[jira] [Created] (FLINK-4686) Add possibility to get column names

["Timo Walther (JIRA)" <ji...@apache.org>]

Timo Walther created FLINK-4686:
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             Summary: Add possibility to get column names
                 Key: FLINK-4686
                 URL: https://issues.apache.org/jira/browse/FLINK-4686
             Project: Flink
          Issue Type: New Feature
          Components: Table API & SQL
            Reporter: Timo Walther


For debugging and maybe for visualization in future (e.g. in a shell) it would be good to have the possibilty to get the names of {{Table}} columns. At the moment the user has no idea how the table columns are named; if they need to be matched with POJO fields for example.

My suggestion:

{code}
Schema s = table.schema();
TypeInformation<?> type = s.getType(1);
TypeInformation<?> type = s.getType("col");
String s = s.getColumnName(1);
String[] s = s.getColumnNames();
{code}



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