io.druid.sql.calcite.expression

Interface SqlOperatorConversion

All Known Implementing Classes:

AliasedOperatorConversion, BinaryOperatorConversion, BTrimOperatorConversion, CastOperatorConversion, CeilOperatorConversion, DateTruncOperatorConversion, DirectOperatorConversion, ExtractOperatorConversion, FloorOperatorConversion, LookupOperatorConversion, LTrimOperatorConversion, MillisToTimestampOperatorConversion, RegexpExtractOperatorConversion, ReinterpretOperatorConversion, RTrimOperatorConversion, StrposOperatorConversion, SubstringOperatorConversion, TimeArithmeticOperatorConversion, TimeArithmeticOperatorConversion.TimeMinusIntervalOperatorConversion, TimeArithmeticOperatorConversion.TimePlusIntervalOperatorConversion, TimeExtractOperatorConversion, TimeFloorOperatorConversion, TimeFormatOperatorConversion, TimeParseOperatorConversion, TimeShiftOperatorConversion, TimestampToMillisOperatorConversion, TrimOperatorConversion, TruncateOperatorConversion, UnaryPrefixOperatorConversion, UnarySuffixOperatorConversion

public interface SqlOperatorConversion

Method Summary

Modifier and Type	Method and Description
org.apache.calcite.sql.SqlOperator	calciteOperator() Returns the SQL operator corresponding to this function.
DruidExpression	toDruidExpression(PlannerContext plannerContext, RowSignature rowSignature, org.apache.calcite.rex.RexNode rexNode) Translate a Calcite RexNode to a Druid expression.

Method Detail

calciteOperator

org.apache.calcite.sql.SqlOperator calciteOperator()

Returns the SQL operator corresponding to this function. Should be a singleton.

Returns:

operator

toDruidExpression

DruidExpression toDruidExpression(PlannerContext plannerContext,
                                  RowSignature rowSignature,
                                  org.apache.calcite.rex.RexNode rexNode)

Translate a Calcite RexNode to a Druid expression.

Parameters:

plannerContext - SQL planner context

rowSignature - signature of the rows to be extracted from

rexNode - expression meant to be applied on top of the rows

Returns:

Druid expression, or null if translation is not possible

See Also:

Expressions.toDruidExpression(PlannerContext, RowSignature, RexNode)