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Add support for IF EXISTS on CREATE/DROP TRIGGER/VIEW. Ticket #1899. (CVS 3406)

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FossilOrigin-Name: e4fe736cfbbdc081581911a01690576034877b72
This commit is contained in:
drh
2006-09-11 23:45:48 +00:00
parent 4240240f12
commit fdd48a76a6
10 changed files with 91 additions and 67 deletions
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13
src/trigger.c
View File

@@ -49,7 +49,8 @@ void sqlite3BeginTrigger(
SrcList *pTableName,/* The name of the table/view the trigger applies to */
int foreach, /* One of TK_ROW or TK_STATEMENT */
Expr *pWhen, /* WHEN clause */
int isTemp /* True if the TEMPORARY keyword is present */
int isTemp, /* True if the TEMPORARY keyword is present */
int noErr /* Suppress errors if the trigger already exists */
){
Trigger *pTrigger = 0;
Table *pTab;
@@ -115,7 +116,9 @@ void sqlite3BeginTrigger(
goto trigger_cleanup;
}
if( sqlite3HashFind(&(db->aDb[iDb].pSchema->trigHash), zName,strlen(zName)) ){
sqlite3ErrorMsg(pParse, "trigger %T already exists", pName);
if( !noErr ){
sqlite3ErrorMsg(pParse, "trigger %T already exists", pName);
}
goto trigger_cleanup;
}
@@ -439,7 +442,7 @@ void sqlite3DeleteTrigger(Trigger *pTrigger){
** same job as this routine except it takes a pointer to the trigger
** instead of the trigger name.
**/
void sqlite3DropTrigger(Parse *pParse, SrcList *pName){
void sqlite3DropTrigger(Parse *pParse, SrcList *pName, int noErr){
Trigger *pTrigger = 0;
int i;
const char *zDb;
@@ -463,7 +466,9 @@ void sqlite3DropTrigger(Parse *pParse, SrcList *pName){
if( pTrigger ) break;
}
if( !pTrigger ){
sqlite3ErrorMsg(pParse, "no such trigger: %S", pName, 0);
if( !noErr ){
sqlite3ErrorMsg(pParse, "no such trigger: %S", pName, 0);
}
goto drop_trigger_cleanup;
}
sqlite3DropTriggerPtr(pParse, pTrigger);