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Current File : /opt/alt/postgresql11/usr/share/man/man3/SPI_modifytuple.3
'\" t
.\"     Title: SPI_modifytuple
.\"    Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: 2017-11-06
.\"    Manual: PostgreSQL 9.2.24 Documentation
.\"    Source: PostgreSQL 9.2.24
.\"  Language: English
.\"
.TH "SPI_MODIFYTUPLE" "3" "2017-11-06" "PostgreSQL 9.2.24" "PostgreSQL 9.2.24 Documentation"
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.\" * MAIN CONTENT STARTS HERE *
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.SH "NAME"
SPI_modifytuple \- create a row by replacing selected fields of a given row
.\" SPI_modifytuple
.SH "SYNOPSIS"
.sp
.nf
HeapTuple SPI_modifytuple(Relation \fIrel\fR, HeapTuple \fIrow\fR, int \fIncols\fR,
                          int * \fIcolnum\fR, Datum * \fIvalues\fR, const char * \fInulls\fR)
.fi
.SH "DESCRIPTION"
.PP
\fBSPI_modifytuple\fR
creates a new row by substituting new values for selected columns, copying the original row\*(Aqs columns at other positions\&. The input row is not modified\&.
.SH "ARGUMENTS"
.PP
Relation \fIrel\fR
.RS 4
Used only as the source of the row descriptor for the row\&. (Passing a relation rather than a row descriptor is a misfeature\&.)
.RE
.PP
HeapTuple \fIrow\fR
.RS 4
row to be modified
.RE
.PP
int \fIncols\fR
.RS 4
number of column numbers in the array
\fIcolnum\fR
.RE
.PP
int * \fIcolnum\fR
.RS 4
array of the numbers of the columns that are to be changed (column numbers start at 1)
.RE
.PP
Datum * \fIvalues\fR
.RS 4
new values for the specified columns
.RE
.PP
const char * \fINulls\fR
.RS 4
which new values are null, if any (see
\fBSPI_execute_plan\fR
for the format)
.RE
.SH "RETURN VALUE"
.PP
new row with modifications, allocated in the upper executor context;
NULL
only if
\fIrow\fR
is
NULL
.PP
On error,
\fISPI_result\fR
is set as follows:
.PP
SPI_ERROR_ARGUMENT
.RS 4
if
\fIrel\fR
is
NULL, or if
\fIrow\fR
is
NULL, or if
\fIncols\fR
is less than or equal to 0, or if
\fIcolnum\fR
is
NULL, or if
\fIvalues\fR
is
NULL\&.
.RE
.PP
SPI_ERROR_NOATTRIBUTE
.RS 4
if
\fIcolnum\fR
contains an invalid column number (less than or equal to 0 or greater than the number of column in
\fIrow\fR)
.RE

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