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  1. MariaDB Server
  2. MDEV-27358

Table level CHECK(JSON_VALID()) constraint loses JSON property

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Details

    • Bug
    • Status: Open (View Workflow)
    • Major
    • Resolution: Unresolved
    • 10.3(EOL), 10.4(EOL), 10.5, 10.6, 10.7(EOL), 10.8(EOL)
    • 10.5, 10.6
    • JSON

    Description

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


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

      Notice, it did not recognize that the column is JSON and escapes it as plain text.

      If I run a similar script with Oracle, JSON is recognized and does not get escaped:

      DROP TABLE t1;
      		 
      CREATE TABLE t1 (
      		 
        a VARCHAR(1000),
      		 
        CONSTRAINT ensure_a_json CHECK (a IS JSON)
      		 
      );
      		 
      INSERT INTO t1 VALUES ('{"x": "y"}');
      		 
      SELECT JSON_OBJECT('a' VALUE a) FROM t1;


      JSON_OBJECT('A'VALUEA)
      		 
      {"a":{"x": "y"}}

      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-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-27359 Crossed JSON_VALID constraint imposes JSON property to a wrong column

          • 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-27370 UNION looses JSON property

          • Major - Major loss of function.
          • Open

          Activity

            People

              bar Alexander Barkov
              bar Alexander Barkov
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              Dates

                Created:
                Updated:

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