parse-tree walker.
**
** When this routine is the Walker.xExprCallback then expression trees
** are walked without any actions being taken at each node. Presumably,
** when this routine is used for Walker.xExprCallback then
** Walker.xSelectCallback is set to do something useful for every
** subquery in the parser tree.
*/
int sqlite3ExprWalkNoop(Walker *NotUsed, Expr *NotUsed2){
UNUSED_PARAMETER2(NotUsed, NotUsed2);
return WRC_Continue;
}
/*
** No-op routine for the parse-tree walker for SELECT statements.
** subquery in the parser tree.
*/
int sqlite3SelectWalkNoop(Walker *NotUsed, Select *NotUsed2){
UNUSED_PARAMETER2(NotUsed, NotUsed2);
return WRC_Continue;
}