diff options
| author | Tom Lane | 2025-01-22 20:18:40 +0000 |
|---|---|---|
| committer | Tom Lane | 2025-01-22 20:18:50 +0000 |
| commit | 172e6b3adb2e2749883ad0746172e4cf97139961 (patch) | |
| tree | 9adaf69a8bbd51298bdc6385dc7a56b7f7501ca0 /doc/src/sgml/func.sgml | |
| parent | f0ee648527e54c465e398d993db892af61a228da (diff) | |
Support RN (roman-numeral format) in to_number().
We've long had roman-numeral output support in to_char(),
but lacked the reverse conversion. Here it is.
Author: Hunaid Sohail <[email protected]>
Reviewed-by: Maciek Sakrejda <[email protected]>
Reviewed-by: Tom Lane <[email protected]>
Reviewed-by: Tomas Vondra <[email protected]>
Discussion: https://postgr.es/m/CAMWA6ybh4M1VQqpmnu2tfSwO+3gAPeA8YKnMHVADeB=XDEvT_A@mail.gmail.com
Diffstat (limited to 'doc/src/sgml/func.sgml')
| -rw-r--r-- | doc/src/sgml/func.sgml | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml index 47370e581ae..5678e7621a5 100644 --- a/doc/src/sgml/func.sgml +++ b/doc/src/sgml/func.sgml @@ -8669,8 +8669,8 @@ SELECT regexp_match('abc01234xyz', '(?:(.*?)(\d+)(.*)){1,1}'); <entry>plus/minus sign in specified position</entry> </row> <row> - <entry><literal>RN</literal></entry> - <entry>Roman numeral (input between 1 and 3999)</entry> + <entry><literal>RN</literal> or <literal>rn</literal></entry> + <entry>Roman numeral (values between 1 and 3999)</entry> </row> <row> <entry><literal>TH</literal> or <literal>th</literal></entry> @@ -8798,6 +8798,19 @@ SELECT regexp_match('abc01234xyz', '(?:(.*?)(\d+)(.*)){1,1}'); (e.g., <literal>9.99EEEE</literal> is a valid pattern). </para> </listitem> + + <listitem> + <para> + In <function>to_number()</function>, the <literal>RN</literal> + pattern converts Roman numerals (in standard form) to numbers. + Input is case-insensitive, so <literal>RN</literal> + and <literal>rn</literal> are equivalent. <literal>RN</literal> + cannot be used in combination with any other formatting patterns or + modifiers except <literal>FM</literal>, which is applicable only + in <function>to_char()</function> and is ignored + in <function>to_number()</function>. + </para> + </listitem> </itemizedlist> </para> |