diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/file-fdw.sgml | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/doc/src/sgml/file-fdw.sgml b/doc/src/sgml/file-fdw.sgml index 8497d9a45f5..dd712e92636 100644 --- a/doc/src/sgml/file-fdw.sgml +++ b/doc/src/sgml/file-fdw.sgml @@ -111,14 +111,37 @@ </variablelist> <para> - <command>COPY</>'s <literal>OIDS</literal>, <literal>FORCE_QUOTE</literal>, - and <literal>FORCE_NOT_NULL</literal> options are currently not supported by + A column of a foreign table created using this wrapper can have the + following options: + </para> + + <variablelist> + + <varlistentry> + <term><literal>force_not_null</literal></term> + + <listitem> + <para> + This is a boolean option. If true, it specifies that values of the + column should not be matched against the null string (that is, the + file-level <literal>null</literal> option). This has the same effect + as listing the column in <command>COPY</>'s + <literal>FORCE_NOT_NULL</literal> option. + </para> + </listitem> + </varlistentry> + + </variablelist> + + <para> + <command>COPY</>'s <literal>OIDS</literal> and + <literal>FORCE_QUOTE</literal> options are currently not supported by <literal>file_fdw</>. </para> <para> - These options can only be specified for a foreign table, not in the - options of the <literal>file_fdw</> foreign-data wrapper, nor in the + These options can only be specified for a foreign table or its columns, not + in the options of the <literal>file_fdw</> foreign-data wrapper, nor in the options of a server or user mapping using the wrapper. </para> |