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Disable the reuse of IN-clause subqueries if the subquery is an explicit

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"SELECT ALL".  The ALL keyword is almost never used in actual practice (most
developers don't even know it can be used) so this should not interfere with
the optimization, but it does give us a convenient way to turn it off for
testing purposes.

FossilOrigin-Name: a81299be2ce203dcc28e7d0ba24791cbfba80e1ee3e1564469a226cac8adb17d
This commit is contained in:
drh 2024-07-04 18:26:41 +00:00
parent 6c23f1941b
commit 42305fc126
3 changed files with 13 additions and 13 deletions
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14
manifest
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@ -1,5 +1,5 @@
C Update\sEXPLAIN\soutput\sto\sinclude\sP4_SUBRTNSIG.
D 2024-07-04T17:49:34.845
C Disable\sthe\sreuse\sof\sIN-clause\ssubqueries\sif\sthe\ssubquery\sis\san\sexplicit\n"SELECT\sALL".\s\sThe\sALL\skeyword\sis\salmost\snever\sused\sin\sactual\spractice\s(most\ndevelopers\sdon't\seven\sknow\sit\scan\sbe\sused)\sso\sthis\sshould\snot\sinterfere\swith\nthe\soptimization,\sbut\sit\sdoes\sgive\sus\sa\sconvenient\sway\sto\sturn\sit\soff\sfor\ntesting\spurposes.
D 2024-07-04T18:26:41.697
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@ -705,7 +705,7 @@ F src/date.c 13dd752847afb32ed70510ad7345a5b9c841f51ad904dba5d010f1fa3a6a324e
F src/dbpage.c 80e46e1df623ec40486da7a5086cb723b0275a6e2a7b01d9f9b5da0f04ba2782
F src/dbstat.c 3b677254d512fcafd4d0b341bf267b38b235ccfddbef24f9154e19360fa22e43
F src/delete.c cb766727c78e715f9fb7ec8a7d03658ed2a3016343ca687acfcec9083cdca500
F src/expr.c 06c1d1a0f8b5025f001bc8219ac63fded7c33494a1863afdc78032ed1085ffef
F src/expr.c dd797fc96a5be012283ea1a42d8444dd97e12300769007c242fb5ed48f90d7e3
F src/fault.c 460f3e55994363812d9d60844b2a6de88826e007
F src/fkey.c 852f93c0ef995e0c2b8983059a2b97151c194cc8259e21f5bc2b7ac508348c2a
F src/func.c 1f61e32e7a357e615b5d2e774bee563761fce4f2fd97ecb0f72c33e62a2ada5f
@ -2195,8 +2195,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
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F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
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R 038e67018e45d309cbfa350b0e65e1eb
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Z 639a0b5da2cedf3c0b33a56e08aa9e79
# Remove this line to create a well-formed Fossil manifest.

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@ -1 +1 @@
61e56923c80d72d6467ec703b4946b251abf591649fa9e8e579667d7cbd25682
a81299be2ce203dcc28e7d0ba24791cbfba80e1ee3e1564469a226cac8adb17d

10
src/expr.c
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@ -3439,6 +3439,8 @@ static int findCompatibleInRhsSubrtn(
assert( pExpr->op==TK_IN );
assert( !ExprUseYSub(pExpr) );
assert( ExprUseXSelect(pExpr) );
assert( pExpr->x.pSelect!=0 );
assert( (pExpr->x.pSelect->selFlags & SF_All)==0 );
v = pParse->pVdbe;
assert( v!=0 );
pOp = sqlite3VdbeGetOp(v, 1);
@ -3514,11 +3516,9 @@ void sqlite3CodeRhsOfIN(
** Compute a signature for the RHS of the IN operator to facility
** finding and reusing prior instances of the same IN operator.
*/
SubrtnSig *pSig;
if( !ExprUseXSelect(pExpr) ){
pSig = 0;
}else{
assert( pExpr->x.pSelect!=0 );
SubrtnSig *pSig = 0;
assert( !ExprUseXSelect(pExpr) || pExpr->x.pSelect!=0 );
if( ExprUseXSelect(pExpr) && (pExpr->x.pSelect->selFlags & SF_All)==0 ){
pSig = sqlite3DbMallocRawNN(pParse->db, sizeof(pSig[0]));
if( pSig ){
pSig->selId = pExpr->x.pSelect->selId;