Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-8897

Integer type columns silently truncate fractional digits

        Details

        • Type: Bug
        • Status: Open
        • Priority: Major
        • Resolution: Unresolved
        • Affects Version/s: 10.1, 10.0, 5.5
        • Fix Version/s: 10.1
        • Component/s: OTHER
        • Labels:

          Description

          This script:

          DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (10.1)

          produces no warnings or notes though truncation happens.

          The DECIMAL data type in the same scenario does produce a note:

           DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a DECIMAL(10,0));
INSERT INTO t1 VALUES (10.1);
SHOW WARNINGS;

          +-------+------+----------------------------------------+
| Level | Code | Message                                |
+-------+------+----------------------------------------+
| Note  | 1265 | Data truncated for column 'a' at row 1 |
+-------+------+----------------------------------------+

          CAST from DECIMAL to INT on SELECT also does not produce warnings:

          DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a DECIMAL(10,1));
INSERT INTO t1 VALUES (10.1);
SELECT CAST(a AS SIGNED) FROM t1;

            Gliffy Diagrams

              Attachments

                Activity

                Hide
                Permalink
                bar Alexander Barkov added a comment -

                Repeatable in MySQL-5.7

                Show
                bar Alexander Barkov added a comment - Repeatable in MySQL-5.7

                  People

                  • Assignee:
                    bar Alexander Barkov
                    Reporter:
                    bar Alexander Barkov
                  • Votes:
                    0 Vote for this issue
                    Watchers:
                    1 Start watching this issue

                    Dates

                    • Created:
                      Updated: