diff options
Diffstat (limited to 'doc/src/sgml/file-fdw.sgml')
| -rw-r--r-- | doc/src/sgml/file-fdw.sgml | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/doc/src/sgml/file-fdw.sgml b/doc/src/sgml/file-fdw.sgml index 9385b26d34d..d3b39aa120b 100644 --- a/doc/src/sgml/file-fdw.sgml +++ b/doc/src/sgml/file-fdw.sgml @@ -112,11 +112,11 @@ </variablelist> <para> - Note that while <command>COPY</> allows options such as OIDS and HEADER + Note that while <command>COPY</> allows options such as OIDS and HEADER to be specified without a corresponding value, the foreign data wrapper - syntax requires a value to be present in all cases. To activate + syntax requires a value to be present in all cases. To activate <command>COPY</> options normally supplied without a value, you can - instead pass the value TRUE. + instead pass the value TRUE. </para> <para> @@ -140,6 +140,21 @@ </listitem> </varlistentry> + <varlistentry> + <term><literal>force_null</literal></term> + + <listitem> + <para> + This is a Boolean option. If true, it specifies that values of the + column which match the null string are returned as <literal>NULL</> + even if the value is quoted. Without this option, only unquoted + values matching the null string are returned as <literal>NULL</>. + This has the same effect as listing the column in + <command>COPY</>'s <literal>FORCE_NULL</literal> option. + </para> + </listitem> + </varlistentry> + </variablelist> <para> |