Fix ResultSetMetaData.getCatalogName throwing IndexOutOfBoundsException instead of SQLException for out-of-range columns

[PDGGK]

Description

IoTDBResultMetadata.getCatalogName read columnInfoList.get(column - 1) before its range check, so an out-of-range column index threw a raw IndexOutOfBoundsException instead of the SQLException required by the ResultSetMetaData contract (the range check was therefore unreachable). This calls checkColumnIndex(column) first — as the seven sibling accessors in the class already do — and removes the now-redundant inline range check. checkColumnIndex is a strict superset of that check (it also rejects an empty column list) and throws a proper SQLException.

A test is added asserting that an out-of-range column throws SQLException rather than IndexOutOfBoundsException, and that a valid column is unaffected.

This closes #18241.

[Copilot]

Pull request overview

This PR fixes a JDBC ResultSetMetaData contract violation in IoTDBResultMetadata#getCatalogName(int) where an out-of-range column index could throw IndexOutOfBoundsException (due to columnInfoList.get(column - 1) being executed before validation) instead of the required SQLException. The change aligns getCatalogName with the existing validation pattern already used by sibling metadata accessors.

Changes:

• Add an early checkColumnIndex(column) guard to IoTDBResultMetadata#getCatalogName and remove the now-unreachable inline range check.
• Add a unit test asserting out-of-range indices throw SQLException (not IndexOutOfBoundsException) and that a valid index remains unaffected.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
iotdb-client/jdbc/src/main/java/org/apache/iotdb/jdbc/IoTDBResultMetadata.java	Ensures getCatalogName validates column indices via checkColumnIndex before list access, returning SQLException for invalid indices.
iotdb-client/jdbc/src/test/java/org/apache/iotdb/jdbc/IoTDBResultMetadataTest.java	Adds coverage for the out-of-range behavior and validates no regression for a valid column.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.