Allow virtual table implementations to overload function that use
a column of the virtual table as their first argument. Untested. (CVS 3322) FossilOrigin-Name: 12cc7af4b6b8b4f1a43d962fbafde8cba683a907
This commit is contained in:
drh
parent
4144905b53
commit
b7f6f68f3a
26
manifest
26
manifest
@ -1,5 +1,5 @@
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C Make\sthe\ssqlite3_enable_load_extension()\sinterface\saccessible\sfrom\sthe\nTCL\sbindings.\s(CVS\s3321)
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D 2006-07-06T17:08:48
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C Allow\svirtual\stable\simplementations\sto\soverload\sfunction\sthat\suse\na\scolumn\sof\sthe\svirtual\stable\sas\stheir\sfirst\sargument.\s\sUntested.\s(CVS\s3322)
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D 2006-07-08T17:06:44
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F Makefile.in 9c2a76055c305868cc5f5b73e29a252ff3632c0a
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F Makefile.linux-gcc 2d8574d1ba75f129aba2019f0b959db380a90935
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F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
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@ -42,7 +42,7 @@ F src/complete.c 7d1a44be8f37de125fcafd3d3a018690b3799675
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F src/date.c cd2bd5d1ebc6fa12d6312f69789ae5b0a2766f2e
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F src/delete.c 804384761144fe1a5035b99f4bd7d706976831bd
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F src/experimental.c 1b2d1a6cd62ecc39610e97670332ca073c50792b
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F src/expr.c 78b521337d628b1fd9d87b12dbbe771247aab585
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F src/expr.c acfc181c473ec87e332de04f60a1e8beaa5df877
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F src/func.c f357a81bcdd83684cb198a8ad96be1c21e29f85c
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F src/hash.c 449f3d6620193aa557f5d86cbc5cc6b87702b185
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F src/hash.h 1b3f7e2609141fd571f62199fc38687d262e9564
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@ -72,9 +72,9 @@ F src/random.c d40f8d356cecbd351ccfab6eaedd7ec1b54f5261
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F src/select.c 380fa06c99ae01050c0054c4b1db91e9f1d8322d
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F src/server.c 087b92a39d883e3fa113cae259d64e4c7438bc96
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F src/shell.c 359551ab5cdd8f8fe5f3fe170fd330b108b08d7d
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F src/sqlite.h.in a1ae5f372affd1313d9bea98155f01626f538fbd
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F src/sqlite.h.in 6d96fe902d2311e007ead5d52c9f0b9f5bdc5ad9
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F src/sqlite3ext.h c611255287e9a11ce4f1fe6251c2a0b9d32a828b
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F src/sqliteInt.h e07a49b3e349c2c5f1bcb7dd9371fc3faf5ba338
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F src/sqliteInt.h ea16faa3efec989f82b8ef778aca2867440cb817
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F src/table.c d8817f43a6c6bf139487db161760b9e1e02da3f1
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F src/tclsqlite.c 0220791dc66d287a7f199568393f04f3db24364b
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F src/test1.c 535294d7f21a4127082c4f7a57f225482df9cc36
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@ -84,13 +84,13 @@ F src/test4.c 8b784cd82de158a2317cb4ac4bc86f91ad315e25
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F src/test5.c 7162f8526affb771c4ed256826eee7bb9eca265f
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F src/test6.c 60a02961ceb7b3edc25f5dc5c1ac2556622a76de
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F src/test7.c 03fa8d787f6aebc6d1f72504d52f33013ad2c8e3
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F src/test8.c 6a4d1bd453cb708738d6262641abf80ac2d13a62
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F src/test8.c 32b800e733fc80c5d847b6d2a17d4c60b1c4418c
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F src/test_async.c e3deaedd4d86a56391b81808fde9e44fbd92f1d3
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F src/test_loadext.c 22065d601a18878e5542191001f0eaa5d77c0ed8
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F src/test_md5.c 6c42bc0a3c0b54be34623ff77a0eec32b2fa96e3
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F src/test_schema.c 02f182f156e8e431a9508184df5638b370850495
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F src/test_schema.c 8b2aaa9136edf3187a51166849c2de0aaaa27ce5
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F src/test_server.c a6460daed0b92ecbc2531b6dc73717470e7a648c
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F src/test_tclvar.c 0fe60a8a7358f99d5d0c08d6822bd5b1b39b4d58
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F src/test_tclvar.c 6611657977c69bccd32b4ff7ccfb221a403ca2f0
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F src/tokenize.c 7b448440dfd6e984d6bef7ac7fc60f1d26eaf8e7
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F src/trigger.c 0fc40125820409a6274834a6e04ad804d96e2793
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F src/update.c 951f95ef044cf6d28557c48dc35cb0711a0b9129
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@ -101,10 +101,10 @@ F src/vdbe.c 3ffc96ec2e870b3ab3e59d1f6fe34687e4ed1db6
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F src/vdbe.h 258b5d1c0aaa72192f09ff0568ce42b383f156fa
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F src/vdbeInt.h e3eaab262b67b84474625cfc38aec1125c32834b
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F src/vdbeapi.c 6af0e7160af260052a7a4500464221a03dada75f
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F src/vdbeaux.c bb0a7b800a7167f2e49702a2bfc971919c0b99d1
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F src/vdbeaux.c 51722bb3661f2d836c1a7a8e7eac242859ddbd07
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F src/vdbefifo.c 9efb94c8c3f4c979ebd0028219483f88e57584f5
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F src/vdbemem.c 5f0afe3b92bb2c037f8d5d697f7c151fa50783a3
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F src/vtab.c 4751954e26e9caa6ce3ea5ad9468bd34f07d1de7
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F src/vtab.c 3fe6879f4a41606814a4eb2b9c0623fb1d2ab522
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F src/where.c 75a89957fcb8c068bec55caa4e9d2ed5fa0b0724
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F tclinstaller.tcl 046e3624671962dc50f0481d7c25b38ef803eb42
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F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
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@ -375,7 +375,7 @@ F www/tclsqlite.tcl bb0d1357328a42b1993d78573e587c6dcbc964b9
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F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
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F www/version3.tcl 890248cf7b70e60c383b0e84d77d5132b3ead42b
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F www/whentouse.tcl 97e2b5cd296f7d8057e11f44427dea8a4c2db513
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P 225a9597b21bde7666451fc2eb7695dc35c438bb
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R cceec30f57fbf4deae9e1f3246c140c4
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P ce96b890bbf2f2b9686e19bbb1111a70f6404cb5
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R e6cc629faa8ff4cdd0448656216aa349
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U drh
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Z 6a689bc7d7abe6c2c593a3ba21b7a44d
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Z d47bc48adf9981452a2ffd38517818f3
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@ -1 +1 @@
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ce96b890bbf2f2b9686e19bbb1111a70f6404cb5
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12cc7af4b6b8b4f1a43d962fbafde8cba683a907
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@ -12,7 +12,7 @@
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** This file contains routines used for analyzing expressions and
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** for generating VDBE code that evaluates expressions in SQLite.
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**
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** $Id: expr.c,v 1.262 2006/06/14 19:00:21 drh Exp $
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** $Id: expr.c,v 1.263 2006/07/08 17:06:44 drh Exp $
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*/
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#include "sqliteInt.h"
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#include <ctype.h>
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@ -1674,6 +1674,11 @@ void sqlite3ExprCode(Parse *pParse, Expr *pExpr){
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pDef = sqlite3FindFunction(pParse->db, zId, nId, nExpr, enc, 0);
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assert( pDef!=0 );
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nExpr = sqlite3ExprCodeExprList(pParse, pList);
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#ifndef SQLITE_OMIT_VIRTUALTABLE
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if( nExpr>0 ){
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pDef = sqlite3VtabOverloadFunction(pDef, nExpr, pList->a[0].pExpr);
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}
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#endif
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for(i=0; i<nExpr && i<32; i++){
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if( sqlite3ExprIsConstant(pList->a[i].pExpr) ){
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constMask |= (1<<i);
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@ -12,7 +12,7 @@
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** This header file defines the interface that the SQLite library
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** presents to client programs.
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**
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** @(#) $Id: sqlite.h.in,v 1.185 2006/06/27 15:16:15 drh Exp $
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** @(#) $Id: sqlite.h.in,v 1.186 2006/07/08 17:06:44 drh Exp $
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*/
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#ifndef _SQLITE3_H_
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#define _SQLITE3_H_
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@ -1565,6 +1565,9 @@ struct sqlite3_module {
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int (*xSync)(sqlite3_vtab *pVTab);
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int (*xCommit)(sqlite3_vtab *pVTab);
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int (*xRollback)(sqlite3_vtab *pVTab);
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int (*xFindFunction)(sqlite3_vtab *pVtab, int nArg, const char *zName,
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int (**pxFunc)(sqlite3_context*,int,sqlite3_value**),
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void **ppArg, int *piPrefEnc);
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};
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/*
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@ -11,7 +11,7 @@
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*************************************************************************
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** Internal interface definitions for SQLite.
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**
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** @(#) $Id: sqliteInt.h,v 1.517 2006/06/27 15:16:15 drh Exp $
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** @(#) $Id: sqliteInt.h,v 1.518 2006/07/08 17:06:44 drh Exp $
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*/
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#ifndef _SQLITEINT_H_
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#define _SQLITEINT_H_
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@ -586,6 +586,7 @@ struct Module {
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*/
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#define SQLITE_FUNC_LIKE 0x01 /* Candidate for the LIKE optimization */
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#define SQLITE_FUNC_CASE 0x02 /* Case-sensitive LIKE-type function */
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#define SQLITE_FUNC_EPHEM 0x04 /* Ephermeral. Delete with VDBE */
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/*
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** information about each column of an SQL table is held in an instance
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@ -1861,6 +1862,7 @@ int sqlite3VtabCallCreate(sqlite3*, int, const char *, char **);
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int sqlite3VtabCallConnect(Parse*, Table*);
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int sqlite3VtabCallDestroy(sqlite3*, int, const char *);
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int sqlite3VtabBegin(sqlite3 *, sqlite3_vtab *);
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FuncDef *sqlite3VtabOverloadFunction(FuncDef*, int nArg, Expr*);
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#ifdef SQLITE_SSE
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#include "sseInt.h"
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@ -13,7 +13,7 @@
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** is not included in the SQLite library. It is used for automated
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** testing of the SQLite library.
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**
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** $Id: test8.c,v 1.38 2006/06/26 19:10:32 drh Exp $
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** $Id: test8.c,v 1.39 2006/07/08 17:06:44 drh Exp $
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*/
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#include "sqliteInt.h"
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#include "tcl.h"
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@ -918,7 +918,8 @@ static sqlite3_module echoModule = {
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echoBegin, /* xBegin - begin transaction */
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echoSync, /* xSync - sync transaction */
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echoCommit, /* xCommit - commit transaction */
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echoRollback /* xRollback - rollback transaction */
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echoRollback, /* xRollback - rollback transaction */
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0, /* xFindMethod - function overloading */
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};
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/*
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@ -13,7 +13,7 @@
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** is not included in the SQLite library. It is used for automated
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** testing of the SQLite library.
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**
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** $Id: test_schema.c,v 1.8 2006/06/26 19:10:32 drh Exp $
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** $Id: test_schema.c,v 1.9 2006/07/08 17:06:44 drh Exp $
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*/
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/* The code in this file defines a sqlite3 virtual-table module that
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@ -281,6 +281,12 @@ static sqlite3_module schemaModule = {
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schemaEof, /* xEof */
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schemaColumn, /* xColumn - read data */
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schemaRowid, /* xRowid - read data */
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0, /* xUpdate */
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0, /* xBegin */
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0, /* xSync */
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0, /* xCommit */
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0, /* xRollback */
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0, /* xFindMethod */
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};
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** The emphasis of this file is a virtual table that provides
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** access to TCL variables.
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**
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** $Id: test_tclvar.c,v 1.6 2006/06/27 12:25:00 danielk1977 Exp $
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** $Id: test_tclvar.c,v 1.7 2006/07/08 17:06:44 drh Exp $
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*/
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#include "sqliteInt.h"
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#include "tcl.h"
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@ -267,7 +267,8 @@ static sqlite3_module tclvarModule = {
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0, /* xBegin */
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0, /* xSync */
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0, /* xCommit */
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0 /* xRollback */
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0, /* xRollback */
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0, /* xFindMethod */
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};
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/*
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@ -373,6 +373,17 @@ void sqlite3VdbeJumpHere(Vdbe *p, int addr){
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sqlite3VdbeChangeP2(p, addr, p->nOp);
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}
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/*
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** If the input FuncDef structure is ephemeral, then free it. If
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** the FuncDef is not ephermal, then do nothing.
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*/
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static void freeEphemeralFunction(FuncDef *pDef){
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if( pDef && (pDef->flags & SQLITE_FUNC_EPHEM)!=0 ){
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sqliteFree(pDef);
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}
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}
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/*
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** Delete a P3 value if necessary.
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*/
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@ -391,10 +402,15 @@ static void freeP3(int p3type, void *p3){
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}
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case P3_VDBEFUNC: {
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VdbeFunc *pVdbeFunc = (VdbeFunc *)p3;
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freeEphemeralFunction(pVdbeFunc->pFunc);
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sqlite3VdbeDeleteAuxData(pVdbeFunc, 0);
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sqliteFree(pVdbeFunc);
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break;
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}
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case P3_FUNCDEF: {
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freeEphemeralFunction((FuncDef*)p3);
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break;
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}
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case P3_MEM: {
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sqlite3ValueFree((sqlite3_value*)p3);
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break;
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62
src/vtab.c
62
src/vtab.c
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*************************************************************************
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** This file contains code used to help implement virtual tables.
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**
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** $Id: vtab.c,v 1.25 2006/06/26 11:17:51 danielk1977 Exp $
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** $Id: vtab.c,v 1.26 2006/07/08 17:06:44 drh Exp $
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*/
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#ifndef SQLITE_OMIT_VIRTUALTABLE
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#include "sqliteInt.h"
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@ -573,4 +573,64 @@ int sqlite3VtabBegin(sqlite3 *db, sqlite3_vtab *pVtab){
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return rc;
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}
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/*
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** The first parameter (pDef) is a function implementation. The
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** second parameter (pExpr) is the first argument to this function.
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** If pExpr is a column in a virtual table, then let the virtual
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** table implementation have an opportunity to overload the function.
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**
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** This routine is used to allow virtual table implementations to
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** overload MATCH, LIKE, GLOB, and REGEXP operators.
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**
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** Return either the pDef argument (indicating no change) or a
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** new FuncDef structure that is marked as ephemeral using the
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** SQLITE_FUNC_EPHEM flag.
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*/
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FuncDef *sqlite3VtabOverloadFunction(
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FuncDef *pDef, /* Function to possibly overload */
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int nArg, /* Number of arguments to the function */
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Expr *pExpr /* First argument to the function */
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){
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Table *pTab;
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sqlite3_vtab *pVtab;
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sqlite3_module *pMod;
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int (*xFunc)(sqlite3_context*,int,sqlite3_value**);
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void *pArg;
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int iEnc;
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int rc;
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FuncDef *pNew;
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/* Check to see the left operand is a column in a virtual table */
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if( pExpr==0 ) return pDef;
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if( pExpr->op!=TK_COLUMN ) return pDef;
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pTab = pExpr->pTab;
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if( pTab==0 ) return pDef;
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if( !pTab->isVirtual ) return pDef;
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pVtab = pTab->pVtab;
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assert( pVtab!=0 );
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assert( pVtab->pModule!=0 );
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pMod = pVtab->pModule;
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if( pMod->xFindFunction==0 ) return pDef;
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/* Call the xFuncFunction method on the virtual table implementation
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** to see if the implementation wants to overload this function */
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if( pMod->xFindFunction(pVtab, nArg, pDef->zName, &xFunc, &pArg, &iEnc)==0 ){
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return pDef;
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}
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/* Create a new ephemeral function definition for the overloaded
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** function */
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pNew = sqliteMalloc( sizeof(*pNew) + strlen(pDef->zName) );
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if( pNew==0 ){
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return pDef;
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}
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*pNew = *pDef;
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strcpy(pNew->zName, pDef->zName);
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pNew->xFunc = xFunc;
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pNew->pUserData = pArg;
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pNew->iPrefEnc = iEnc;
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pNew->flags |= SQLITE_FUNC_EPHEM;
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return pNew;
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}
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#endif /* SQLITE_OMIT_VIRTUALTABLE */
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