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'\" t
.\" Title: SPI_getvalue
.\" Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\" Date: 2021
.\" Manual: PostgreSQL 13.4 Documentation
.\" Source: PostgreSQL 13.4
.\" Language: English
.\"
.TH "SPI_GETVALUE" "3" "2021" "PostgreSQL 13.4" "PostgreSQL 13.4 Documentation"
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.SH "NAME"
SPI_getvalue \- return the string value of the specified column
.SH "SYNOPSIS"
.sp
.nf
char * SPI_getvalue(HeapTuple \fIrow\fR, TupleDesc \fIrowdesc\fR, int \fIcolnumber\fR)
.fi
.SH "DESCRIPTION"
.PP
\fBSPI_getvalue\fR
returns the string representation of the value of the specified column\&.
.PP
The result is returned in memory allocated using
\fBpalloc\fR\&. (You can use
\fBpfree\fR
to release the memory when you don\*(Aqt need it anymore\&.)
.SH "ARGUMENTS"
.PP
HeapTuple \fIrow\fR
.RS 4
input row to be examined
.RE
.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
Column value, or
NULL
if the column is null,
\fIcolnumber\fR
is out of range (\fISPI_result\fR
is set to
SPI_ERROR_NOATTRIBUTE), or no output function is available (\fISPI_result\fR
is set to
SPI_ERROR_NOOUTFUNC)\&.
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