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Implement array_sum function in Java from SQL
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presto-benchmark/src/main/java/com/facebook/presto/benchmark/SqlArraySumBenchmark.java
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| /* | ||
| * 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 com.facebook.presto.benchmark; | ||
|
|
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| import com.facebook.presto.testing.LocalQueryRunner; | ||
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| import static com.facebook.presto.benchmark.BenchmarkQueryRunner.createLocalQueryRunner; | ||
|
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| public class SqlArraySumBenchmark | ||
| extends AbstractSqlBenchmark | ||
| { | ||
| public SqlArraySumBenchmark(LocalQueryRunner localQueryRunner, String query, String name) | ||
| { | ||
| super(localQueryRunner, name, 10, 10, query); | ||
| } | ||
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| public static void main(String[] args) | ||
| { | ||
| new SqlArraySumBenchmark(createLocalQueryRunner(), "SELECT ARRAY_SUM(x) FROM part cross join (SELECT transform(sequence(1,10000),y->random()) AS x)", "sql_array_sum").runBenchmark(new SimpleLineBenchmarkResultWriter(System.out)); | ||
| } | ||
| } |
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59 changes: 59 additions & 0 deletions
59
presto-main/src/main/java/com/facebook/presto/operator/scalar/ArraySumBigIntFunction.java
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| /* | ||
| * 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 com.facebook.presto.operator.scalar; | ||
|
|
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| import com.facebook.presto.common.block.Block; | ||
| import com.facebook.presto.common.type.Type; | ||
| import com.facebook.presto.spi.function.Description; | ||
| import com.facebook.presto.spi.function.OperatorDependency; | ||
| import com.facebook.presto.spi.function.ScalarFunction; | ||
| import com.facebook.presto.spi.function.SqlType; | ||
| import com.facebook.presto.spi.function.TypeParameter; | ||
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| import java.lang.invoke.MethodHandle; | ||
|
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| import static com.facebook.presto.common.function.OperatorType.ADD; | ||
| import static com.facebook.presto.util.Failures.internalError; | ||
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| @Description("Returns the sum of all array elements, or 0 if the array is empty. Ignores null elements.") | ||
| @ScalarFunction(value = "array_sum") | ||
| public final class ArraySumBigIntFunction | ||
| { | ||
| private ArraySumBigIntFunction() {} | ||
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| @SqlType("bigint") | ||
| public static long arraySumBigInt( | ||
| @OperatorDependency(operator = ADD, argumentTypes = {"bigint", "bigint"}) MethodHandle addFunction, | ||
| @TypeParameter("bigint") Type elementType, | ||
| @SqlType("array(bigint)") Block arrayBlock) | ||
| { | ||
| int positionCount = arrayBlock.getPositionCount(); | ||
| if (positionCount == 0) { | ||
| return 0; | ||
| } | ||
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| long sum = 0; | ||
| for (int i = 0; i < positionCount; i++) { | ||
| if (!arrayBlock.isNull(i)) { | ||
| try { | ||
| sum = (long) addFunction.invoke(sum, arrayBlock.getLong(i)); | ||
| } | ||
| catch (Throwable throwable) { | ||
| throw internalError(throwable); | ||
| } | ||
| } | ||
| } | ||
| return sum; | ||
| } | ||
| } |
61 changes: 61 additions & 0 deletions
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presto-main/src/main/java/com/facebook/presto/operator/scalar/ArraySumDoubleFunction.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| /* | ||
| * 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 com.facebook.presto.operator.scalar; | ||
|
|
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| import com.facebook.presto.common.block.Block; | ||
| import com.facebook.presto.common.type.Type; | ||
| import com.facebook.presto.spi.function.Description; | ||
| import com.facebook.presto.spi.function.OperatorDependency; | ||
| import com.facebook.presto.spi.function.ScalarFunction; | ||
| import com.facebook.presto.spi.function.SqlType; | ||
| import com.facebook.presto.spi.function.TypeParameter; | ||
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| import java.lang.invoke.MethodHandle; | ||
|
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| import static com.facebook.presto.common.function.OperatorType.ADD; | ||
| import static com.facebook.presto.common.type.TypeUtils.readNativeValue; | ||
| import static com.facebook.presto.util.Failures.internalError; | ||
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| @Description("Returns the sum of all array elements, or 0 if the array is empty. Ignores null elements.") | ||
| @ScalarFunction(value = "array_sum") | ||
| public final class ArraySumDoubleFunction | ||
| { | ||
| private ArraySumDoubleFunction() {} | ||
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| @SqlType("double") | ||
| public static double arraySumDouble( | ||
| @OperatorDependency(operator = ADD, argumentTypes = {"double", "double"}) MethodHandle addFunction, | ||
| @TypeParameter("double") Type elementType, | ||
| @SqlType("array(double)") Block arrayBlock) | ||
| { | ||
| int positionCount = arrayBlock.getPositionCount(); | ||
| if (positionCount == 0) { | ||
| return 0.0; | ||
| } | ||
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| double sum = 0.0; | ||
| for (int i = 0; i < positionCount; i++) { | ||
| if (!arrayBlock.isNull(i)) { | ||
| try { | ||
| Object newValue = readNativeValue(elementType, arrayBlock, i); | ||
| sum = (double) addFunction.invoke(sum, (double) newValue); | ||
| } | ||
| catch (Throwable throwable) { | ||
| throw internalError(throwable); | ||
| } | ||
| } | ||
| } | ||
| return sum; | ||
| } | ||
| } |
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61 changes: 61 additions & 0 deletions
61
presto-main/src/test/java/com/facebook/presto/operator/scalar/TestArraySumFunction.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| /* | ||
| * 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 com.facebook.presto.operator.scalar; | ||
|
|
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| import org.testng.annotations.Test; | ||
|
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| import static com.facebook.presto.common.type.BigintType.BIGINT; | ||
| import static com.facebook.presto.common.type.DoubleType.DOUBLE; | ||
|
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| public class TestArraySumFunction | ||
| extends AbstractTestFunctions | ||
| { | ||
| @Test | ||
| public void testBigIntType() | ||
| { | ||
| assertFunction("array_sum(array[BIGINT '1', BIGINT '2'])", BIGINT, 3L); | ||
| assertFunction("array_sum(array[INTEGER '1', INTEGER '2'])", BIGINT, 3L); | ||
| assertFunction("array_sum(array[SMALLINT '1', SMALLINT '2'])", BIGINT, 3L); | ||
| assertFunction("array_sum(array[TINYINT '1', TINYINT '2'])", BIGINT, 3L); | ||
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| assertFunction("array_sum(array[BIGINT '1', INTEGER '2'])", BIGINT, 3L); | ||
| assertFunction("array_sum(array[INTEGER '1', SMALLINT '2'])", BIGINT, 3L); | ||
| assertFunction("array_sum(array[SMALLINT '1', TINYINT '2'])", BIGINT, 3L); | ||
| } | ||
|
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| @Test | ||
| public void testDoubleType() | ||
| { | ||
| assertFunctionWithError("array_sum(array[DOUBLE '-2.0', DOUBLE '5.3'])", DOUBLE, 3.3); | ||
| assertFunctionWithError("array_sum(array[DOUBLE '-2.0', REAL '5.3'])", DOUBLE, 3.3); | ||
| assertFunctionWithError("array_sum(array[DOUBLE '-2.0', DECIMAL '5.3'])", DOUBLE, 3.3); | ||
| assertFunctionWithError("array_sum(array[REAL '-2.0', DECIMAL '5.3'])", DOUBLE, 3.3); | ||
|
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| assertFunctionWithError("array_sum(array[BIGINT '-2', DOUBLE '5.3'])", DOUBLE, 3.3); | ||
| assertFunctionWithError("array_sum(array[INTEGER '-2', REAL '5.3'])", DOUBLE, 3.3); | ||
| assertFunctionWithError("array_sum(array[SMALLINT '-2', DECIMAL '5.3'])", DOUBLE, 3.3); | ||
| assertFunctionWithError("array_sum(array[TINYINT '-2', DOUBLE '5.3'])", DOUBLE, 3.3); | ||
| } | ||
|
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| @Test | ||
| public void testEdgeCases() | ||
| { | ||
| assertFunction("array_sum(null)", BIGINT, null); | ||
| assertFunction("array_sum(array[])", BIGINT, 0L); | ||
| assertFunction("array_sum(array[NULL])", BIGINT, 0L); | ||
| assertFunction("array_sum(array[NULL, NULL, NULL])", BIGINT, 0L); | ||
| assertFunction("array_sum(array[3, NULL, 5])", BIGINT, 8L); | ||
| assertFunctionWithError("array_sum(array[NULL, double '1.2', double '2.3', NULL, -3])", DOUBLE, 0.5); | ||
| } | ||
| } |
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