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

optimize_use_implicit_projections

Automatically choose implicit projections to perform SELECT query

optimize_use_projection_filtering

Enables using projections to filter part ranges even when projections are not selected to perform SELECT query.

optimize_use_projections

Aliases: allow_experimental_projection_optimization Enables or disables projection optimization when processing SELECT queries. Possible values:
  • 0 — Projection optimization disabled.
  • 1 — Projection optimization enabled.
Last modified on July 23, 2026