sql - 动态查询，参数不适用于 where in

Question

我正在使用 oracle 上的动态查询，当我传递条件中的字符串参数时，它不起作用。

for x in (
            SELECT DISTINCT column_id
            FROM table
            WHERE column_id in (in_column_ids)          
            /* WHERE column_id in (15,16,17) =>works */
            /* => in_column_ids is a varchar type which 
                  holds comma separated value */
            and column_title=in_column_title /* works */
    )

在这里，如果我将值直接保留在该 in_column_ids 上，则查询有效。但是，作为参数传递的值似乎不适用于where in.

任何想法 ？

Answer 1

IMO，您必须使用regexp_substr拆分逗号分隔变量。您的查询应该是这样的：

for x in (
            SELECT DISTINCT column_id
            FROM table
            WHERE column_id in (
            SELECT DISTINCT regexp_substr(in_column_ids,'[^,]+', 1, LEVEL) FROM DUAL
            CONNECT BY regexp_substr(in_column_ids, '[^,]+', 1, LEVEL) IS NOT NULL
            )          
            /* WHERE column_id in (15,16,17) =>works */
            /* => in_column_ids is a varchar type which 
                  holds comma separated value */
            and column_title=in_column_title /* works */
    )

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