> Schema Compatibility problem between version 1.3.0 and 1.4.0
> ------------------------------------------------------------
>
> Key: CARBONDATA-2729
> URL:
https://issues.apache.org/jira/browse/CARBONDATA-2729> Project: CarbonData
> Issue Type: Bug
> Components: file-format
> Affects Versions: 1.4.0
> Reporter: Mohammad Shahid Khan
> Assignee: Mohammad Shahid Khan
> Priority: Major
> Fix For: 1.5.0, 1.4.1
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> The table schema created with 1.3 is not compatible with 1.4.0.
> Steps:
> Do the below operation on hive meta store.
> 1. Create table and load data in 1.3 version.
> {code:java}
> spark.sql("create database carbonversion_1_1");
> spark.sql("use carbonversion_1_1");
> spark.sql("""create table testIntType (c1 string,c2 int) STORED BY 'org.apache.carbondata.format'""")
> spark.sql("insert into testIntType select 'a',200"){code}
> 2. Switch to 1.4 version and create data map on the table created in step 1.
> {code:java}
> spark.sql("use carbonversion_1_3");
> spark.sql("create datamap dm8 on table testinttype3 using 'preaggregate' as select c1, sum(c2) from testinttype3 group by c1")
> {code}
> Stack trace:
> {code:java}
> Exception in thread "main" java.lang.NullPointerException
> at org.apache.carbondata.core.metadata.converter.ThriftWrapperSchemaConverterImpl.fromWrapperToExternalSchemaEvolution(ThriftWrapperSchemaConverterImpl.java:87)
> at org.apache.carbondata.core.metadata.converter.ThriftWrapperSchemaConverterImpl.fromWrapperToExternalTableSchema(ThriftWrapperSchemaConverterImpl.java:277)
> at org.apache.carbondata.core.metadata.converter.ThriftWrapperSchemaConverterImpl.fromWrapperToExternalTableInfo(ThriftWrapperSchemaConverterImpl.java:310)
> at org.apache.spark.sql.hive.CarbonHiveMetaStore.getThriftTableInfo(CarbonHiveMetaStore.scala:101){code}
Locked
