MySQL 8.0.29
Source Code Documentation
pfs_dd_version.h File Reference

Performance schema data dictionary version. More...

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Variables

static const uint PFS_DD_VERSION = 80029
 The version of the current performance_schema database schema. More...
 

Detailed Description

Performance schema data dictionary version.

Variable Documentation

◆ PFS_DD_VERSION

const uint PFS_DD_VERSION = 80029
static

The version of the current performance_schema database schema.

Version numbering forms a name space, which needs to be unique across all MySQL versions, even including forks.

This version number is stored on disk in the data dictionary. Every time the performance_schema structure changes, this version number must change.

Do not use a naive 1, 2, 3, ... N numbering scheme, as it requires an authoritative registry to assign numbers. This can not work in a distributed development environment, even less with forks, patches and back ports done by third parties.

The numbering to use is the MySQL version number of the first MySQL version that published a given database schema. The format is Mmmdd with M=Major, m=minor, d=dot, so that MySQL 8.0.4 is encoded as 80004.

In case of -dash version numbers, encode MySQL 8.12.34-56 as 8123456.

Historical version number published in the data dictionary:

1:

Introduced in MySQL 8.0.3 by WL#7900. Never published in a GA version, abandoned.

80004:

performance_schema tables changed in MySQL 8.0.4 are

  • setup_threads (created)
  • setup_instruments (modified)
  • variables_info (modified)
  • setup_timers (removed)
  • metadata_locks (modified, added column COLUMN_NAME)
  • replication_connection_configuration (modified)
  • instance_log_resource (created)

80005:

performance_schema tables changed in MySQL 8.0.5 are

  • all, changed UTF8 (aka UTF8MB3) to UTF8MB4.

80006:

performance_schema tables changed in MySQL 8.0.6 are

  • variables_info.set_time precision changed from 0 to 6.

80011:

Version bump from 8.0.6 to 8.0.11, versions [8.0.5 - 8.0.10] inclusive are abandoned. performance_schema tables changed in MySQL 8.0.11 are

  • instance_log_resource was renamed to log_resource.

80014:

performance_schema tables changed in MySQL 8.0.14 are

  • events_statements_current, added column QUERY_ID
  • events_statements_history, added column QUERY_ID
  • events_statements_history_long, added column QUERY_ID

80015:

performance_schema.keyring_keys

80017: – WARNING, EXPOSED BY MySQL 8.0.16 –

Unfortunately, MySQL 8.0.16 claim the 80017 tag, due to a bad merge. performance_schema tables changed in MySQL 8.0.16

  • replication_connection_configuration, added column NETWORK_NAMESPACE

800171: – WARNING, EXPOSED BY MySQL 8.0.17 –

IMPORTANT NOTE: The release 8.0.16 made use of version 80017 incorrectly, which makes the upgrade from 8.0.16 to 8.0.17 release immutable. This was introduced by WL#12720.

In order to allow upgrade from 8.0.16 to 8.0.17, we choose the new version number as 800171 for 8.0.17 release. Going forward the release 8.0.18 would use 80018.

Note that, any comparison between two PFS version numbers should be

carefully done.

performance_schema tables changed in MySQL 8.0.17

  • WL#12571 increases the HOST name length from 60 to 255.

80018:

performance_schema tables changed in MySQL 8.0.18

  • replication_connection_configuration, added column MASTER_COMPRESSION_ALGORITHMS, MASTER_COMPRESSION_LEVEL
  • replication_applier_configuration, added column PRIVILEGE_CHECKS_USER

80019:

performance_schema tables changed in MySQL 8.0.19

  • replication_connection_configuration, added column TLS_CIPHERSUITES
  • replication_applier_configuration, added column REQUIRE_ROW_FORMAT

80020:

performance_schema tables changed in MySQL 8.0.20

  • WL#3549 created binary_log_transaction_compression_stats
  • replication_applier_configuration, added column REQUIRE_TABLE_PRIMARY_KEY_CHECK

80021:

performance_schema tables changed in MySQL 8.0.21

  • tls_channel_status (created)
  • replication_connection_configuration, added column SOURCE_CONNECTION_AUTO_FAILOVER

80022:

performance_schema tables changed in MySQL 8.0.22

  • WL#9090 created processlist
  • WL#13681 created error_log

80023:

performance_schema tables changed in MySQL 8.0.23

  • WL#12819 replication_applier_configuration, added column ASSIGN_GTIDS_TO_ANONYMOUS_TRANSACTIONS_TYPE ASSIGN_GTIDS_TO_ANONYMOUS_TRANSACTIONS_VALUE
  • performance_schema.replication_asynchronous_connection_failover, added column MANAGED_NAME
  • added table performance_schema.replication_asynchronous_connection_failover_managed

80024:

performance_schema tables changed in MySQL 8.0.24

  • WL#13446 added performance_schema.keyring_component_status

80027:

performance_schema tables changed in MySQL 8.0.27

  • WL#9852 added replication_group_members column MEMBER_COMMUNICATION_PROTOCOL_STACK
  • Bug#32701593:'SELECT FROM PS.REPLICATION_ASYNCHRONOUS_CONNECTION_FAILOVER' DIDN'T RETURN A RE
  • WL#7491 added the column to replication_connection_configuration the column GTID_ONLY
  • BUG#104643 Defaults in performance schema tables incompatible with sql_mode fixed TIMESTAMP columns (removed default 0) fixed DOUBLE columns (removed sign)

80028:

performance_schema tables changed in MySQL 8.0.28

  • WL#14779 PERFORMANCE_SCHEMA, ADD CPU TIME TO STATEMENT METRICS added CPU_TIME, SUM_CPU_TIME columns.
  • Fixed performance_schema.processlist host column to size 261.

80029:

performance_schema tables changed in MySQL 8.0.29

  • WL#14346 PERFORMANCE_SCHEMA, SECONDARY_ENGINE STATS Added columns EXECUTION_ENGINE, COUNT_SECONDARY
  • Bug #30624990 NO UTF8MB3 IN INFORMATION_SCHEMA.CHARACTER_SETS Use 'utf8mb3' rather than 'utf8' alias for for character set names.