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Overview
| Comment: | Fix an issue with the OmitNoopJoin optimization and add test cases that are specifically for that optimization. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
5480d124b74c9adaacc4fa9cb8156086 |
| User & Date: | drh 2013-06-28 13:43:33 |
Context
|
2013-06-28
| ||
| 17:29 | Add a bit to the SQLITE_TESTCTRL_OPTIMIZATIONS option for sqlite3_file_control() that will disable the use of SQLITE_STAT3 information in the query planner. check-in: 60c19b86 user: drh tags: trunk | |
| 13:43 | Fix an issue with the OmitNoopJoin optimization and add test cases that are specifically for that optimization. check-in: 5480d124 user: drh tags: trunk | |
| 01:24 | Refactor the Vdbe.noIO field as Vdbe.bIsReader. The meaning is inverted. check-in: 59f98c5c user: drh tags: trunk | |
Changes
Changes to src/test1.c.
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const char *zOpt;
int onoff;
int mask = 0;
static const struct {
const char *zOptName;
int mask;
} aOpt[] = {
{ "all", SQLITE_AllOpts },
{ "query-flattener", SQLITE_QueryFlattener },
{ "column-cache", SQLITE_ColumnCache },
{ "groupby-order", SQLITE_GroupByOrder },
{ "factor-constants", SQLITE_FactorOutConst },
{ "real-as-int", SQLITE_IdxRealAsInt },
{ "distinct-opt", SQLITE_DistinctOpt },
{ "cover-idx-scan", SQLITE_CoverIdxScan },
{ "order-by-idx-join",SQLITE_OrderByIdxJoin },
};
if( objc!=4 ){
Tcl_WrongNumArgs(interp, 1, objv, "DB OPT BOOLEAN");
return TCL_ERROR;
}
if( getDbPointer(interp, Tcl_GetString(objv[1]), &db) ) return TCL_ERROR;
................................................................................
}
}
if( onoff ) mask = ~mask;
if( i>=sizeof(aOpt)/sizeof(aOpt[0]) ){
Tcl_AppendResult(interp, "unknown optimization - should be one of:",
(char*)0);
for(i=0; i<sizeof(aOpt)/sizeof(aOpt[0]); i++){
Tcl_AppendResult(interp, " ", aOpt[i].zOptName);
}
return TCL_ERROR;
}
sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS, db, mask);
return TCL_OK;
}
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const char *zOpt;
int onoff;
int mask = 0;
static const struct {
const char *zOptName;
int mask;
} aOpt[] = {
{ "all", SQLITE_AllOpts },
{ "none", 0 },
{ "query-flattener", SQLITE_QueryFlattener },
{ "column-cache", SQLITE_ColumnCache },
{ "groupby-order", SQLITE_GroupByOrder },
{ "factor-constants", SQLITE_FactorOutConst },
{ "real-as-int", SQLITE_IdxRealAsInt },
{ "distinct-opt", SQLITE_DistinctOpt },
{ "cover-idx-scan", SQLITE_CoverIdxScan },
{ "order-by-idx-join", SQLITE_OrderByIdxJoin },
{ "transitive", SQLITE_Transitive },
{ "subquery-coroutine", SQLITE_SubqCoroutine },
{ "omit-noop-join", SQLITE_OmitNoopJoin },
};
if( objc!=4 ){
Tcl_WrongNumArgs(interp, 1, objv, "DB OPT BOOLEAN");
return TCL_ERROR;
}
if( getDbPointer(interp, Tcl_GetString(objv[1]), &db) ) return TCL_ERROR;
................................................................................
}
}
if( onoff ) mask = ~mask;
if( i>=sizeof(aOpt)/sizeof(aOpt[0]) ){
Tcl_AppendResult(interp, "unknown optimization - should be one of:",
(char*)0);
for(i=0; i<sizeof(aOpt)/sizeof(aOpt[0]); i++){
Tcl_AppendResult(interp, " ", aOpt[i].zOptName, (char*)0);
}
return TCL_ERROR;
}
sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS, db, mask);
return TCL_OK;
}
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Changes to src/where.c.
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if( pWInfo->nLevel>=2
&& pResultSet!=0
&& OptimizationEnabled(db, SQLITE_OmitNoopJoin)
){
Bitmask tabUsed = exprListTableUsage(pMaskSet, pResultSet);
if( pOrderBy ) tabUsed |= exprListTableUsage(pMaskSet, pOrderBy);
while( pWInfo->nLevel>=2 ){
pLoop = pWInfo->a[pWInfo->nLevel-1].pWLoop;
if( (pWInfo->pTabList->a[pLoop->iTab].jointype & JT_LEFT)==0 ) break;
if( (wctrlFlags & WHERE_WANT_DISTINCT)==0
&& (pLoop->wsFlags & WHERE_ONEROW)==0
){
break;
}
if( (tabUsed & pLoop->maskSelf)!=0 ) break;
WHERETRACE(0xffff, ("-> drop loop %c not used\n", pLoop->cId));
pWInfo->nLevel--;
nTabList--;
}
}
WHERETRACE(0xffff,("*** Optimizer Finished ***\n"));
pWInfo->pParse->nQueryLoop += pWInfo->nRowOut;
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if( pWInfo->nLevel>=2
&& pResultSet!=0
&& OptimizationEnabled(db, SQLITE_OmitNoopJoin)
){
Bitmask tabUsed = exprListTableUsage(pMaskSet, pResultSet);
if( pOrderBy ) tabUsed |= exprListTableUsage(pMaskSet, pOrderBy);
while( pWInfo->nLevel>=2 ){
WhereTerm *pTerm, *pEnd;
pLoop = pWInfo->a[pWInfo->nLevel-1].pWLoop;
if( (pWInfo->pTabList->a[pLoop->iTab].jointype & JT_LEFT)==0 ) break;
if( (wctrlFlags & WHERE_WANT_DISTINCT)==0
&& (pLoop->wsFlags & WHERE_ONEROW)==0
){
break;
}
if( (tabUsed & pLoop->maskSelf)!=0 ) break;
pEnd = sWLB.pWC->a + sWLB.pWC->nTerm;
for(pTerm=sWLB.pWC->a; pTerm<pEnd; pTerm++){
if( (pTerm->prereqAll & pLoop->maskSelf)!=0
&& !ExprHasProperty(pTerm->pExpr, EP_FromJoin)
){
break;
}
}
if( pTerm<pEnd ) break;
WHERETRACE(0xffff, ("-> drop loop %c not used\n", pLoop->cId));
pWInfo->nLevel--;
nTabList--;
}
}
WHERETRACE(0xffff,("*** Optimizer Finished ***\n"));
pWInfo->pParse->nQueryLoop += pWInfo->nRowOut;
|
Changes to test/where3.test.
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do_test where3-6.$cnt.8 {
set sql "SELECT * FROM t6w NATURAL JOIN t6x NATURAL JOIN t6y"
append sql " JOIN t6z USING(a) "
append sql $::predicate
db eval $sql
} {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
}
finish_test
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do_test where3-6.$cnt.8 {
set sql "SELECT * FROM t6w NATURAL JOIN t6x NATURAL JOIN t6y"
append sql " JOIN t6z USING(a) "
append sql $::predicate
db eval $sql
} {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine}
}
do_execsql_test where3-7-setup {
CREATE TABLE t71(x1 INTEGER PRIMARY KEY, y1);
CREATE TABLE t72(x2 INTEGER PRIMARY KEY, y2);
CREATE TABLE t73(x3, y3);
CREATE TABLE t74(x4, y4);
INSERT INTO t71 VALUES(123,234);
INSERT INTO t72 VALUES(234,345);
INSERT INTO t73 VALUES(123,234);
INSERT INTO t74 VALUES(234,345);
INSERT INTO t74 VALUES(234,678);
} {}
foreach disabled_opt {none omit-noop-join all} {
optimization_control db all 1
optimization_control db $disabled_opt 0
do_execsql_test where3-7.$disabled_opt.1 {
SELECT x1 FROM t71 LEFT JOIN t72 ON x2=y1;
} {123}
do_execsql_test where3-7.$disabled_opt.2 {
SELECT x1 FROM t71 LEFT JOIN t72 ON x2=y1 WHERE y2 IS NULL;
} {}
do_execsql_test where3-7.$disabled_opt.3 {
SELECT x1 FROM t71 LEFT JOIN t72 ON x2=y1 WHERE y2 IS NOT NULL;
} {123}
do_execsql_test where3-7.$disabled_opt.4 {
SELECT x1 FROM t71 LEFT JOIN t72 ON x2=y1 AND y2 IS NULL;
} {123}
do_execsql_test where3-7.$disabled_opt.5 {
SELECT x1 FROM t71 LEFT JOIN t72 ON x2=y1 AND y2 IS NOT NULL;
} {123}
do_execsql_test where3-7.$disabled_opt.6 {
SELECT x3 FROM t73 LEFT JOIN t72 ON x2=y3;
} {123}
do_execsql_test where3-7.$disabled_opt.7 {
SELECT DISTINCT x3 FROM t73 LEFT JOIN t72 ON x2=y3;
} {123}
do_execsql_test where3-7.$disabled_opt.8 {
SELECT x3 FROM t73 LEFT JOIN t74 ON x4=y3;
} {123 123}
do_execsql_test where3-7.$disabled_opt.9 {
SELECT DISTINCT x3 FROM t73 LEFT JOIN t74 ON x4=y3;
} {123}
}
finish_test
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