[Feature] Flink Doris Connector (#5372)#5375

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morningman merged 15 commits intoapache:masterfrom

JNSimba:flink-connector-doris

Apr 23, 2021

Commits on Feb 9, 2021

[Feature] Add flink datastream connector example (#5371)
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Commits on Mar 19, 2021

[Fix]1. Optimize flink datastream related code ; 2. Refer to flink-connector-jdbc, add FlinkSql to create Doris table, and write to Doris table through streamload[Fix]
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Commits on Mar 22, 2021

[Test]:add flink connector Test cases
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Commits on Mar 25, 2021

[Fix]:delete fe ip in test cases
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Commits on Mar 26, 2021

[Fix]:move findPartitions to DorisTableSource
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Commits on Mar 29, 2021

[Fix]: doris sink adds batch write records
Simba
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Commits on Apr 6, 2021

[Fix]: add flink-doris-connector build script
Simba
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[Fix]:modify flink-doris-connector build script
Simba
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Commits on Apr 8, 2021

[Docs]: add flink-doris-connector document
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Commits on Apr 11, 2021

Commits on Apr 14, 2021

Commits on Apr 20, 2021

[Fix]:add pom profile
Simba
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