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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >SPI_push</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REV="MADE" HREF="mailto:pgsql-docs@postgresql.org"><LINK REL="HOME" TITLE="PostgreSQL 9.2.24 Documentation" HREF="index.html"><LINK REL="UP" TITLE="Interface Functions" HREF="spi-interface.html"><LINK REL="PREVIOUS" TITLE="SPI_finish" HREF="spi-spi-finish.html"><LINK REL="NEXT" TITLE="SPI_pop" HREF="spi-spi-pop.html"><LINK REL="STYLESHEET" TYPE="text/css" HREF="stylesheet.css"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"><META NAME="creation" CONTENT="2017-11-06T22:43:11"></HEAD ><BODY CLASS="REFENTRY" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="5" ALIGN="center" VALIGN="bottom" ><A HREF="index.html" >PostgreSQL 9.2.24 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="SPI_finish" HREF="spi-spi-finish.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="spi-interface.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="SPI_pop" HREF="spi-spi-pop.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SPI-SPI-PUSH" ></A >SPI_push</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN60071" ></A ><H2 >Name</H2 >SPI_push -- push SPI stack to allow recursive SPI usage</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN60076" ></A ><H2 >Synopsis</H2 ><PRE CLASS="SYNOPSIS" >void SPI_push(void)</PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN60078" ></A ><H2 >Description</H2 ><P > <CODE CLASS="FUNCTION" >SPI_push</CODE > should be called before executing another procedure that might itself wish to use SPI. After <CODE CLASS="FUNCTION" >SPI_push</CODE >, SPI is no longer in a <SPAN CLASS="QUOTE" >"connected"</SPAN > state, and SPI function calls will be rejected unless a fresh <CODE CLASS="FUNCTION" >SPI_connect</CODE > is done. This ensures a clean separation between your procedure's SPI state and that of another procedure you call. After the other procedure returns, call <CODE CLASS="FUNCTION" >SPI_pop</CODE > to restore access to your own SPI state. </P ><P > Note that <CODE CLASS="FUNCTION" >SPI_execute</CODE > and related functions automatically do the equivalent of <CODE CLASS="FUNCTION" >SPI_push</CODE > before passing control back to the SQL execution engine, so it is not necessary for you to worry about this when using those functions. Only when you are directly calling arbitrary code that might contain <CODE CLASS="FUNCTION" >SPI_connect</CODE > calls do you need to issue <CODE CLASS="FUNCTION" >SPI_push</CODE > and <CODE CLASS="FUNCTION" >SPI_pop</CODE >. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="spi-spi-finish.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="spi-spi-pop.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SPI_finish</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="spi-interface.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SPI_pop</TD ></TR ></TABLE ></DIV ></BODY ></HTML >