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update_* session settings

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These settings are available in system.settings and are autogenerated from source.

update_parallel_mode

Type
UpdateParallelMode
Default
auto
Version history
VersionDefault valueComment
25.5autoA new setting

Determines the behavior of concurrent update queries.

Possible values:

  • sync - run sequentially all UPDATE queries.
  • auto - run sequentially only UPDATE queries with dependencies between columns updated in one query and columns used in expressions of another query.
  • async - do not synchronize update queries.

update_sequential_consistency

Type
Bool
Default
1
Version history
VersionDefault valueComment
25.51A new setting

If true set of parts is updated to the latest version before execution of update.

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