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Overview
Comment: | Update sqlite3MemCompare() to try common cases first, for a modest speed improvement. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
b25bac79191975149d88fe34618c7435 |
User & Date: | drh 2013-08-21 19:13:53.653 |
Context
2013-08-21
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19:59 | Fix typo in test. (check-in: f9859fe93b user: mistachkin tags: trunk) | |
19:13 | Update sqlite3MemCompare() to try common cases first, for a modest speed improvement. (check-in: b25bac7919 user: drh tags: trunk) | |
17:35 | If a virtual table xSync() returns an error message, copy it into a buffer allocated by sqlite3DbMalloc() before transfering it to Vdbe.zErrMsg. (check-in: 854ba30490 user: dan tags: trunk) | |
Changes
Changes to src/vdbemem.c.
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795 796 797 798 799 800 801 | } /* If one value is a number and the other is not, the number is less. ** If both are numbers, compare as reals if one is a real, or as integers ** if both values are integers. */ if( combined_flags&(MEM_Int|MEM_Real) ){ | > | | < | | < < | > > | | | | | > > | | < > | | | | < < < < < < < | 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 | } /* If one value is a number and the other is not, the number is less. ** If both are numbers, compare as reals if one is a real, or as integers ** if both values are integers. */ if( combined_flags&(MEM_Int|MEM_Real) ){ double r1, r2; if( (f1 & f2 & MEM_Int)!=0 ){ if( pMem1->u.i < pMem2->u.i ) return -1; if( pMem1->u.i > pMem2->u.i ) return 1; return 0; } if( (f1&MEM_Real)!=0 ){ r1 = pMem1->r; }else if( (f1&MEM_Int)!=0 ){ r1 = (double)pMem1->u.i; }else{ return 1; } if( (f2&MEM_Real)!=0 ){ r2 = pMem2->r; }else if( (f2&MEM_Int)!=0 ){ r2 = (double)pMem2->u.i; }else{ return -1; } if( r1<r2 ) return -1; if( r1>r2 ) return 1; return 0; } /* If one value is a string and the other is a blob, the string is less. ** If both are strings, compare using the collating functions. */ if( combined_flags&MEM_Str ){ if( (f1 & MEM_Str)==0 ){ |
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