1 files changed, 89 insertions, 0 deletions
diff --git a/exec/java-exec/src/main/codegen/templates/Decimal/CastDecimalVarDecimal.java b/exec/java-exec/src/main/codegen/templates/Decimal/CastDecimalVarDecimal.java
new file mode 100644
index 000000000..aeffe5a87
--- /dev/null
+++ b/exec/java-exec/src/main/codegen/templates/Decimal/CastDecimalVarDecimal.java
@@ -0,0 +1,89 @@
+/*
+ * 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.
+ */
+<@pp.dropOutputFile />
+
+<#list cast.types as type>
+<#if type.major == "DecimalToVarDecimal">
+
+<@pp.changeOutputFile name="/org/apache/drill/exec/expr/fn/impl/gcast/Cast${type.from}${type.to}.java" />
+
+<#include "/@includes/license.ftl" />
+
+package org.apache.drill.exec.expr.fn.impl.gcast;
+
+<#include "/@includes/vv_imports.ftl" />
+
+import org.apache.drill.exec.expr.DrillSimpleFunc;
+import org.apache.drill.exec.expr.annotations.FunctionTemplate;
+import org.apache.drill.exec.expr.annotations.FunctionTemplate.NullHandling;
+import org.apache.drill.exec.expr.annotations.Output;
+import org.apache.drill.exec.expr.annotations.Param;
+import org.apache.drill.exec.expr.holders.*;
+import org.apache.drill.exec.record.RecordBatch;
+import org.apache.drill.exec.expr.annotations.Workspace;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.DrillBuf;
+
+import java.nio.ByteBuffer;
+
+/*
+ * This class is generated using freemarker and the ${.template_name} template.
+ */
+@SuppressWarnings("unused")
+@FunctionTemplate(name = "cast${type.to?upper_case}",
+                  scope = FunctionTemplate.FunctionScope.SIMPLE,
+                  returnType = FunctionTemplate.ReturnType.DECIMAL_CAST,
+                  nulls = NullHandling.NULL_IF_NULL)
+public class Cast${type.from}${type.to} implements DrillSimpleFunc {
+
+  @Param ${type.from}Holder in;
+  @Inject DrillBuf buffer;
+  @Param IntHolder precision;
+  @Param IntHolder scale;
+  @Output ${type.to}Holder out;
+
+  public void setup() {
+  }
+
+  public void eval() {
+    java.math.BigDecimal bd =
+        <#if type.from == "Decimal9" || type.from == "Decimal18">
+        java.math.BigDecimal.valueOf(in.value)
+        <#else>
+        org.apache.drill.exec.util.DecimalUtility
+          <#if type.from.contains("Sparse")>
+            .getBigDecimalFromDrillBuf(in.buffer, in.start, in.nDecimalDigits, in.scale, true)
+          <#elseif type.from == "VarDecimal">
+            .getBigDecimalFromDrillBuf(in.buffer, in.start, in.end - in.start, in.scale)
+          </#if>
+        </#if>
+                .setScale(scale.value, java.math.RoundingMode.HALF_UP)
+                .round(new java.math.MathContext(precision.value, java.math.RoundingMode.HALF_UP));
+    out.scale = scale.value;
+    out.precision = precision.value;
+    out.start = 0;
+    byte[] bytes = bd.unscaledValue().toByteArray();
+    int len = bytes.length;
+    out.buffer = buffer.reallocIfNeeded(len);
+    out.buffer.setBytes(out.start, bytes);
+    out.end = out.start + len;
+  }
+}
+</#if>
+</#list>