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Overview
| Comment: | Add a prototype "group_concat()" aggregate function to func.c. Disabled by default. No documentation nor test cases. No effort to make it efficient. (CVS 4519) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
61987a89d1c4af59c745d1c5f17bab33 |
| User & Date: | drh 2007-11-01 17:38:31 |
Context
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2007-11-02
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| 09:07 | Add some assert() statements to the asychronous backend demo to enforce the strategy used to avoid deadlock. Also a minor change to avoid a potential deadlock. (CVS 4520) check-in: 6340ca5e user: danielk1977 tags: trunk | |
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2007-11-01
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| 17:38 | Add a prototype "group_concat()" aggregate function to func.c. Disabled by default. No documentation nor test cases. No effort to make it efficient. (CVS 4519) check-in: 61987a89 user: drh tags: trunk | |
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2007-10-30
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| 17:28 | Avoid leaking a file descriptor after a malloc failure on unix. (CVS 4518) check-in: c249d5da user: danielk1977 tags: trunk | |
Changes
Changes to src/func.c.
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** This file contains the C functions that implement various SQL ** functions of SQLite. ** ** There is only one exported symbol in this file - the function ** sqliteRegisterBuildinFunctions() found at the bottom of the file. ** All other code has file scope. ** ** $Id: func.c,v 1.175 2007/10/12 19:11:55 drh Exp $ */ #include "sqliteInt.h" #include <ctype.h> #include <stdlib.h> #include <assert.h> #include "vdbeInt.h" ................................................................................ if( pRes->flags ){ sqlite3_result_value(context, pRes); } sqlite3VdbeMemRelease(pRes); } } /* ** This function registered all of the above C functions as SQL ** functions. This should be the only routine in this file with ** external linkage. */ void sqlite3RegisterBuiltinFunctions(sqlite3 *db){ ................................................................................ { "min", 1, 0, 1, minmaxStep, minMaxFinalize }, { "max", 1, 1, 1, minmaxStep, minMaxFinalize }, { "sum", 1, 0, 0, sumStep, sumFinalize }, { "total", 1, 0, 0, sumStep, totalFinalize }, { "avg", 1, 0, 0, sumStep, avgFinalize }, { "count", 0, 0, 0, countStep, countFinalize }, { "count", 1, 0, 0, countStep, countFinalize }, }; int i; for(i=0; i<sizeof(aFuncs)/sizeof(aFuncs[0]); i++){ void *pArg; u8 argType = aFuncs[i].argType; if( argType==0xff ){ |
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** This file contains the C functions that implement various SQL ** functions of SQLite. ** ** There is only one exported symbol in this file - the function ** sqliteRegisterBuildinFunctions() found at the bottom of the file. ** All other code has file scope. ** ** $Id: func.c,v 1.176 2007/11/01 17:38:31 drh Exp $ */ #include "sqliteInt.h" #include <ctype.h> #include <stdlib.h> #include <assert.h> #include "vdbeInt.h" ................................................................................ if( pRes->flags ){ sqlite3_result_value(context, pRes); } sqlite3VdbeMemRelease(pRes); } } #ifdef SQLITE_GROUP_CONCAT /* ** group_concat(EXPR, ?SEPARATOR?) */ static void groupConcatStep( sqlite3_context *context, int argc, sqlite3_value **argv ){ const char *zVal; char **pzAccumulator; const char *zSep; if( sqlite3_value_type(argv[0])==SQLITE_NULL ) return; zVal = sqlite3_value_text(argv[0]); pzAccumulator = (char**)sqlite3_aggregate_context(context, sizeof(char*)); if( pzAccumulator ){ if( *pzAccumulator==0 ){ *pzAccumulator = sqlite3_mprintf("%s", zVal); }else{ if( argc==2 ){ zSep = sqlite3_value_text(argv[1]); }else{ zSep = ","; } *pzAccumulator = sqlite3_mprintf("%z%s%s", *pzAccumulator, zSep, zVal); } } } static void groupConcatFinalize(sqlite3_context *context){ char **pzAccum; pzAccum = sqlite3_aggregate_context(context, 0); if( pzAccum ){ sqlite3_result_text(context, *pzAccum, -1, sqlite3_free); } } #endif /*SQLITE_GROUP_CONCAT*/ /* ** This function registered all of the above C functions as SQL ** functions. This should be the only routine in this file with ** external linkage. */ void sqlite3RegisterBuiltinFunctions(sqlite3 *db){ ................................................................................ { "min", 1, 0, 1, minmaxStep, minMaxFinalize }, { "max", 1, 1, 1, minmaxStep, minMaxFinalize }, { "sum", 1, 0, 0, sumStep, sumFinalize }, { "total", 1, 0, 0, sumStep, totalFinalize }, { "avg", 1, 0, 0, sumStep, avgFinalize }, { "count", 0, 0, 0, countStep, countFinalize }, { "count", 1, 0, 0, countStep, countFinalize }, #ifdef SQLITE_GROUP_CONCAT { "group_concat", 1, 0, 0, groupConcatStep, groupConcatFinalize }, { "group_concat", 2, 0, 0, groupConcatStep, groupConcatFinalize }, #endif }; int i; for(i=0; i<sizeof(aFuncs)/sizeof(aFuncs[0]); i++){ void *pArg; u8 argType = aFuncs[i].argType; if( argType==0xff ){ |