commit | 45acd67ed742d89d539ec0351f77f08c7762e7de | [log] [tgz] |
---|---|---|
author | ShreelekhyaG <shreelu_gampa@yahoo.com> | Mon Jan 24 15:17:48 2022 +0530 |
committer | Indhumathi27 <indhumathim27@gmail.com> | Thu Apr 28 19:58:33 2022 +0530 |
tree | 34be73ab948c150e8ef8cc9323dd63b4b78ac5b3 | |
parent | 46b62cf6f79d1d826b498609435337b2ed342bbe [diff] |
[CARBONDATA-4330] Incremental Dataload of Average aggregate in MV Why is this PR needed? Currently, whenever MV is created with average aggregate, a full refresh is done meaning it reloads the whole MV for any newly added segments. This will slow down the loading. With incremental data load, only the segments that are newly added can be loaded to the MV. What changes were proposed in this PR? If avg is present, rewrite the query with the sum and count of the columns to create MV and use them to derive avg. Refer: https://docs.google.com/document/d/1kPEMCX50FLZcmyzm6kcIQtUH9KXWDIqh-Hco7NkTp80/edit Does this PR introduce any user interface change? No Is any new testcase added? Yes This closes #4257
Apache CarbonData is an indexed columnar data store solution for fast analytics on big data platform, e.g. Apache Hadoop, Apache Spark, etc.
You can find the latest CarbonData document and learn more at: http://carbondata.apache.org
CarbonData file format is a columnar store in HDFS, it has many features that a modern columnar format has, such as splittable, compression schema, complex data type etc, and CarbonData has following unique features:
CarbonData is built using Apache Maven, to build CarbonData
Some features are marked as experimental because the syntax/implementation might change in the future.
This is an active open source project for everyone, and we are always open to people who want to use this system or contribute to it. This guide document introduces how to contribute to CarbonData.
To get involved in CarbonData:
First join by emailing to dev-subscribe@carbondata.apache.org, then you can discuss issues by emailing to dev@carbondata.apache.org. You can also directly visit dev@carbondata.apache.org. Or you can visit Apache CarbonData Dev Mailing List archive.
Report issues on Apache Jira. If you do not already have an Apache JIRA account, sign up here.
You can also slack to get in touch with the community. After we invite you, you can use this Slack Link to sign in to CarbonData.
Of course, you can scan the QR Code to join in our WeChat Group to get in touch.
Apache CarbonData is an open source project of The Apache Software Foundation (ASF).