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[FLINK-33495][FLINK-33496] Add DISTRIBUTED BY clause for CREATE TABLE
- Adds distribution support to CatalogTable - Adds connector ability SupportsBucketing - Adds distribution to TableDescriptor. This closes apache#24155.
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110 changes: 110 additions & 0 deletions
110
...table/flink-sql-parser/src/main/java/org/apache/flink/sql/parser/ddl/SqlDistribution.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package org.apache.flink.sql.parser.ddl; | ||
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| import org.apache.calcite.sql.SqlCall; | ||
| import org.apache.calcite.sql.SqlKind; | ||
| import org.apache.calcite.sql.SqlNode; | ||
| import org.apache.calcite.sql.SqlNodeList; | ||
| import org.apache.calcite.sql.SqlNumericLiteral; | ||
| import org.apache.calcite.sql.SqlOperator; | ||
| import org.apache.calcite.sql.SqlSpecialOperator; | ||
| import org.apache.calcite.sql.SqlWriter; | ||
| import org.apache.calcite.sql.parser.SqlParserPos; | ||
| import org.apache.calcite.util.ImmutableNullableList; | ||
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| import javax.annotation.Nullable; | ||
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| import java.util.List; | ||
| import java.util.Optional; | ||
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| /** | ||
| * Distribution statement in CREATE TABLE DDL, e.g. {@code DISTRIBUTED BY HASH(column1, column2) | ||
| * INTO BUCKETS 10}. | ||
| */ | ||
| public class SqlDistribution extends SqlCall { | ||
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| private static final SqlSpecialOperator OPERATOR = | ||
| new SqlSpecialOperator("DISTRIBUTED BY", SqlKind.OTHER); | ||
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| private final String distributionKind; | ||
| private final SqlNodeList bucketColumns; | ||
| private final SqlNumericLiteral bucketCount; | ||
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| public SqlDistribution( | ||
| SqlParserPos pos, | ||
| @Nullable String distributionKind, | ||
| @Nullable SqlNodeList bucketColumns, | ||
| @Nullable SqlNumericLiteral bucketCount) { | ||
| super(pos); | ||
| this.distributionKind = distributionKind; | ||
| this.bucketColumns = bucketColumns; | ||
| this.bucketCount = bucketCount; | ||
| } | ||
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| @Override | ||
| public SqlOperator getOperator() { | ||
| return OPERATOR; | ||
| } | ||
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| @Override | ||
| public List<SqlNode> getOperandList() { | ||
| return ImmutableNullableList.of(bucketCount, bucketColumns); | ||
| } | ||
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| @Override | ||
| public void unparse(SqlWriter writer, int leftPrec, int rightPrec) { | ||
| writer.newlineAndIndent(); | ||
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| if (bucketColumns.size() == 0 && bucketCount != null) { | ||
| writer.keyword("DISTRIBUTED INTO"); | ||
| bucketCount.unparse(writer, leftPrec, rightPrec); | ||
| writer.keyword("BUCKETS"); | ||
| writer.newlineAndIndent(); | ||
| return; | ||
| } | ||
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| writer.keyword("DISTRIBUTED BY"); | ||
| if (distributionKind != null) { | ||
| writer.print(distributionKind); | ||
| } | ||
| SqlWriter.Frame bucketFrame = writer.startList("(", ")"); | ||
| bucketColumns.unparse(writer, leftPrec, rightPrec); | ||
| writer.endList(bucketFrame); | ||
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| if (bucketCount != null) { | ||
| writer.keyword("INTO"); | ||
| bucketCount.unparse(writer, leftPrec, rightPrec); | ||
| writer.keyword("BUCKETS"); | ||
| } | ||
| writer.newlineAndIndent(); | ||
| } | ||
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| public Optional<String> getDistributionKind() { | ||
| return Optional.ofNullable(distributionKind); | ||
| } | ||
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| public SqlNumericLiteral getBucketCount() { | ||
| return bucketCount; | ||
| } | ||
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| public SqlNodeList getBucketColumns() { | ||
| return bucketColumns; | ||
| } | ||
| } |
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