<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >ECPG - Embedded SQL in C</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 8.3.1 Documentation" HREF="index.html"><LINK REL="UP" TITLE="Client Interfaces" HREF="client-interfaces.html"><LINK REL="PREVIOUS" TITLE="Example Program" HREF="lo-examplesect.html"><LINK REL="NEXT" TITLE="The Concept" HREF="ecpg-concept.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="2008-03-15T03:19:10"></HEAD ><BODY CLASS="CHAPTER" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="5" ALIGN="center" VALIGN="bottom" >PostgreSQL 8.3.1 Documentation</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="lo-examplesect.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="largeobjects.html" >Fast Backward</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="top" ><A HREF="information-schema.html" >Fast Forward</A ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="top" ><A HREF="ecpg-concept.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="CHAPTER" ><H1 ><A NAME="ECPG" ></A >Chapter 32. <SPAN CLASS="APPLICATION" >ECPG</SPAN > - Embedded <ACRONYM CLASS="ACRONYM" >SQL</ACRONYM > in C</H1 ><DIV CLASS="TOC" ><DL ><DT ><B >Table of Contents</B ></DT ><DT >32.1. <A HREF="ecpg-concept.html" >The Concept</A ></DT ><DT >32.2. <A HREF="ecpg-connect.html" >Connecting to the Database Server</A ></DT ><DT >32.3. <A HREF="ecpg-disconnect.html" >Closing a Connection</A ></DT ><DT >32.4. <A HREF="ecpg-commands.html" >Running SQL Commands</A ></DT ><DT >32.5. <A HREF="ecpg-set-connection.html" >Choosing a Connection</A ></DT ><DT >32.6. <A HREF="ecpg-variables.html" >Using Host Variables</A ></DT ><DD ><DL ><DT >32.6.1. <A HREF="ecpg-variables.html#AEN33385" >Overview</A ></DT ><DT >32.6.2. <A HREF="ecpg-variables.html#AEN33392" >Declare Sections</A ></DT ><DT >32.6.3. <A HREF="ecpg-variables.html#AEN33403" >Different types of host variables</A ></DT ><DT >32.6.4. <A HREF="ecpg-variables.html#AEN33442" ><TT CLASS="COMMAND" >SELECT INTO</TT > and <TT CLASS="COMMAND" >FETCH INTO</TT ></A ></DT ><DT >32.6.5. <A HREF="ecpg-variables.html#AEN33460" >Indicators</A ></DT ></DL ></DD ><DT >32.7. <A HREF="ecpg-dynamic.html" >Dynamic SQL</A ></DT ><DT >32.8. <A HREF="ecpg-pgtypes.html" >pgtypes library</A ></DT ><DD ><DL ><DT >32.8.1. <A HREF="ecpg-pgtypes.html#AEN33490" >The numeric type</A ></DT ><DT >32.8.2. <A HREF="ecpg-pgtypes.html#AEN33666" >The date type</A ></DT ><DT >32.8.3. <A HREF="ecpg-pgtypes.html#AEN34056" >The timestamp type</A ></DT ><DT >32.8.4. <A HREF="ecpg-pgtypes.html#AEN34354" >The interval type</A ></DT ><DT >32.8.5. <A HREF="ecpg-pgtypes.html#AEN34398" >The decimal type</A ></DT ><DT >32.8.6. <A HREF="ecpg-pgtypes.html#AEN34418" >errno values of pgtypeslib</A ></DT ><DT >32.8.7. <A HREF="ecpg-pgtypes.html#AEN34482" >Special constants of pgtypeslib</A ></DT ></DL ></DD ><DT >32.9. <A HREF="ecpg-informix-compat.html" ><SPAN CLASS="PRODUCTNAME" >Informix</SPAN > compatibility mode</A ></DT ><DD ><DL ><DT >32.9.1. <A HREF="ecpg-informix-compat.html#AEN34518" >Additional embedded SQL statements</A ></DT ><DT >32.9.2. <A HREF="ecpg-informix-compat.html#AEN34529" >Additional functions</A ></DT ><DT >32.9.3. <A HREF="ecpg-informix-compat.html#AEN35074" >Additional constants</A ></DT ></DL ></DD ><DT >32.10. <A HREF="ecpg-descriptors.html" >Using SQL Descriptor Areas</A ></DT ><DT >32.11. <A HREF="ecpg-errors.html" >Error Handling</A ></DT ><DD ><DL ><DT >32.11.1. <A HREF="ecpg-errors.html#AEN35272" >Setting Callbacks</A ></DT ><DT >32.11.2. <A HREF="ecpg-errors.html#AEN35353" >sqlca</A ></DT ><DT >32.11.3. <A HREF="ecpg-errors.html#AEN35399" ><TT CLASS="LITERAL" >SQLSTATE</TT > vs <TT CLASS="LITERAL" >SQLCODE</TT ></A ></DT ></DL ></DD ><DT >32.12. <A HREF="ecpg-preproc.html" >Preprocessor directives</A ></DT ><DD ><DL ><DT >32.12.1. <A HREF="ecpg-preproc.html#AEN35570" >Including files</A ></DT ><DT >32.12.2. <A HREF="ecpg-preproc.html#AEN35585" >The #define and #undef directives</A ></DT ><DT >32.12.3. <A HREF="ecpg-preproc.html#AEN35604" >ifdef, ifndef, else, elif and endif directives</A ></DT ></DL ></DD ><DT >32.13. <A HREF="ecpg-process.html" >Processing Embedded SQL Programs</A ></DT ><DT >32.14. <A HREF="ecpg-library.html" >Library Functions</A ></DT ><DT >32.15. <A HREF="ecpg-develop.html" >Internals</A ></DT ></DL ></DIV ><A NAME="AEN33207" ></A ><A NAME="AEN33210" ></A ><A NAME="AEN33212" ></A ><P > This chapter describes the embedded <ACRONYM CLASS="ACRONYM" >SQL</ACRONYM > package for <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN >. It was written by Linus Tolke (<CODE CLASS="EMAIL" ><<A HREF="mailto:linus@epact.se" >linus@epact.se</A >></CODE >) and Michael Meskes (<CODE CLASS="EMAIL" ><<A HREF="mailto:meskes@postgresql.org" >meskes@postgresql.org</A >></CODE >). Originally it was written to work with <ACRONYM CLASS="ACRONYM" >C</ACRONYM >. It also works with <ACRONYM CLASS="ACRONYM" >C++</ACRONYM >, but it does not recognize all <ACRONYM CLASS="ACRONYM" >C++</ACRONYM > constructs yet. </P ><P > This documentation is quite incomplete. But since this interface is standardized, additional information can be found in many resources about SQL. </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="lo-examplesect.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="ecpg-concept.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Example Program</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="client-interfaces.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >The Concept</TD ></TR ></TABLE ></DIV ></BODY ></HTML >