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51 changes: 51 additions & 0 deletions
51
presto-main/src/main/java/com/facebook/presto/type/FastDecimalOperators.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| /* | ||
| * 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.type; | ||
|
|
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| import com.facebook.presto.operator.scalar.ScalarOperator; | ||
| import com.facebook.presto.spi.type.DecimalArithmetic; | ||
| import io.airlift.slice.Slice; | ||
|
|
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| import static com.facebook.presto.metadata.OperatorType.ADD; | ||
| import static com.facebook.presto.metadata.OperatorType.CAST; | ||
| import static com.facebook.presto.metadata.OperatorType.MULTIPLY; | ||
|
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| public final class FastDecimalOperators | ||
| { | ||
| private FastDecimalOperators() {} | ||
|
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| @ScalarOperator(ADD) | ||
| @LiteralParameters({"p", "s"}) | ||
| @SqlType("fast_decimal(min(38, p + 1), s)") | ||
| public static Slice add(@SqlType("fast_decimal(p, s)") Slice a, @SqlType("fast_decimal(p, s)") Slice b) | ||
| { | ||
| return DecimalArithmetic.add(a, b); | ||
| } | ||
|
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| @ScalarOperator(MULTIPLY) | ||
| @LiteralParameters({"a_precision", "a_scale", "b_precision", "b_scale"}) | ||
| @SqlType("fast_decimal(min(38, a_precision + b_precision), a_scale + b_scale)") | ||
| public static Slice multiply(@SqlType("fast_decimal(a_precision, a_scale)") Slice a, @SqlType("fast_decimal(b_precision, b_scale)") Slice b) | ||
| { | ||
| return DecimalArithmetic.multiply(a, b); | ||
| } | ||
|
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| @ScalarOperator(CAST) | ||
| @LiteralParameters({"p", "s"}) | ||
| @SqlType("fast_decimal(p, s)") | ||
| public static Slice cast(@SqlType("fast_decimal(p, s)") Slice a) | ||
| { | ||
| return a; | ||
| } | ||
| } |
62 changes: 62 additions & 0 deletions
62
presto-main/src/main/java/com/facebook/presto/type/FastDecimalParametricType.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package com.facebook.presto.type; | ||
|
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| import com.facebook.presto.spi.type.StandardTypes; | ||
| import com.facebook.presto.spi.type.Type; | ||
| import com.facebook.presto.spi.type.TypeParameter; | ||
| import org.jetbrains.annotations.NotNull; | ||
|
|
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| import java.util.List; | ||
|
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| import static com.facebook.presto.spi.type.FastDecimalType.createDecimalType; | ||
| import static com.facebook.presto.spi.type.FastDecimalType.createUnparametrizedDecimal; | ||
| import static com.google.common.base.Preconditions.checkArgument; | ||
|
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| public class FastDecimalParametricType | ||
| implements ParametricType | ||
| { | ||
| public static final FastDecimalParametricType FAST_DECIMAL = new FastDecimalParametricType(); | ||
|
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| @Override | ||
| public String getName() | ||
| { | ||
| return StandardTypes.FAST_DECIMAL; | ||
| } | ||
|
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| @Override | ||
| public Type createType(List<TypeParameter> parameters) | ||
| { | ||
| if (parameters.size() == 0) { | ||
| // we need support for that for support of unparametrized TypeSignatures which are | ||
| // used for defining DECIMAL related functions. See e.g. DecimalOperators class. | ||
| return createUnparametrizedDecimal(); | ||
| } | ||
|
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| return createParametrizedDecimal(parameters); | ||
| } | ||
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| @NotNull | ||
| private Type createParametrizedDecimal(List<TypeParameter> parameters) | ||
| { | ||
| checkArgument(parameters.size() == 2, "Expected 2 literal parameters for DECIMAL"); | ||
| TypeParameter precision = parameters.get(0); | ||
| TypeParameter scale = parameters.get(1); | ||
| checkArgument(precision.isLongLiteral() && | ||
| scale.isLongLiteral(), "Expected both literal parameters for DECIMAL to be numbers"); | ||
|
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| return createDecimalType(precision.getLongLiteral().intValue(), scale.getLongLiteral().intValue()); | ||
| } | ||
| } |
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