org.apache.druid.sql.calcite.expression

Interface SqlOperatorConversion

All Known Implementing Classes:

AliasedOperatorConversion, ArrayConstructorOperatorConversion, ArrayContainsOperatorConversion, ArrayLengthOperatorConversion, ArrayOffsetOfOperatorConversion, ArrayOffsetOperatorConversion, ArrayOrdinalOfOperatorConversion, ArrayOrdinalOperatorConversion, ArrayOverlapOperatorConversion, ArrayToStringOperatorConversion, BaseExpressionDimFilterOperatorConversion, BinaryOperatorConversion, BTrimOperatorConversion, CastOperatorConversion, CeilOperatorConversion, ConcatOperatorConversion, DateTruncOperatorConversion, DirectOperatorConversion, ExtractOperatorConversion, FloorOperatorConversion, IPv4AddressMatchOperatorConversion, IPv4AddressParseOperatorConversion, IPv4AddressStringifyOperatorConversion, LeftOperatorConversion, LikeOperatorConversion, LPadOperatorConversion, LTrimOperatorConversion, MillisToTimestampOperatorConversion, MultiValueStringAppendOperatorConversion, MultiValueStringConcatOperatorConversion, MultiValueStringPrependOperatorConversion, MultiValueStringSliceOperatorConversion, ParseLongOperatorConversion, PositionOperatorConversion, QueryLookupOperatorConversion, RegexpExtractOperatorConversion, ReinterpretOperatorConversion, RepeatOperatorConversion, ReverseOperatorConversion, RightOperatorConversion, RoundOperatorConversion, RPadOperatorConversion, RTrimOperatorConversion, StringFormatOperatorConversion, StringToMultiValueStringOperatorConversion, StrposOperatorConversion, SubstringOperatorConversion, TextcatOperatorConversion, TimeArithmeticOperatorConversion, TimeArithmeticOperatorConversion.TimeMinusIntervalOperatorConversion, TimeArithmeticOperatorConversion.TimePlusIntervalOperatorConversion, TimeCeilOperatorConversion, TimeExtractOperatorConversion, TimeFloorOperatorConversion, TimeFormatOperatorConversion, TimeParseOperatorConversion, TimeShiftOperatorConversion, TimestampToMillisOperatorConversion, TrimOperatorConversion, TruncateOperatorConversion, UnaryFunctionOperatorConversion, 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.
default 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.
default DimFilter	toDruidFilter(PlannerContext plannerContext, RowSignature rowSignature, VirtualColumnRegistry virtualColumnRegistry, org.apache.calcite.rex.RexNode rexNode) Returns a Druid filter corresponding to a Calcite RexNode used as a filter condition.
default PostAggregator	toPostAggregator(PlannerContext plannerContext, RowSignature querySignature, org.apache.calcite.rex.RexNode rexNode, PostAggregatorVisitor postAggregatorVisitor) Returns a Druid PostAggregator corresponding to a Calcite RexNode used to transform a row after aggregation has occurred.

Method Detail

calciteOperator

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

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

Returns:

operator

toDruidExpression

@Nullable
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)

toDruidExpressionWithPostAggOperands

@Nullable
default 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.

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)

toDruidFilter

@Nullable
default DimFilter toDruidFilter(PlannerContext plannerContext,
                                          RowSignature rowSignature,
                                          @Nullable
                                          VirtualColumnRegistry virtualColumnRegistry,
                                          org.apache.calcite.rex.RexNode rexNode)

Returns a Druid filter corresponding to a Calcite RexNode used as a filter condition.

Parameters:

plannerContext - SQL planner context

rowSignature - input row signature

virtualColumnRegistry - re-usable virtual column references

rexNode - filter expression rex node

Returns:

filter, or null if the call cannot be translated to a filter

toPostAggregator

@Nullable
default PostAggregator toPostAggregator(PlannerContext plannerContext,
                                                  RowSignature querySignature,
                                                  org.apache.calcite.rex.RexNode rexNode,
                                                  PostAggregatorVisitor postAggregatorVisitor)

Returns a Druid PostAggregator corresponding to a Calcite RexNode used to transform a row after aggregation has occurred.

Parameters:

plannerContext - SQL planner context

querySignature - 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 by the translation

Returns:

filter, or null if the call cannot be translated