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| -rw-r--r-- | doc/src/sgml/ecpg.sgml | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/doc/src/sgml/ecpg.sgml b/doc/src/sgml/ecpg.sgml index 5a2dc4a8ae8..9df09df4d77 100644 --- a/doc/src/sgml/ecpg.sgml +++ b/doc/src/sgml/ecpg.sgml @@ -1890,7 +1890,8 @@ EXEC SQL SELECT b INTO :val :val_ind FROM test1; </programlisting> The indicator variable <varname>val_ind</varname> will be zero if the value was not null, and it will be negative if the value was - null. + null. (See <xref linkend="ecpg-oracle-compat"/> to enable + Oracle-specific behavior.) </para> <para> @@ -9801,6 +9802,42 @@ risnull(CINTTYPE, (char *) &i); </sect2> </sect1> + <sect1 id="ecpg-oracle-compat"> + <title><productname>Oracle</productname> Compatibility Mode</title> + <para> + <command>ecpg</command> can be run in a so-called <firstterm>Oracle + compatibility mode</firstterm>. If this mode is active, it tries to + behave as if it were Oracle <productname>Pro*C</productname>. + </para> + + <para> + Specifically, this mode changes <command>ecpg</command> in three ways: + + <itemizedlist> + <listitem> + <para> + Pad character arrays receiving character string types with + trailing spaces to the specified length + </para> + </listitem> + + <listitem> + <para> + Zero byte terminate these character arrays, and set the indicator + variable if truncation occurs + </para> + </listitem> + + <listitem> + <para> + Set the null indicator to <literal>-1</literal> when character + arrays receive empty character string types + </para> + </listitem> + </itemizedlist> + </para> + </sect1> + <sect1 id="ecpg-develop"> <title>Internals</title> |