watermelon12138 opened a new pull request, #5246:
URL: https://github.com/apache/hudi/pull/5246
Assume that there are only two fields name and age in table hudi_table.
1、Schema evolution is supported when DDL operations are executed
concurrently. For example, if "alter table hudi_table add columns(gender string
after name); " and "alter table hudi_table9 add columns(score int);" are
executed concurrently, the submitted schema must contain the gender and score
columns.
2、Schema evolution is supported when DDL and DML operations are executed
concurrently. For example, if "alter table hudi_table add columns(gender string
after name);" and "insert into hudi_table values("Richard", 18);" are executed
concurrently, the submitted schema must contain the gender column and the data
inserted into hudi_table can also be written.
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