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Overview
| Comment: | Extra ".selecttrace" output following aggregate analysis. No changes to production builds. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
6fbf74ab3189b9cb20cf7cc8db0226eb |
| User & Date: | drh 2017-10-26 18:43:19.787 |
Context
|
2017-10-26
| ||
| 20:04 | Enhance the min/max optimization so that it works with indexes on expressions. (check-in: 6caec9082b user: drh tags: trunk) | |
| 18:43 | Extra ".selecttrace" output following aggregate analysis. No changes to production builds. (check-in: 6fbf74ab31 user: drh tags: trunk) | |
| 15:21 | Fix a bug causing "make amalgmation-autoconf" to create an invalid package if either the current or parent directory contains a file named install.sh or install-sh. (check-in: e1faa78594 user: dan tags: trunk) | |
Changes
Changes to src/select.c.
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assert( !ExprHasProperty(sAggInfo.aFunc[i].pExpr, EP_xIsSelect) );
sNC.ncFlags |= NC_InAggFunc;
sqlite3ExprAnalyzeAggList(&sNC, sAggInfo.aFunc[i].pExpr->x.pList);
sNC.ncFlags &= ~NC_InAggFunc;
}
sAggInfo.mxReg = pParse->nMem;
if( db->mallocFailed ) goto select_end;
/* Processing for aggregates with GROUP BY is very different and
** much more complex than aggregates without a GROUP BY.
*/
if( pGroupBy ){
KeyInfo *pKeyInfo; /* Keying information for the group by clause */
int addr1; /* A-vs-B comparision jump */
| > > > > > > > > > > > > > > > > > > | 5655 5656 5657 5658 5659 5660 5661 5662 5663 5664 5665 5666 5667 5668 5669 5670 5671 5672 5673 5674 5675 5676 5677 5678 5679 5680 5681 5682 5683 5684 5685 5686 |
assert( !ExprHasProperty(sAggInfo.aFunc[i].pExpr, EP_xIsSelect) );
sNC.ncFlags |= NC_InAggFunc;
sqlite3ExprAnalyzeAggList(&sNC, sAggInfo.aFunc[i].pExpr->x.pList);
sNC.ncFlags &= ~NC_InAggFunc;
}
sAggInfo.mxReg = pParse->nMem;
if( db->mallocFailed ) goto select_end;
#if SELECTTRACE_ENABLED
if( sqlite3SelectTrace & 0x400 ){
int ii;
SELECTTRACE(0x400,pParse,p,("After aggregate analysis:\n"));
sqlite3TreeViewSelect(0, p, 0);
for(ii=0; ii<sAggInfo.nColumn; ii++){
sqlite3DebugPrintf("agg-column[%d] iMem=%d\n",
ii, sAggInfo.aCol[ii].iMem);
sqlite3TreeViewExpr(0, sAggInfo.aCol[ii].pExpr, 0);
}
for(ii=0; ii<sAggInfo.nFunc; ii++){
sqlite3DebugPrintf("agg-func[%d]: iMem=%d\n",
ii, sAggInfo.aFunc[ii].iMem);
sqlite3TreeViewExpr(0, sAggInfo.aFunc[ii].pExpr, 0);
}
}
#endif
/* Processing for aggregates with GROUP BY is very different and
** much more complex than aggregates without a GROUP BY.
*/
if( pGroupBy ){
KeyInfo *pKeyInfo; /* Keying information for the group by clause */
int addr1; /* A-vs-B comparision jump */
|
| ︙ | ︙ | |||
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{
/* Check if the query is of one of the following forms:
**
** SELECT min(x) FROM ...
** SELECT max(x) FROM ...
**
** If it is, then ask the code in where.c to attempt to sort results
| | | 5970 5971 5972 5973 5974 5975 5976 5977 5978 5979 5980 5981 5982 5983 5984 |
{
/* Check if the query is of one of the following forms:
**
** SELECT min(x) FROM ...
** SELECT max(x) FROM ...
**
** If it is, then ask the code in where.c to attempt to sort results
** as if there was an "ORDER BY x" or "ORDER BY x DESC" clause.
** If where.c is able to produce results sorted in this order, then
** add vdbe code to break out of the processing loop after the
** first iteration (since the first iteration of the loop is
** guaranteed to operate on the row with the minimum or maximum
** value of x, the only row required).
**
** A special flag must be passed to sqlite3WhereBegin() to slightly
|
| ︙ | ︙ |