commit | ac647c3c2becbc0f5a453f4e1b8687da33ce6417 | [log] [tgz] |
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author | akashrn5 <akashnilugal@gmail.com> | Fri Feb 28 12:30:39 2020 +0530 |
committer | Jacky Li <jacky.likun@qq.com> | Wed Mar 04 14:53:33 2020 +0800 |
tree | 4e5a2ca6df0c40b6481a815ace6fd7f1299bc246 | |
parent | 99300c059ef928820642923ecd6cc461d05364f1 [diff] |
[CARBONDATA-3725]fix concurrent creation of Materialized Views issue Why is this PR needed? When two create MVs are running concurrently in two different sessions with two different databases, then in any create fails in any session, other sessions's current database is changed and corresponding queries fails with table not found exception. What changes were proposed in this PR? When the session is changed we need to clear the datamap catalog map which may lead to this problem. Initially it was handled only for query and other flows, it wasnt handled in create MV flow. Handled same, make proper synchronisations to avoid these problems. Does this PR introduce any user interface change? Yes. (added a isSchemaRegistered in DatamapCatalog Interface, which is required to avoid multiple registration of same datamap schemas) Is any new testcase added? No, existing test cases will take care This closes #3642
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
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 introduce how to contribute to CarbonData.
To get involved in CarbonData:
Apache CarbonData is an open source project of The Apache Software Foundation (ASF).