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Changes to support recursive triggers.

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FossilOrigin-Name: 9b9c19211593d5ff7b39254a29c284560a8bcedb
This commit is contained in:
dan
2009-08-28 18:53:45 +00:00
parent e408edac16
commit 165921a742
25 changed files with 889 additions and 581 deletions
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24
src/vdbe.h
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@@ -34,6 +34,7 @@ typedef struct Vdbe Vdbe;
*/
typedef struct VdbeFunc VdbeFunc;
typedef struct Mem Mem;
typedef struct SubProgram SubProgram;
/*
** A single instruction of the virtual machine has an opcode
@@ -48,7 +49,7 @@ struct VdbeOp {
int p1; /* First operand */
int p2; /* Second parameter (often the jump destination) */
int p3; /* The third parameter */
union { /* forth parameter */
union { /* fourth parameter */
int i; /* Integer value if p4type==P4_INT32 */
void *p; /* Generic pointer */
char *z; /* Pointer to data for string (char array) types */
@@ -61,6 +62,7 @@ struct VdbeOp {
VTable *pVtab; /* Used when p4type is P4_VTAB */
KeyInfo *pKeyInfo; /* Used when p4type is P4_KEYINFO */
int *ai; /* Used when p4type is P4_INTARRAY */
SubProgram *pProgram; /* Used when p4type is P4_SUBPROGRAM */
} p4;
#ifdef SQLITE_DEBUG
char *zComment; /* Comment to improve readability */
@@ -72,6 +74,19 @@ struct VdbeOp {
};
typedef struct VdbeOp VdbeOp;
/*
** A sub-routine used to implement a trigger program.
*/
struct SubProgram {
VdbeOp *aOp; /* Array of opcodes for sub-program */
int nOp; /* Elements in aOp[] */
int nMem; /* Number of memory cells required */
int nCsr; /* Number of cursors required */
int nRef; /* Number of pointers to this structure */
void *token; /* id that may be used to recursive triggers */
};
/*
** A smaller version of VdbeOp used for the VdbeAddOpList() function because
** it takes up less space.
@@ -85,7 +100,7 @@ struct VdbeOpList {
typedef struct VdbeOpList VdbeOpList;
/*
** Allowed values of VdbeOp.p3type
** Allowed values of VdbeOp.p4type
*/
#define P4_NOTUSED 0 /* The P4 parameter is not used */
#define P4_DYNAMIC (-1) /* Pointer to a string obtained from sqliteMalloc() */
@@ -102,6 +117,7 @@ typedef struct VdbeOpList VdbeOpList;
#define P4_INT64 (-13) /* P4 is a 64-bit signed integer */
#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 */
/* 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
@@ -168,7 +184,7 @@ void sqlite3VdbeUsesBtree(Vdbe*, int);
VdbeOp *sqlite3VdbeGetOp(Vdbe*, int);
int sqlite3VdbeMakeLabel(Vdbe*);
void sqlite3VdbeDelete(Vdbe*);
void sqlite3VdbeMakeReady(Vdbe*,int,int,int,int);
void sqlite3VdbeMakeReady(Vdbe*,int,int,int,int,int);
int sqlite3VdbeFinalize(Vdbe*);
void sqlite3VdbeResolveLabel(Vdbe*, int);
int sqlite3VdbeCurrentAddr(Vdbe*);
@@ -183,6 +199,8 @@ void sqlite3VdbeCountChanges(Vdbe*);
sqlite3 *sqlite3VdbeDb(Vdbe*);
void sqlite3VdbeSetSql(Vdbe*, const char *z, int n, int);
void sqlite3VdbeSwap(Vdbe*,Vdbe*);
VdbeOp *sqlite3VdbeTakeOpArray(Vdbe*, int*, int*);
void sqlite3VdbeProgramDelete(sqlite3 *, SubProgram *, int);
#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
int sqlite3VdbeReleaseMemory(int);