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Beginning to clean up the trigger code. Still lots of work to do. (CVS 566)

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FossilOrigin-Name: b10346818b25940c6dc85e94de8e36d20954161c
This commit is contained in:
drh
2002-05-15 12:45:43 +00:00
parent 9adf9ac4e4
commit dc3794561f
6 changed files with 66 additions and 69 deletions
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71
src/sqliteInt.h
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@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.108 2002/05/15 08:30:14 danielk1977 Exp $
** @(#) $Id: sqliteInt.h,v 1.109 2002/05/15 12:45:43 drh Exp $
*/
#include "sqlite.h"
#include "hash.h"
@@ -558,63 +558,49 @@ struct Parse {
** while generating expressions. Normally false */
int schemaVerified; /* True if an OP_VerifySchema has been coded someplace
** other than after an OP_Transaction */
TriggerStack * trigStack;
TriggerStack *trigStack;
};
struct TriggerStack {
Trigger * pTrigger;
Table * pTab; /* Table that triggers are currently being coded as */
int newIdx; /* Index of "new" temp table */
int oldIdx; /* Index of "old" temp table */
int orconf; /* Current orconf policy */
struct TriggerStack * pNext;
Trigger *pTrigger;
Table *pTab; /* Table that triggers are currently being coded as */
int newIdx; /* Index of "new" temp table */
int oldIdx; /* Index of "old" temp table */
int orconf; /* Current orconf policy */
TriggerStack *pNext;
};
struct TriggerStep {
int op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */
int orconf;
Select * pSelect; /* Valid for SELECT and sometimes
Select *pSelect; /* Valid for SELECT and sometimes
INSERT steps (when pExprList == 0) */
Token target; /* Valid for DELETE, UPDATE, INSERT steps */
Expr * pWhere; /* Valid for DELETE, UPDATE steps */
ExprList * pExprList; /* Valid for UPDATE statements and sometimes
Expr *pWhere; /* Valid for DELETE, UPDATE steps */
ExprList *pExprList; /* Valid for UPDATE statements and sometimes
INSERT steps (when pSelect == 0) */
IdList *pIdList; /* Valid for INSERT statements only */
TriggerStep * pNext; /* Next in the link-list */
};
struct Trigger {
char * name; /* The name of the trigger */
char * table; /* The table or view to which the trigger applies */
int op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */
int tr_tm; /* One of TK_BEFORE, TK_AFTER, TK_INSTEAD */
Expr * pWhen; /* The WHEN clause of the expresion (may be NULL) */
IdList * pColumns; /* If this is an UPDATE OF <column-list> trigger,
the column names are stored in this list */
int foreach; /* One of TK_ROW or TK_STATEMENT */
char *name; /* The name of the trigger */
char *table; /* The table or view to which the trigger applies */
int op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */
int tr_tm; /* One of TK_BEFORE, TK_AFTER, TK_INSTEAD */
Expr *pWhen; /* The WHEN clause of the expresion (may be NULL) */
IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger,
the column names are stored in this list */
int foreach; /* One of TK_ROW or TK_STATEMENT */
TriggerStep * step_list; /* Link list of trigger program steps */
char * strings; /* pointer to the allocation of Token strings */
Trigger * pNext; /* Next trigger associated with the table */
TriggerStep *step_list; /* Link list of trigger program steps */
char *strings; /* pointer to allocation of Token strings */
Trigger *pNext; /* Next trigger associated with the table */
int isCommit;
};
TriggerStep * sqliteTriggerSelectStep(Select *);
TriggerStep * sqliteTriggerInsertStep(Token *, IdList *, ExprList *,
Select *, int);
TriggerStep * sqliteTriggerUpdateStep(Token *, ExprList *, Expr *, int);
TriggerStep * sqliteTriggerDeleteStep(Token *, Expr *);
extern int always_code_trigger_setup;
void sqliteCreateTrigger(Parse * ,Token *, int, int, IdList *, Token *, int, Expr *, TriggerStep *, char const *,int);
void sqliteDropTrigger(Parse *, Token *, int);
int sqliteTriggersExist( Parse * , Trigger * , int , int , int, ExprList * );
int sqliteCodeRowTrigger( Parse * pParse, int op, ExprList *, int tr_tm, Table * tbl, int newTable, int oldTable, int onError);
void sqliteViewTriggers(Parse *, Table *, Expr *, int, ExprList *);
/*
** Internal function prototypes
@@ -726,5 +712,14 @@ void sqliteRegisterBuildinFunctions(sqlite*);
int sqliteSafetyOn(sqlite*);
int sqliteSafetyOff(sqlite*);
int sqliteSafetyCheck(sqlite*);
void changeCookie(sqlite *);
void sqliteChangeCookie(sqlite *);
void sqliteCreateTrigger(Parse*, Token*, int, int, IdList*, Token*,
int, Expr*, TriggerStep*, char const*,int);
void sqliteDropTrigger(Parse*, Token*, int);
int sqliteTriggersExist(Parse* , Trigger* , int , int , int, ExprList*);
int sqliteCodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int, int);
void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
TriggerStep *sqliteTriggerSelectStep(Select*);
TriggerStep *sqliteTriggerInsertStep(Token*, IdList*, ExprList*, Select*, int);
TriggerStep *sqliteTriggerUpdateStep(Token*, ExprList*, Expr*, int);
TriggerStep *sqliteTriggerDeleteStep(Token*, Expr*);