'\" t
.\"     Title: SPI_fname
.\"    Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 2018
.\"    Manual: PostgreSQL 10.4 Documentation
.\"    Source: PostgreSQL 10.4
.\"  Language: English
.\"
.TH "SPI_FNAME" "3" "2018" "PostgreSQL 10.4" "PostgreSQL 10.4 Documentation"
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.SH "NAME"
SPI_fname \- determine the column name for the specified column number
.SH "SYNOPSIS"
.sp
.nf
char * SPI_fname(TupleDesc \fIrowdesc\fR, int \fIcolnumber\fR)
.fi
.SH "DESCRIPTION"
.PP
\fBSPI_fname\fR
returns a copy of the column name of the specified column\&. (You can use
\fBpfree\fR
to release the copy of the name when you don\*(Aqt need it anymore\&.)
.SH "ARGUMENTS"
.PP
TupleDesc \fIrowdesc\fR
.RS 4
input row description
.RE
.PP
int \fIcolnumber\fR
.RS 4
column number (count starts at 1)
.RE
.SH "RETURN VALUE"
.PP
The column name;
NULL
if
\fIcolnumber\fR
is out of range\&.
\fISPI_result\fR
set to
SPI_ERROR_NOATTRIBUTE
on error\&.