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Overview
| Comment: | Minor bug fixes and performance enhancement. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | materialized-view-reuse |
| Files: | files | file ages | folders |
| SHA3-256: | b2aae559581d05e4e8caaddfbd137cb2 |
| User & Date: | drh 2017-05-01 16:37:20 |
Context
|
2017-05-01
| ||
| 17:04 | Futher bug fixes to the function that determines when a materialized view can be reused. Closed-Leaf check-in: c64fe3a1 user: drh tags: materialized-view-reuse | |
| 16:37 | Minor bug fixes and performance enhancement. check-in: b2aae559 user: drh tags: materialized-view-reuse | |
| 15:15 | Initial implementation of an optimization that attempts to reuse the same materialization of a view on a self-join of the view. check-in: 478c34b9 user: drh tags: materialized-view-reuse | |
Changes
Changes to src/select.c.
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SrcList *pTabList, /* Search for self-joins in this FROM clause */
struct SrcList_item *pThis /* Search for prior reference to this subquery */
){
struct SrcList_item *pItem;
for(pItem = pTabList->a; pItem<pThis; pItem++){
if( pItem->pSelect==0 ) continue;
if( pItem->fg.viaCoroutine ) continue;
if( sqlite3StrICmp(pItem->zName, pThis->zName)==0 ) return pItem;
}
return 0;
}
/*
** Generate code for the SELECT statement given in the p argument.
**
|
> > | |
4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 |
SrcList *pTabList, /* Search for self-joins in this FROM clause */
struct SrcList_item *pThis /* Search for prior reference to this subquery */
){
struct SrcList_item *pItem;
for(pItem = pTabList->a; pItem<pThis; pItem++){
if( pItem->pSelect==0 ) continue;
if( pItem->fg.viaCoroutine ) continue;
if( pItem->zName==0 ) continue;
if( sqlite3_stricmp(pItem->zDatabase, pThis->zDatabase)!=0 ) continue;
if( sqlite3_stricmp(pItem->zName, pThis->zName)==0 ) return pItem;
}
return 0;
}
/*
** Generate code for the SELECT statement given in the p argument.
**
|
Changes to src/vdbeaux.c.
2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 |
assert( pCx->pBtx==0 || pCx->eCurType==CURTYPE_BTREE );
switch( pCx->eCurType ){
case CURTYPE_SORTER: {
sqlite3VdbeSorterClose(p->db, pCx);
break;
}
case CURTYPE_BTREE: {
if( pCx->pBtx ){
sqlite3BtreeClose(pCx->pBtx);
/* The pCx->pCursor will be close automatically, if it exists, by
** the call above. */
}else if( !pCx->isEphemeral ){
assert( pCx->uc.pCursor!=0 );
sqlite3BtreeCloseCursor(pCx->uc.pCursor);
}
break;
}
#ifndef SQLITE_OMIT_VIRTUALTABLE
case CURTYPE_VTAB: {
|
| | | |
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assert( pCx->pBtx==0 || pCx->eCurType==CURTYPE_BTREE );
switch( pCx->eCurType ){
case CURTYPE_SORTER: {
sqlite3VdbeSorterClose(p->db, pCx);
break;
}
case CURTYPE_BTREE: {
if( pCx->isEphemeral ){
if( pCx->pBtx ) sqlite3BtreeClose(pCx->pBtx);
/* The pCx->pCursor will be close automatically, if it exists, by
** the call above. */
}else{
assert( pCx->uc.pCursor!=0 );
sqlite3BtreeCloseCursor(pCx->uc.pCursor);
}
break;
}
#ifndef SQLITE_OMIT_VIRTUALTABLE
case CURTYPE_VTAB: {
|