io.druid.sql.calcite.expression.builtin

Class TrimOperatorConversion

java.lang.Object

io.druid.sql.calcite.expression.builtin.TrimOperatorConversion

All Implemented Interfaces:

SqlOperatorConversion

public class TrimOperatorConversion
extends Object
implements SqlOperatorConversion

Constructor Summary

Constructors

Constructor and Description
TrimOperatorConversion()

Method Summary

Modifier and Type	Method and Description
org.apache.calcite.sql.SqlOperator	calciteOperator() Returns the SQL operator corresponding to this function.
static DruidExpression	makeTrimExpression(org.apache.calcite.sql.fun.SqlTrimFunction.Flag trimStyle, DruidExpression stringExpression, DruidExpression charsExpression)
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

TrimOperatorConversion

public TrimOperatorConversion()

Method Detail

makeTrimExpression

@Nullable
public static DruidExpression makeTrimExpression(org.apache.calcite.sql.fun.SqlTrimFunction.Flag trimStyle,
                                                           DruidExpression stringExpression,
                                                           DruidExpression charsExpression)

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)