Class TextTable from the java-client project doesn't hold column data types metadata

I was writing a scala client taking this project as a basement but I found something strange that later @xiangfu0 confirmed it as a bug.

Let's start here: https://github.com/apache/pinot/blob/5becf5b81c996a6be39a22fd99aacfa7f1b3e1ac/pinot-clients/pinot-java-client/src/main/java/org/apache/pinot/client/ResultTableResultSet.java#L113

In that method there are 2 instructions in lines 122 and 123 putting column names and column data types in a TextTable's object but when going into that class I found out there is no way this table can hold both headers as you can see here:
https://github.com/apache/pinot/blob/5becf5b81c996a6be39a22fd99aacfa7f1b3e1ac/pinot-clients/pinot-java-client/src/main/java/org/apache/pinot/client/ResultTableResultSet.java#L122
https://github.com/apache/pinot/blob/5becf5b81c996a6be39a22fd99aacfa7f1b3e1ac/pinot-clients/pinot-java-client/src/main/java/org/apache/pinot/client/ResultTableResultSet.java#L123
https://github.com/apache/pinot/blob/5becf5b81c996a6be39a22fd99aacfa7f1b3e1ac/pinot-clients/pinot-java-client/src/main/java/org/apache/pinot/client/TextTable.java#L38

Let me know if I can do something to help.

Best regards,
Alexander

Start in pinot-clients/pinot-java-client/src/main/java/org/apache/pinot/client/ResultTableResultSet.java at the referenced lines, then inspect TextTable.java and how its headers are stored. Confirm how column names and data types are passed and retained; done means a TextTable can preserve both pieces of column metadata for the Java client result.

Written by the indexing model from the issue text.