Github user lionelcao commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1105#discussion_r126327975
--- Diff:
core/src/main/java/org/apache/carbondata/core/scan/partition/RangeIntervalPartitioner.java
---
@@ -0,0 +1,206 @@
+/*
+ * 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.carbondata.core.scan.partition;
+
+import java.io.Serializable;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.List;
+
+import org.apache.carbondata.core.constants.CarbonCommonConstants;
+import org.apache.carbondata.core.metadata.datatype.DataType;
+import org.apache.carbondata.core.metadata.schema.PartitionInfo;
+import org.apache.carbondata.core.util.CarbonProperties;
+
+/**
+ * Range Interval Partitioner
+ */
+
+public class RangeIntervalPartitioner implements Partitioner {
+
+ private int numPartitions;
+ private RangeIntervalComparator comparator;
+ private List<Object> boundsList = new ArrayList<>();
+ private String intervalType;
+ private DataType partitionColumnDataType;
+
+ private SimpleDateFormat timestampFormatter = new
SimpleDateFormat(CarbonProperties.getInstance()
+ .getProperty(CarbonCommonConstants.CARBON_TIMESTAMP_FORMAT,
+ CarbonCommonConstants.CARBON_TIMESTAMP_DEFAULT_FORMAT));
+
+ private SimpleDateFormat dateFormatter = new
SimpleDateFormat(CarbonProperties.getInstance()
+ .getProperty(CarbonCommonConstants.CARBON_DATE_FORMAT,
+ CarbonCommonConstants.CARBON_DATE_DEFAULT_FORMAT));
+
+ public RangeIntervalPartitioner(PartitionInfo partitionInfo) {
+ List<String> values = partitionInfo.getRangeIntervalInfo();
+ partitionColumnDataType =
partitionInfo.getColumnSchemaList().get(0).getDataType();
+ numPartitions = values.size() - 1;
+ // -1 is just for instead of null
+ boundsList.add(-1L);
+ for (int i = 0; i < numPartitions; i++) {
+ boundsList.add(PartitionUtil.getDataBasedOnDataType(values.get(i),
partitionColumnDataType,
+ timestampFormatter, dateFormatter));
+ }
+ comparator = new RangeIntervalComparator();
+ intervalType = values.get(numPartitions);
+ }
+
+ @Override public int numPartitions() {
+ String numParStr = CarbonProperties.getInstance().getProperty(
+ CarbonCommonConstants.MAX_PARTITION_FOR_RANGE_INTERVAL,
+ CarbonCommonConstants.DEFAULT_MAX_PARTITION_FOR_RANGE_INTERVAL);
+ return Integer.parseInt(numParStr);
+ }
+
+ @Override public int getPartition(Object key) {
+ int partitionIndex = -1;
+ Object lastBound = boundsList.get(boundsList.size() - 1);
+ if (key == null) {
+ return 0;
+ } else {
+ for (int i = 1; i <= numPartitions; i++) {
+ if (comparator.compareTo(key, boundsList.get(i))) {
+ return i;
+ }
+ }
+ switch (intervalType.toLowerCase()) {
+ case "year":
+ partitionIndex = getDynamicPartitionForYear(key, lastBound);
+ break;
+ case "month":
+ partitionIndex = getDynamicPartitionForMonth(key, lastBound);
+ break;
+ case "week":
+ partitionIndex = getDynamicPartitionForWeek(key, lastBound);
+ break;
+ case "day":
+ partitionIndex = getDynamicPartitionForDay(key, lastBound);
+ break;
+ case "hour":
+ partitionIndex = getDynamicPartitionForHour(key, lastBound);
+ break;
+ default:
+ partitionIndex = -1;
+ }
+ // if value's partitionId is great than max partition, return 0 for
it.
+ if (partitionIndex >= numPartitions()) {
+ return 0;
+ }
+ return partitionIndex;
+ }
+ }
+
+ public int getDynamicPartitionForYear(Object key, Object lastBound) {
+ int partitionId = -1;
+ Calendar lastCalendar = Calendar.getInstance();
+ Calendar keyCal = Calendar.getInstance();
+ keyCal.setTimeInMillis((long)key);
+ lastCalendar.setTimeInMillis((long)lastBound);
+ while (true) {
+ lastCalendar.add(Calendar.YEAR, 1);
+ boundsList.add(boundsList.size(), lastCalendar.getTimeInMillis());
+ ++numPartitions;
+ if (keyCal.compareTo(lastCalendar) == -1) {
+ partitionId = numPartitions;
+ break;
+ }
+ }
+ return partitionId;
--- End diff --
this should be partition index
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