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  1. MariaDB Server
  2. MDEV-10142 PL/SQL parser
  3. MDEV-12874

UPDATE statements with the same source and target

Details

    • 10.2.2-3, 10.2.2-1, 10.2.2-2, 10.2.2-4, 10.1.18

    Description

      This script works fine in Oracle (and PostgreSQL):

      DROP TABLE t1;
      		 
      CREATE TABLE t1 (c1 INT, c2 INT);
      		 
      INSERT INTO t1 VALUES (10,10);
      		 
      INSERT INTO t1 VALUES (20,20);
      		 
      UPDATE t1 SET c1=c1+1 WHERE c2=(SELECT MAX(c2) FROM t1);
      		 
      SELECT * FROM t1;


      SQL> SELECT * FROM t1; 
       
      		 
      	C1	   C2
      		 
      ---------- ----------
      		 
      	10	   10
      		 
      	21	   20

      Notice, the table t1 is used twice in the UPDATE query, as a target and as a source.

      Under term of this tasks will allow to use the same table as a source and as a target in UPDATE statements in MariaDB.

      Currently its not allowed and returns this error:

      ERROR 1093 (HY000): Table 't1' is specified twice, both as a target for 'UPDATE' and as a separate source for data

      Attachments

        Issue Links

          is blocked by

          Task - A task that needs to be done. MDEV-13911 Support ORDER BY and LIMIT in multi-table update

          • Major - Major loss of function.
          • Closed
          relates to

          Technical task - A technical task. MDEV-12137 DELETE statement with the same source and target

          • Major - Major loss of function.
          • Closed
          links to

          Web Link patch

          Activity

            Ascending order - Click to sort in descending order
            bar Alexander Barkov created issue -
            bar Alexander Barkov made changes -
            Field Original Value New Value
            bar Alexander Barkov made changes -
            Labels Compatibility
            bar Alexander Barkov made changes -
            Summary MDEV-12137 UPDATE statements with the same source and target UPDATE statements with the same source and target
            serg Sergei Golubchik made changes -
            Assignee Sergei Golubchik [ serg ]
            serg Sergei Golubchik made changes -
            Priority Major [ 3 ] Critical [ 2 ]
            serg Sergei Golubchik made changes -
            serg Sergei Golubchik made changes -
            Status Open [ 1 ] In Progress [ 3 ]
            serg Sergei Golubchik made changes -
            Status In Progress [ 3 ] In Review [ 10002 ]
            serg Sergei Golubchik made changes -
            Description This script works fine in Oracle (and PostgreSQL):
            {code:sql}
            DROP TABLE t1;
            CREATE TABLE t1 (c1 INT, c2 INT);
            INSERT INTO t1 VALUES (10,10);
            INSERT INTO t1 VALUES (20,20);
            UPDATE t1 SET c1=c1+1 WHERE c2=(SELECT MAX(c2) FROM t1);
            SELECT * FROM t1;
            {code}
            {noformat}
            SQL> SELECT * FROM t1;

            C1 C2
            ---------- ----------
            10 10
            21 20
            {noformat}
            Notice, the table {{t1}} is used twice in the {{UPDATE}} query, as a target and as a source.

            Under term of this tasks will allow to use the same table as a source and as a target in {{UPDATE}} statements in MariaDB.

            Currently its not allowed and returns this error:
            {noformat}
            ERROR 1093 (HY000): Table 't1' is specified twice, both as a target for 'UPDATE' and as a separate source for data
            {noformat}
            		This script works fine in Oracle (and PostgreSQL):
            {code:sql}
            DROP TABLE t1;
            CREATE TABLE t1 (c1 INT, c2 INT);
            INSERT INTO t1 VALUES (10,10);
            INSERT INTO t1 VALUES (20,20);
            UPDATE t1 SET c1=c1+1 WHERE c2=(SELECT MAX(c2) FROM t1);
            SELECT * FROM t1;
            {code}
            {noformat}
            SQL> SELECT * FROM t1;

            C1 C2
            ---------- ----------
            10 10
            21 20
            {noformat}
            Notice, the table {{t1}} is used twice in the {{UPDATE}} query, as a target and as a source.

            Under term of this tasks will allow to use the same table as a source and as a target in {{UPDATE}} statements in MariaDB.

            Currently its not allowed and returns this error:
            {noformat}
            ERROR 1093 (HY000): Table 't1' is specified twice, both as a target for 'UPDATE' and as a separate source for data
            {noformat}
            serg Sergei Golubchik made changes -
            serg Sergei Golubchik made changes -
            serg Sergei Golubchik made changes -
            Status In Review [ 10002 ] Stalled [ 10000 ]
            serg Sergei Golubchik made changes -
            serg Sergei Golubchik made changes -
            Fix Version/s 10.3.2 [ 22533 ]
            Fix Version/s 10.3 [ 22126 ]
            Resolution Fixed [ 1 ]
            Status Stalled [ 10000 ] Closed [ 6 ]
            alvinr Alvin Richards (Inactive) made changes -
            Parent Issue MDEV-10764 [ MDEV-10764 ] MDEV-10142 [ MDEV-10142 ]
            serg Sergei Golubchik made changes -
            Workflow MariaDB v3 [ 80892 ] MariaDB v4 [ 152202 ]

            People

              serg Sergei Golubchik
              bar Alexander Barkov
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              Dates

                Created:
                Updated:
                Resolved:

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