Hi All,
This is regarding the TODO item :
"Add SPI_gettypmod() to return a field's typemod from a TupleDesc"
The related message is:
http://archives.postgresql.org/pgsql-hackers/2005-11/msg00250.php
This basically talks about having an SPI_gettypemod() which returns the
typmod of a field of tupdesc
Please refer the attached patch based on the suggested implementation.
Regards,
Chetan
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diff --git a/src/backend/executor/spi.c b/src/backend/executor/spi.c
index 81f284c..659122e 100644
--- a/src/backend/executor/spi.c
+++ b/src/backend/executor/spi.c
@@ -955,6 +955,24 @@ SPI_gettypeid(TupleDesc tupdesc, int fnumber)
return (SystemAttributeDefinition(fnumber, true))->atttypid;
}
+int4
+SPI_gettypemod(TupleDesc tupdesc, int fnumber)
+{
+ SPI_result = 0;
+
+ if (fnumber > tupdesc->natts || fnumber == 0 ||
+ fnumber <= FirstLowInvalidHeapAttributeNumber)
+ {
+ SPI_result = SPI_ERROR_NOATTRIBUTE;
+ return -1;
+ }
+
+ if (fnumber > 0)
+ return tupdesc->attrs[fnumber - 1]->atttypmod;
+ else
+ return (SystemAttributeDefinition(fnumber, true))->atttypmod;
+}
+
char *
SPI_getrelname(Relation rel)
{
diff --git a/src/include/executor/spi.h b/src/include/executor/spi.h
index cfbaa14..a358710 100644
--- a/src/include/executor/spi.h
+++ b/src/include/executor/spi.h
@@ -113,6 +113,7 @@ extern char *SPI_getvalue(HeapTuple tuple, TupleDesc tupdesc, int fnumber);
extern Datum SPI_getbinval(HeapTuple tuple, TupleDesc tupdesc, int fnumber, bool *isnull);
extern char *SPI_gettype(TupleDesc tupdesc, int fnumber);
extern Oid SPI_gettypeid(TupleDesc tupdesc, int fnumber);
+extern int4 SPI_gettypemod(TupleDesc tupdesc, int fnumber);
extern char *SPI_getrelname(Relation rel);
extern char *SPI_getnspname(Relation rel);
extern void *SPI_palloc(Size size);
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