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  1. MariaDB ColumnStore
  2. MCOL-4648

CAST(UBIGINTNULL_inWideDecimal AS UNSIGNED) returns 0 or NULL

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Details

    • 2023-8

    Description

      DROP TABLE IF EXISTS t1;
      		 
      CREATE TABLE t1 (d1 DECIMAL(30,0), d2 DECIMAL(30,0) NOT NULL) ENGINE=ColumnStore;
      		 
      INSERT INTO t1 VALUES (18446744073709551614,18446744073709551614);
      		 
      SELECT d1, CAST(d1 AS UNSIGNED), CAST(d2 AS UNSIGNED) FROM t1;


      +----------------------+----------------------+----------------------+
      		 
      | d1                   | CAST(d1 AS UNSIGNED) | CAST(d2 AS UNSIGNED) |
      		 
      +----------------------+----------------------+----------------------+
      		 
      | 18446744073709551614 |                 NULL |                    0 |
      		 
      +----------------------+----------------------+----------------------+

      The expected result is:

      DROP TABLE IF EXISTS t1;
      		 
      CREATE TABLE t1 (d1 DECIMAL(30,0), d2 DECIMAL(30,0) NOT NULL) ENGINE=InnoDB;
      		 
      INSERT INTO t1 VALUES (18446744073709551614,18446744073709551614);
      		 
      SELECT d1, CAST(d1 AS UNSIGNED), CAST(d2 AS UNSIGNED) FROM t1;


      +----------------------+----------------------+----------------------+
      		 
      | d1                   | CAST(d1 AS UNSIGNED) | CAST(d2 AS UNSIGNED) |
      		 
      +----------------------+----------------------+----------------------+
      		 
      | 18446744073709551614 | 18446744073709551614 | 18446744073709551614 |
      		 
      +----------------------+----------------------+----------------------+

      Note, in ColumnStore the value 18446744073709551614 is reserved for the magic value UBIGINTNULL. So perhaps in ColumnStore we'll have to return 18446744073709551613. But NULL and 0 are certainly wrong.

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          is blocked by

          New Feature - A new feature of the product, which has yet to be developed. MCOL-3574 EMPTY column for persistant storage

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

          Task - A task that needs to be done. MCOL-4361 Replace pow(10.0, (double)scale) expressions with a static dictionary lookup.

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. MCOL-641 Full DECIMAL support in ColumnStore

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MCOL-4632 CAST(hugeNegativeWideDecimal AS SIGNED) returns 0 or NULL

          • Major - Major loss of function.
          • Closed

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              drrtuy Roman
              bar Alexander Barkov
              Roman Roman
              Daniel Lee Daniel Lee (Inactive)
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              Dates

                Created:
                Updated:
                Resolved:

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