PushDownUtils¶

pruneColumns¶

pruneColumns(
  scanBuilder: ScanBuilder,
  relation: DataSourceV2Relation,
  projects: Seq[NamedExpression],
  filters: Seq[Expression]): (Scan, Seq[AttributeReference])

pruneColumns...FIXME

pruneColumns is used when:

• GroupBasedRowLevelOperationScanPlanning logical optimization is executed (to transform ReplaceData logical operators over DataSourceV2Relations)
• V2ScanRelationPushDown logical optimization is executed (to pruneColumns of ScanBuilderHolders)

pushFilters¶

pushFilters(
  scanBuilder: ScanBuilder,
  filters: Seq[Expression]): (Either[Seq[sources.Filter], Seq[Predicate]], Seq[Expression])

pushFilters...FIXME

pushFilters is used when:

• GroupBasedRowLevelOperationScanPlanning logical optimization is executed (to pushFilters)
• V2ScanRelationPushDown logical optimization is executed (to pushDownFilters to ScanBuilderHolders)