插入表 Teradata 动态存储过程 SQL [英] Insert Into table Teradata dynamic stored procedure SQL

问题描述

我正在尝试在 Teradata 中创建一个可以接受各种参数的存储过程.我的查询有 4 次 SQL，它创建了 3 个易失性表.在 Select 语句中是我需要动态的 SQL，这就是我遇到问题的地方.

I am trying to create a Stored Procedure in Teradata that will accept various arguments. My query has 4 passes of SQL where it creates 3 lots of volatile tables. Within the Select statements is the SQL that I need to be dynamic and this is where I run into problems.

这是我的 SQL:

CREATE PROCEDURE "mydb"."test_sp20" (DepID integer) --DepID is my parameter
DYNAMIC RESULT SETS 1 SQL SECURITY OWNER
BEGIN

DECLARE q1 VARCHAR(10000);
DECLARE cur1 CURSOR WITH RETURN ONLY TO client FOR s1;

CREATE VOLATILE TABLE mydb.tbl_1 , no fallback, no log(
Consumer_Unit_Id    INTEGER, 
Price_Promotion_Id  INTEGER, 
Promotion_Id    INTEGER)
primary index (Consumer_Unit_Id, Price_Promotion_Id, Promotion_Id) on commit preserve rows ;

INSERT INTO mydb.tbl_1
SELECT * FROM mydb.tbl_1
SET q1 = 'Select * from mydb.tbl_1'
PREPARE s1 FROM q1;
OPEN cur1;
END;

这作为带有静态 SQL 的 SP 工作正常，但我需要 Select 语句是动态的，因为在其中我有我希望能够传递的 Department 和 Sections 参数.例如

This works fine as a SP with static SQL but I need the Select statements to be dynamic in that within them I have Department and Sections parameters that I want to be able to pass accross. e.g.

INSERT INTO mydb.tbl_1
SQL = 'Select * from mydb.tbl_1 where Department_ID = ' || DepID ||'

我也试过:

SQL = 'INSERT INTO Select * from mydb.tbl_1 where Department_ID = ' || DepID ||'

在这两种情况下，我都会收到以下错误:

In both cases I get the following error:

7683:  TEST_SP20:Invalid statement specified inside a dynamic declare cursor/SQL statement

我似乎可以有一个动态 SQL 字符串，但我不能有一个 INSERT INTO SELECT 字符串??

I seem to be able to have a dynamic SQL string but I can't have a INSERT INTO SELECT string??

@dnoeth 帮助我开始了这项工作，因此非常感谢您提供更多帮助.

@dnoeth helped me get this started so any more help is much appreciated.

推荐答案

你没有告诉你要INSERT/SELECT 使用动态 SQL，只有当你想返回时才需要一个游标来自您的 SP 的结果集.

You didn't tell that you want to INSERT/SELECT using Dynamic SQL, a cursor is only needed when you want to return a result set from your SP.

DECLARE q1 VARCHAR(10000);

SET q1 = 'INSERT INTO Select * from mydb.tbl_1 where Department_ID = ' || TRIM(DepID) ||';';

EXECUTE IMMEDIATE q1;

但如果只有传递给 WHERE 条件的值应该是动态的，您最好应用一个准备好的语句(可以多次使用):

But if only the values passed to the WHERE-condition are supposed to be dynamic you might better apply a prepared statement (which could be used multiple times):

SET q1 = 'INSERT INTO Select * from mydb.tbl_1 where Department_ID = ?;';

PREPARE stmt FROM q1;

EXECUTE stmt USING DepID;

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