'\" t
.\"     Title: SPI_register_relation
.\"    Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 2026
.\"    Manual: PostgreSQL 15.18 Documentation
.\"    Source: PostgreSQL 15.18
.\"  Language: English
.\"
.TH "SPI_REGISTER_RELATION" "3" "2026" "PostgreSQL 15.18" "PostgreSQL 15.18 Documentation"
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.SH "NAME"
SPI_register_relation \- make an ephemeral named relation available by name in SPI queries
.SH "SYNOPSIS"
.sp
.nf
int SPI_register_relation(EphemeralNamedRelation \fIenr\fR)
.fi
.SH "DESCRIPTION"
.PP
\fBSPI_register_relation\fR
makes an ephemeral named relation, with associated information, available to queries planned and executed through the current SPI connection\&.
.SH "ARGUMENTS"
.PP
EphemeralNamedRelation \fIenr\fR
.RS 4
the ephemeral named relation registry entry
.RE
.SH "RETURN VALUE"
.PP
If the execution of the command was successful then the following (nonnegative) value will be returned:
.PP
SPI_OK_REL_REGISTER
.RS 4
if the relation has been successfully registered by name
.RE
.PP
On error, one of the following negative values is returned:
.PP
SPI_ERROR_ARGUMENT
.RS 4
if
\fIenr\fR
is
NULL
or its
\fIname\fR
field is
NULL
.RE
.PP
SPI_ERROR_UNCONNECTED
.RS 4
if called from an unconnected C function
.RE
.PP
SPI_ERROR_REL_DUPLICATE
.RS 4
if the name specified in the
\fIname\fR
field of
\fIenr\fR
is already registered for this connection
.RE