diff options
Diffstat (limited to 'exec/java-exec/src/main/java/org/apache/drill/exec/planner/types/decimal/DecimalScalePrecisionDivideFunction.java')
-rw-r--r-- | exec/java-exec/src/main/java/org/apache/drill/exec/planner/types/decimal/DecimalScalePrecisionDivideFunction.java | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/exec/java-exec/src/main/java/org/apache/drill/exec/planner/types/decimal/DecimalScalePrecisionDivideFunction.java b/exec/java-exec/src/main/java/org/apache/drill/exec/planner/types/decimal/DecimalScalePrecisionDivideFunction.java new file mode 100644 index 000000000..eb79d44ae --- /dev/null +++ b/exec/java-exec/src/main/java/org/apache/drill/exec/planner/types/decimal/DecimalScalePrecisionDivideFunction.java @@ -0,0 +1,38 @@ +/* + * 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.drill.exec.planner.types.decimal; + +import static org.apache.drill.exec.planner.types.DrillRelDataTypeSystem.DRILL_REL_DATATYPE_SYSTEM; + +public class DecimalScalePrecisionDivideFunction extends DrillBaseComputeScalePrecision { + + public DecimalScalePrecisionDivideFunction(int leftPrecision, int leftScale, int rightPrecision, int rightScale) { + super(leftPrecision, leftScale, rightPrecision, rightScale); + } + + @Override + public void computeScalePrecision(int leftPrecision, int leftScale, int rightPrecision, int rightScale) { + + // compute the output scale and precision here + int maxResultIntegerDigits = Math.min(leftPrecision - leftScale + rightScale, MAX_NUMERIC_PRECISION); + outputScale = Math.max(6, leftScale + rightPrecision + 1); + outputScale = Math.min(outputScale, MAX_NUMERIC_PRECISION - maxResultIntegerDigits); + outputScale = Math.min(outputScale, DRILL_REL_DATATYPE_SYSTEM.getMaxNumericScale()); + outputPrecision = maxResultIntegerDigits + outputScale; + } +} |