io.druid.sql.calcite.expression.builtin

Class TimeArithmeticOperatorConversion

java.lang.Object

io.druid.sql.calcite.expression.builtin.TimeArithmeticOperatorConversion

All Implemented Interfaces:

SqlOperatorConversion

Direct Known Subclasses:

TimeArithmeticOperatorConversion.TimeMinusIntervalOperatorConversion, TimeArithmeticOperatorConversion.TimePlusIntervalOperatorConversion

public abstract class TimeArithmeticOperatorConversion
extends Object
implements SqlOperatorConversion

Base class for a number of time arithmetic related operators.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TimeArithmeticOperatorConversion.TimeMinusIntervalOperatorConversion
static class	TimeArithmeticOperatorConversion.TimePlusIntervalOperatorConversion

Constructor Summary

Constructors

Constructor and Description
TimeArithmeticOperatorConversion(org.apache.calcite.sql.SqlOperator operator, int direction)

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.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TimeArithmeticOperatorConversion

public TimeArithmeticOperatorConversion(org.apache.calcite.sql.SqlOperator operator,
                                        int direction)

Method Detail

calciteOperator

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

Description copied from interface: SqlOperatorConversion

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

Specified by:

calciteOperator in interface SqlOperatorConversion

Returns:

operator

toDruidExpression

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

Description copied from interface: SqlOperatorConversion

Translate a Calcite RexNode to a Druid expression.

Specified by:

toDruidExpression in interface SqlOperatorConversion

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)