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https://issues.apache.org/jira/browse/HUDI-5971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alberic Liu updated HUDI-5971:
------------------------------
Affects Version/s: 0.12.2
> About full schema evolution, alter column type do not support nest column but
> can alter inside struct type
> ----------------------------------------------------------------------------------------------------------
>
> Key: HUDI-5971
> URL: https://issues.apache.org/jira/browse/HUDI-5971
> Project: Apache Hudi
> Issue Type: Bug
> Components: spark-sql
> Affects Versions: 0.12.2
> Reporter: Alberic Liu
> Priority: Major
> Labels: schema-evolution
>
> reproduce steps:
> * create the test table:
> CREATE TABLE default.schema_evolution_test (
> id bigint,
> test_array array<int>,
> test_array_struct ARRAY<STRUCT<name:STRING,
> age:INT>>)
> USING hudi
> TBLPROPERTIES (
> type = 'cow',
> primaryKey = 'id')
> LOCATION 's3://trino-ci-test/schema_evolution_test'
>
> * enable the full schema evolution
> SET hoodie.schema.on.read.enable=true
>
> * alter the nested table column type, there is exception
> {color:#de350b}SQL A:{color} alter table default.schema_evolution_test alter
> column test_array_struct type ARRAY<STRUCT<name:STRING, age:FLOAT>>;
> Exception: Failed in [alter table default.schema_evolution_test alter column
> test_array_struct type ARRAY<STRUCT<name:STRING, age:FLOAT>>]
> java.lang.IllegalArgumentException: only support update primitive type but
> find nest column: test_array_struct
> at
> org.apache.hudi.internal.schema.action.TableChanges$ColumnUpdateChange.updateColumnType(TableChanges.java:89)
> at
> org.apache.spark.sql.hudi.command.AlterTableCommand.$anonfun$applyUpdateAction$1(AlterTableCommand.scala:149)
>
> * alter the inner struct type, it can execute successfully
> {color:#de350b}SQL B:{color} alter table default.schema_evolution_test alter
> column test_array_struct.element.age type FLOAT;
>
> * Describe the table schema；
> desc default.schema_evolution_test;
> id bigint
>
> test_array array<int>
> test_array_struct array<struct<name:string,age:float>>
>
> * Questions:
> ## is this a bug of alter table column type for Hudi?
> ## Both SQL A and SQL B is used to change the type from
> array<struct<name:string,age:int>> to array<struct<name:string,age:float>>,
> why SQL A do not supported?
> ## SQL B is worked as expected or not? and SQL A will be supported in next
> release?
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