1 files changed, 44 insertions, 0 deletions
diff --git a/exec/java-exec/src/main/java/org/apache/drill/exec/planner/types/decimal/DecimalScalePrecisionModFunction.java b/exec/java-exec/src/main/java/org/apache/drill/exec/planner/types/decimal/DecimalScalePrecisionModFunction.java
new file mode 100644
index 000000000..6901580eb
--- /dev/null
+++ b/exec/java-exec/src/main/java/org/apache/drill/exec/planner/types/decimal/DecimalScalePrecisionModFunction.java
@@ -0,0 +1,44 @@
+/*
+ * 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 DecimalScalePrecisionModFunction extends DrillBaseComputeScalePrecision {
+
+  public DecimalScalePrecisionModFunction(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
+    outputScale = Math.max(leftScale, rightScale);
+    int leftIntegerDigits = leftPrecision - leftScale;
+
+    outputPrecision = DRILL_REL_DATATYPE_SYSTEM.getMaxNumericPrecision();
+
+    if (outputScale + leftIntegerDigits > outputPrecision) {
+      outputScale = outputPrecision - leftIntegerDigits;
+    }
+
+    // Output precision should atleast be greater or equal to the input precision
+    outputPrecision = Math.max(outputPrecision, Math.max(leftPrecision, rightPrecision));
+  }
+}