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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: 2018 .\" Manual: PostgreSQL 9.6.9 Documentation .\" Source: PostgreSQL 9.6.9 .\" Language: English .\" .TH "SPI_GETVALUE" "3" "2018" "PostgreSQL 9.6.9" "PostgreSQL 9.6.9 Documentation" .\" ----------------------------------------------------------------- .\" * Define some portability stuff .\" ----------------------------------------------------------------- .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .\" http://bugs.debian.org/507673 .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" ----------------------------------------------------------------- .\" * set default formatting .\" ----------------------------------------------------------------- .\" disable hyphenation .nh .\" disable justification (adjust text to left margin only) .ad l .\" ----------------------------------------------------------------- .\" * MAIN CONTENT STARTS HERE * .\" ----------------------------------------------------------------- .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)\&.