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https://issues.apache.org/jira/browse/PHOENIX-4643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16394039#comment-16394039
]
ASF GitHub Bot commented on PHOENIX-4643:
-----------------------------------------
Github user JamesRTaylor commented on a diff in the pull request:
https://github.com/apache/phoenix/pull/294#discussion_r173612840
--- Diff:
phoenix-core/src/main/java/org/apache/phoenix/expression/function/ArrayRemoveFunction.java
---
@@ -0,0 +1,79 @@
+/*
+ * 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.phoenix.expression.function;
+
+import java.util.List;
+
+import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
+import org.apache.phoenix.expression.Expression;
+import org.apache.phoenix.parse.FunctionParseNode;
+import org.apache.phoenix.schema.SortOrder;
+import org.apache.phoenix.schema.TypeMismatchException;
+import org.apache.phoenix.schema.types.PArrayDataTypeDecoder;
+import org.apache.phoenix.schema.types.PArrayDataTypeEncoder;
+import org.apache.phoenix.schema.types.PBinaryArray;
+import org.apache.phoenix.schema.types.PDataType;
+import org.apache.phoenix.schema.types.PVarbinary;
+import org.apache.phoenix.schema.types.PVarbinaryArray;
+
+@FunctionParseNode.BuiltInFunction(name = ArrayRemoveFunction.NAME, args =
{
+ @FunctionParseNode.Argument(allowedTypes = {
PBinaryArray.class, PVarbinaryArray.class }),
+ @FunctionParseNode.Argument(allowedTypes = { PVarbinary.class
}, defaultValue = "null") })
+public class ArrayRemoveFunction extends ArrayModifierFunction {
+
+ public static final String NAME = "ARRAY_REMOVE";
+
+ public ArrayRemoveFunction() {
+ }
+
+ public ArrayRemoveFunction(List<Expression> children) throws
TypeMismatchException {
+ super(children);
+ }
+
+ @Override
+ protected boolean modifierFunction(ImmutableBytesWritable ptr, int
length, int offset, byte[] arrayBytes,
+ PDataType baseType, int arrayLength, Integer maxLength,
Expression arrayExp) {
+ SortOrder sortOrder = arrayExp.getSortOrder();
+
+ if (ptr.getLength() == 0 || arrayBytes.length == 0) {
+ ptr.set(arrayBytes, offset, length);
+ return true;
+ }
+
+ PArrayDataTypeEncoder arrayDataTypeEncoder = new
PArrayDataTypeEncoder(baseType, sortOrder);
+
+ for (int arrayIndex = 0; arrayIndex < arrayLength;
arrayIndex++) {
+ ImmutableBytesWritable ptr2 = new
ImmutableBytesWritable(arrayBytes, offset, length);
+ PArrayDataTypeDecoder.positionAtArrayElement(ptr2,
arrayIndex, baseType, maxLength);
+ if (baseType.compareTo(ptr2, sortOrder, ptr, sortOrder,
baseType) != 0) {
--- End diff --
This looks good. Can you make sure you have tests around removing an
element from an array where the element type is slightly different than the
array element type? For example, removing an int from a long array or removing
a long from a decimal array?
> Implement ARRAY_REMOVE built in function
> -----------------------------------------
>
> Key: PHOENIX-4643
> URL: https://issues.apache.org/jira/browse/PHOENIX-4643
> Project: Phoenix
> Issue Type: New Feature
> Reporter: Xavier Jodoin
> Priority: Minor
>
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