twalthr commented on a change in pull request #14111:
URL: https://github.com/apache/flink/pull/14111#discussion_r525878851
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File path: docs/dev/table/sourceSinks.zh.md
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@@ -193,6 +192,149 @@ for more information.
The runtime implementation of a `LookupTableSource` is a `TableFunction` or
`AsyncTableFunction`. The function
will be called with values for the given lookup keys during runtime.
+#### Defining a Dynamic Table Source with Projection Push-Down
Review comment:
How about we just describe the interfaces in 1 or 2 sentences. Maybe in
a table. And link to the corresponding class on Github. It is very difficult to
keep docs and interfaces in sync. We should avoid code duplication.
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