Improved reuse of subqueries associated with IN operators, especially when
the IN operator is duplicated due to predicate push-down. FossilOrigin-Name: c9a3498113074bbcd9a8c8d30286fef6c6a49ad2c84b90ec0f5a148389d6245c
This commit is contained in:
drh
commit
635c6b8086
23
manifest
23
manifest
@ -1,5 +1,5 @@
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C Add\scomment\susing\sthe\sname\s"predicate\spush-down\soptimization"\sto\swhat\swe\shave\nalso\scalled\s"WHERE-clause\spush\sdown".\s\sNo\schanges\sto\scode.
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D 2024-07-04T11:15:32.292
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C Improved\sreuse\sof\ssubqueries\sassociated\swith\sIN\soperators,\sespecially\swhen\nthe\sIN\soperator\sis\sduplicated\sdue\sto\spredicate\spush-down.
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D 2024-07-05T09:56:11.351
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F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
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F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
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F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
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@ -705,7 +705,7 @@ F src/date.c 13dd752847afb32ed70510ad7345a5b9c841f51ad904dba5d010f1fa3a6a324e
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F src/dbpage.c 80e46e1df623ec40486da7a5086cb723b0275a6e2a7b01d9f9b5da0f04ba2782
|
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F src/dbstat.c 3b677254d512fcafd4d0b341bf267b38b235ccfddbef24f9154e19360fa22e43
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F src/delete.c cb766727c78e715f9fb7ec8a7d03658ed2a3016343ca687acfcec9083cdca500
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F src/expr.c d6f614d0c90cf8d72bbd54dbae96040e7feb495a77991fdc1b1c67db68eeb326
|
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F src/expr.c 4d76a31f37302d11c89dd5184a0e1a80a95bd3f8c97e72fa2a18b64cc8672603
|
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F src/fault.c 460f3e55994363812d9d60844b2a6de88826e007
|
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F src/fkey.c 852f93c0ef995e0c2b8983059a2b97151c194cc8259e21f5bc2b7ac508348c2a
|
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F src/func.c 1f61e32e7a357e615b5d2e774bee563761fce4f2fd97ecb0f72c33e62a2ada5f
|
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@ -760,7 +760,7 @@ F src/shell.c.in b7d435c137eb323981adff814f172dbaabb9ba504fef17cb11d4681c1633ee1
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F src/sqlite.h.in 6c884a87bbf8828562b49272025a1e66e3801a196a58b0bdec87edcd2c9c8fc1
|
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F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
|
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F src/sqlite3ext.h 3f046c04ea3595d6bfda99b781926b17e672fd6d27da2ba6d8d8fc39981dcb54
|
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F src/sqliteInt.h 039b5309b49399340f260ad3d1e6b6fa13e04a7b587b9daa1e694ce0f13a04a3
|
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F src/sqliteInt.h 5f940c22e14a7434b2fbefa53407372be2eed47b43cb9f4f98c5054c565d63b2
|
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F src/sqliteLimit.h 6878ab64bdeb8c24a1d762d45635e34b96da21132179023338c93f820eee6728
|
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F src/status.c cb11f8589a6912af2da3bb1ec509a94dd8ef27df4d4c1a97e0bcf2309ece972b
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F src/table.c 0f141b58a16de7e2fbe81c308379e7279f4c6b50eb08efeec5892794a0ba30d1
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@ -826,10 +826,10 @@ F src/utf.c f23165685a67b4caf8ec08fb274cb3f319103decfb2a980b7cfd55d18dfa855e
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F src/util.c 5d1a0134cf4240648d1c6bb5cc8efaca0ea2b5d5c840985aec7e947271f04375
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F src/vacuum.c 604fcdaebe76f3497c855afcbf91b8fa5046b32de3045bab89cc008d68e40104
|
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F src/vdbe.c f941fd8dbd1a9e073866a941e7fbb553f1de2d25b249611005d8c27d5eac8995
|
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F src/vdbe.h c2d78d15112c3fc5ab87f5e8e0b75d2db1c624409de2e858c3d1aafb1650bb4f
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F src/vdbe.h c2549a215898a390de6669cfa32adba56f0d7e17ba5a7f7b14506d6fd5f0c36a
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F src/vdbeInt.h 949669dfd8a41550d27dcb905b494f2ccde9a2e6c1b0b04daa1227e2e74c2b2c
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F src/vdbeapi.c 80235ac380e9467fec1cb0883354d841f2a771976e766995f7e0c77f845406df
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F src/vdbeaux.c 6e37cb918506c28fe7657454fcbc2e01e66bfba4164f306c2f075fd5c5fef609
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F src/vdbeaux.c 25d685cafe119ff890c94345e884ea558a6b5d823bfa52ba708eb8ff3c70aa71
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F src/vdbeblob.c 13f9287b55b6356b4b1845410382d6bede203ceb29ef69388a4a3d007ffacbe5
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F src/vdbemem.c 831a244831eaa45335f9ae276b50a7a82ee10d8c46c2c72492d4eb8c98d94d89
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F src/vdbesort.c 237840ca1947511fa59bd4e18b9eeae93f2af2468c34d2427b059f896230a547
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@ -1283,7 +1283,7 @@ F test/in3.test 3cbf58c87f4052cee3a58b37b6389777505aa0c0
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F test/in4.test bb767ec1cfd1730256f0a83219f0acda36bc251b63f8b8bb7d8c7cff17875a4f
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F test/in5.test 4fd79c70dfa0681313e8cdca07f5ff0400bdc0e20f808a5c59eaef1e4b48082a
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F test/in6.test f5f40d6816a8bb7c784424b58a10ac38efb76ab29127a2c17399e0cbeeda0e4b
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F test/in7.test 742b18c284cd9a9cd1347d3a8affeee44b8de11e875e91a1d40498c18ba16441
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F test/in7.test 9256cdb30dc487f2078bb4bb30f43f2c1ff4d277a9c7c9a14bd1c9510c9c8cae
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F test/incrblob.test c9b96afc292aeff43d6687bcb09b0280aa599822
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F test/incrblob2.test a494c9e848560039a23974b9119cfc2cf3ad3bd15cc2694ee6367ae537ef8f1f
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F test/incrblob3.test 67621a04b3084113bf38ce03797d70eca012d9d8f948193b8f655df577b0da6f
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@ -1518,7 +1518,7 @@ F test/printf.test 685fec5a0c5af2490ab0632775a301554361d674211d690f5bee0a97b0533
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F test/printf2.test 3f55c1871a5a65507416076f6eb97e738d5210aeda7595a74ee895f2224cce60
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F test/progress.test ebab27f670bd0d4eb9d20d49cef96e68141d92fb
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F test/ptrchng.test ef1aa72d6cf35a2bbd0869a649b744e9d84977fc
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F test/pushdown.test 9e655df51bc6559608dcc7af89a36f727eff520b4860261ed15a5f95a5ebbcd8
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F test/pushdown.test 84b525767442b3695d671f9df59dd91cf0ed8fb24cbbcdc55959f0dadeee8b39
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F test/queryonly.test 5f653159e0f552f0552d43259890c1089391dcca
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F test/quick.test 1681febc928d686362d50057c642f77a02c62e57
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F test/quickcheck.test a4b7e878cd97e46108291c409b0bf8214f29e18fddd68a42bc5c1375ad1fb80a
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@ -2195,8 +2195,9 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
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F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
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F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
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F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
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P a204ffc06b468c2edf8f11ccf3de639edd4f8282e69a44ceeb68a4d3a43e77ea
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R 7ddaa7e2074acfdf6d0130f12e8505c2
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P be77fe701c7b7d3407800e1ed6a4c8be14035831790419cc99362bff41c65b60 99fd34b58a9b09af20f1f1a3c37137ae55159310c8af97806550eeee6adc4fc5
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R c2554732fd5d00a4bc9161c1ecfc2ecd
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T +closed 99fd34b58a9b09af20f1f1a3c37137ae55159310c8af97806550eeee6adc4fc5
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U drh
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Z 940dec88e4e92fbd5a212ce2f1e6eedc
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Z 4e117d1a68420f4abee82559a7eb0fa4
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# Remove this line to create a well-formed Fossil manifest.
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@ -1 +1 @@
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be77fe701c7b7d3407800e1ed6a4c8be14035831790419cc99362bff41c65b60
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c9a3498113074bbcd9a8c8d30286fef6c6a49ad2c84b90ec0f5a148389d6245c
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80
src/expr.c
80
src/expr.c
@ -3420,6 +3420,49 @@ void sqlite3VectorErrorMsg(Parse *pParse, Expr *pExpr){
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}
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}
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#ifndef SQLITE_OMIT_SUBQUERY
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/*
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** Scan all previously generated bytecode looking for an OP_BeginSubrtn
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** that is compatible with pExpr. If found, add the y.sub values
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** to pExpr and return true. If not found, return false.
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*/
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static int findCompatibleInRhsSubrtn(
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Parse *pParse, /* Parsing context */
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Expr *pExpr, /* IN operator with RHS that we want to reuse */
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SubrtnSig *pNewSig /* Signature for the IN operator */
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){
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VdbeOp *pOp, *pEnd;
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SubrtnSig *pSig;
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Vdbe *v;
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if( pNewSig==0 ) return 0;
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if( pParse->bHasSubrtn==0 ) return 0;
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assert( pExpr->op==TK_IN );
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assert( !ExprUseYSub(pExpr) );
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assert( ExprUseXSelect(pExpr) );
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assert( pExpr->x.pSelect!=0 );
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assert( (pExpr->x.pSelect->selFlags & SF_All)==0 );
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v = pParse->pVdbe;
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assert( v!=0 );
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pOp = sqlite3VdbeGetOp(v, 1);
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pEnd = sqlite3VdbeGetLastOp(v);
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for(; pOp<pEnd; pOp++){
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if( pOp->p4type!=P4_SUBRTNSIG ) continue;
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assert( pOp->opcode==OP_BeginSubrtn );
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pSig = pOp->p4.pSubrtnSig;
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assert( pSig!=0 );
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if( pNewSig->selId!=pSig->selId ) continue;
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if( strcmp(pNewSig->zAff,pSig->zAff)!=0 ) continue;
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pExpr->y.sub.iAddr = pSig->iAddr;
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pExpr->y.sub.regReturn = pSig->regReturn;
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pExpr->iTable = pSig->iTable;
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ExprSetProperty(pExpr, EP_Subrtn);
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return 1;
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}
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return 0;
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}
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#endif /* SQLITE_OMIT_SUBQUERY */
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#ifndef SQLITE_OMIT_SUBQUERY
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/*
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** Generate code that will construct an ephemeral table containing all terms
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@ -3469,11 +3512,28 @@ void sqlite3CodeRhsOfIN(
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** and reuse it many names.
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*/
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if( !ExprHasProperty(pExpr, EP_VarSelect) && pParse->iSelfTab==0 ){
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/* Reuse of the RHS is allowed */
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/* If this routine has already been coded, but the previous code
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** might not have been invoked yet, so invoke it now as a subroutine.
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/* Reuse of the RHS is allowed
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**
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** Compute a signature for the RHS of the IN operator to facility
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** finding and reusing prior instances of the same IN operator.
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*/
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if( ExprHasProperty(pExpr, EP_Subrtn) ){
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SubrtnSig *pSig = 0;
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assert( !ExprUseXSelect(pExpr) || pExpr->x.pSelect!=0 );
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if( ExprUseXSelect(pExpr) && (pExpr->x.pSelect->selFlags & SF_All)==0 ){
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pSig = sqlite3DbMallocRawNN(pParse->db, sizeof(pSig[0]));
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if( pSig ){
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pSig->selId = pExpr->x.pSelect->selId;
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pSig->zAff = exprINAffinity(pParse, pExpr);
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}
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}
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/* Check to see if there is a prior materialization of the RHS of
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** this IN operator. If there is, then make use of that prior
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** materialization rather than recomputing it.
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*/
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if( ExprHasProperty(pExpr, EP_Subrtn)
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|| findCompatibleInRhsSubrtn(pParse, pExpr, pSig)
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){
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addrOnce = sqlite3VdbeAddOp0(v, OP_Once); VdbeCoverage(v);
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if( ExprUseXSelect(pExpr) ){
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ExplainQueryPlan((pParse, 0, "REUSE LIST SUBQUERY %d",
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@ -3485,6 +3545,10 @@ void sqlite3CodeRhsOfIN(
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assert( iTab!=pExpr->iTable );
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sqlite3VdbeAddOp2(v, OP_OpenDup, iTab, pExpr->iTable);
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sqlite3VdbeJumpHere(v, addrOnce);
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if( pSig ){
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sqlite3DbFree(pParse->db, pSig->zAff);
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sqlite3DbFree(pParse->db, pSig);
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}
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return;
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}
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@ -3495,7 +3559,13 @@ void sqlite3CodeRhsOfIN(
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pExpr->y.sub.regReturn = ++pParse->nMem;
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pExpr->y.sub.iAddr =
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sqlite3VdbeAddOp2(v, OP_BeginSubrtn, 0, pExpr->y.sub.regReturn) + 1;
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if( pSig ){
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pSig->iAddr = pExpr->y.sub.iAddr;
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pSig->regReturn = pExpr->y.sub.regReturn;
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pSig->iTable = iTab;
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sqlite3VdbeChangeP4(v, -1, (const char*)pSig, P4_SUBRTNSIG);
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pParse->bHasSubrtn = 1;
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}
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addrOnce = sqlite3VdbeAddOp0(v, OP_Once); VdbeCoverage(v);
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}
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@ -3834,6 +3834,7 @@ struct Parse {
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u8 prepFlags; /* SQLITE_PREPARE_* flags */
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u8 withinRJSubrtn; /* Nesting level for RIGHT JOIN body subroutines */
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u8 bHasWith; /* True if statement contains WITH */
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u8 bHasSubrtn; /* True if any P4_SUBRTNSIG has been set */
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#if defined(SQLITE_DEBUG) || defined(SQLITE_COVERAGE_TEST)
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u8 earlyCleanup; /* OOM inside sqlite3ParserAddCleanup() */
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#endif
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15
src/vdbe.h
15
src/vdbe.h
@ -32,6 +32,19 @@ typedef struct Vdbe Vdbe;
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*/
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typedef struct sqlite3_value Mem;
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typedef struct SubProgram SubProgram;
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typedef struct SubrtnSig SubrtnSig;
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/*
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** A signature for a reusable subroutine that materializes the RHS of
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** an IN operator.
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*/
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struct SubrtnSig {
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int selId; /* SELECT-id for the SELECT statement on the RHS */
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char *zAff; /* Affinity of the overall IN expression */
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int iTable; /* Ephemeral table generated by the subroutine */
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int iAddr; /* Subroutine entry address */
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int regReturn; /* Register used to hold return address */
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};
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/*
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** A single instruction of the virtual machine has an opcode
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@ -60,6 +73,7 @@ struct VdbeOp {
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u32 *ai; /* Used when p4type is P4_INTARRAY */
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SubProgram *pProgram; /* Used when p4type is P4_SUBPROGRAM */
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Table *pTab; /* Used when p4type is P4_TABLE */
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SubrtnSig *pSubrtnSig; /* Used when p4type is P4_SUBRTNSIG */
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#ifdef SQLITE_ENABLE_CURSOR_HINTS
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Expr *pExpr; /* Used when p4type is P4_EXPR */
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#endif
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@ -127,6 +141,7 @@ typedef struct VdbeOpList VdbeOpList;
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#define P4_INTARRAY (-14) /* P4 is a vector of 32-bit integers */
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#define P4_FUNCCTX (-15) /* P4 is a pointer to an sqlite3_context object */
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#define P4_TABLEREF (-16) /* Like P4_TABLE, but reference counted */
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#define P4_SUBRTNSIG (-17) /* P4 is a SubrtnSig pointer */
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/* Error message codes for OP_Halt */
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#define P5_ConstraintNotNull 1
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@ -1413,6 +1413,12 @@ static void freeP4(sqlite3 *db, int p4type, void *p4){
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if( db->pnBytesFreed==0 ) sqlite3DeleteTable(db, (Table*)p4);
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break;
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}
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case P4_SUBRTNSIG: {
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SubrtnSig *pSig = (SubrtnSig*)p4;
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sqlite3DbFree(db, pSig->zAff);
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sqlite3DbFree(db, pSig);
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break;
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}
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}
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}
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@ -1992,6 +1998,11 @@ char *sqlite3VdbeDisplayP4(sqlite3 *db, Op *pOp){
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zP4 = pOp->p4.pTab->zName;
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break;
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}
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case P4_SUBRTNSIG: {
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SubrtnSig *pSig = pOp->p4.pSubrtnSig;
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sqlite3_str_appendf(&x, "subrtnsig:%d,%s", pSig->selId, pSig->zAff);
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break;
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}
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default: {
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zP4 = pOp->p4.z;
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}
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@ -137,5 +137,61 @@ do_execsql_test 2.1 {
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SELECT b FROM t1 WHERE a IN (1,2,3) ORDER BY b ASC NULLS LAST;
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} {one three {}}
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#-------------------------------------------------------------------------
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reset_db
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do_execsql_test 3.0 {
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CREATE TABLE x1(a);
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INSERT INTO x1 VALUES(1), (2), (3);
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CREATE TABLE x2(b);
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INSERT INTO x2 VALUES(4), (5), (6);
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CREATE TABLE t1(u);
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INSERT INTO t1 VALUES(1), (2), (3), (4), (5), (6);
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CREATE VIEW v1 AS SELECT u FROM t1 WHERE u IN (
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SELECT a FROM x1
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);
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CREATE VIEW v2 AS SELECT u FROM t1 WHERE u IN (
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SELECT b FROM x2
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);
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}
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do_execsql_test 3.1 {
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SELECT * FROM v1
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} {
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1 2 3
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}
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do_execsql_test 3.2 {
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SELECT * FROM v2
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} {
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4 5 6
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}
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do_execsql_test 3.3 {
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SELECT * FROM v2
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UNION ALL
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SELECT * FROM v1
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} {
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4 5 6
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1 2 3
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}
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do_execsql_test 3.4 {
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||||
WITH w1 AS (
|
||||
SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3
|
||||
),
|
||||
w2 AS (
|
||||
SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6
|
||||
)
|
||||
SELECT * FROM v1 WHERE u IN w1
|
||||
UNION ALL
|
||||
SELECT * FROM v2 WHERE u IN w2
|
||||
} {
|
||||
1 2 3 4 5 6
|
||||
}
|
||||
|
||||
|
||||
|
||||
finish_test
|
||||
|
||||
@ -279,13 +279,9 @@ do_eqp_test 6.1 {
|
||||
| | `--CREATE BLOOM FILTER
|
||||
| `--UNION ALL
|
||||
| |--SEARCH t02 USING INDEX t02x (w=? AND x=? AND y>? AND y<?)
|
||||
| `--LIST SUBQUERY xxxxxx
|
||||
| |--SCAN k
|
||||
| `--CREATE BLOOM FILTER
|
||||
| `--REUSE LIST SUBQUERY xxxxxx
|
||||
|--SEARCH t0
|
||||
`--LIST SUBQUERY xxxxxx
|
||||
|--SCAN k
|
||||
`--CREATE BLOOM FILTER
|
||||
`--REUSE LIST SUBQUERY xxxxxx
|
||||
}
|
||||
# ^^^^--- The key feature above is that the SEARCH for each subquery
|
||||
# uses all three fields of the index w, x, and y. Prior to the push-down
|
||||
@ -307,17 +303,9 @@ do_eqp_test 6.2 {
|
||||
| | `--CREATE BLOOM FILTER
|
||||
| `--UNION ALL
|
||||
| |--SEARCH t02 USING INDEX t02x (w=? AND x=? AND y>? AND y<?)
|
||||
| `--LIST SUBQUERY xxxxxx
|
||||
| |--CO-ROUTINE v1
|
||||
| | `--SCAN 3 CONSTANT ROWS
|
||||
| |--SCAN v1
|
||||
| `--CREATE BLOOM FILTER
|
||||
| `--REUSE LIST SUBQUERY xxxxxx
|
||||
|--SEARCH t0
|
||||
`--LIST SUBQUERY xxxxxx
|
||||
|--CO-ROUTINE v1
|
||||
| `--SCAN 3 CONSTANT ROWS
|
||||
|--SCAN v1
|
||||
`--CREATE BLOOM FILTER
|
||||
`--REUSE LIST SUBQUERY xxxxxx
|
||||
}
|
||||
do_eqp_test 6.3 {
|
||||
SELECT max(z) FROM t0 WHERE w=123 AND x IN k1 AND y BETWEEN 44 AND 55;
|
||||
@ -332,13 +320,9 @@ do_eqp_test 6.3 {
|
||||
| | `--CREATE BLOOM FILTER
|
||||
| `--UNION ALL
|
||||
| |--SEARCH t02 USING INDEX t02x (w=? AND x=? AND y>? AND y<?)
|
||||
| `--LIST SUBQUERY xxxxxx
|
||||
| |--SCAN k1
|
||||
| `--CREATE BLOOM FILTER
|
||||
| `--REUSE LIST SUBQUERY xxxxxx
|
||||
|--SEARCH t0
|
||||
`--LIST SUBQUERY xxxxxx
|
||||
|--SCAN k1
|
||||
`--CREATE BLOOM FILTER
|
||||
`--REUSE LIST SUBQUERY xxxxxx
|
||||
}
|
||||
|
||||
finish_test
|
||||
|
||||
Loading…
Reference in New Issue
Block a user