Remove hardcoded default collation for MySQL tables#1011
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Let MySQL/MariaDB use the database default collation instead of forcing utf8mb4_unicode_ci on every table. This avoids collation mismatches on servers with different defaults (e.g. MariaDB 11.8 uses utf8mb4_uca1400_ai_ci). Users who need a specific collation can still set it explicitly in their migrations. Fixes #1010
Allow configuring a global default collation for MySQL tables via
Configure::read('Migrations.default_collation'). When null (default),
tables inherit the database server collation. Per-table collation
options still take precedence.
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Summary
utf8mb4_unicode_cidefault collation fromMysqlAdapter::createTable()Migrations.default_collationconfig option to allow setting a global default collation for all tablescollationentry in docs and update to reflect the new behaviorThis avoids collation mismatches on servers with different defaults (e.g. MariaDB 11.8 defaults to
utf8mb4_uca1400_ai_ci).Configuration
Per-table
'collation' => '...'options still take precedence over the global config.Fixes #1010