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diff --git a/doc/src/sgml/man3/SPI_freeplan.3 b/doc/src/sgml/man3/SPI_freeplan.3
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+'\" t
+.\"     Title: SPI_freeplan
+.\"    Author: The PostgreSQL Global Development Group
+.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
+.\"      Date: 2023
+.\"    Manual: PostgreSQL 15.5 Documentation
+.\"    Source: PostgreSQL 15.5
+.\"  Language: English
+.\"
+.TH "SPI_FREEPLAN" "3" "2023" "PostgreSQL 15.5" "PostgreSQL 15.5 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_freeplan \- free a previously saved prepared statement
+.SH "SYNOPSIS"
+.sp
+.nf
+int SPI_freeplan(SPIPlanPtr \fIplan\fR)
+.fi
+.SH "DESCRIPTION"
+.PP
+\fBSPI_freeplan\fR
+releases a prepared statement previously returned by
+\fBSPI_prepare\fR
+or saved by
+\fBSPI_keepplan\fR
+or
+\fBSPI_saveplan\fR\&.
+.SH "ARGUMENTS"
+.PP
+SPIPlanPtr \fIplan\fR
+.RS 4
+pointer to statement to free
+.RE
+.SH "RETURN VALUE"
+.PP
+0 on success;
+SPI_ERROR_ARGUMENT
+if
+\fIplan\fR
+is
+NULL
+or invalid