Package org.apache.drill.exec.planner.index

Interface Summary

Interface	Description
FunctionalIndexInfo	FunctionalIndexInfo is to collect Functional fields in IndexDescriptor, derive information needed for index plan, e.g.
IndexCallContext
IndexCollection	Interface used to describe an index collection
IndexDefinition	Top level interface used to define an index.
IndexDescriptor	IndexDefinition + functions to access materialized index(index table/scan, etc)
IndexDiscover
IndexDiscoverable	SchemaFactory of a storage plugin that can used to store index tables should expose this interface to allow IndexDiscovers discovering the index table without adding dependency to the storage plugin.
IndexProperties	IndexProperties encapsulates the various metrics of a single index that are related to the current query.
IndexStatistics
Statistics
StatisticsPayload

Class Summary

Class	Description
AbstractIndexCollection	Abstract base class for Index collection (collection of Index descriptors)
AbstractIndexDescriptor	Abstract base class for an Index descriptor
AbstractIndexStatistics
CollationContext
DrillIndexCollection
DrillIndexDefinition
DrillIndexDescriptor
ExprToRex	Convert a logicalExpression to RexNode, notice the inputRel could be in an old plan, but newRowType is the newly built rowType that the new RexNode will be applied upon, so when reference fields, use newRowType, when need cluster, plannerSetting, etc, use old inputRel
FindFiltersForCollation	A visitor class that analyzes a filter condition (typically an index condition) and a supplied input collation and determines what the output collation would be after applying the filter.
FunctionalIndexHelper
IndexableExprMarker	The filter expressions that could be indexed Other than SchemaPaths, which represent columns of a table and could be indexed, we consider only function expressions, and specifically, CAST function.
IndexConditionInfo
IndexConditionInfo.Builder
IndexDiscoverBase	IndexDiscoverBase is the layer to read index configurations of tables on storage plugins, then based on the properties it collected, get the StoragePlugin from StoragePluginRegistry, together with indexes information, build an IndexCollection
IndexDiscoverFactory	With this factory, we allow user to load a different indexDiscover class to obtain index information
IndexGroup	Encapsulates one or more IndexProperties representing (non)covering or intersecting indexes.
IndexLogicalPlanCallContext
IndexPhysicalPlanCallContext
IndexPlanUtils
IndexSelector
IndexSelector.DrillIndexProperties	IndexProperties encapsulates the various metrics of a single index that are related to the current query.
IndexSelector.IndexComparator
PathInExpr	Class PathInExpr is to recursively analyze a expression trees with a map of indexed expression collected from indexDescriptor, e.g.
RexSeparator
RexToExpression	This class is an enhanced version for DrillOptiq, 1, it can convert expressions in one more layer(project that have expression) above project-scan, while DrillOptiq can only convert expressions directly reference scan's row type, 2, it can record the generated LogicalExpression of each rexNode in the rexNode tree for future reference this result can serve future rewrite that need to locate particular LogicalExpressions
RexToExpression.RexToDrillExt
SimpleRexRemap	Rewrite RexNode with these policies: 1) field renamed.
SimpleRexRemap.FieldsMarker	This class go through the RexNode, collect all the fieldNames, mark starting positions(RexNode) of fields so this information can be used later e,.g.
SimpleRexRemap.RexReplace

Enum Summary

Enum	Description
IndexCollection.IndexCollectionType	Types of an index collections: NATIVE_SECONDARY_INDEX_COLLECTION, EXTERNAL_SECONDARY_INDEX_COLLECTION
IndexDefinition.IndexType	Types of an index: PRIMARY_KEY_INDEX, NATIVE_SECONDARY_INDEX, EXTERNAL_SECONDARY_INDEX
IndexPlanUtils.ConditionIndexed

Exception Summary

Exception	Description
InvalidIndexDefinitionException	An InvalidIndexDefinitionException may be thrown if Drill does not recognize the type or expression of the index during the index discovery phase