[Bug] ResultSetMetaData.getCatalogName throws IndexOutOfBoundsException instead of SQLException for out-of-range columns

Start in the class containing IoTDBResultMetadata.getCatalogName(int) and compare it with the seven sibling ResultSetMetaData accessors that call checkColumnIndex(column) first. Reproduce the issue with getCatalogName(0) or another out-of-range column, then verify that invalid indexes consistently produce SQLException rather than IndexOutOfBoundsException.

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• I searched in the issues and found nothing similar.

Version

master (2.0.x). The affected code is also present in released 2.0.x versions.

Describe the bug and provide the minimal reproduce step

IoTDBResultMetadata.getCatalogName(int column) reads columnInfoList.get(column - 1) before its range check runs, so an out-of-range column index throws a raw IndexOutOfBoundsException instead of the SQLException required by the ResultSetMetaData contract. The subsequent range check (if (column < 1 || column > columnInfoList.size())) is therefore unreachable for an out-of-range column. The seven sibling ResultSetMetaData accessors in the same class all call checkColumnIndex(column) first; getCatalogName is the only one missing that guard.

Minimal reproduce step:

1. Obtain a ResultSetMetaData from any (non-empty) query result.
2. Call metaData.getCatalogName(0) (or any column index <= 0 or > column count).
3. A raw IndexOutOfBoundsException is thrown instead of a SQLException.

What did you expect to see?

getCatalogName throws a SQLException for an out-of-range column index, consistent with the ResultSetMetaData contract and with the sibling accessors.

What did you see instead?

A raw java.lang.IndexOutOfBoundsException from columnInfoList.get(column - 1).

Anything else?

The fix is to call checkColumnIndex(column) first, as the sibling accessors already do — it throws SQLException on column <= 0, column > size, and an empty column list. I'd like to work on this and will open a PR.

Are you willing to submit a PR?

• I'm willing to submit a PR!