Comment on page

MySQL Information Schema

The MySQL information_schema database provides access to a variety of database metadata useful for inspecting your database and also used by database tooling. Dolt provides a subset of the data available in information_schema, as described below. In general, all tables from MySQL's information_schema exist, with the correct schema, but not all data is populated. If you need support for information_schema metadata that is available in MySQL, but not yet available in Dolt, please open a GitHub issue to let us know what you need.
Core Metadata Tables
Table
Supported
Notes and limitations
​ADMINISTRABLE_ROLE_AUTHORIZATIONS​
❌
​
​APPLICABLE_ROLES​
❌
​
​CHARACTER_SETS​
✅
​
​CHECK_CONSTRAINTS​
✅
​
​COLLATION_CHARACTER_SET_APPLICABILITY​
✅
​
​COLLATIONS​
✅
​
​COLUMN_PRIVILEGES​
🟠
Dolt does not mysql.columns_priv table yet.
​COLUMN_STATISTICS​
🟠️
histogram column shows only buckets key values.
​COLUMNS​
🟠️
View columns are not included (GitHub Issue).
​COLUMNS_EXTENSIONS​
✅
Reserved in MySQL for future use.
​ENABLED_ROLES​
❌
​
​ENGINES​
✅
Only the InnoDB engine is supported.
​EVENTS​
❌
Not supported in Dolt.
​FILES​
❌
Not supported in Dolt.
​KEY_COLUMN_USAGE​
✅
​
​KEYWORDS​
✅
​
​ndb_transid_mysql_connection_map​
❌
Not supported in Dolt.
​OPTIMIZER_TRACE​
❌
Not supported in Dolt.
​PARAMETERS​
✅
Dolt does not support stored functions yet.
​PARTITIONS​
❌
Not supported in Dolt.
​PLUGINS​
❌️
Not supported in Dolt.
​PROCESSLIST​
🟠️
status column missing some cases.
​PROFILING​
❌
Not supported in Dolt.
​REFERENTIAL_CONSTRAINTS​
✅
​
​RESOURCE_GROUPS​
❌
Not supported in Dolt.
​ROLE_COLUMN_GRANTS​
🟠
Dolt does not mysql.columns_priv table yet.
​ROLE_ROUTINE_GRANTS​
❌
​
​ROLE_TABLE_GRANTS​
❌
​
​ROUTINES​
🟠️
Dolt does not support stored functions yet.
​SCHEMA_PRIVILEGES​
✅
​
​SCHEMATA​
✅
​
​SCHEMATA_EXTENSIONS​
✅
​
​ST_GEOMETRY_COLUMNS​
✅
​
​ST_SPATIAL_REFERENCE_SYSTEMS​
✅
​
​ST_UNITS_OF_MEASURE​
✅
​
​STATISTICS​
🟠
cardinality column is not populated (GitHub Issue).
​TABLE_CONSTRAINTS​
✅
​
​TABLE_CONSTRAINTS_EXTENSIONS​
✅
​
​TABLE_PRIVILEGES​
✅
​
​TABLES​
🟠️
Some columns are not populated (GitHub Issue).
​TABLES_EXTENSIONS​
✅
Reserved in MySQL for future use.
​TABLESPACES_EXTENSIONS​
❌
Reserved in MySQL for future use.
​TRIGGERS​
✅
​
​USER_ATTRIBUTES​
🟠
attributes column is not populated (GitHub Issue).
​USER_PRIVILEGES​
✅
​
​VIEW_ROUTINE_USAGE​
❌
​
​VIEW_TABLE_USAGE​
❌
​
​VIEWS​
🟠
view_definition does not match MySQL (GitHub Issue).
InnoDB Tables
MySQL's information_schema also provides tables specific to the use of the InnoDB storage engine. These tables are provided in Dolt to avoid issues with MySQL tools that read from these tables, however since Dolt uses its own storage engine, no data is populated in these tables.
Table
Supported
Notes and limitations
​INNODB_BUFFER_PAGE​
❌
​
​INNODB_BUFFER_PAGE_LRU​
❌
​
​INNODB_BUFFER_POOL_STATS​
❌
​
​INNODB_CACHED_INDEXES​
❌
​
​INNODB_CMP​
❌
​
​INNODB_CMP_PER_INDEX​
❌
​
​INNODB_CMP_PER_INDEX_RESET​
❌
​
​INNODB_CMP_RESET​
❌
​
​INNODB_CMPMEM​
❌
​
​INNODB_CMPMEM_RESET​
❌
​
​INNODB_COLUMNS​
❌
​
​INNODB_DATAFILES​
❌
​
​INNODB_FIELDS​
❌
​
​INNODB_FOREIGN​
❌
​
​INNODB_FOREIGN_COLS​
❌
​
​INNODB_FT_BEING_DELETED​
❌
​
​INNODB_FT_CONFIG​
❌
​
​INNODB_FT_DEFAULT_STOPWORD​
❌
​
​INNODB_FT_DELETED​
❌
​
​INNODB_FT_INDEX_CACHE​
❌
​
​INNODB_FT_INDEX_TABLE​
❌
​
​INNODB_INDEXES​
❌
​
​INNODB_METRICS​
❌
​
​INNODB_SESSION_TEMP_TABLESPACES​
❌
​
​INNODB_TABLES​
❌
​
​INNODB_TABLESPACES​
❌
​
​INNODB_TABLESPACES_BRIEF​
❌
​
​INNODB_TABLESTATS​
❌
​
​INNODB_TEMP_TABLE_INFO​
❌
​
​INNODB_TRX​
❌
​
​INNODB_VIRTUAL​
❌
​

Table	Supported	Notes and limitations
ADMINISTRABLE_ROLE_AUTHORIZATIONS	❌
APPLICABLE_ROLES	❌
CHARACTER_SETS	✅
CHECK_CONSTRAINTS	✅
COLLATION_CHARACTER_SET_APPLICABILITY	✅
COLLATIONS	✅
COLUMN_PRIVILEGES	🟠	Dolt does not `mysql.columns_priv` table yet.
COLUMN_STATISTICS	🟠️	`histogram` column shows only `buckets` key values.
COLUMNS	🟠️	View columns are not included (GitHub Issue).
COLUMNS_EXTENSIONS	✅	Reserved in MySQL for future use.
ENABLED_ROLES	❌
ENGINES	✅	Only the `InnoDB` engine is supported.
EVENTS	❌	Not supported in Dolt.
FILES	❌	Not supported in Dolt.
KEY_COLUMN_USAGE	✅
KEYWORDS	✅
ndb_transid_mysql_connection_map	❌	Not supported in Dolt.
OPTIMIZER_TRACE	❌	Not supported in Dolt.
PARAMETERS	✅	Dolt does not support stored functions yet.
PARTITIONS	❌	Not supported in Dolt.
PLUGINS	❌️	Not supported in Dolt.
PROCESSLIST	🟠️	`status` column missing some cases.
PROFILING	❌	Not supported in Dolt.
REFERENTIAL_CONSTRAINTS	✅
RESOURCE_GROUPS	❌	Not supported in Dolt.
ROLE_COLUMN_GRANTS	🟠	Dolt does not `mysql.columns_priv` table yet.
ROLE_ROUTINE_GRANTS	❌
ROLE_TABLE_GRANTS	❌
ROUTINES	🟠️	Dolt does not support stored functions yet.
SCHEMA_PRIVILEGES	✅
SCHEMATA	✅
SCHEMATA_EXTENSIONS	✅
ST_GEOMETRY_COLUMNS	✅
ST_SPATIAL_REFERENCE_SYSTEMS	✅
ST_UNITS_OF_MEASURE	✅
STATISTICS	🟠	`cardinality` column is not populated (GitHub Issue).
TABLE_CONSTRAINTS	✅
TABLE_CONSTRAINTS_EXTENSIONS	✅
TABLE_PRIVILEGES	✅
TABLES	🟠️	Some columns are not populated (GitHub Issue).
TABLES_EXTENSIONS	✅	Reserved in MySQL for future use.
TABLESPACES_EXTENSIONS	❌	Reserved in MySQL for future use.
TRIGGERS	✅
USER_ATTRIBUTES	🟠	`attributes` column is not populated (GitHub Issue).
USER_PRIVILEGES	✅
VIEW_ROUTINE_USAGE	❌
VIEW_TABLE_USAGE	❌
VIEWS	🟠	`view_definition` does not match MySQL (GitHub Issue).

Table	Supported	Notes and limitations
INNODB_BUFFER_PAGE	❌
INNODB_BUFFER_PAGE_LRU	❌
INNODB_BUFFER_POOL_STATS	❌
INNODB_CACHED_INDEXES	❌
INNODB_CMP	❌
INNODB_CMP_PER_INDEX	❌
INNODB_CMP_PER_INDEX_RESET	❌
INNODB_CMP_RESET	❌
INNODB_CMPMEM	❌
INNODB_CMPMEM_RESET	❌
INNODB_COLUMNS	❌
INNODB_DATAFILES	❌
INNODB_FIELDS	❌
INNODB_FOREIGN	❌
INNODB_FOREIGN_COLS	❌
INNODB_FT_BEING_DELETED	❌
INNODB_FT_CONFIG	❌
INNODB_FT_DEFAULT_STOPWORD	❌
INNODB_FT_DELETED	❌
INNODB_FT_INDEX_CACHE	❌
INNODB_FT_INDEX_TABLE	❌
INNODB_INDEXES	❌
INNODB_METRICS	❌
INNODB_SESSION_TEMP_TABLESPACES	❌
INNODB_TABLES	❌
INNODB_TABLESPACES	❌
INNODB_TABLESPACES_BRIEF	❌
INNODB_TABLESTATS	❌
INNODB_TEMP_TABLE_INFO	❌
INNODB_TRX	❌
INNODB_VIRTUAL	❌

Supported Statements

Miscellaneous

Last modified 7mo ago