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Second round of fmgr changes: triggers are now invoked in new style,

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CurrentTriggerData is history.
This commit is contained in:
Tom Lane
2000-05-29 01:59:17 +00:00
parent 147ccf5c80
commit 18952f6744
41 changed files with 666 additions and 674 deletions
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84
contrib/spi/refint.c
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@ -8,10 +8,8 @@
#include <ctype.h> /* tolower () */
HeapTuple check_primary_key(void);
HeapTuple check_foreign_key(void);
extern Datum check_primary_key(PG_FUNCTION_ARGS);
extern Datum check_foreign_key(PG_FUNCTION_ARGS);
typedef struct
@ -38,9 +36,10 @@ static EPlan *find_plan(char *ident, EPlan ** eplan, int *nplans);
* check_primary_key ('Fkey1', 'Fkey2', 'Ptable', 'Pkey1', 'Pkey2').
*/
HeapTuple /* have to return HeapTuple to Executor */
check_primary_key()
Datum
check_primary_key(PG_FUNCTION_ARGS)
{
TriggerData *trigdata = (TriggerData *) fcinfo->context;
Trigger *trigger; /* to get trigger name */
int nargs; /* # of args specified in CREATE TRIGGER */
char **args; /* arguments: column names and table name */
@ -57,33 +56,35 @@ check_primary_key()
int ret;
int i;
/*
* Some checks first...
*/
#ifdef DEBUG_QUERY
elog(NOTICE, "Check_primary_key Enter Function");
#endif
/*
* Some checks first...
*/
/* Called by trigger manager ? */
if (!CurrentTriggerData)
elog(ERROR, "check_primary_key: triggers are not initialized");
if (!CALLED_AS_TRIGGER(fcinfo))
elog(ERROR, "check_primary_key: not fired by trigger manager");
/* Should be called for ROW trigger */
if (TRIGGER_FIRED_FOR_STATEMENT(CurrentTriggerData->tg_event))
if (TRIGGER_FIRED_FOR_STATEMENT(trigdata->tg_event))
elog(ERROR, "check_primary_key: can't process STATEMENT events");
/* If INSERTion then must check Tuple to being inserted */
if (TRIGGER_FIRED_BY_INSERT(CurrentTriggerData->tg_event))
tuple = CurrentTriggerData->tg_trigtuple;
if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
tuple = trigdata->tg_trigtuple;
/* Not should be called for DELETE */
else if (TRIGGER_FIRED_BY_DELETE(CurrentTriggerData->tg_event))
else if (TRIGGER_FIRED_BY_DELETE(trigdata->tg_event))
elog(ERROR, "check_primary_key: can't process DELETE events");
/* If UPDATion the must check new Tuple, not old one */
else
tuple = CurrentTriggerData->tg_newtuple;
tuple = trigdata->tg_newtuple;
trigger = CurrentTriggerData->tg_trigger;
trigger = trigdata->tg_trigger;
nargs = trigger->tgnargs;
args = trigger->tgargs;
@ -92,16 +93,9 @@ check_primary_key()
nkeys = nargs / 2;
relname = args[nkeys];
rel = CurrentTriggerData->tg_relation;
rel = trigdata->tg_relation;
tupdesc = rel->rd_att;
/*
* Setting CurrentTriggerData to NULL prevents direct calls to trigger
* functions in queries. Normally, trigger functions have to be called
* by trigger manager code only.
*/
CurrentTriggerData = NULL;
/* Connect to SPI manager */
if ((ret = SPI_connect()) < 0)
elog(ERROR, "check_primary_key: SPI_connect returned %d", ret);
@ -145,7 +139,7 @@ check_primary_key()
if (isnull)
{
SPI_finish();
return (tuple);
return PointerGetDatum(tuple);
}
if (plan->nplans <= 0) /* Get typeId of column */
@ -207,7 +201,7 @@ check_primary_key()
SPI_finish();
return (tuple);
return PointerGetDatum(tuple);
}
/*
@ -222,9 +216,10 @@ check_primary_key()
* 'Ftable1', 'Fkey11', 'Fkey12', 'Ftable2', 'Fkey21', 'Fkey22').
*/
HeapTuple /* have to return HeapTuple to Executor */
check_foreign_key()
Datum
check_foreign_key(PG_FUNCTION_ARGS)
{
TriggerData *trigdata = (TriggerData *) fcinfo->context;
Trigger *trigger; /* to get trigger name */
int nargs; /* # of args specified in CREATE TRIGGER */
char **args; /* arguments: as described above */
@ -258,19 +253,19 @@ check_foreign_key()
*/
/* Called by trigger manager ? */
if (!CurrentTriggerData)
elog(ERROR, "check_foreign_key: triggers are not initialized");
if (!CALLED_AS_TRIGGER(fcinfo))
elog(ERROR, "check_foreign_key: not fired by trigger manager");
/* Should be called for ROW trigger */
if (TRIGGER_FIRED_FOR_STATEMENT(CurrentTriggerData->tg_event))
if (TRIGGER_FIRED_FOR_STATEMENT(trigdata->tg_event))
elog(ERROR, "check_foreign_key: can't process STATEMENT events");
/* Not should be called for INSERT */
if (TRIGGER_FIRED_BY_INSERT(CurrentTriggerData->tg_event))
if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
elog(ERROR, "check_foreign_key: can't process INSERT events");
/* Have to check tg_trigtuple - tuple being deleted */
trigtuple = CurrentTriggerData->tg_trigtuple;
trigtuple = trigdata->tg_trigtuple;
/*
* But if this is UPDATE then we have to return tg_newtuple. Also, if
@ -278,12 +273,12 @@ check_foreign_key()
* do.
*/
is_update = 0;
if (TRIGGER_FIRED_BY_UPDATE(CurrentTriggerData->tg_event))
if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
{
newtuple = CurrentTriggerData->tg_newtuple;
newtuple = trigdata->tg_newtuple;
is_update = 1;
}
trigger = CurrentTriggerData->tg_trigger;
trigger = trigdata->tg_trigger;
nargs = trigger->tgnargs;
args = trigger->tgargs;
@ -304,16 +299,9 @@ check_foreign_key()
elog(ERROR, "check_foreign_key: invalid number of arguments %d for %d references",
nargs + 2, nrefs);
rel = CurrentTriggerData->tg_relation;
rel = trigdata->tg_relation;
tupdesc = rel->rd_att;
/*
* Setting CurrentTriggerData to NULL prevents direct calls to trigger
* functions in queries. Normally, trigger functions have to be called
* by trigger manager code only.
*/
CurrentTriggerData = NULL;
/* Connect to SPI manager */
if ((ret = SPI_connect()) < 0)
elog(ERROR, "check_foreign_key: SPI_connect returned %d", ret);
@ -364,7 +352,7 @@ check_foreign_key()
if (isnull)
{
SPI_finish();
return ((newtuple == NULL) ? trigtuple : newtuple);
return PointerGetDatum((newtuple == NULL) ? trigtuple : newtuple);
}
/*
@ -527,7 +515,7 @@ check_foreign_key()
if (newtuple != NULL && isequal)
{
SPI_finish();
return (newtuple);
return PointerGetDatum(newtuple);
}
/*
@ -571,7 +559,7 @@ check_foreign_key()
SPI_finish();
return ((newtuple == NULL) ? trigtuple : newtuple);
return PointerGetDatum((newtuple == NULL) ? trigtuple : newtuple);
}
static EPlan *