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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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42
contrib/spi/moddatetime.c
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@ -8,18 +8,19 @@ a modification datetime stamp in a record when that record is UPDATEd.
Credits
This is 95%+ based on autoinc.c, which I used as a starting point as I do
not really know what I am doing. I also had help from
Jan Wieck <jwieck@debis.com> who told me about the datetime_in("now") function.
Jan Wieck <jwieck@debis.com> who told me about the timestamp_in("now") function.
OH, me, I'm Terry Mackintosh <terry@terrym.com>
*/
#include "executor/spi.h" /* this is what you need to work with SPI */
#include "commands/trigger.h" /* -"- and triggers */
HeapTuple moddatetime(void);
extern Datum moddatetime(PG_FUNCTION_ARGS);
HeapTuple
moddatetime()
Datum
moddatetime(PG_FUNCTION_ARGS)
{
TriggerData *trigdata = (TriggerData *) fcinfo->context;
Trigger *trigger; /* to get trigger name */
int nargs; /* # of arguments */
int attnum; /* positional number of field to change */
@ -30,26 +31,26 @@ moddatetime()
HeapTuple rettuple = NULL;
TupleDesc tupdesc; /* tuple description */
if (!CurrentTriggerData)
elog(ERROR, "moddatetime: triggers are not initialized.");
if (!CALLED_AS_TRIGGER(fcinfo))
elog(ERROR, "moddatetime: not fired by trigger manager.");
if (TRIGGER_FIRED_FOR_STATEMENT(CurrentTriggerData->tg_event))
if (TRIGGER_FIRED_FOR_STATEMENT(trigdata->tg_event))
elog(ERROR, "moddatetime: can't process STATEMENT events.");
if (TRIGGER_FIRED_AFTER(CurrentTriggerData->tg_event))
if (TRIGGER_FIRED_AFTER(trigdata->tg_event))
elog(ERROR, "moddatetime: must be fired before event.");
if (TRIGGER_FIRED_BY_INSERT(CurrentTriggerData->tg_event))
if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
elog(ERROR, "moddatetime: must be fired before event.");
else if (TRIGGER_FIRED_BY_UPDATE(CurrentTriggerData->tg_event))
rettuple = CurrentTriggerData->tg_newtuple;
else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
rettuple = trigdata->tg_newtuple;
else
elog(ERROR, "moddatetime: can't process DELETE events.");
rel = CurrentTriggerData->tg_relation;
rel = trigdata->tg_relation;
relname = SPI_getrelname(rel);
trigger = CurrentTriggerData->tg_trigger;
trigger = trigdata->tg_trigger;
nargs = trigger->tgnargs;
@ -60,11 +61,8 @@ moddatetime()
/* must be the field layout? */
tupdesc = rel->rd_att;
/* Why do this? */
CurrentTriggerData = NULL;
/* Get the current datetime. */
newdt = datetime_in("now");
newdt = (Datum) timestamp_in("now");
/*
* This gets the position in the turple of the field we want. args[0]
@ -82,12 +80,12 @@ moddatetime()
args[0]);
/*
* OK, this is where we make sure the datetime field that we are
* modifying is really a datetime field. Hay, error checking, what a
* OK, this is where we make sure the timestamp field that we are
* modifying is really a timestamp field. Hay, error checking, what a
* novel idea !-)
*/
if (SPI_gettypeid(tupdesc, attnum) != DATETIMEOID)
elog(ERROR, "moddatetime (%s): attribute %s must be of DATETIME type",
if (SPI_gettypeid(tupdesc, attnum) != TIMESTAMPOID)
elog(ERROR, "moddatetime (%s): attribute %s must be of TIMESTAMP type",
relname, args[0]);
/* 1 is the number of items in the arrays attnum and newdt.
@ -106,5 +104,5 @@ moddatetime()
/* Clean up */
pfree(relname);
return (rettuple);
return PointerGetDatum(rettuple);
}