Package io.deephaven.engine.table.impl

Interface PushdownPredicateManager

All Superinterfaces:

PushdownFilterMatcher

All Known Implementing Classes:

DataIndexPushdownManager, RegionedColumnSourceManager, UnionSourceManager

public interface PushdownPredicateManager
extends PushdownFilterMatcher

Method Summary

Static Methods

Modifier and Type	Method	Description
static @NotNull Map<String,String>	computeRenameMap(List<ColumnSource<?>> columnSources, List<String> filterColumns, IdentityHashMap<ColumnSource<?>,String> columnSourceToName)	Generate a map of the column names as represented in the filter to the column names as represented in an underlying table.
static PushdownPredicateManager	getSharedPPM(Collection<ColumnSource<?>> columnSources)	Return the shared pushdown predicate manager for the given column sources, if one exists.

Methods inherited from interface io.deephaven.engine.table.impl.PushdownFilterMatcher

estimatePushdownFilterCost, makePushdownFilterContext, pushdownFilter

Method Details

getSharedPPM

static PushdownPredicateManager getSharedPPM(Collection<ColumnSource<?>> columnSources)

Return the shared pushdown predicate manager for the given column sources, if one exists. Otherwise, return null.

Parameters:

columnSources - The column sources to check.

Returns:

The shared pushdown predicate manager, or null if none exists.

computeRenameMap

@NotNull
static @NotNull Map<String,String> computeRenameMap(List<ColumnSource<?>> columnSources,
 List<String> filterColumns,
 IdentityHashMap<ColumnSource<?>,String> columnSourceToName)

Generate a map of the column names as represented in the filter to the column names as represented in an underlying table.

Parameters:

columnSources - the column sources used by the filter

filterColumns - the names used by the filter (parallel with columnSources)

columnSourceToName - an IdentityHashMap from the column sources we manage to their names (as the sources know them)

Returns:

a map of filter column names to table column names, for those columns which renames are necessary