Skip to main content

Documentation Index

Fetch the complete documentation index at: https://private-7c7dfe99-page-updates.mintlify.app/llms.txt

Use this file to discover all available pages before exploring further.

​
Description

Contains description of table engines supported by server and their feature support information. This table contains the following columns (the column type is shown in brackets):
  • name (String) — The name of table engine.
  • supports_settings (UInt8) — Flag that indicates if table engine supports SETTINGS clause.
  • supports_skipping_indices (UInt8) — Flag that indicates if table engine supports skipping indices.
  • supports_projections (UInt8) — Flag that indicated if table engine supports projections.
  • supports_sort_order (UInt8) — Flag that indicates if table engine supports clauses PARTITION_BY, PRIMARY_KEY, ORDER_BY and SAMPLE_BY.
  • supports_ttl (UInt8) — Flag that indicates if table engine supports TTL.
  • supports_replication (UInt8) — Flag that indicates if table engine supports data replication.
  • supports_deduplication (UInt8) — Flag that indicates if table engine supports data deduplication.
  • supports_parallel_insert (UInt8) — Flag that indicates if table engine supports parallel insert (see max_insert_threads setting).

​
Example

Query
SELECT *
FROM system.table_engines
WHERE name IN ('Kafka', 'MergeTree', 'ReplicatedCollapsingMergeTree')
Response
┌─name──────────────────────────┬─supports_settings─┬─supports_skipping_indices─┬─supports_sort_order─┬─supports_ttl─┬─supports_replication─┬─supports_deduplication─┬─supports_parallel_insert─┐
│ MergeTree                     │                 1 │                         1 │                   1 │            1 │                    0 │                      0 │                        1 │
│ Kafka                         │                 1 │                         0 │                   0 │            0 │                    0 │                      0 │                        0 │
│ ReplicatedCollapsingMergeTree │                 1 │                         1 │                   1 │            1 │                    1 │                      1 │                        1 │
└───────────────────────────────┴───────────────────┴───────────────────────────┴─────────────────────┴──────────────┴──────────────────────┴────────────────────────┴──────────────────────────┘

​
See also