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>PostgreSQL 8.4.20 Documentation</TH
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><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#AEN36743"
>Overview</A
></DT
><DT
>32.6.2. <A
HREF="ecpg-variables.html#AEN36750"
>Declare Sections</A
></DT
><DT
>32.6.3. <A
HREF="ecpg-variables.html#AEN36761"
>Different types of host variables</A
></DT
><DT
>32.6.4. <A
HREF="ecpg-variables.html#AEN36800"
><TT
CLASS="COMMAND"
>SELECT INTO</TT
> and <TT
CLASS="COMMAND"
>FETCH INTO</TT
></A
></DT
><DT
>32.6.5. <A
HREF="ecpg-variables.html#AEN36818"
>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#AEN36848"
>The numeric type</A
></DT
><DT
>32.8.2. <A
HREF="ecpg-pgtypes.html#AEN37024"
>The date type</A
></DT
><DT
>32.8.3. <A
HREF="ecpg-pgtypes.html#AEN37417"
>The timestamp type</A
></DT
><DT
>32.8.4. <A
HREF="ecpg-pgtypes.html#AEN37716"
>The interval type</A
></DT
><DT
>32.8.5. <A
HREF="ecpg-pgtypes.html#AEN37760"
>The decimal type</A
></DT
><DT
>32.8.6. <A
HREF="ecpg-pgtypes.html#AEN37780"
>errno values of pgtypeslib</A
></DT
><DT
>32.8.7. <A
HREF="ecpg-pgtypes.html#AEN37844"
>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#AEN37880"
>Additional embedded SQL statements</A
></DT
><DT
>32.9.2. <A
HREF="ecpg-informix-compat.html#AEN37891"
>Additional functions</A
></DT
><DT
>32.9.3. <A
HREF="ecpg-informix-compat.html#AEN38436"
>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#AEN38634"
>Setting Callbacks</A
></DT
><DT
>32.11.2. <A
HREF="ecpg-errors.html#AEN38715"
>sqlca</A
></DT
><DT
>32.11.3. <A
HREF="ecpg-errors.html#AEN38761"
><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#AEN38932"
>Including files</A
></DT
><DT
>32.12.2. <A
HREF="ecpg-preproc.html#AEN38947"
>The #define and #undef directives</A
></DT
><DT
>32.12.3. <A
HREF="ecpg-preproc.html#AEN38966"
>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="AEN36565"
></A
><A
NAME="AEN36568"
></A
><A
NAME="AEN36570"
></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
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