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Overview
| Comment: | Remove the P3 operand from OP_IsNull since it was not being used. (CVS 6779) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
767ef1e4a1b31abef479368d9f960ecf |
| User & Date: | drh 2009-06-18 00:41:56 |
Context
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2009-06-18
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| 11:29 | Reduce the minimum usable page space to 480 byte from 500 bytes. (CVS 6780) (check-in: db4fb835 user: drh tags: trunk) | |
| 00:41 | Remove the P3 operand from OP_IsNull since it was not being used. (CVS 6779) (check-in: 767ef1e4 user: drh tags: trunk) | |
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2009-06-17
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| 22:50 | Avoid an assertion fault if an out-of-memory error occurs while trying to run the string-concatentation operator on a zero-blob. (This is an absurd thing to do, but even so, we still should not fault.) (CVS 6778) (check-in: 0def0b76 user: drh tags: trunk) | |
Changes
Changes to src/vdbe.c.
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** ** Various scripts scan this source file in order to generate HTML ** documentation, headers files, or other derived files. The formatting ** of the code in this file is, therefore, important. See other comments ** in this file for details. If in doubt, do not deviate from existing ** commenting and indentation practices when changing or adding code. ** ** $Id: vdbe.c,v 1.854 2009/06/17 22:50:42 drh Exp $ */ #include "sqliteInt.h" #include "vdbeInt.h" /* ** The following global variable is incremented every time a cursor ** moves, either by the OP_SeekXX, OP_Next, or OP_Prev opcodes. The test ................................................................................ } if( c ){ pc = pOp->p2-1; } break; } /* Opcode: IsNull P1 P2 P3 * * ** ** Jump to P2 if the value in register P1 is NULL. If P3 is greater ** than zero, then check all values reg(P1), reg(P1+1), ** reg(P1+2), ..., reg(P1+P3-1). */ case OP_IsNull: { /* same as TK_ISNULL, jump, in1 */ int n; n = pOp->p3; assert( pOp->p3==0 || pOp->p1>0 ); do{ if( (pIn1->flags & MEM_Null)!=0 ){ pc = pOp->p2 - 1; break; } pIn1++; }while( --n > 0 ); break; } /* Opcode: NotNull P1 P2 * * * ** ** Jump to P2 if the value in register P1 is not NULL. */ |
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** ** Various scripts scan this source file in order to generate HTML ** documentation, headers files, or other derived files. The formatting ** of the code in this file is, therefore, important. See other comments ** in this file for details. If in doubt, do not deviate from existing ** commenting and indentation practices when changing or adding code. ** ** $Id: vdbe.c,v 1.855 2009/06/18 00:41:56 drh Exp $ */ #include "sqliteInt.h" #include "vdbeInt.h" /* ** The following global variable is incremented every time a cursor ** moves, either by the OP_SeekXX, OP_Next, or OP_Prev opcodes. The test ................................................................................ } if( c ){ pc = pOp->p2-1; } break; } /* Opcode: IsNull P1 P2 * * * ** ** Jump to P2 if the value in register P1 is NULL. */ case OP_IsNull: { /* same as TK_ISNULL, jump, in1 */ if( (pIn1->flags & MEM_Null)!=0 ){ pc = pOp->p2 - 1; } break; } /* Opcode: NotNull P1 P2 * * * ** ** Jump to P2 if the value in register P1 is not NULL. */ |