動態查詢，參數不適用於哪里

Question

我正在使用oracle上的動態查詢，當我將字符串參數傳遞給處於條件的位置時，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 */
    )

在這里，如果我將值直接保留在該in_column_ids上，則查詢有效。 但是，作為參數傳遞的值似乎不適用於where in 。

任何想法 ？

Answer 1

IMO，您必須使用regexp_substr分割逗號分隔的變量。 您的查詢應如下所示：

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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