Github user xuchuanyin commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1258#discussion_r133645214
--- Diff: docs/partition-guide.md ---
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+
+### CarbonData Partition Table Guidance
+This guidance illustrates how to create & use partition table in
CarbonData.
+
+* [Create Partition Table](#create-partition-table)
+ - [Create Hash Partition Table](#create-hash-partition-table)
+ - [Create Range Partition Table](#create-range-partition-table)
+ - [Create List Partition Table](#create-list-partition-table)
+* [Show Partitions](#show-partitions)
+* [Maintain the Partitions](#maintain-the-partitions)
+* [Partition Id](#partition-id)
+* [Tips](#tips)
+
+### Create Partition Table
+
+##### Create Hash Partition Table
+```
+ CREATE TABLE [IF NOT EXISTS] [db_name.]table_name
+ [(col_name data_type , ...)]
+ STORED BY 'carbondata'
+ PARTITIONED BY (partition_col_name data_type)
+ [TBLPROPERTIES ('PARTITION_TYPE'='HASH',
+ 'PARTITION_NUM'='N' ...)]
+ //N is the number of hash partitions
+```
+
+##### Create Range Partition Table
+```
+ CREATE TABLE [IF NOT EXISTS] [db_name.]table_name
+ [(col_name data_type , ...)]
+ STORED BY 'carbondata'
+ PARTITIONED BY (partition_col_name data_type)
+ [TBLPROPERTIES ('PARTITION_TYPE'='RANGE',
+ 'RANGE_INFO'='2014-01-01, 2015-01-01, 2016-01-01' ...)]
+```
+Notes:
+1. The 'RANGE_INFO' defined in table properties must be in ascending order.
+2. If the partition column is Date/Timestamp type, the format could be
defined in CarbonProperties. By default it's yyyy-MM-dd.
+
+##### Create List Partition Table
+```
+ CREATE TABLE [IF NOT EXISTS] [db_name.]table_name
+ [(col_name data_type , ...)]
+ STORED BY 'carbondata'
+ PARTITIONED BY (partition_col_name data_type)
+ [TBLPROPERTIES ('PARTITION_TYPE'='LIST',
+ 'LIST_INFO'='A, B, C' ...)]
+```
+Notes:
+1. List partition support list info in one level group. For example,
+```
+ ...
+ 'LIST_INFO' = 'A, B, (C, D), (E, F, G), H'
+ ...
+```
+
+
+### Show Partitions
+Execute following command to get the partition information
+```
+ SHOW PARTITIONS [db_name.]table_name
+
+```
+
+### Maintain the Partitions
+##### Add a new partition
+```
+ ALTER TABLE [db_name].table_name ADD PARTITION('new_partition')
+```
+##### Split a partition
+```
+ ALTER TABLE [db_name].table_name SPLIT PARTITION(partition_id)
INTO('new_partition1', 'new_partition2'...)
+```
+##### Drop a partition
+```
+ //Drop partition definition only and keep data
+ ALTER TABLE [db_name].table_name DROP PARTITION(partition_id)
+
+ //Drop both partition definition and data
+ ALTER TABLE [db_name].table_name DROP PARTITION(partition_id) WITH DATA
+```
+Notes:
+1. For the 1st case(keep data),
+ * if the table is a range partition table, data will be merged into the
later partition, and if the dropped partition is the last one, then data will
be merged into default partition.
+ * if the table is a list partition table, data will be merged into
default partition.
+2. Drop default partition is not allowed, but you can use DELETE statement
to delete data in default partition.
+3. partition_id could be got from SHOW PARTITIONS command.
+4. Hash partition table is not supported for the ADD, SPLIT, DROP command.
+
+### Partition Id
+In carbon partition table, we use partition id to replace the task id
--- End diff --
@lionelcao Can you add a document to explain the partition feature, such as
implementation and why implement in this way?
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