[Subtask] support UpdateColumnDefaultValue in AlterTable for spark connector

[FANNG1]

Describe the subtask

please add related code to com.datastrato.gravitino.spark.catalogGravitinoCatalog.java, transfrom Spark UpdateColumnDefaultValue to Gravitino UpdateColumnDefaultValue, you could refer to #2502 , Hive doesn't support update column default value for now, so no need to add integrate test.

public Table alterTable(Identifier ident, TableChange... changes) throws NoSuchTableException { }

Parent issue

#1227

[charliecheng630]

I would like to work on this. @FANNG1

[FANNG1]

@charliecheng630 thanks for taking this.

[FANNG1]

@charliecheng630 , I just noticed that Gravitino doesn't support UpdateColumnDefaultValue for now, we need to support it in a separate issue before adding it to Spark. cc @mchades

[charliecheng630]

@mchades Can I create a separate issue to perform UpdateColumnDefaultValue for Gravitino?

[mchades]

@mchades Can I create a separate issue to perform UpdateColumnDefaultValue for Gravitino?

Yeah, I was also thinking of doing that. Go ahead and do that. 😄

[charliecheng630]

@FANNG1 @mchades The defautValue of UpdateColumnDefaultValue in spark connector is String, but in Gravitino it should be Expression.
Can the default value of a string be converted into an expression?

[mchades]

Maybe you can try to convert it to StringLiteral, I guess the Spark engine will do the implicit conversion