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  1. MariaDB Server
  2. MDEV-27359

Crossed JSON_VALID constraint imposes JSON property to a wrong column

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Details

    • Bug
    • Status: Open (View Workflow)
    • Major
    • Resolution: Unresolved
    • 10.5, 10.6, 10.3(EOL), 10.4(EOL), 10.7(EOL), 10.8(EOL)
    • 10.5, 10.6
    • JSON
    • None

    Description

      Notice, in the CREATE statement below the constraint belonging to the column b:

      • Says that the column a is JSON
      • Says nothing that the column b itself is JSON

      However, the constraint actually imposes JSON format on the column b rather than column a.

      DROP TABLE IF EXISTS t1;
      		 
      CREATE TABLE t1 (
      		 
        a VARCHAR(1000),
      		 
        b VARCHAR(1000) CHECK (json_valid(a))
      		 
      );
      		 
      INSERT INTO t1 VALUES ('{"x": "y"}', '{"x": "y"}');
      		 
      SELECT JSON_OBJECT('a', a), JSON_OBJECT('b', b) FROM t1;


      +-------------------------+---------------------+
      		 
      | JSON_OBJECT('a', a)     | JSON_OBJECT('b', b) |
      		 
      +-------------------------+---------------------+
      		 
      | {"a": "{\"x\": \"y\"}"} | {"b": {"x": "y"}}   |
      		 
      +-------------------------+---------------------+

      Notice:

      • a was treated as text
      • b was treated as JSON

      It's opposite to what the CHECK constraint says!

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-27350 Complex CHECK constraint loses JSON property

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. MDEV-27358 Table level CHECK(JSON_VALID()) constraint loses JSON property

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. MDEV-27360 Column level CHECK constraint is not SQL Standard compliant

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. MDEV-27018 IF and COALESCE lose "json" property

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-27370 UNION looses JSON property

          • Major - Major loss of function.
          • Open

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              bar Alexander Barkov
              bar Alexander Barkov
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              Dates

                Created:
                Updated:

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