[mythtv-commits] Ticket #13577: fixes/31 mythfrontend interworking with mythbackend on Xubuntu 20.04 Daily build

[MythTV]

#13577: fixes/31 mythfrontend interworking with mythbackend on Xubuntu 20.04 Daily
build
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 Reporter:  Mike Bibbings         |          Owner:  Bill Meek
     Type:  Bug Report - General  |         Status:  closed
 Priority:  minor                 |      Milestone:  31.1
Component:  MythTV - General      |        Version:  v31-fixes
 Severity:  medium                |     Resolution:  Fixed
 Keywords:                        |  Ticket locked:  0
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Changes (by Bill Meek):

 * status:  accepted => closed
 * resolution:   => Fixed


Comment:

 Manually closing this:

     Plugins/dbcheck: Replace CHARACTER SET 'default' with 'utf8'

     Fix required for MySQL v8 because using 'default' CHARACTER
     SET results in a "You have an error in your SQL syntax"
     message.

     There are two issues to solve.

      1. New systems that will execute the DBSchemaVer changes
         for the mytharchive, mythgame, mythmusic & mythweather
         plugin tables.

      2. Existing systems that have up to date DBSchemaVer for
         the above but need a new version to use the unambiguous
         character set. So

     Note that the 'old' DBSchemaVers were changed in 2/2020 to:
         ArchiveDBSchemaVer
         GameDBSchemaVer
         MusicDBSchemaVer
         WeatherDBSchemaVer

     Tested with: MySQL 5.7.30 and 8.0.20, MariaDB 10.3.22 and
     10.4.13.

     Using utf8 is only going to be a temporary solution because
     MySQL v8 issues this warning when doing the ALTER TABLEs in
     the fix:

       Warning | 3719 | 'utf8' is currently an alias for the
       character set UTF8MB3, but will be an alias for UTF8MB4
       in a future release. Please consider using UTF8MB4 in
       order to be unambiguous.

     Modified version of:
 https://forum.mythtv.org/viewtopic.php?p=17769#p17769

     To see current character sets:

     SELECT DEFAULT_CHARACTER_SET_NAME FROM information_schema.SCHEMATA
         WHERE SCHEMA_NAME='mythconverg';

     SELECT TABLE_SCHEMA,TABLE_NAME,TABLE_COLLATION FROM
 INFORMATION_SCHEMA.`TABLES`
         WHERE TABLE_SCHEMA='mythconverg';

     SELECT TABLE_SCHEMA,TABLE_NAME,COLUMN_NAME,CHARACTER_SET_NAME
         FROM INFORMATION_SCHEMA.`COLUMNS`
             WHERE TABLE_SCHEMA='mythconverg' AND CHARACTER_SET_NAME !=
 'utf8';

     master: aa683ba5b99815a1197c3380de6c3d992d4f651e

     v31:    167c8d56e20167a5cc39f1ab8b301313a562b929

     Closes #trac-13577

-- 
Ticket URL: <https://code.mythtv.org/trac/ticket/13577#comment:12>
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