Flink: Add column to position bug

[SteveStevenpoor]

Apache Iceberg version

1.11.0 (latest release)

Query engine

Flink

Please describe the bug 🐞

Problem

Currently if you try to add column to position through Flink engine, column will be added at the end of the table. The Spark engine works correctly for such operation. So we need a fix for Flink.

Fix

Add applyModifyColumnPosition if addColumn.getPosition() != null

Verification

• Added testAlterTableAddColumnPosition() to TestFlinkCatalogTable

Willingness to contribute

• I can contribute a fix for this bug independently
• I would be willing to contribute a fix for this bug with guidance from the Iceberg community
• I cannot contribute a fix for this bug at this time