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Overview
| Comment: | Very slightly smaller and faster sqlite3WalkSelect(). |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
9bc65635b29a4991c7821ef0939975d0 |
| User & Date: | drh 2017-07-07 11:49:48 |
Context
|
2017-07-07
| ||
| 12:43 | More aggressive use of EP_Leaf on expression nodes, to help prune searches. check-in: c1a1d68c user: drh tags: trunk | |
| 11:49 | Very slightly smaller and faster sqlite3WalkSelect(). check-in: 9bc65635 user: drh tags: trunk | |
|
2017-07-06
| ||
| 22:43 | Small adjustment to main.mk that facilitates giving non-standard compile-time options to the shell. check-in: 7c7d53a9 user: drh tags: trunk | |
Changes
Changes to src/walker.c.
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SrcList *pSrc;
int i;
struct SrcList_item *pItem;
pSrc = p->pSrc;
if( ALWAYS(pSrc) ){
for(i=pSrc->nSrc, pItem=pSrc->a; i>0; i--, pItem++){
if( sqlite3WalkSelect(pWalker, pItem->pSelect) ){
return WRC_Abort;
}
if( pItem->fg.isTabFunc
&& sqlite3WalkExprList(pWalker, pItem->u1.pFuncArg)
){
return WRC_Abort;
}
................................................................................
** there is an abort request.
**
** If the Walker does not have an xSelectCallback() then this routine
** is a no-op returning WRC_Continue.
*/
int sqlite3WalkSelect(Walker *pWalker, Select *p){
int rc;
if( p==0 || pWalker->xSelectCallback==0 ) return WRC_Continue;
do{
rc = pWalker->xSelectCallback(pWalker, p);
if( rc ) return rc & WRC_Abort;
if( sqlite3WalkSelectExpr(pWalker, p)
|| sqlite3WalkSelectFrom(pWalker, p)
){
return WRC_Abort;
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>
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SrcList *pSrc;
int i;
struct SrcList_item *pItem;
pSrc = p->pSrc;
if( ALWAYS(pSrc) ){
for(i=pSrc->nSrc, pItem=pSrc->a; i>0; i--, pItem++){
if( pItem->pSelect && sqlite3WalkSelect(pWalker, pItem->pSelect) ){
return WRC_Abort;
}
if( pItem->fg.isTabFunc
&& sqlite3WalkExprList(pWalker, pItem->u1.pFuncArg)
){
return WRC_Abort;
}
................................................................................
** there is an abort request.
**
** If the Walker does not have an xSelectCallback() then this routine
** is a no-op returning WRC_Continue.
*/
int sqlite3WalkSelect(Walker *pWalker, Select *p){
int rc;
if( p==0 ) return WRC_Continue;
if( pWalker->xSelectCallback==0 ) return WRC_Continue;
do{
rc = pWalker->xSelectCallback(pWalker, p);
if( rc ) return rc & WRC_Abort;
if( sqlite3WalkSelectExpr(pWalker, p)
|| sqlite3WalkSelectFrom(pWalker, p)
){
return WRC_Abort;
|