I'd like to discuss whether we should support type expansion. If we do, I'll work on it. Best regards, Zhiwei Niu
zhiwei niu <[email protected]> 于2026年10月21日周三 19:51写道： > Hi community, > > I'm new to the Spark community, > and I'd like to discuss the first issue I'd like to work on. The problem > is as follows: > > When executing the following two commands in spark-shell: > > - CREATE TABLE default.test_table (test_col VARCHAR(10)); > - ALTER TABLE default.test_table ALTER COLUMN test_col TYPE VARCHAR(25); > > > The following error is reported: > org.apache.spark.sql.AnalysisException: [NOT_SUPPORTED_CHANGE_COLUMN] > ALTER TABLE ALTER/CHANGE COLUMN is not supported for changing > `spark_catalog`.`default`.`test_table`'s column `test_col` with type > "VARCHAR(10)" to `test_col` with type "VARCHAR(25)". SQLSTATE: 0A000; line > 1 pos 0 > > Looking forward to everyone's replies! > > > Best regards, > Zhiwei Niu >
