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Add support for double to varchar coercion in hive tables
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56 changes: 56 additions & 0 deletions
56
plugin/trino-hive/src/main/java/io/trino/plugin/hive/coercions/DoubleToVarcharCoercer.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| /* | ||
| * Licensed 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 io.trino.plugin.hive.coercions; | ||
|
|
||
| import io.airlift.slice.Slice; | ||
| import io.airlift.slice.Slices; | ||
| import io.trino.spi.TrinoException; | ||
| import io.trino.spi.block.Block; | ||
| import io.trino.spi.block.BlockBuilder; | ||
| import io.trino.spi.type.DoubleType; | ||
| import io.trino.spi.type.VarcharType; | ||
|
|
||
| import static io.airlift.slice.SliceUtf8.countCodePoints; | ||
| import static io.trino.spi.StandardErrorCode.INVALID_ARGUMENTS; | ||
| import static io.trino.spi.type.DoubleType.DOUBLE; | ||
| import static java.lang.String.format; | ||
|
|
||
| public class DoubleToVarcharCoercer | ||
| extends TypeCoercer<DoubleType, VarcharType> | ||
| { | ||
| private final boolean treatNaNAsNull; | ||
|
|
||
| public DoubleToVarcharCoercer(VarcharType toType, boolean treatNaNAsNull) | ||
| { | ||
| super(DOUBLE, toType); | ||
| this.treatNaNAsNull = treatNaNAsNull; | ||
| } | ||
|
|
||
| @Override | ||
| protected void applyCoercedValue(BlockBuilder blockBuilder, Block block, int position) | ||
| { | ||
| double doubleValue = DOUBLE.getDouble(block, position); | ||
|
|
||
| if (Double.isNaN(doubleValue) && treatNaNAsNull) { | ||
| blockBuilder.appendNull(); | ||
| return; | ||
| } | ||
|
|
||
| Slice converted = Slices.utf8Slice(Double.toString(doubleValue)); | ||
| if (!toType.isUnbounded() && countCodePoints(converted) > toType.getBoundedLength()) { | ||
| throw new TrinoException(INVALID_ARGUMENTS, format("Varchar representation of %s exceeds %s bounds", doubleValue, toType)); | ||
| } | ||
| toType.writeSlice(blockBuilder, converted); | ||
| } | ||
| } |
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89 changes: 89 additions & 0 deletions
89
...trino-hive/src/test/java/io/trino/plugin/hive/coercions/TestDoubleToVarcharCoercions.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| /* | ||
| * Licensed 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 io.trino.plugin.hive.coercions; | ||
|
|
||
| import io.airlift.slice.Slices; | ||
| import io.trino.plugin.hive.coercions.CoercionUtils.CoercionContext; | ||
| import io.trino.spi.TrinoException; | ||
| import io.trino.spi.block.Block; | ||
| import io.trino.spi.type.Type; | ||
| import org.testng.annotations.DataProvider; | ||
| import org.testng.annotations.Test; | ||
|
|
||
| import java.util.stream.Stream; | ||
|
|
||
| import static io.trino.plugin.hive.HiveTimestampPrecision.DEFAULT_PRECISION; | ||
| import static io.trino.plugin.hive.HiveType.toHiveType; | ||
| import static io.trino.plugin.hive.coercions.CoercionUtils.createCoercer; | ||
| import static io.trino.spi.predicate.Utils.blockToNativeValue; | ||
| import static io.trino.spi.predicate.Utils.nativeValueToBlock; | ||
| import static io.trino.spi.type.DoubleType.DOUBLE; | ||
| import static io.trino.spi.type.VarcharType.createUnboundedVarcharType; | ||
| import static io.trino.spi.type.VarcharType.createVarcharType; | ||
| import static io.trino.testing.DataProviders.cartesianProduct; | ||
| import static io.trino.testing.DataProviders.toDataProvider; | ||
| import static io.trino.testing.DataProviders.trueFalse; | ||
| import static io.trino.type.InternalTypeManager.TESTING_TYPE_MANAGER; | ||
| import static org.assertj.core.api.Assertions.assertThat; | ||
| import static org.assertj.core.api.Assertions.assertThatThrownBy; | ||
|
|
||
| public class TestDoubleToVarcharCoercions | ||
| { | ||
| @Test(dataProvider = "doubleValues") | ||
| public void testDoubleToVarcharCoercions(Double doubleValue, boolean treatNaNAsNull) | ||
| { | ||
| assertCoercions(DOUBLE, doubleValue, createUnboundedVarcharType(), Slices.utf8Slice(doubleValue.toString()), treatNaNAsNull); | ||
| } | ||
|
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| @Test(dataProvider = "doubleValues") | ||
| public void testDoubleSmallerVarcharCoercions(Double doubleValue, boolean treatNaNAsNull) | ||
| { | ||
| assertThatThrownBy(() -> assertCoercions(DOUBLE, doubleValue, createVarcharType(1), doubleValue.toString(), treatNaNAsNull)) | ||
| .isInstanceOf(TrinoException.class) | ||
| .hasMessageContaining("Varchar representation of %s exceeds varchar(1) bounds", doubleValue); | ||
| } | ||
|
|
||
| @Test | ||
| public void testNaNToVarcharCoercions() | ||
| { | ||
| assertCoercions(DOUBLE, Double.NaN, createUnboundedVarcharType(), null, true); | ||
|
|
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| assertCoercions(DOUBLE, Double.NaN, createUnboundedVarcharType(), Slices.utf8Slice("NaN"), false); | ||
| assertThatThrownBy(() -> assertCoercions(DOUBLE, Double.NaN, createVarcharType(1), "NaN", false)) | ||
| .isInstanceOf(TrinoException.class) | ||
| .hasMessageContaining("Varchar representation of NaN exceeds varchar(1) bounds"); | ||
| } | ||
|
|
||
| @DataProvider | ||
| public Object[][] doubleValues() | ||
| { | ||
| return cartesianProduct( | ||
| Stream.of( | ||
| Double.NEGATIVE_INFINITY, | ||
| Double.MIN_VALUE, | ||
| Double.MAX_VALUE, | ||
| Double.POSITIVE_INFINITY, | ||
| Double.parseDouble("123456789.12345678")) | ||
| .collect(toDataProvider()), | ||
| trueFalse()); | ||
| } | ||
|
|
||
| public static void assertCoercions(Type fromType, Object valueToBeCoerced, Type toType, Object expectedValue, boolean treatNaNAsNull) | ||
| { | ||
| Block coercedValue = createCoercer(TESTING_TYPE_MANAGER, toHiveType(fromType), toHiveType(toType), new CoercionContext(DEFAULT_PRECISION, treatNaNAsNull)).orElseThrow() | ||
| .apply(nativeValueToBlock(fromType, valueToBeCoerced)); | ||
| assertThat(blockToNativeValue(toType, coercedValue)) | ||
| .isEqualTo(expectedValue); | ||
| } | ||
| } |
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