postgresqlはカーソルとしてINSERTクエリを開くことができません

Question

私はテーブルに動的選択の結果を挿入する動的クエリを生成しようとしています。私のコードは以下の通りです。

CREATE OR REPLACE FUNCTION public.report_get_result(
datekey integer) 
RETURNS setof public.logic_result_rcd 
LANGUAGE 'plpgsql' 
COST 100 
VOLATILE 
AS $BODY$ 

DECLARE 
    LogicID text; 
    SheetName text; 
    Row_ID text; 
    Column_ID text; 
    FromTable text; 
    Operation text; 
    Amount text; 
    CriteriaType_1 text; 
    Function_1 text; 
    Criteria_1 text; 
    CriteriaType_2 text; 
    Function_2 text; 
    Criteria_2 text; 
    CriteriaType_3 text; 
    Function_3 text; 
    Criteria_3 text; 
    sql text; 
    INC Integer; 

begin 
DROP TABLE IF EXISTS loans; 
create temp table loans as 
select * from loan.vfact_state_principal where "DateKey" = datekey; 
DECLARE cursor_logic REFCURSOR; 
BEGIN 
OPEN cursor_logic for SELECT "LogicID" FROM logic_table_rcd; 
LOOP 
    FETCH cursor_logic INTO INC; 
    if not found then exit; 
    end if; 
    BEGIN 

    select into LogicID "LogicID" from public.logic_table_rcd WHERE 
"LogicID" = 1; 
    select into SheetName "SheetName" from public.logic_table_rcd WHERE 
"LogicID" = 1; 
    select into Row_ID "Row_ID" from public.logic_table_rcd WHERE "LogicID" 
= 1; 
    select into Column_ID "Column_ID" from public.logic_table_rcd WHERE 
"LogicID" = 1; 
    select into FromTable "FromTable" from public.logic_table_rcd WHERE 
"LogicID" = 1; 
    select into Operation "Operation" from public.logic_table_rcd WHERE 
"LogicID" = 1; 
    select into Amount "Amount" from public.logic_table_rcd WHERE "LogicID" 
= 1; 
    select into CriteriaType_1 CASE WHEN "CriteriaType_1" <> '' OR 
"CriteriaType_1" is not null THEN (' WHERE "' || "CriteriaType_1" || '"') 
ELSE '' END from public.logic_table_rcd WHERE "LogicID" = 1; 
    select into Function_1 CASE WHEN "Function_1" is null THEN '' ELSE 
"Function_1" END from public.logic_table_rcd WHERE "LogicID" = 1; 
    select into Criteria_1 CASE WHEN "Criteria_1" is null THEN '' ELSE 
"Criteria_1" END from public.logic_table_rcd WHERE "LogicID" = 1; 
    select into CriteriaType_2 CASE WHEN "CriteriaType_2" <> '' OR 
"CriteriaType_2" is not null THEN ' AND "' || "CriteriaType_2" || '"' ELSE 
'' END from public.logic_table_rcd WHERE "LogicID" = 1; 
    select into Function_2 CASE WHEN "Function_2" is null THEN '' ELSE 
"Function_2" END from public.logic_table_rcd WHERE "LogicID" = 1; 
    select into Criteria_2 CASE WHEN "Criteria_2" is null THEN '' ELSE 
"Criteria_2" END from public.logic_table_rcd WHERE "LogicID" = 1; 
    select into CriteriaType_3 CASE WHEN "CriteriaType_3" <> '' or 
"CriteriaType_3" is not null THEN ' AND "' || "CriteriaType_3" || '"' ELSE 
'' END from public.logic_table_rcd WHERE "LogicID" = 1; 
    select into Function_3 CASE WHEN "Function_3" is null THEN '' ELSE 
"Function_3" END from public.logic_table_rcd WHERE "LogicID" = 1; 
    select into Criteria_3 CASE WHEN "Criteria_3" is null THEN '' ELSE 
"Criteria_3" END from public.logic_table_rcd WHERE "LogicID" = 1; 

sql:= 'INSERT INTO public.logic_result_rc SELECT ' || INC::text || ', 1, ' 
|| DateKey::text || ', ''' || 'RCD' || ''', ''' || SheetName::text || ''', ' 
|| Row_ID::text || ', ' 
|| Column_ID::text || ', ' || Operation || '("' || Amount || '")' || ' FROM 
' || FromTable 
    || CriteriaType_1 || ' ' || Function_1 || ' ' || Criteria_1 
    || CriteriaType_2 || ' ' || Function_2 || ' ' || Criteria_2 
    || CriteriaType_3 || ' ' || Function_3 || ' ' || Criteria_3; 

RETURN QUERY EXECUTE sql; 
END; 
END LOOP; 
CLOSE cursor_logic; 
END; 
END; 
$BODY$; 
ALTER FUNCTION public.report_get_result(integer) 
OWNER TO postgres; 

しかし、実行した後、私は次のエラーを取得：

cannot open INSERT query as cursor 

すべての変数が正しく割り当てられています。 insertはカーソルの外側のどこかにある必要がありますか？ INSERT INTO .... FETCH ALL声明はありますか？

Answer 1

デフォルトでINSERTは行を返しません。したがって、フェッチするものはありません。 sql文字列にRETURNING *を追加し、内容をpublic.logic_result_rcに挿入して返すようにしてください。

だから、この希望：RETURN QUERY EXECUTE concat(sql, ' RETURNING *');

基本的な構文は次のとおりです。読みやすさのために変更をフォーマットする

INSERT INTO table_name (column_name [, ...]) 
    VALUES () | query 
    RETURNING * --or list of columns, same syntax like for SELECT