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DOCAPI-6890: system.parts.is_frozen description.

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BayoNet 2019-06-05 16:32:38 +03:00
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docs/en/operations/system_tables.md
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@ -210,6 +210,8 @@ Formats:
- engine (String) – Name of the table engine without parameters. - engine (String) – Name of the table engine without parameters.
- is_frozen (UInt8) – Flag that shows partition data backup existence. 1, the backup exists. 0, the backup not exist. For more details, see [FREEZE PARTITION](../query_language/alter.md#alter_freeze-partition)
## system.part_log {#system_tables-part-log} ## system.part_log {#system_tables-part-log}
The `system.part_log` table is created only if the [part_log](server_settings/settings.md#server_settings-part-log) server setting is specified. The `system.part_log` table is created only if the [part_log](server_settings/settings.md#server_settings-part-log) server setting is specified.
@ -268,15 +270,15 @@ Contains information about queries execution. For each query, you can see proces
!!! note !!! note
The table doesn't contain input data for `INSERT` queries. The table doesn't contain input data for `INSERT` queries.
ClickHouse creates this table only if the [query_log](server_settings/settings.md#server_settings-query-log) server parameter is specified. This parameter sets the logging rules. For example, a logging interval or name of a table the queries will be logged in. ClickHouse creates this table only if the [query_log](server_settings/settings.md#server_settings-query-log) server parameter is specified. This parameter sets the logging rules. For example, a logging interval or name of a table the queries will be logged in.
To enable query logging, set the parameter [log_queries](settings/settings.md#settings-log-queries) to 1. For details, see the [Settings](settings/settings.md) section. To enable query logging, set the parameter [log_queries](settings/settings.md#settings-log-queries) to 1. For details, see the [Settings](settings/settings.md) section.
The `system.query_log` table registers two kinds of queries: The `system.query_log` table registers two kinds of queries:
1. Initial queries, that were run directly by the client. 1. Initial queries, that were run directly by the client.
2. Child queries that were initiated by other queries (for distributed query execution). For such a kind of queries, information about the parent queries is shown in the `initial_*` columns. 2. Child queries that were initiated by other queries (for distributed query execution). For such a kind of queries, information about the parent queries is shown in the `initial_*` columns.
Columns: Columns:
@ -284,22 +286,22 @@ Columns:
- 1 — Successful start of query execution. - 1 — Successful start of query execution.
- 2 — Successful end of query execution. - 2 — Successful end of query execution.
- 3 — Exception before the start of query execution. - 3 — Exception before the start of query execution.
- 4 — Exception during the query execution. - 4 — Exception during the query execution.
- `event_date` (Date) — Event date. - `event_date` (Date) — Event date.
- `event_time` (DateTime) — Event time. - `event_time` (DateTime) — Event time.
- `query_start_time` (DateTime) — Time of the query processing start. - `query_start_time` (DateTime) — Time of the query processing start.
- `query_duration_ms` (UInt64) — Duration of the query processing. - `query_duration_ms` (UInt64) — Duration of the query processing.
- `read_rows` (UInt64) — Number of read rows. - `read_rows` (UInt64) — Number of read rows.
- `read_bytes` (UInt64) — Number of read bytes. - `read_bytes` (UInt64) — Number of read bytes.
- `written_rows` (UInt64) — For `INSERT` queries, number of written rows. For other queries, the column value is 0. - `written_rows` (UInt64) — For `INSERT` queries, number of written rows. For other queries, the column value is 0.
- `written_bytes` (UInt64) — For `INSERT` queries, number of written bytes. For other queries, the column value is 0. - `written_bytes` (UInt64) — For `INSERT` queries, number of written bytes. For other queries, the column value is 0.
- `result_rows` (UInt64) — Number of rows in a result. - `result_rows` (UInt64) — Number of rows in a result.
- `result_bytes` (UInt64) — Number of bytes in a result. - `result_bytes` (UInt64) — Number of bytes in a result.
- `memory_usage` (UInt64) — Memory consumption by the query. - `memory_usage` (UInt64) — Memory consumption by the query.
- `query` (String) — Query string. - `query` (String) — Query string.
- `exception` (String) — Exception message. - `exception` (String) — Exception message.
- `stack_trace` (String) — Stack trace (a list of methods called before the error occurred). An empty string, if the query is completed successfully. - `stack_trace` (String) — Stack trace (a list of methods called before the error occurred). An empty string, if the query is completed successfully.
- `is_initial_query` (UInt8) — Kind of query. Possible values: - `is_initial_query` (UInt8) — Kind of query. Possible values:
- 1 — Query was initiated by the client. - 1 — Query was initiated by the client.
- 0 — Query was initiated by another query for distributed query execution. - 0 — Query was initiated by another query for distributed query execution.
- `user` (String) — Name of the user initiated the current query. - `user` (String) — Name of the user initiated the current query.
@ -321,7 +323,7 @@ Columns:
- `client_version_minor` (UInt32) — Minor version of the [clickhouse-client](../interfaces/cli.md). - `client_version_minor` (UInt32) — Minor version of the [clickhouse-client](../interfaces/cli.md).
- `client_version_patch` (UInt32) — Patch component of the [clickhouse-client](../interfaces/cli.md) version. - `client_version_patch` (UInt32) — Patch component of the [clickhouse-client](../interfaces/cli.md) version.
- `http_method` (UInt8) — HTTP method initiated the query. Possible values: - `http_method` (UInt8) — HTTP method initiated the query. Possible values:
- 0 — The query was launched from the TCP interface. - 0 — The query was launched from the TCP interface.
- 1 — `GET` method is used. - 1 — `GET` method is used.
- 2 — `POST` method is used. - 2 — `POST` method is used.
- `http_user_agent` (String) — The `UserAgent` header passed in the HTTP request. - `http_user_agent` (String) — The `UserAgent` header passed in the HTTP request.
@ -518,13 +520,13 @@ This table contains the following columns (the type of the corresponding column
- `engine` (String) — Table engine name (without parameters). - `engine` (String) — Table engine name (without parameters).
- `is_temporary` (UInt8) - Flag that indicates whether the table is temporary. - `is_temporary` (UInt8) - Flag that indicates whether the table is temporary.
- `data_path` (String) - Path to the table data in the file system. - `data_path` (String) - Path to the table data in the file system.
- `metadata_path` (String) - Path to the table metadata in the file system. - `metadata_path` (String) - Path to the table metadata in the file system.
- `metadata_modification_time` (DateTime) - Time of latest modification of the table metadata. - `metadata_modification_time` (DateTime) - Time of latest modification of the table metadata.
- `dependencies_database` (Array(String)) - Database dependencies. - `dependencies_database` (Array(String)) - Database dependencies.
- `dependencies_table` (Array(String)) - Table dependencies ([MaterializedView](table_engines/materializedview.md) tables based on the current table). - `dependencies_table` (Array(String)) - Table dependencies ([MaterializedView](table_engines/materializedview.md) tables based on the current table).
- `create_table_query` (String) - The query that was used to create the table. - `create_table_query` (String) - The query that was used to create the table.
- `engine_full` (String) - Parameters of the table engine. - `engine_full` (String) - Parameters of the table engine.
- `partition_key` (String) - The partition key expression specified in the table. - `partition_key` (String) - The partition key expression specified in the table.
- `sorting_key` (String) - The sorting key expression specified in the table. - `sorting_key` (String) - The sorting key expression specified in the table.
- `primary_key` (String) - The primary key expression specified in the table. - `primary_key` (String) - The primary key expression specified in the table.
- `sampling_key` (String) - The sampling key expression specified in the table. - `sampling_key` (String) - The sampling key expression specified in the table.