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feat: initial HashJoinRel support (substrait-io#187)
* fix: pojo to proto JoinRel conversion skipped postJoinFilter
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85 changes: 85 additions & 0 deletions
85
core/src/main/java/io/substrait/relation/physical/HashJoin.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| package io.substrait.relation.physical; | ||
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| import io.substrait.expression.Expression; | ||
| import io.substrait.expression.FieldReference; | ||
| import io.substrait.proto.HashJoinRel; | ||
| import io.substrait.relation.BiRel; | ||
| import io.substrait.relation.HasExtension; | ||
| import io.substrait.relation.RelVisitor; | ||
| import io.substrait.type.Type; | ||
| import io.substrait.type.TypeCreator; | ||
| import java.util.List; | ||
| import java.util.Optional; | ||
| import java.util.stream.Stream; | ||
| import org.immutables.value.Value; | ||
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| @Value.Immutable | ||
| public abstract class HashJoin extends BiRel implements HasExtension { | ||
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| public abstract List<FieldReference> getLeftKeys(); | ||
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| public abstract List<FieldReference> getRightKeys(); | ||
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| public abstract JoinType getJoinType(); | ||
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| public abstract Optional<Expression> getPostJoinFilter(); | ||
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| public static enum JoinType { | ||
| UNKNOWN(HashJoinRel.JoinType.JOIN_TYPE_UNSPECIFIED), | ||
| INNER(HashJoinRel.JoinType.JOIN_TYPE_INNER), | ||
| OUTER(HashJoinRel.JoinType.JOIN_TYPE_OUTER), | ||
| LEFT(HashJoinRel.JoinType.JOIN_TYPE_LEFT), | ||
| RIGHT(HashJoinRel.JoinType.JOIN_TYPE_RIGHT), | ||
| LEFT_SEMI(HashJoinRel.JoinType.JOIN_TYPE_LEFT_SEMI), | ||
| RIGHT_SEMI(HashJoinRel.JoinType.JOIN_TYPE_RIGHT_SEMI), | ||
| LEFT_ANTI(HashJoinRel.JoinType.JOIN_TYPE_LEFT_ANTI), | ||
| RIGHT_ANTI(HashJoinRel.JoinType.JOIN_TYPE_RIGHT_ANTI); | ||
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| private HashJoinRel.JoinType proto; | ||
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| JoinType(HashJoinRel.JoinType proto) { | ||
| this.proto = proto; | ||
| } | ||
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| public static JoinType fromProto(HashJoinRel.JoinType proto) { | ||
| for (var v : values()) { | ||
| if (v.proto == proto) { | ||
| return v; | ||
| } | ||
| } | ||
| throw new IllegalArgumentException("Unknown type: " + proto); | ||
| } | ||
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| public HashJoinRel.JoinType toProto() { | ||
| return proto; | ||
| } | ||
| } | ||
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| @Override | ||
| protected Type.Struct deriveRecordType() { | ||
| Stream<Type> leftTypes = | ||
| switch (getJoinType()) { | ||
| case RIGHT, OUTER -> getLeft().getRecordType().fields().stream() | ||
| .map(TypeCreator::asNullable); | ||
| case RIGHT_ANTI, RIGHT_SEMI -> Stream.empty(); | ||
| default -> getLeft().getRecordType().fields().stream(); | ||
| }; | ||
| Stream<Type> rightTypes = | ||
| switch (getJoinType()) { | ||
| case LEFT, OUTER -> getRight().getRecordType().fields().stream() | ||
| .map(TypeCreator::asNullable); | ||
| case LEFT_ANTI, LEFT_SEMI -> Stream.empty(); | ||
| default -> getRight().getRecordType().fields().stream(); | ||
| }; | ||
| return TypeCreator.REQUIRED.struct(Stream.concat(leftTypes, rightTypes)); | ||
| } | ||
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| @Override | ||
| public <O, E extends Exception> O accept(RelVisitor<O, E> visitor) throws E { | ||
| return visitor.visit(this); | ||
| } | ||
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| public static ImmutableHashJoin.Builder builder() { | ||
| return ImmutableHashJoin.builder(); | ||
| } | ||
| } |
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