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Simplify the trigger logic for DELETE, INSERT, and UPDATE. (CVS 2157)

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FossilOrigin-Name: 8e164ab27771aced9a592ea4b7c27e9f184181a5
This commit is contained in:
drh
2004-12-07 14:06:13 +00:00
parent 81db88e630
commit dca7684141
8 changed files with 97 additions and 114 deletions
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16
src/sqliteInt.h
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@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.344 2004/11/23 01:47:30 drh Exp $
** @(#) $Id: sqliteInt.h,v 1.345 2004/12/07 14:06:13 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
@@ -1100,7 +1100,7 @@ struct Trigger {
u8 iDb; /* Database containing this trigger */
u8 iTabDb; /* Database containing Trigger.table */
u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */
u8 tr_tm; /* One of TK_BEFORE, TK_AFTER */
u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */
Expr *pWhen; /* The WHEN clause of the expresion (may be NULL) */
IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger,
the <column-list> is stored here */
@@ -1111,6 +1111,16 @@ struct Trigger {
Trigger *pNext; /* Next trigger associated with the table */
};
/*
** A trigger is either a BEFORE or an AFTER trigger. The following constants
** determine which.
**
** If there are multiple triggers, you might of some BEFORE and some AFTER.
** In that cases, the constants below can be ORed together.
*/
#define TRIGGER_BEFORE 1
#define TRIGGER_AFTER 2
/*
* An instance of struct TriggerStep is used to store a single SQL statement
* that is a part of a trigger-program.
@@ -1399,7 +1409,7 @@ void sqlite3ChangeCookie(sqlite3*, Vdbe*, int);
void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*);
void sqlite3DropTrigger(Parse*, SrcList*);
void sqlite3DropTriggerPtr(Parse*, Trigger*, int);
int sqlite3TriggersExist(Parse* , Trigger* , int , int , int, ExprList*);
int sqlite3TriggersExist(Parse*, Table*, int, ExprList*);
int sqlite3CodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int,
int, int);
void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);