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@ -169,7 +169,7 @@ SYSTEM START MERGES [ON VOLUME <volume_name> | [db.]merge_tree_family_table_name
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### STOP TTL MERGES {#query_language-stop-ttl-merges}
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Provides possibility to stop background delete old data according to [TTL expression](../../engines/table-engines/mergetree-family/mergetree.md#table_engine-mergetree-ttl) for tables in the MergeTree family:
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Return `Ok.` even table doesn’t exists or table have not MergeTree engine. Return error when database doesn’t exists:
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Returns `Ok.` even if table doesn’t exist or table has not MergeTree engine. Returns error when database doesn’t exist:
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``` sql
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SYSTEM STOP TTL MERGES [[db.]merge_tree_family_table_name]
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@ -178,7 +178,7 @@ SYSTEM STOP TTL MERGES [[db.]merge_tree_family_table_name]
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### START TTL MERGES {#query_language-start-ttl-merges}
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Provides possibility to start background delete old data according to [TTL expression](../../engines/table-engines/mergetree-family/mergetree.md#table_engine-mergetree-ttl) for tables in the MergeTree family:
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Return `Ok.` even table doesn’t exists. Return error when database doesn’t exists:
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Returns `Ok.` even if table doesn’t exist. Returns error when database doesn’t exist:
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``` sql
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SYSTEM START TTL MERGES [[db.]merge_tree_family_table_name]
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@ -187,7 +187,7 @@ SYSTEM START TTL MERGES [[db.]merge_tree_family_table_name]
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### STOP MOVES {#query_language-stop-moves}
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Provides possibility to stop background move data according to [TTL table expression with TO VOLUME or TO DISK clause](../../engines/table-engines/mergetree-family/mergetree.md#mergetree-table-ttl) for tables in the MergeTree family:
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Return `Ok.` even table doesn’t exists. Return error when database doesn’t exists:
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Returns `Ok.` even if table doesn’t exist. Returns error when database doesn’t exist:
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``` sql
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SYSTEM STOP MOVES [[db.]merge_tree_family_table_name]
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@ -196,7 +196,7 @@ SYSTEM STOP MOVES [[db.]merge_tree_family_table_name]
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### START MOVES {#query_language-start-moves}
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Provides possibility to start background move data according to [TTL table expression with TO VOLUME and TO DISK clause](../../engines/table-engines/mergetree-family/mergetree.md#mergetree-table-ttl) for tables in the MergeTree family:
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Return `Ok.` even table doesn’t exists. Return error when database doesn’t exists:
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Returns `Ok.` even if table doesn’t exist. Returns error when database doesn’t exist:
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``` sql
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SYSTEM STOP MOVES [[db.]merge_tree_family_table_name]
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@ -209,7 +209,7 @@ ClickHouse can manage background replication related processes in [ReplicatedMer
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### STOP FETCHES {#query_language-system-stop-fetches}
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Provides possibility to stop background fetches for inserted parts for tables in the `ReplicatedMergeTree` family:
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Always returns `Ok.` regardless of the table engine and even table or database doesn’t exists.
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Always returns `Ok.` regardless of the table engine and even if table or database doesn’t exist.
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``` sql
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SYSTEM STOP FETCHES [[db.]replicated_merge_tree_family_table_name]
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@ -218,7 +218,7 @@ SYSTEM STOP FETCHES [[db.]replicated_merge_tree_family_table_name]
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### START FETCHES {#query_language-system-start-fetches}
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Provides possibility to start background fetches for inserted parts for tables in the `ReplicatedMergeTree` family:
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Always returns `Ok.` regardless of the table engine and even table or database doesn’t exists.
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Always returns `Ok.` regardless of the table engine and even if table or database doesn’t exist.
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``` sql
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SYSTEM START FETCHES [[db.]replicated_merge_tree_family_table_name]
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@ -280,4 +280,3 @@ SYSTEM RESTART REPLICA [db.]replicated_merge_tree_family_table_name
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### RESTART REPLICAS {#query_language-system-restart-replicas}
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Provides possibility to reinitialize Zookeeper sessions state for all `ReplicatedMergeTree` tables, will compare current state with Zookeeper as source of true and add tasks to Zookeeper queue if needed
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