MSCCP0011

Nested cursor inside query is not supported in Snowflake

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Severity

Medium

Description

This error is used to indicate that a cursor definition exists within a query. A cursor expression returns a nested cursor, a nested cursor is implicitly opened when the cursor expression is evaluated. For more information please refer to Oracle Cursor Expression.

Code example

Oracle

Input

SELECT
      category_id,
      category_name,
      CURSOR
      (
        SELECT
          product_id,
          product_name
          ||', '
          ||category_id
        FROM
          products e
        WHERE
          e.category_id = d.category_id
      ) EMP_CUR
  FROM
    categories d;

Output

SELECT
      category_id,
      category_name,
      --** MSC-ERROR - MSCCP0011 - NESTED CURSOR INSIDE QUERY IS NOT SUPPORTED IN SNOWFLAKE. **
      CURSOR
            /*** MSC-ERROR - MSCCP0001 - THE FOLLOWING SUBQUERY MATCHES AT LEAST ONE OF THE PATTERNS CONSIDERED INVALID AND MAY PRODUCE COMPILATION ERRORS ***/
      (
        SELECT
          product_id,
          NVL(
          product_name :: STRING, '') || ', ' || NVL(category_id :: STRING, '')
        FROM
          products e
        WHERE
          e.category_id = d.category_id
      ) EMP_CUR
  FROM
      categories d;

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