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F_ISLEAPYEAR

compatibility to FreeUDFLibC

Entrypoint isleapyear compatible with UTF-8

Inputs/Outputs

   Input      TIMESTAMP      date optionally time 
   Output     INTEGER        1 = is leapyear, 0 = is no leapyear

Syntax

   Y2k-compatible (2000 is a leapyear).
   TestSQL
   SELECT 1 AS ISCORRECT, F_ISLEAPYEAR('22.08.2000 14:38:12') FROM RDB$DATABASE;
   SELECT NULL AS ISCORRECT, F_ISLEAPYEAR(NULL) FROM RDB$DATABASE;