Return the data type oid of the specified column
Oid SPI_gettypeid(TupleDesc rowdesc, int colnumber)
SPI_gettypeid returns the OID of the data type of the specified column.
TupleDesc rowdesc
input row description
int colnumber
column number (count starts at 1)
The OID of the data type of the specified column or InvalidOid on error. On error, SPI_result is set to SPI_ERROR_NOATTRIBUTE.