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

Class DirectOperatorConversion

java.lang.Object

org.apache.druid.sql.calcite.expression.DirectOperatorConversion

All Implemented Interfaces:

SqlOperatorConversion

Direct Known Subclasses:

ArrayAppendOperatorConversion, ArrayConcatOperatorConversion, ArrayConstructorOperatorConversion, ArrayLengthOperatorConversion, ArrayOffsetOfOperatorConversion, ArrayOffsetOperatorConversion, ArrayOrdinalOfOperatorConversion, ArrayOrdinalOperatorConversion, ArrayPrependOperatorConversion, ArrayQuantileOperatorConversion, ArraySliceOperatorConversion, ArrayToMultiValueStringOperatorConversion, ArrayToStringOperatorConversion, BaseExpressionDimFilterOperatorConversion, ConcatOperatorConversion, ContainsOperatorConversion, DecodeBase64UTFOperatorConversion, DivOperatorConversion, GreatestOperatorConversion, IPv4AddressMatchOperatorConversion, IPv4AddressParseOperatorConversion, IPv4AddressStringifyOperatorConversion, IPv6AddressMatchOperatorConversion, LeastOperatorConversion, LikeOperatorConversion, MultiValueStringToArrayOperatorConversion, NestedDataOperatorConversions.JsonQueryArrayOperatorConversion, ReverseOperatorConversion, SafeDivideOperatorConversion, ScalarInArrayOperatorConversion, StringToArrayOperatorConversion, TextcatOperatorConversion

public class DirectOperatorConversion
extends Object
implements SqlOperatorConversion

Conversion for SQL operators that map 1-1 onto native functions.

Constructor Summary

Constructors

Constructor	Description
DirectOperatorConversion(org.apache.calcite.sql.SqlOperator operator, String druidFunctionName)

Method Summary

Modifier and Type	Method	Description
final org.apache.calcite.sql.SqlOperator	calciteOperator()	Returns the SQL operator corresponding to this function.
final String	getDruidFunctionName()
DruidExpression	toDruidExpression(PlannerContext plannerContext, RowSignature rowSignature, org.apache.calcite.rex.RexNode rexNode)	Translate a Calcite RexNode to a Druid expression.
DruidExpression	toDruidExpressionWithPostAggOperands(PlannerContext plannerContext, RowSignature rowSignature, org.apache.calcite.rex.RexNode rexNode, PostAggregatorVisitor postAggregatorVisitor)	Translate a Calcite RexNode to a Druid expression, with the possibility of having postagg operands.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.sql.calcite.expression.SqlOperatorConversion

toDruidFilter, toPostAggregator

Constructor Details

DirectOperatorConversion

public DirectOperatorConversion(org.apache.calcite.sql.SqlOperator operator,
 String druidFunctionName)

Method Details

calciteOperator

public final 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

getDruidFunctionName

public final String getDruidFunctionName()

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)

toDruidExpressionWithPostAggOperands

@Nullable
public DruidExpression toDruidExpressionWithPostAggOperands(PlannerContext plannerContext,
 RowSignature rowSignature,
 org.apache.calcite.rex.RexNode rexNode,
 PostAggregatorVisitor postAggregatorVisitor)

Description copied from interface: SqlOperatorConversion

Translate a Calcite RexNode to a Druid expression, with the possibility of having postagg operands.

Specified by:

toDruidExpressionWithPostAggOperands 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

postAggregatorVisitor - visitor that manages postagg names and tracks postaggs that were created as by the translation

Returns:

Druid expression, or null if translation is not possible

See Also:

• Expressions.toDruidExpression(PlannerContext, RowSignature, RexNode)