Gbase 8C function / stored procedure definition

GBase 8c Functions or stored procedures are stored on the database server and can be used SQL A set of interface calls SQL And procedure statements ( Statement , Distribute , loop , Control process, etc ). It helps you perform operations that typically perform multiple queries and round trips in a single function in the database .

Can be in multiple languages ( Such as SQL,PL/pgSQL,C,Python etc. ) Created in GBase 8c function / stored procedure .

grammar ：

CREATE [ OR REPLACE ] FUNCTION

    name ( [ [ argmode ] [ argname ] argtype [ { DEFAULT | = } default_expr ] [, ...] ] )

    [ RETURNS rettype

      | RETURNS TABLE ( column_name column_type [, ...] ) ]

  { LANGUAGE lang_name

    | TRANSFORM { FOR TYPE type_name } [, ... ]

    | WINDOW

    | IMMUTABLE | STABLE | VOLATILE | [ NOT ] LEAKPROOF

    | CALLED ON NULL INPUT | RETURNS NULL ON NULL INPUT | STRICT

    | [ EXTERNAL ] SECURITY INVOKER | [ EXTERNAL ] SECURITY DEFINER

    | PARALLEL { UNSAFE | RESTRICTED | SAFE }

    | COST execution_cost

    | ROWS result_rows

    | SET configuration_parameter { TO value | = value | FROM CURRENT }

    | AS 'definition'

    | AS 'obj_file', 'link_symbol'

  } ...

    [ WITH ( attribute [, ...] ) ]