在postgresql更新觸發器後更新從一個表格到另一個表格的值

Question

我有兩列表permit_table與列構建器和permit_number weekly_table與列申請人和permit_number。 現在，如果在permit_table的builder列中有任何更新，我需要更新weekly_table的申請者列，其中'old申請人值+新建造者值'，如果來自permit_table的更新的建造者值的許可證編號應該與任何許可證編號在weekly_table中。 我曾與下面的觸發嘗試和功能

CREATE OR REPLACE FUNCTION edmonton.automated_builder_update_trigger_manual() 
RETURNS trigger AS 
$BODY$ 
DECLARE 
    e record; 
BEGIN 

EXECUTE format('Update weekly_table as a 
set applicant = old.applicant||new.builder where old.permit_number = 
a.permit_number'); 


RETURN NULL; 
END; 
$BODY$ 
LANGUAGE plpgsql VOLATILE 
COST 100; 
ALTER FUNCTION edmonton.automated_builder_update_trigger_manual() 
OWNER TO postgres; 

和觸發是

CREATE TRIGGER builder_update_trigger_manual 
AFTER UPDATE 
ON edmonton.permit_table 
FOR EACH ROW 
WHEN (old.builder IS DISTINCT FROM new.builder) 
EXECUTE PROCEDURE edmonton.automated_builder_update_trigger_manual(); 

我得到錯誤「FROM子句中缺少的條目表‘老’。

Answer 1

EXECUTE format('Update weekly_table as a 
set applicant = old.applicant||new.builder where old.permit_number = 
a.permit_number'); 

嘗試更改爲：

EXECUTE format('Update weekly_table as a 
set applicant = ($1).applicant||($2).builder where ($1).permit_number = 
a.permit_number') using old,new;