dianfu opened a new pull request #7626: [FLINK-11450][table] Port and move TableSource and TableSink to flink-table-common URL: https://github.com/apache/flink/pull/7626 ## What is the purpose of the change *This pull request ported the following classes to flink-table-common: TableSource, TableSink, TableSinkBase, DefinedFieldMapping, NestedFieldsProjectableTableSource, ProjectableTableSource, TableConnectorUtil, ExternalCatalog, ExternalCatalogTable, Metadata, MetadataValidator, Schema, SchematicDescriptor, Statistics, StatisticsValidator, StreamTableDescriptorValidator, StreamableDescriptor, TableDescriptor, ColumnStats, TableStats* ## Brief change log - *Ported source/sink related classes to flink-table-common: TableSource, TableSink, TableSinkBase, DefinedFieldMapping, NestedFieldsProjectableTableSource, ProjectableTableSource, TableConnectorUtil* - *Ported ExternalCatalog to flink-table-common and also the classes it depends on: ExternalCatalogTable, Metadata, MetadataValidator, Schema, SchematicDescriptor, Statistics, StatisticsValidator, StreamTableDescriptorValidator, StreamableDescriptor, TableDescriptor, ColumnStats, TableStats, TableNotExistException, CatalogNotExistException* - *Ported the tests to flink-table-common* The following things should be noted: - *The package name of TableConnectorUtil is changed from util to utils as there is a utils package in flink-table-common. Just create a util package for backward compatibility. Not sure if this is needed?* - *The interface of Schema.rowtime is changed as it depends on Rowtime which cannot be moved to flink-table-common for the time being as Rowtime depends on Expression* - *The constants variables are copied from SchemeValidator to Scheme as they are needed by Scheme, but SchemeValidator cannot be moved to flink-table-common for the time being. Have not moved these constants directly to Schema as I noticed all the constants are defined in Validator classes* - *StreamableDescriptor don't extends TableDescriptor anymore as otherwise it cannot be defined as an interface any more. * ## Verifying this change This change is a trivial rework / code cleanup without any test coverage. ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): (no) - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (no) - The serializers: (no) - The runtime per-record code paths (performance sensitive): (no) - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (no) - The S3 file system connector: (no) ## Documentation - Does this pull request introduce a new feature? (no) - If yes, how is the feature documented? (docs)
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