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Experimental changes to improve the performance of OP_Next.

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FossilOrigin-Name: 1a249845251199c00817893add300a1a654b4df9
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dan
2011-08-27 18:48:57 +00:00
parent 3d4435b234
commit a205a486d2
6 changed files with 60 additions and 41 deletions
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2
src/vdbe.h
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@@ -61,6 +61,7 @@ struct VdbeOp {
KeyInfo *pKeyInfo; /* Used when p4type is P4_KEYINFO */
int *ai; /* Used when p4type is P4_INTARRAY */
SubProgram *pProgram; /* Used when p4type is P4_SUBPROGRAM */
int (*xAdvance)(BtCursor *, int *);
} p4;
#ifdef SQLITE_DEBUG
char *zComment; /* Comment to improve readability */
@@ -116,6 +117,7 @@ typedef struct VdbeOpList VdbeOpList;
#define P4_INT32 (-14) /* P4 is a 32-bit signed integer */
#define P4_INTARRAY (-15) /* P4 is a vector of 32-bit integers */
#define P4_SUBPROGRAM (-18) /* P4 is a pointer to a SubProgram structure */
#define P4_ADVANCE (-19) /* P4 is a pointer to BtreeNext() or BtreePrev() */
/* When adding a P4 argument using P4_KEYINFO, a copy of the KeyInfo structure
** is made. That copy is freed when the Vdbe is finalized. But if the