自动表分区 -PostgreSQL- 错误：format() 的参数太少

Question

我正在尝试使用下面的函数和下面的触发器对我的 oltpsales 表进行自动分区，但随后我尝试在表上执行插入操作，但出现下面的错误代码。我在下面引用了一些主题，欢迎提出建议。

INSERT with dynamic table name in trigger function

Postgres format string using array

错误：format() 的参数太少 上下文：PL/pgSQL 函数 testoltpsales_insert_function() 第 17 行的 EXECUTE

 CREATE TRIGGER testoltpsales_insert_trg
    BEFORE INSERT ON myschema."testoltpsales"
    FOR EACH ROW EXECUTE PROCEDURE testoltpsales_insert_function();

CREATE OR REPLACE FUNCTION testoltpsales_insert_function()
RETURNS TRIGGER AS $$
DECLARE
    partition_date TEXT;
    partition_name TEXT;
    start_of_month TEXT;
    end_of_next_month TEXT;
BEGIN
    partition_date := to_char(NEW."CreateDateTime",'YYYY_MM');
    partition_name := 'testoltpsaless_' || partition_date;
    start_of_month := to_char((NEW."CreateDateTime"),'YYYY-MM') || '-01';
    end_of_next_month := to_char((NEW."CreateDateTime" + interval '1 month'),'YYYY-MM') || '-01';
IF NOT EXISTS
    (SELECT 1
     FROM   information_schema.tables 
     WHERE  table_name = partition_name) 
THEN
    EXECUTE format(E'CREATE TABLE %I (CHECK ( date_trunc(\'day\', %I.CreateDateTime) >= ''%s'' AND date_trunc(\'day\', %I.CreateDateTime) < ''%s'')) INHERITS (myschema."Testoltpsaless")', 
    VARIADIC ARRAY [partition_name, start_of_month,end_of_next_month]);

    RAISE NOTICE 'A partition has been created %', partition_name;

    -- EXECUTE format('GRANT SELECT ON TABLE %I TO readonly', partition_name); -- use this if you use role based permission
END IF;
    EXECUTE format('INSERT INTO %I ("OwnerId","DaddyTable","SaleId","RunId","CreateDateTime","SalesetId","Result","Score","NumberOfMatches" ) VALUES($1,$2,$3,$4,$5,$6,$7,$8,$9)', partition_name) 
    USING NEW."OwnerId",NEW."DaddyTable",NEW."SaleId",NEW."RunId",NEW."CreateDateTime",NEW."SalesetId",NEW."Result",NEW."Score",NEW."NumberOfMatches";

RETURN NULL;
END
$$
LANGUAGE plpgsql;

Answer 1

    EXECUTE format(E'CREATE TABLE %I (CHECK ( date_trunc(\'day\', %I.CreateDateTime) >= ''%s'' AND date_trunc(\'day\',
%I.CreateDateTime) < ''%s'')) INHERITS (myschema."Testoltpsaless")', 
    VARIADIC ARRAY [partition_name, start_of_month,end_of_next_month]); ```

您的格式字符串中有五个格式说明符，但您只传递了三个参数。除非您使用位置格式，例如%1$I，您必须提供相同数量的参数，因为它们是按顺序使用的。

https://www.postgresql.org/docs/current/functions-string.html#FUNCTIONS-STRING-FORMAT