Package org.apache.druid.sql.calcite.expression

Interface Summary

Interface	Description
AuthorizableOperator	Interface for SqlOperator that need authorization in order to execute.
DruidExpression.DruidExpressionCreator	Create a DruidExpression given some set of input argument sub-expressions
DruidExpression.DruidExpressionShuttle
DruidExpression.ExpressionGenerator	Used by DruidExpression to compile a string which can be parsed into an Expr from given the sub-expression arguments
DruidExpression.VirtualColumnCreator	Used by a DruidExpression to translate itself into a VirtualColumn to add to a native query when referenced by a projection, filter, aggregator, etc.
SqlOperatorConversion

Class Summary

Class	Description
AliasedOperatorConversion
BinaryOperatorConversion
DirectOperatorConversion	Conversion for SQL operators that map 1-1 onto native functions.
DruidExpression	Represents two kinds of expression-like concepts that native Druid queries support: (1) SimpleExtractions, which are direct column access, possibly with an extractionFn (2) native Druid expressions and virtual columns When added to VirtualColumnRegistry whenever used by projections, filters, aggregators, or other query components, these will be converted into native virtual columns using DruidExpression.toVirtualColumn(String, ColumnType, ExprMacroTable) Approximate expression structure is retained in the DruidExpression.arguments, which when fed into the DruidExpression.ExpressionGenerator that all DruidExpression must be created with will produce the final String expression (which will be later parsed into Expr during native processing).
DruidExpression.ExpressionVirtualColumnCreator
DruidExpression.IdentifierExpressionGenerator	Direct reference to a physical or virtual column
DruidExpression.LiteralExpressionGenerator	Builds expressions for a static constant value
Expressions	A collection of functions for translating from Calcite expressions into Druid objects.
ExtractionFns
OperatorConversions	Utilities for assisting in writing SqlOperatorConversion implementations.
OperatorConversions.OperatorBuilder
PostAggregatorVisitor	This class serves as a tracking structure for managing post aggregator column names and any post aggs that are created as part of translation of a Calcite RexNode into native Druid structures.
SimpleExtraction	Represents a "simple" extraction of a value from a Druid row, which is defined as a column plus an optional extractionFn.
TimeUnits
UnaryFunctionOperatorConversion
UnaryPrefixOperatorConversion
UnarySuffixOperatorConversion

Enum Summary

Enum	Description
DruidExpression.NodeType