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F_KARFREITAG

function from adhoc

Entrypoint karfreitag compatible with UTF-8

Inputs/Outputs

   Input      INTEGER     year
   Output     DATE        date of Easter Friday of the year

Syntax

   TestSQL
   SELECT '06.04.2007' AS ISCORRECT, F_KARFREITAG(2007) FROM RDB$DATABASE;
   SELECT NULL AS ISCORRECT, F_KARFREITAG(NULL) FROM RDB$DATABASE;