table_properties
Overviewβ
Used to view the properties of tables (including internal and external tables).
tip
This system table is supported from versions 2.1.6 and 3.0.2.
Databaseβ
information_schema
Table Informationβ
| Column Name | Type | Description |
|---|---|---|
| TABLE_CATALOG | VARCHAR(64) | Catalog to which the table belongs |
| TABLE_SCHEMA | VARCHAR(64) | Database to which the table belongs |
| TABLE_NAME | VARCHAR(64) | Name of the table |
| PROPERTY_NAME | STRING | Name of the property |
| PROPERTY_VALUE | STRING | Value of the property |
tip
For specific details on table properties, refer to the Create Table documentation.
Examplesβ
Query all table properties
mysql> select * from information_schema.table_properties;
+---------------+---------------+----------------------+------------------------------------------------+-------------------------+
| TABLE_CATALOG | TABLE_SCHEMA | TABLE_NAME | PROPERTY_NAME | PROPERTY_VALUE |
+---------------+---------------+----------------------+------------------------------------------------+-------------------------+
...
| internal | test_database | test_table | min_load_replica_num | -1 |
| internal | test_database | test_table | data_sort.col_num | 3 |
| internal | test_database | test_table | group_commit_interval_ms | 10000 |
| internal | test_database | test_table | data_sort.sort_type | LEXICAL |
| internal | test_database | test_table | is_being_synced | false |
| internal | test_database | test_table | binlog.enable | false |
| internal | test_database | test_table | enable_mow_light_delete | false |
| internal | test_database | test_table | binlog.ttl_seconds | 86400 |
| internal | test_database | test_table | inverted_index_storage_format | V2 |
| internal | test_database | test_table | time_series_compaction_empty_rowsets_threshold | 5 |
| internal | test_database | test_table | default.replication_allocation | tag.location.default: 1 |
| internal | test_database | test_table | time_series_compaction_level_threshold | 1 |
| internal | test_database | test_table | time_series_compaction_time_threshold_seconds | 3600 |
| internal | test_database | test_table | storage_format | V2 |
| internal | test_database | test_table | store_row_column | false |
| internal | test_database | test_table | light_schema_change | true |
| internal | test_database | test_table | enable_unique_key_merge_on_write | false |
| internal | test_database | test_table | in_memory | false |
| internal | test_database | test_table | file_cache_ttl_seconds | 0 |
| internal | test_database | test_table | group_commit_data_bytes | 134217728 |
| internal | test_database | test_table | compaction_policy | size_based |
| internal | test_database | test_table | _auto_bucket | false |
| internal | test_database | test_table | binlog.max_history_nums | 9223372036854775807 |
| internal | test_database | test_table | time_series_compaction_file_count_threshold | 2000 |
| internal | test_database | test_table | skip_write_index_on_load | false |
| internal | test_database | test_table | disable_auto_compaction | false |
| internal | test_database | test_table | row_store_page_size | 16384 |
| internal | test_database | test_table | time_series_compaction_goal_size_mbytes | 1024 |
| internal | test_database | test_table | storage_medium | HDD |
| internal | test_database | test_table | enable_single_replica_compaction | false |
| internal | test_database | test_table | compression | LZ4F |
| internal | test_database | test_table | binlog.max_bytes | 9223372036854775807 |
+---------------+---------------+----------------------+------------------------------------------------+-------------------------+Query the default replication number
mysql> select * from information_schema.table_properties where PROPERTY_NAME="default.replication_allocation";
+---------------+----------------------+----------------------+--------------------------------+-------------------------+
| TABLE_CATALOG | TABLE_SCHEMA | TABLE_NAME | PROPERTY_NAME | PROPERTY_VALUE |
+---------------+----------------------+----------------------+--------------------------------+-------------------------+
| internal | __internal_schema | column_statistics | default.replication_allocation | tag.location.default: 1 |
| internal | __internal_schema | partition_statistics | default.replication_allocation | tag.location.default: 1 |
| internal | __internal_schema | audit_log | default.replication_allocation | tag.location.default: 1 |
| internal | test_database | test_table | default.replication_allocation | tag.location.default: 1 |
+---------------+----------------------+----------------------+--------------------------------+-------------------------+
