Teradata Dynamic SQL 与绑定变量？

Question

是否可以在 Teradata 动态 SQL 语句中使用绑定变量？我在任何地方都找不到例子。我想做这样的事情：

DECLARE SQLString VARCHAR(1000)
SET SQLString = 'SELECT * FROM MyTable WHERE ColumnA = :variable1';

EXECUTE IMMEDIATE SQLString; --Can I pass something here for variable1 or do I have to concatenate and not use a bind variable?

谢谢

Answer 1

带绑定变量的DML语句通常会执行多次，所以使用EXECUTE IMMEDIATE时没有绑定变量，必须使用EXECUTE/PREPARE:

DECLARE SQLstring VARCHAR(1000);
SET SQLstring = 'update MyTable SET ColumnA = ? where columnB = ?'; -- ? identify bind variables
PREPARE S1 FROM SQLstring;
EXECUTE S1 USING variable1, variable2;

见Stored Procedure manual

Teradata Dynamic SQL 与绑定变量？

Teradata Dynamic SQL with Bind Variables?

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