</para>

<para>

Any word you declare as a typedef cannot be used asa SQL keyword

Any word you declare as a typedef cannot be used asan SQL keyword

in <literal>EXEC SQL</literal> commands later in the same program.

For example, this won't work:

<programlisting>

</programlisting>

ECPG will report a syntax error for <literal>START

TRANSACTION</literal>, because it no longer

recognizes <literal>START</literal> asa SQL keyword,

recognizes <literal>START</literal> asan SQL keyword,

only as a typedef.

(If you have such a conflict, and renaming the typedef

seems impractical, you could write the SQL command

In <productname>PostgreSQL</productname> releases before v16, use

of SQL keywords as typedef names was likely to result in syntax

errors associated with use of the typedef itself, rather than use

of the name asa SQL keyword. The new behavior is less likely to

of the name asan SQL keyword. The new behavior is less likely to

cause problems when an existing ECPG application is recompiled in

a new <productname>PostgreSQL</productname> release with new

keywords.