diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/ecpg.sgml | 8 | ||||
| -rw-r--r-- | doc/src/sgml/ref/ecpg-ref.sgml | 6 |
2 files changed, 12 insertions, 2 deletions
diff --git a/doc/src/sgml/ecpg.sgml b/doc/src/sgml/ecpg.sgml index b332aa435df..e7a53f3c9d0 100644 --- a/doc/src/sgml/ecpg.sgml +++ b/doc/src/sgml/ecpg.sgml @@ -5793,6 +5793,14 @@ EXEC SQL UPDATE Tbl SET col = MYNUMBER; embedded SQL query because in this case the embedded SQL precompiler is not able to see this declaration. </para> + + <para> + If multiple input files are named on the <command>ecpg</command> + preprocessor's command line, the effects of <literal>EXEC SQL + DEFINE</literal> and <literal>EXEC SQL UNDEF</literal> do not carry + across files: each file starts with only the symbols defined + by <option>-D</option> switches on the command line. + </para> </sect2> <sect2 id="ecpg-ifdef"> diff --git a/doc/src/sgml/ref/ecpg-ref.sgml b/doc/src/sgml/ref/ecpg-ref.sgml index f3b6034f42a..43f2d8bdaa7 100644 --- a/doc/src/sgml/ref/ecpg-ref.sgml +++ b/doc/src/sgml/ref/ecpg-ref.sgml @@ -93,10 +93,12 @@ PostgreSQL documentation </varlistentry> <varlistentry> - <term><option>-D <replaceable>symbol</replaceable></option></term> + <term><option>-D <replaceable>symbol</replaceable>[=<replaceable>value</replaceable>]</option></term> <listitem> <para> - Define a C preprocessor symbol. + Define a preprocessor symbol, equivalently to the <command>EXEC SQL + DEFINE</command> directive. If no <replaceable>value</replaceable> is + specified, the symbol is defined with the value <literal>1</literal>. </para> </listitem> </varlistentry> |