[GitHub] [hudi] xiarixiaoyao commented on issue #5519: [SUPPORT] Schema Evolution - Error with datatype promotion

[GitBox <gi...@apache.org>]

xiarixiaoyao commented on issue #5519:
URL: https://github.com/apache/hudi/issues/5519#issuecomment-1124442163

   @neerajpadarthi   @JoshuaZhuCN  @gy19951022  pls try to use "set hoodie.schema.on.read.enable=true" to enable schem evolution.
   step1:  start spark-sql  and set hoodie.schema.on.read.enable=true
   # Spark SQL for spark 3.1.x
   spark-sql --packages org.apache.hudi:hudi-spark3.1.2-bundle_2.12:0.11.1,org.apache.spark:spark-avro_2.12:3.1.2 \
   --conf 'spark.serializer=org.apache.spark.serializer.KryoSerializer' \
   --conf 'spark.sql.extensions=org.apache.spark.sql.hudi.HoodieSparkSessionExtension'
   
   step2:  use alter statement to alter hoodie schema.   : alter table $tableName alter column col6 type long
   
   then your can play with the hoodie table which has a new schema.
   
   your can learn more about schema evoultion on  https://hudi.apache.org/docs/schema_evolution   
   more example can be find in org.apache.spark.sql.hudi.TestSpark3DDL.scala.  thanks
   
   


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