呼叫功能PostgreSQL的

Question

我要插入從功能表lokasi ...但是，當我把這些功能也有錯誤...請你的答案

CREATE OR REPLACE FUNCTION insert_lokasi2 
    (anip character varying, aeksemplar character varying) 
RETURNS boolean AS 
$BODY$ 

DECLARE 
    eks integer; 
    tot integer; 
    nilai boolean; 
    eks1 integer; 
    eks2 integer; 
    tot2 integer; 

BEGIN 

    select sum(CAST(eksemplar AS INT)) 
    INTO eks 
    from lokasi 
    where nip = anip; 

    tot := eks + aeksemplar; 

    select CAST(eksemplar AS INT) 
    INTO eks1 
    from sensus 
    where nip = anip; 

    select CAST(eksemplar2 AS INT) 
    INTO eks2 
    from sensus 
    where nip = anip; 

    tot2 := eks1 + eks2; 

    IF (tot <> tot2) THEN 
    nilai := false; 
    else 
    nilai := true; 
    END IF; 

    RETURN nilai; 

END 

$BODY$ 

    LANGUAGE 'plpgsql' VOLATILE 

    COST 100; 

    ALTER FUNCTION insert_lokasi2(character varying, character varying) OWNER TO postgres; 

    select * from insert_lokasi2('10.1010.4703','1'); 

錯誤：運營商不存在：整數+字符改變

LINE 1: SELECT $1 + $2 
        ^
HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts. 
QUERY: SELECT $1 + $2 
CONTEXT: PL/pgSQL function "insert_lokasi2" line 12 at assignment 

Answer 1

eks是同時aeksemplar的整數是一個字符串。你可以通過你的另外需要投：

tot := eks + CAST(aeksemplar AS INT) 

更好的將是要麼做所有這些鑄件在finction的頂部，或者，如果可能的話，改變參數類型，使鑄件是不必要的。