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Overview
| Comment: | Add operands p4 and p5 to the VdbeOp structure. (CVS 4659) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
ad528735e41ce2ec2e680b12e562d4dd |
| User & Date: | drh 2008-01-02 17:25:55 |
Context
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2008-01-03
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| 00:01 | Refactoring the VM. The P3 parameter is changed to P4. A P5 parameter is added (though not currently used.) Add routines sqlite3VdbeAddOpX() where X is one of 0, 1, 2, 3, or 4. (CVS 4660) check-in: 027875e4 user: drh tags: trunk | |
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2008-01-02
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| 17:25 | Add operands p4 and p5 to the VdbeOp structure. (CVS 4659) check-in: ad528735 user: drh tags: trunk | |
| 17:11 | Minor optimizations for sub-selects in EXISTS(...) expressions: Discard any DISTINCT or ORDER BY clauses and do not calculate any column values. (CVS 4658) check-in: fbd17a89 user: danielk1977 tags: trunk | |
Changes
Changes to src/vdbe.h.
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************************************************************************* ** Header file for the Virtual DataBase Engine (VDBE) ** ** This header defines the interface to the virtual database engine ** or VDBE. The VDBE implements an abstract machine that runs a ** simple program to access and modify the underlying database. ** ** $Id: vdbe.h,v 1.116 2008/01/02 00:34:37 drh Exp $ */ #ifndef _SQLITE_VDBE_H_ #define _SQLITE_VDBE_H_ #include <stdio.h> /* ** A single VDBE is an opaque structure named "Vdbe". Only routines ................................................................................ ** A single instruction of the virtual machine has an opcode ** and as many as three operands. The instruction is recorded ** as an instance of the following structure: */ struct VdbeOp { u8 opcode; /* What operation to perform */ char p3type; /* One of the P3_xxx constants defined below */ int p1; /* First operand */ int p2; /* Second parameter (often the jump destination) */ union { /* Third parameter */ int i; /* Integer value if p3type==P3_INT32 */ char *p; /* A pointer for all other value sof p3type */ } p3; #ifdef SQLITE_DEBUG char *zComment; /* Comment to improve readability */ #endif #ifdef VDBE_PROFILE int cnt; /* Number of times this instruction was executed */ long long cycles; /* Total time spend executing this instruction */ #endif |
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************************************************************************* ** Header file for the Virtual DataBase Engine (VDBE) ** ** This header defines the interface to the virtual database engine ** or VDBE. The VDBE implements an abstract machine that runs a ** simple program to access and modify the underlying database. ** ** $Id: vdbe.h,v 1.117 2008/01/02 17:25:55 drh Exp $ */ #ifndef _SQLITE_VDBE_H_ #define _SQLITE_VDBE_H_ #include <stdio.h> /* ** A single VDBE is an opaque structure named "Vdbe". Only routines ................................................................................ ** A single instruction of the virtual machine has an opcode ** and as many as three operands. The instruction is recorded ** as an instance of the following structure: */ struct VdbeOp { u8 opcode; /* What operation to perform */ char p3type; /* One of the P3_xxx constants defined below */ char p4type; /* One of the P3_xxx constants for p4 */ u8 p5; /* Fifth parameter is an unsigned character */ int p1; /* First operand */ int p2; /* Second parameter (often the jump destination) */ union { /* Third and forth parameters */ int i; /* Integer value if p3type==P3_INT32 */ char *p; /* A pointer for all other value sof p3type */ } p3, p4; #ifdef SQLITE_DEBUG char *zComment; /* Comment to improve readability */ #endif #ifdef VDBE_PROFILE int cnt; /* Number of times this instruction was executed */ long long cycles; /* Total time spend executing this instruction */ #endif |