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datafusion::optimizer::optimize_projections - Rust
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Module datafusion::optimizer::optimize_projections

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Optimizer rule to prune unnecessary columns from intermediate schemas inside the LogicalPlan. This rule:

  • Removes unnecessary columns that do not appear at the output and/or are not used during any computation step.
  • Adds projections to decrease table column size before operators that benefit from a smaller memory footprint at its input.
  • Removes unnecessary LogicalPlan::Projections from the LogicalPlan.

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