santoshsb commented on issue #5452:
URL: https://github.com/apache/hudi/issues/5452#issuecomment-1159671087

   @kazdy thanks for the followup, we had solved this issue at the root level 
of the schema by the code provided by @xiarixiaoyao. If you check the code (on 
the top of the post) it merges table columns into the incoming dataframe.
   As our schema was nested, we started facing similar issues with the nested 
columns which we have not resolved yet. And because we started adding null for 
the missing columns we faced this another issue, `Caused by: 
java.lang.RuntimeException: java.lang.String is not a valid external type for 
schema of array<string> at 
org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection.ValidateExternalType_2$(Unknown
 Source) at 
org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection.MapObjects_1$(Unknown
 Source) at 
org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection.createNamedStruct_0_1$(Unknown
 Source) at 
org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection.MapObjects_2$(Unknown
 Source) at 
org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection.writeFields_1_3$(Unknown
 Source) at 
org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProject
 ion.apply(Unknown Source) at 
org.apache.spark.sql.catalyst.encoders.ExpressionEncoder$Serializer.apply(ExpressionEncoder.scala:207)`
 


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