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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 >dblink_exec</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="dblink" HREF="dblink.html"><LINK REL="PREVIOUS" TITLE="dblink" HREF="contrib-dblink-function.html"><LINK REL="NEXT" TITLE="dblink_open" HREF="contrib-dblink-open.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="dblink" HREF="contrib-dblink-function.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="dblink.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="dblink_open" HREF="contrib-dblink-open.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="CONTRIB-DBLINK-EXEC" ></A >dblink_exec</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN147314" ></A ><H2 >Name</H2 >dblink_exec -- executes a command in a remote database</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN147317" ></A ><H2 >Synopsis</H2 ><PRE CLASS="SYNOPSIS" >dblink_exec(text connname, text sql [, bool fail_on_error]) returns text dblink_exec(text connstr, text sql [, bool fail_on_error]) returns text dblink_exec(text sql [, bool fail_on_error]) returns text</PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN147319" ></A ><H2 >Description</H2 ><P > <CODE CLASS="FUNCTION" >dblink_exec</CODE > executes a command (that is, any SQL statement that doesn't return rows) in a remote database. </P ><P > When two <TT CLASS="TYPE" >text</TT > arguments are given, the first one is first looked up as a persistent connection's name; if found, the command is executed on that connection. If not found, the first argument is treated as a connection info string as for <CODE CLASS="FUNCTION" >dblink_connect</CODE >, and the indicated connection is made just for the duration of this command. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN147326" ></A ><H2 >Arguments</H2 ><P ></P ><DIV CLASS="VARIABLELIST" ><DL ><DT ><TT CLASS="PARAMETER" >connname</TT ></DT ><DD ><P > Name of the connection to use; omit this parameter to use the unnamed connection. </P ></DD ><DT ><TT CLASS="PARAMETER" >connstr</TT ></DT ><DD ><P > A connection info string, as previously described for <CODE CLASS="FUNCTION" >dblink_connect</CODE >. </P ></DD ><DT ><TT CLASS="PARAMETER" >sql</TT ></DT ><DD ><P > The SQL command that you wish to execute in the remote database, for example <TT CLASS="LITERAL" >insert into foo values(0,'a','{"a0","b0","c0"}')</TT >. </P ></DD ><DT ><TT CLASS="PARAMETER" >fail_on_error</TT ></DT ><DD ><P > If true (the default when omitted) then an error thrown on the remote side of the connection causes an error to also be thrown locally. If false, the remote error is locally reported as a NOTICE, and the function's return value is set to <TT CLASS="LITERAL" >ERROR</TT >. </P ></DD ></DL ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN147352" ></A ><H2 >Return Value</H2 ><P > Returns status, either the command's status string or <TT CLASS="LITERAL" >ERROR</TT >. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN147356" ></A ><H2 >Examples</H2 ><PRE CLASS="SCREEN" >SELECT dblink_connect('dbname=dblink_test_standby'); dblink_connect ---------------- OK (1 row) SELECT dblink_exec('insert into foo values(21,''z'',''{"a0","b0","c0"}'');'); dblink_exec ----------------- INSERT 943366 1 (1 row) SELECT dblink_connect('myconn', 'dbname=regression'); dblink_connect ---------------- OK (1 row) SELECT dblink_exec('myconn', 'insert into foo values(21,''z'',''{"a0","b0","c0"}'');'); dblink_exec ------------------ INSERT 6432584 1 (1 row) SELECT dblink_exec('myconn', 'insert into pg_class values (''foo'')',false); NOTICE: sql error DETAIL: ERROR: null value in column "relnamespace" violates not-null constraint dblink_exec ------------- ERROR (1 row)</PRE ></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="contrib-dblink-function.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="contrib-dblink-open.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >dblink</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="dblink.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >dblink_open</TD ></TR ></TABLE ></DIV ></BODY ></HTML >