Db2 存储过程错误（在使用它的上下文中无效）

Question

我的问题是当我调用存储过程时它不起作用

drop procedure DELETE_WITH_COMMIT_COUNT1
DB20000I  The SQL command completed successfully.

CREATE PROCEDURE DELETE_WITH_COMMIT_COUNT1(IN v_TABLE_NAME VARCHAR(24), IN v_COMMIT_COUNT INTEGER )
    NOT DETERMINISTIC
    LANGUAGE SQL
P1 : BEGIN

    -- DECLARE Statements
    DECLARE SQLCODE INTEGER;
    DECLARE v_DELETE_QUERY VARCHAR(1024);
    DECLARE v_DELETE_STATEMENT STATEMENT;

P2 : BEGIN
    DECLARE V1 CHAR(24) FOR BIT DATA;
    DECLARE V2 CHAR(24) FOR BIT DATA ;

DECLARE cur1 CURSOR WITH RETURN TO CLIENT FOR select min(MESSAGE_ID),max(MESSAGE_ID) from TESTING where TIMESTAMP between (select TIMESTAMP(date(min(timestamp))) from TESTING with ur) and (select TIMESTAMP(date(min(timestamp))) + 1 day from TESTING with ur) ;

OPEN cur1;
FETCH FROM cur1 INTO V1, V2;

   SET v_DELETE_QUERY = 'DELETE FROM (SELECT 1 FROM ' || v_TABLE_NAME || ' WHERE MESSAGE_ID between V1 and V2 '
        || ' FETCH FIRST ' || RTRIM(CHAR(v_COMMIT_COUNT)) || ' ROWS ONLY) AS DELETE_TABLE';

    PREPARE v_DELETE_STATEMENT FROM v_DELETE_QUERY;

    DEL_LOOP:
        LOOP
            EXECUTE v_DELETE_STATEMENT;
            IF SQLCODE = 100 THEN
                LEAVE DEL_LOOP;
            END IF;
            COMMIT;
        END LOOP;

    COMMIT;
  END P2;
END P1
DB20000I  The SQL command completed successfully.

我的程序已成功创建，但是当我调用它时会发生以下问题：

db2 "call DELETE_WITH_COMMIT_COUNT1 ('TESTING',50)" SQL0206N "V1" 是 在使用它的上下文中无效。 SQLSTATE=42703

更多信息：

db2 "select min(MESSAGE_ID),max(MESSAGE_ID) from TESTING where TIMESTAMP between (select TIMESTAMP(date(min(timestamp))) from TESTING 与 ur) 和 (select TIMESTAMP(date(min(timestamp))) + 1 day from 用你的测试）“

1                                                   2
--------------------------------------------------- ---------------------------------------------------
x'4B5753313032353039313133392020202020202020202020' x'4B5753313032353039313230302020202020202020202020'

  1 record(s) selected.

我想删除这些值之间的记录，我目前在最小和最大消息 ID 之间有 99 条记录

message_id column is defined as CHAR(24) FOR BIT DATA on the table .

Answer 1

你的问题在于这句话：

SET v_DELETE_QUERY = 'DELETE FROM (SELECT 1 FROM ' || v_TABLE_NAME || ' WHERE   MESSAGE_ID between V1 and V2 '
        || ' FETCH FIRST ' || RTRIM(CHAR(v_COMMIT_COUNT)) || ' ROWS ONLY) AS DELETE_TABLE';

在此语句中，您似乎想使用之前声明的变量 V1 和 V2 的值：

' WHERE   MESSAGE_ID between V1 and V2 '

DB2 将其视为字符串文字。相反，请尝试像这样更改这部分语句：

SET v_DELETE_QUERY = 'DELETE FROM (SELECT 1 FROM ' || v_TABLE_NAME || ' WHERE   MESSAGE_ID between ' || V1 || ' and ' || V2
            || ' FETCH FIRST ' || RTRIM(CHAR(v_COMMIT_COUNT)) || ' ROWS ONLY) AS DELETE_TABLE';