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Posted to issues@carbondata.apache.org by lionelcao <gi...@git.apache.org> on 2017/08/15 10:27:44 UTC
[GitHub] carbondata pull request #1258: [CARBONDATA-1325] Add partition guidance doc
GitHub user lionelcao opened a pull request:
https://github.com/apache/carbondata/pull/1258
[CARBONDATA-1325] Add partition guidance doc
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/lionelcao/carbondata carbon_910_016
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/carbondata/pull/1258.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1258
----
commit 4106881b361350aece8a01e6f848f09a92fc030e
Author: lionelcao <wh...@gmail.com>
Date: 2017-08-15T10:26:42Z
add partition guidance doc
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[GitHub] carbondata issue #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by asfgit <gi...@git.apache.org>.
Github user asfgit commented on the issue:
https://github.com/apache/carbondata/pull/1258
SUCCESS
--none--
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[GitHub] carbondata issue #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by ravipesala <gi...@git.apache.org>.
Github user ravipesala commented on the issue:
https://github.com/apache/carbondata/pull/1258
SDV Build Success with Spark 2.1, Please check CI http://144.76.159.231:8080/job/ApacheSDVTests/200/
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[GitHub] carbondata pull request #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by lionelcao <gi...@git.apache.org>.
Github user lionelcao commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1258#discussion_r135381322
--- Diff: docs/partition-guide.md ---
@@ -0,0 +1,124 @@
+<!--
+ 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.
+-->
+
+### 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.
--- End diff --
Please refer to dml documents about delete from statement.
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[GitHub] carbondata pull request #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by chenliang613 <gi...@git.apache.org>.
Github user chenliang613 commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1258#discussion_r133453134
--- Diff: docs/partition-guide.md ---
@@ -0,0 +1,124 @@
+<!--
+ 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.
+-->
+
+### 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
+```
--- End diff --
Please provide a specific example
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[GitHub] carbondata pull request #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by xuchuanyin <gi...@git.apache.org>.
Github user xuchuanyin commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1258#discussion_r133634053
--- Diff: docs/partition-guide.md ---
@@ -0,0 +1,124 @@
+<!--
+ 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.
+-->
+
+### 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.
--- End diff --
I think `the later partition` => `the next partition` is better
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[GitHub] carbondata issue #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by chenliang613 <gi...@git.apache.org>.
Github user chenliang613 commented on the issue:
https://github.com/apache/carbondata/pull/1258
@lionelcao please add one link in README.md for partition-guide.md
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[GitHub] carbondata pull request #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by asfgit <gi...@git.apache.org>.
Github user asfgit closed the pull request at:
https://github.com/apache/carbondata/pull/1258
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[GitHub] carbondata pull request #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by xuchuanyin <gi...@git.apache.org>.
Github user xuchuanyin commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1258#discussion_r133634143
--- Diff: docs/partition-guide.md ---
@@ -0,0 +1,124 @@
+<!--
+ 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.
+-->
+
+### 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.
--- End diff --
But where is the DELETE statement?
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---
[GitHub] carbondata issue #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by chenliang613 <gi...@git.apache.org>.
Github user chenliang613 commented on the issue:
https://github.com/apache/carbondata/pull/1258
LGTM
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[GitHub] carbondata pull request #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by zzcclp <gi...@git.apache.org>.
Github user zzcclp commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1258#discussion_r133619308
--- Diff: docs/partition-guide.md ---
@@ -0,0 +1,124 @@
+<!--
+ 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.
+-->
+
+### 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' ...)]
--- End diff --
change 'PARTITION_NUM' to 'NUM_PARTITIONS'
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[GitHub] carbondata issue #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by chenliang613 <gi...@git.apache.org>.
Github user chenliang613 commented on the issue:
https://github.com/apache/carbondata/pull/1258
retest this please
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[GitHub] carbondata pull request #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by zzcclp <gi...@git.apache.org>.
Github user zzcclp commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1258#discussion_r133619148
--- Diff: docs/partition-guide.md ---
@@ -0,0 +1,124 @@
+<!--
+ 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.
+-->
+
+### 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)
--- End diff --
The ‘PARTITIONED BY' must be before 'STORED BY', otherwise it will throw an error:
`mismatched input 'PARTITIONED' expecting {<EOF>, '(', 'SELECT', 'FROM', 'AS', 'WITH', 'VALUES', 'TABLE', 'INSERT', 'MAP', 'REDUCE', 'TBLPROPERTIES', 'LOCATION'}(line 11, pos 2)`
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[GitHub] carbondata issue #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by ravipesala <gi...@git.apache.org>.
Github user ravipesala commented on the issue:
https://github.com/apache/carbondata/pull/1258
SDV Build Success with Spark 2.1, Please check CI http://144.76.159.231:8080/job/ApacheSDVTests/237/
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[GitHub] carbondata issue #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by chenliang613 <gi...@git.apache.org>.
Github user chenliang613 commented on the issue:
https://github.com/apache/carbondata/pull/1258
retest this please
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[GitHub] carbondata pull request #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by lionelcao <gi...@git.apache.org>.
Github user lionelcao commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1258#discussion_r135380833
--- Diff: docs/partition-guide.md ---
@@ -0,0 +1,124 @@
+<!--
+ 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.
+-->
+
+### 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)
--- End diff --
I can see there are two functions validateTypeConvert and validateTypeConvertForSpark2 in CommonUtil.scala to validate partition column type. It's added by some other contributor.
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[GitHub] carbondata pull request #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by xuchuanyin <gi...@git.apache.org>.
Github user xuchuanyin commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1258#discussion_r133645471
--- Diff: docs/partition-guide.md ---
@@ -0,0 +1,124 @@
+<!--
+ 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.
+-->
+
+### 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)
--- End diff --
Is there any constraint on the datatype?
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[GitHub] carbondata issue #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by chenliang613 <gi...@git.apache.org>.
Github user chenliang613 commented on the issue:
https://github.com/apache/carbondata/pull/1258
retest this please
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[GitHub] carbondata pull request #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by xuchuanyin <gi...@git.apache.org>.
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 ---
@@ -0,0 +1,124 @@
+<!--
+ 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.
+-->
+
+### 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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[GitHub] carbondata issue #1258: [CARBONDATA-1325] Add partition guidance doc
Posted by chenliang613 <gi...@git.apache.org>.
Github user chenliang613 commented on the issue:
https://github.com/apache/carbondata/pull/1258
retest this please
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