Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-13119

Wrong results with CAST(AS CHAR) and subquery

    XMLWordPrintable

Details

    Description

      This problem is similar to MDEV-10306

      This script:

      SET optimizer_switch=_utf8'derived_merge=on';
      		 
      DROP TABLE IF EXISTS t1;
      		 
      CREATE TABLE t1 (t VARCHAR(10) CHARSET latin1);
      		 
      INSERT INTO t1 VALUES('abcdefghi');
      		 
      SELECT CONCAT(t2,'-',t2) c2 FROM (SELECT CAST(t AS CHAR CHARACTER SET utf8) t2 FROM t1) sub;

      returns a wrong result:

      +--------------------+
      		 
      | c2                 |
      		 
      +--------------------+
      		 
      | abcdefghiabcdefghi |
      		 
      +--------------------+

      Notice, there is no the expected dash character in the result.

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-13120 Wrong results with MAKE_SET() and subquery

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-13790 UNHEX() of a somewhat complicated CONCAT() returns NULL

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-10306 Wrong results with combination of CONCAT, SUBSTR and CONVERT in subquery

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

          Activity

            People

              bar Alexander Barkov
              bar Alexander Barkov
              Votes:
              0 Vote for this issue
              Watchers:
              2 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                Git Integration

                  Error rendering 'com.xiplink.jira.git.jira_git_plugin:git-issue-webpanel'. Please contact your Jira administrators.