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[arrow] Introduce paimon-arrow module to provide utils to convert pai…
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…mon Row to Arrow FieldVector (apache#3969)
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@yuzelin
yuzelin authored Aug 16, 2024
1 parent c8ff93f commit b493215
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112 changes: 112 additions & 0 deletions paimon-arrow/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<!--
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.
-->
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<parent>
<artifactId>paimon-parent</artifactId>
<groupId>org.apache.paimon</groupId>
<version>0.9-SNAPSHOT</version>
</parent>

<artifactId>paimon-arrow</artifactId>
<name>Paimon : Arrow</name>

<packaging>jar</packaging>

<properties>
<arrow.version>14.0.0</arrow.version>
</properties>

<dependencies>

<dependency>
<groupId>org.apache.paimon</groupId>
<artifactId>paimon-core</artifactId>
<version>${project.version}</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>org.apache.paimon</groupId>
<artifactId>paimon-common</artifactId>
<version>${project.version}</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>org.apache.arrow</groupId>
<artifactId>arrow-vector</artifactId>
<version>${arrow.version}</version>
<scope>provided</scope>
</dependency>

<!-- test dependencies -->

<dependency>
<groupId>org.apache.paimon</groupId>
<artifactId>paimon-format</artifactId>
<version>${project.version}</version>
<scope>test</scope>
</dependency>

<dependency>
<groupId>org.apache.paimon</groupId>
<artifactId>paimon-test-utils</artifactId>
<version>${project.version}</version>
<scope>test</scope>
</dependency>

<dependency>
<groupId>org.apache.arrow</groupId>
<artifactId>arrow-memory-unsafe</artifactId>
<version>${arrow.version}</version>
<scope>test</scope>
</dependency>

<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
<version>${hadoop.version}</version>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
</exclusion>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
</exclusions>
</dependency>

<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-hdfs-client</artifactId>
<version>${hadoop.version}</version>
<scope>test</scope>
</dependency>

</dependencies>

</project>
185 changes: 185 additions & 0 deletions paimon-arrow/src/main/java/org/apache/paimon/arrow/ArrowFieldTypeConversion.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.
*/

package org.apache.paimon.arrow;

import org.apache.paimon.types.ArrayType;
import org.apache.paimon.types.BigIntType;
import org.apache.paimon.types.BinaryType;
import org.apache.paimon.types.BooleanType;
import org.apache.paimon.types.CharType;
import org.apache.paimon.types.DataType;
import org.apache.paimon.types.DataTypeVisitor;
import org.apache.paimon.types.DateType;
import org.apache.paimon.types.DecimalType;
import org.apache.paimon.types.DoubleType;
import org.apache.paimon.types.FloatType;
import org.apache.paimon.types.IntType;
import org.apache.paimon.types.LocalZonedTimestampType;
import org.apache.paimon.types.MapType;
import org.apache.paimon.types.MultisetType;
import org.apache.paimon.types.RowType;
import org.apache.paimon.types.SmallIntType;
import org.apache.paimon.types.TimeType;
import org.apache.paimon.types.TimestampType;
import org.apache.paimon.types.TinyIntType;
import org.apache.paimon.types.VarBinaryType;
import org.apache.paimon.types.VarCharType;

import org.apache.arrow.vector.types.TimeUnit;
import org.apache.arrow.vector.types.Types;
import org.apache.arrow.vector.types.pojo.ArrowType;
import org.apache.arrow.vector.types.pojo.FieldType;

import java.time.ZoneId;

/** Utils for conversion between Paimon {@link DataType} and Arrow {@link FieldType}. */
public class ArrowFieldTypeConversion {

public static final ArrowFieldTypeVisitor ARROW_FIELD_TYPE_VISITOR =
new ArrowFieldTypeVisitor();

/** Convert {@link DataType} to {@link FieldType}. */
public static class ArrowFieldTypeVisitor implements DataTypeVisitor<FieldType> {

@Override
public FieldType visit(CharType charType) {
return new FieldType(charType.isNullable(), Types.MinorType.VARCHAR.getType(), null);
}

@Override
public FieldType visit(VarCharType varCharType) {
return new FieldType(varCharType.isNullable(), Types.MinorType.VARCHAR.getType(), null);
}

@Override
public FieldType visit(BooleanType booleanType) {
return new FieldType(booleanType.isNullable(), Types.MinorType.BIT.getType(), null);
}

@Override
public FieldType visit(BinaryType binaryType) {
return new FieldType(
binaryType.isNullable(), Types.MinorType.VARBINARY.getType(), null);
}

@Override
public FieldType visit(VarBinaryType varBinaryType) {
return new FieldType(
varBinaryType.isNullable(), Types.MinorType.VARBINARY.getType(), null);
}

@Override
public FieldType visit(DecimalType decimalType) {
return new FieldType(
decimalType.isNullable(),
new ArrowType.Decimal(decimalType.getPrecision(), decimalType.getScale(), 128),
null);
}

@Override
public FieldType visit(TinyIntType tinyIntType) {
return new FieldType(tinyIntType.isNullable(), Types.MinorType.TINYINT.getType(), null);
}

@Override
public FieldType visit(SmallIntType smallIntType) {
return new FieldType(
smallIntType.isNullable(), Types.MinorType.SMALLINT.getType(), null);
}

@Override
public FieldType visit(IntType intType) {
return new FieldType(intType.isNullable(), Types.MinorType.INT.getType(), null);
}

@Override
public FieldType visit(BigIntType bigIntType) {
return new FieldType(bigIntType.isNullable(), Types.MinorType.BIGINT.getType(), null);
}

@Override
public FieldType visit(FloatType floatType) {
return new FieldType(floatType.isNullable(), Types.MinorType.FLOAT4.getType(), null);
}

@Override
public FieldType visit(DoubleType doubleType) {
return new FieldType(doubleType.isNullable(), Types.MinorType.FLOAT8.getType(), null);
}

@Override
public FieldType visit(DateType dateType) {
return new FieldType(dateType.isNullable(), Types.MinorType.DATEDAY.getType(), null);
}

@Override
public FieldType visit(TimeType timeType) {
return new FieldType(timeType.isNullable(), Types.MinorType.TIMEMILLI.getType(), null);
}

@Override
public FieldType visit(TimestampType timestampType) {
int precision = timestampType.getPrecision();
TimeUnit timeUnit = getTimeUnit(precision);
ArrowType arrowType = new ArrowType.Timestamp(timeUnit, null);
return new FieldType(timestampType.isNullable(), arrowType, null);
}

@Override
public FieldType visit(LocalZonedTimestampType localZonedTimestampType) {
int precision = localZonedTimestampType.getPrecision();
TimeUnit timeUnit = getTimeUnit(precision);
ArrowType arrowType =
new ArrowType.Timestamp(timeUnit, ZoneId.systemDefault().toString());
return new FieldType(localZonedTimestampType.isNullable(), arrowType, null);
}

private TimeUnit getTimeUnit(int precision) {
if (precision == 0) {
return TimeUnit.SECOND;
} else if (precision >= 1 && precision <= 3) {
return TimeUnit.MILLISECOND;
} else if (precision >= 4 && precision <= 6) {
return TimeUnit.MICROSECOND;
} else {
return TimeUnit.NANOSECOND;
}
}

@Override
public FieldType visit(ArrayType arrayType) {
return new FieldType(arrayType.isNullable(), Types.MinorType.LIST.getType(), null);
}

@Override
public FieldType visit(MultisetType multisetType) {
throw new UnsupportedOperationException("Doesn't support MultisetType.");
}

@Override
public FieldType visit(MapType mapType) {
return new FieldType(mapType.isNullable(), new ArrowType.Map(false), null);
}

@Override
public FieldType visit(RowType rowType) {
return new FieldType(rowType.isNullable(), Types.MinorType.STRUCT.getType(), null);
}
}
}
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