合併聲明與臨時表

Question

CREATE OR REPLACE FUNCTION public.merge_test (
    r_obj refcursor, 
    _ldeptid character varying 
) RETURNS refcursor 
    LANGUAGE 'plpgsql' COST 100.0 VOLATILE AS $function$ 
BEGIN 
    DROP TABLE IF EXISTS tblCumulate;  
    create temp table tblCumulate (
     lCompid varchar(10), 
     lOpenCount int default 0, 
     lClosedCount int default 0 
    ); 
    DROP TABLE IF EXISTS tblOpen; 
    create temp table tblOpen (
     lOSID SERIAL, 
     lCount numeric(24,0), 
     lCompid varchar(100) 
    ); 
    MERGE into tblCumulate CUM using (select lcompid,lCount from tblopen) as OP 
     on CUM.lcompid=OP.lcompid 
     when matched 
     then update set cum.lOpenCount=op.lcount 
     when not matched 
     then insert (lCompid,lOpenCount) values op.lcompid,op.lcount); 
    open r_obj for 
     select * from tblCumulate; 
    return r_obj; 
END; 
$function$; 

當我執行（運行）此過程顯示以下錯誤。

ERROR: "tblcumulate" is not a known variable 
LINE 41: MERGE into tblCumulate CUM temp 

Answer 1

PostgreSQL中沒有MERGE語句。

考慮使用INSERT ... ON CONFLICT。