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  1. MariaDB Server
  2. MDEV-26711

JSON histograms become invalid due to not properly quoted values

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: N/A
    • Fix Version/s: 10.7.1
    • Component/s: Optimizer
    • Labels:
      None

      Description

      JSON histograms turn out invalid if a column value contains, for example, a double quote mark.

      create or replace table t (a varchar(32));
      		 
      insert into t values ('this is "quoted" text');
      		 
      set histogram_type= JSON_HB;
      		 
      analyze table t persistent for all;
      		 
      select * from t where a = 'foo';
      		 
       
      		 
      # Cleanup
      		 
      drop table t;

      preview-10.7-MDEV-26519-json-histograms da8bb4b4703

      		 
      MariaDB [test]> select * from t where a = 'foo';
      		 
      ERROR 4183 (HY000): Failed to parse histogram: Root JSON element must be a JSON object at offset 0.

        Attachments

          Issue Links

          is caused by

          Task - A task that needs to be done. MDEV-21130 Histograms: use JSON as on-disk format

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

          Task - A task that needs to be done. MDEV-26519 JSON Histograms: improve histogram collection

          • Blocker - Blocks development and/or testing work, production could not run.
          • Closed

            Activity

              People

              Assignee:
              psergei Sergei Petrunia
              Reporter:
              elenst Elena Stepanova
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                Dates

                Created:
                Updated:
                Resolved:

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