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new dba11f7 [FLINK-12253][table-common] Add a DECIMAL type
dba11f7 is described below
commit dba11f70d06f504a2ac6ed3bbe1a019bc42f7d66
Author: Timo Walther <twal...@apache.org>
AuthorDate: Tue Apr 30 17:05:26 2019 +0200
[FLINK-12253][table-common] Add a DECIMAL type
---
.../flink/table/types/logical/DecimalType.java | 158 +++++++++++++++++++++
.../table/types/logical/LogicalTypeVisitor.java | 2 +
.../apache/flink/table/types/LogicalTypesTest.java | 15 ++
3 files changed, 175 insertions(+)
diff --git
a/flink-table/flink-table-common/src/main/java/org/apache/flink/table/types/logical/DecimalType.java
b/flink-table/flink-table-common/src/main/java/org/apache/flink/table/types/logical/DecimalType.java
new file mode 100644
index 0000000..017bcd4
--- /dev/null
+++
b/flink-table/flink-table-common/src/main/java/org/apache/flink/table/types/logical/DecimalType.java
@@ -0,0 +1,158 @@
+/*
+ * 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.flink.table.types.logical;
+
+import org.apache.flink.annotation.PublicEvolving;
+import org.apache.flink.table.api.ValidationException;
+
+import java.math.BigDecimal;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import java.util.Set;
+
+/**
+ * Logical type of a decimal number with fixed precision and scale.
+ *
+ * <p>The serialized string representation is {@code DECIMAL(p, s)} where
{@code p} is the number of
+ * digits in a number (=precision) and {@code s} is the number of digits to
the right of the decimal
+ * point in a number (=scale). {@code p} must have a value between 1 and 38
(both inclusive). {@code s}
+ * must have a value between 0 and {@code p} (both inclusive). The default
value for {@code p} is 10.
+ * The default value for {@code s} is 0.
+ */
+@PublicEvolving
+public final class DecimalType extends LogicalType {
+
+ private static final int MIN_PRECISION = 1;
+
+ private static final int MAX_PRECISION = 38;
+
+ private static final int DEFAULT_PRECISION = 10;
+
+ private static final int MIN_SCALE = 0;
+
+ private static final int DEFAULT_SCALE = 0;
+
+ private static final String FORMAT = "DECIMAL(%d, %d)";
+
+ private static final Set<String> INPUT_OUTPUT_CONVERSION =
conversionSet(
+ BigDecimal.class.getName(),
+ "org.apache.flink.table.dataformat.Decimal");
+
+ private static final Class<?> DEFAULT_CONVERSION = BigDecimal.class;
+
+ private final int precision;
+
+ private final int scale;
+
+ public DecimalType(boolean isNullable, int precision, int scale) {
+ super(isNullable, LogicalTypeRoot.DECIMAL);
+ if (precision < MIN_PRECISION || precision > MAX_PRECISION) {
+ throw new ValidationException(
+ String.format(
+ "Decimal precision must be between %d
and %d (both inclusive).",
+ MIN_PRECISION,
+ MAX_PRECISION));
+ }
+ if (scale < MIN_SCALE || scale > precision) {
+ throw new ValidationException(
+ String.format(
+ "Decimal scale must be between %d and
the precision %d (both inclusive).",
+ MIN_SCALE,
+ precision));
+ }
+ this.precision = precision;
+ this.scale = scale;
+ }
+
+ public DecimalType(int precision, int scale) {
+ this(true, precision, scale);
+ }
+
+ public DecimalType(int precision) {
+ this(precision, DEFAULT_SCALE);
+ }
+
+ public DecimalType() {
+ this(DEFAULT_PRECISION);
+ }
+
+ public int getPrecision() {
+ return precision;
+ }
+
+ public int getScale() {
+ return scale;
+ }
+
+ @Override
+ public LogicalType copy(boolean isNullable) {
+ return new DecimalType(isNullable, precision, scale);
+ }
+
+ @Override
+ public String asSerializableString() {
+ return withNullability(FORMAT, precision, scale);
+ }
+
+ @Override
+ public boolean supportsInputConversion(Class<?> clazz) {
+ return INPUT_OUTPUT_CONVERSION.contains(clazz.getName());
+ }
+
+ @Override
+ public boolean supportsOutputConversion(Class<?> clazz) {
+ return INPUT_OUTPUT_CONVERSION.contains(clazz.getName());
+ }
+
+ @Override
+ public Class<?> getDefaultConversion() {
+ return DEFAULT_CONVERSION;
+ }
+
+ @Override
+ public List<LogicalType> getChildren() {
+ return Collections.emptyList();
+ }
+
+ @Override
+ public <R> R accept(LogicalTypeVisitor<R> visitor) {
+ return visitor.visit(this);
+ }
+
+ @Override
+ public boolean equals(Object o) {
+ if (this == o) {
+ return true;
+ }
+ if (o == null || getClass() != o.getClass()) {
+ return false;
+ }
+ if (!super.equals(o)) {
+ return false;
+ }
+ DecimalType that = (DecimalType) o;
+ return precision == that.precision && scale == that.scale;
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(super.hashCode(), precision, scale);
+ }
+}
diff --git
a/flink-table/flink-table-common/src/main/java/org/apache/flink/table/types/logical/LogicalTypeVisitor.java
b/flink-table/flink-table-common/src/main/java/org/apache/flink/table/types/logical/LogicalTypeVisitor.java
index c7192a9..2ec9ca5 100644
---
a/flink-table/flink-table-common/src/main/java/org/apache/flink/table/types/logical/LogicalTypeVisitor.java
+++
b/flink-table/flink-table-common/src/main/java/org/apache/flink/table/types/logical/LogicalTypeVisitor.java
@@ -39,5 +39,7 @@ public interface LogicalTypeVisitor<R> {
R visit(VarBinaryType varBinaryType);
+ R visit(DecimalType decimalType);
+
R visit(LogicalType other);
}
diff --git
a/flink-table/flink-table-common/src/test/java/org/apache/flink/table/types/LogicalTypesTest.java
b/flink-table/flink-table-common/src/test/java/org/apache/flink/table/types/LogicalTypesTest.java
index 2fe2f97..def5d76 100644
---
a/flink-table/flink-table-common/src/test/java/org/apache/flink/table/types/LogicalTypesTest.java
+++
b/flink-table/flink-table-common/src/test/java/org/apache/flink/table/types/LogicalTypesTest.java
@@ -21,6 +21,7 @@ package org.apache.flink.table.types;
import org.apache.flink.table.types.logical.BinaryType;
import org.apache.flink.table.types.logical.BooleanType;
import org.apache.flink.table.types.logical.CharType;
+import org.apache.flink.table.types.logical.DecimalType;
import org.apache.flink.table.types.logical.LogicalType;
import org.apache.flink.table.types.logical.VarBinaryType;
import org.apache.flink.table.types.logical.VarCharType;
@@ -29,6 +30,7 @@ import org.apache.flink.util.InstantiationUtil;
import org.junit.Assert;
import org.junit.Test;
+import java.math.BigDecimal;
import java.util.Arrays;
import static org.junit.Assert.assertEquals;
@@ -106,6 +108,19 @@ public class LogicalTypesTest {
);
}
+ @Test
+ public void testDecimalType() {
+ testAll(
+ new DecimalType(10, 2),
+ "DECIMAL(10, 2)",
+ "DECIMAL(10, 2)",
+ new Class[]{BigDecimal.class},
+ new Class[]{BigDecimal.class},
+ new LogicalType[]{},
+ new DecimalType()
+ );
+ }
+
//
--------------------------------------------------------------------------------------------
private static void testAll(
