• Connection pool management adjustments
  • Improved connection reuse during concurrent queries for schema introspection
  • Go 1.15's DB.SetConnMaxIdleTime is now used to ensure that idle connections aren't reused beyond the session wait_timeout
  • Max connection reuse lifetime increased to 60s (previously was 30s, or lower depending on wait_timeout)
• Several module dependencies have been updated to their latest versions

• MariaDB 10.6 support, including its IGNORED indexes feature (similar to MySQL 8's INVISIBLE indexes)
• Work-around for MariaDB information_schema truncating check_constraints.check_clause at 64 bytes in MariaDB releases prior to Feb 2021
• Two new DockerizedInstance methods for more flexible execution of raw SQL from a string or io.Reader
• Bug fix when diff'ing non-InnoDB tables: previously the StrictIndexOrder statement modifier was inadvertently always enabled for any non-InnoDB table with a PK

• MySQL 8.0.24: Fix diff support for tables with utf8mb3 default charset
• DockerizedInstance.Start: re-inspect the container up to 5 times if the port mapping hasn't shown up yet
• Instance.DropTablesInSchema: Fix error return for non-deadlocks; explicitly skip views which are present in information_schema.partitions in MySQL 8
• BulkDropOptions: new Schema field can be supplied to skip some I_S queries, improving performance
• NormalizeCreateOptions: no longer removes redundant MySQL 8 charset and collation fields from columns in SHOW CREATE TABLE; this is now handled elsewhere since it isn't InnoDB-specific
• Dependency updates relating to MySQL driver, Docker, etc

• Support check constraints
• Support invisible columns in MySQL 8.0.23+
• Connection pool handling refactor
  • Instance.Connect is now deprecated in favor of using either Instance.ConnectionPool or Instance.CachedConnectionPool
  • New method Instance.Valid is like a memoizing version of Instance.CanConnect
  • Connection pools have max connections throttled automatically based on server-side limits
  • Mutex locking mechanics have changed
• Server-side session variable defaults that are incompatible with introspection are now avoided automatically
• Use newer go-sql-driver/mysql to set multiple session variables in one round-trip
• information_schema SELECTs now use SQL_BUFFER_RESULT to reduce locking time
• DropTablesInSchema now executes DROPs sequentially (no concurrency) in large buffer pool situations pre-8.0.23
• Performance improvements
• Bug fix for some default column expression edge cases in MySQL 8
• Bug fix for int display widths in tables created in pre-8.0.19 releases of MySQL 8 that were later upgraded to 8.0.19+
• Bug fix for Instance.ForceFlavor setting patch version properly

As this package is still pre-1.0, some minor backwards-incompatible changes have been introduced:

• Instance mutex field is no longer exported. This was only exported previously as an inadvertent side-effect of being an embedded field.
• Index.OnlyVisibilityDiffers method removed. This is no longer used and is achievable through simpler means.
• Instance.StrictModeCompliant method removed. No longer used; overly complex and not sufficiently thorough.
• Flavor.HasInnoFileFormat method removed. Was only present previously to support Instance.StrictModeCompliant.
• Flavor.InnoRowFormatReqs method removed. Was only present previously to support Instance.StrictModeCompliant.

• UNIQUE indexes: don't consider two of them to be redundant unless they're exactly identical
• FULLTEXT indexes: when adding multiple at once, split into separate ALTERs

• DockerizedInstance: avoid leaking file descriptors upon sourcing a .sql file, or stopping or destroying a container

• Add MariaDB 10.5 to list of officially supported flavors
• New MariaDB 10.5 BINLOG ADMIN privilege now detected by Instance.CanSkipBinlog()
• Column alterations between the binary(16) type and MariaDB 10.5's new inet6 type are always considered safe
• Fix handling of MariaDB 10.3+ column compression, and unify struct field with Percona Server column compression

This release fixes a bug in Instance.CanSkipBinlog for connections with non-super users.

Please note the default git branch has changed to main as of this release, and CI has moved from Travis to GitHub Actions.

• Add support for WITH PARSER clause of FULLTEXT indexes

• Flavor struct, and several related methods, can now optionally account for patch version number
• MySQL 8.0.19: fix diff problems with foreign key ordering; properly handle lack of int display widths
• Add diff support for tables using InnoDB transparent page compression (MySQL 5.7+, Percona Server 5.7+, MariaDB 10.2+)
• Add diff support for tables using column compression (Percona Server 5.6.33+)