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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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31
src/sqliteInt.h
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@@ -2015,6 +2015,16 @@ struct AutoincInfo {
# define SQLITE_N_COLCACHE 10
#endif
typedef struct CodedTrigger CodedTrigger;
struct CodedTrigger {
SubProgram *pProgram;
Trigger *pTrigger;
u32 oldmask; /* Mask of old.* columns accessed */
u32 newmask; /* Mask of new.* columns accessed */
int orconf; /* Default ON CONFLICT policy */
CodedTrigger *pNext;
};
/*
** An SQL parser context. A copy of this structure is passed through
** the parser and down into all the parser action routine in order to
@@ -2076,6 +2086,15 @@ struct Parse {
int regRoot; /* Register holding root page number for new objects */
AutoincInfo *pAinc; /* Information about AUTOINCREMENT counters */
/* Information used while coding trigger programs. */
Parse *pRoot; /* Root Parse structure */
Table *pTriggerTab; /* Table triggers are being coded for */
u32 oldmask;
u32 newmask;
int triggerOp; /* TK_UPDATE, TK_INSERT or TK_DELETE */
int nArg;
int orconf; /* Default ON CONFLICT policy for trigger steps */
/* Above is constant between recursions. Below is reset before and after
** each recursion */
@@ -2092,7 +2111,9 @@ struct Parse {
const char *zTail; /* All SQL text past the last semicolon parsed */
Table *pNewTable; /* A table being constructed by CREATE TABLE */
Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */
#if 0
TriggerStack *trigStack; /* Trigger actions being coded */
#endif
const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */
#ifndef SQLITE_OMIT_VIRTUALTABLE
Token sArg; /* Complete text of a module argument */
@@ -2102,6 +2123,7 @@ struct Parse {
#endif
int nHeight; /* Expression tree height of current sub-select */
Table *pZombieTab; /* List of Table objects to delete after code gen */
CodedTrigger *pCodedTrigger; /* Linked list of coded triggers */
};
#ifdef SQLITE_OMIT_VIRTUALTABLE
@@ -2144,7 +2166,7 @@ struct AuthContext {
* containing the SQL statements specified as the trigger program.
*/
struct Trigger {
char *name; /* The name of the trigger */
char *zName; /* The name of the trigger */
char *table; /* The table or view to which the trigger applies */
u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */
u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */
@@ -2687,8 +2709,8 @@ void sqlite3MaterializeView(Parse*, Table*, Expr*, int);
void sqlite3DropTriggerPtr(Parse*, Trigger*);
Trigger *sqlite3TriggersExist(Parse *, Table*, int, ExprList*, int *pMask);
Trigger *sqlite3TriggerList(Parse *, Table *);
int sqlite3CodeRowTrigger(Parse*, Trigger *, int, ExprList*, int, Table *,
int, int, int, int, u32*, u32*);
void sqlite3CodeRowTrigger(Parse*, Trigger *, int, ExprList*, int, Table *,
int, int, int, int);
void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
void sqlite3DeleteTriggerStep(sqlite3*, TriggerStep*);
TriggerStep *sqlite3TriggerSelectStep(sqlite3*,Select*);
@@ -2698,12 +2720,13 @@ void sqlite3MaterializeView(Parse*, Table*, Expr*, int);
TriggerStep *sqlite3TriggerDeleteStep(sqlite3*,Token*, Expr*);
void sqlite3DeleteTrigger(sqlite3*, Trigger*);
void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*);
void sqlite3TriggerUses(Parse*,Trigger*,int,ExprList*,Table*,int,u32*,u32*);
#else
# define sqlite3TriggersExist(B,C,D,E,F) 0
# define sqlite3DeleteTrigger(A,B)
# define sqlite3DropTriggerPtr(A,B)
# define sqlite3UnlinkAndDeleteTrigger(A,B,C)
# define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I,J,K,L) 0
# define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I,J)
# define sqlite3TriggerList(X, Y) 0
#endif