# \#udt

**URL:** https://forum.scylladb.com/tag/udt/146.md

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## [Removing and adding a column with the same name, getting an error](https://forum.scylladb.com/t/removing-and-adding-a-column-with-the-same-name-getting-an-error/5118)

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**Author:** [@Guy](https://forum.scylladb.com/u/Guy)\
**Replies:** 0\
**Last updated:** [October 5, 2025, 5:12am UTC](https://forum.scylladb.com/t/removing-and-adding-a-column-with-the-same-name-getting-an-error/5118 "2025-10-05T05:12:18Z")

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## [How to define an inner class as a UDT in @Entity and use the UDT?](https://forum.scylladb.com/t/how-to-define-an-inner-class-as-a-udt-in-entity-and-use-the-udt/5001)

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**Author:** [@user1](https://forum.scylladb.com/u/user1)\
**Replies:** 1\
**Last updated:** [July 28, 2025, 6:04pm UTC](https://forum.scylladb.com/t/how-to-define-an-inner-class-as-a-udt-in-entity-and-use-the-udt/5001 "2025-07-28T18:04:05Z")

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How to define an inner class as a UDT in @Entity and use the UDT? com.scylladb java-driver-core 4.19.0.1 \<dependency\> \<groupId\>com.scylladb\</groupId\> \<…

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## [Duplicate User Define data type list value while restoring data using sstable loader](https://forum.scylladb.com/t/duplicate-user-define-data-type-list-value-while-restoring-data-using-sstable-loader/4985)

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**Author:** [@Ranjeet\_Kumar](https://forum.scylladb.com/u/Ranjeet_Kumar)\
**Replies:** 1\
**Last updated:** [July 16, 2025, 3:40am UTC](https://forum.scylladb.com/t/duplicate-user-define-data-type-list-value-while-restoring-data-using-sstable-loader/4985 "2025-07-16T03:40:43Z")

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Installation details #ScyllaDB version: 5.2 #Cluster size:12 os (RHEL/CentOS/Ubuntu/AWS AMI):Amazon Linux 2 We could see data corruption (Duplicate list Value) for user define data type while restoring data using ss…

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## [Regarding selecting map index from a table](https://forum.scylladb.com/t/regarding-selecting-map-index-from-a-table/4197)

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**Author:** [@Neeraj\_Chatterjee](https://forum.scylladb.com/u/Neeraj_Chatterjee)\
**Replies:** 2\
**Last updated:** [April 15, 2025, 10:41am UTC](https://forum.scylladb.com/t/regarding-selecting-map-index-from-a-table/4197 "2025-04-15T10:41:11Z")

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I am using this version : \[cqlsh 6.1.0 | Cassandra 3.0.8 | CQL spec 3.3.1 | Native protocol v4\] and have this following udt and table schema : CREATE TYPE notificationstore.fcm\_details ( app\_version\_code int, …

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## [Using DynamoDB Alernator and CQL together, data modeling and performance](https://forum.scylladb.com/t/using-dynamodb-alernator-and-cql-together-data-modeling-and-performance/3224)

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**Author:** [@Guy](https://forum.scylladb.com/u/Guy)\
**Replies:** 0\
**Last updated:** [November 24, 2024, 5:07am UTC](https://forum.scylladb.com/t/using-dynamodb-alernator-and-cql-together-data-modeling-and-performance/3224 "2024-11-24T05:07:05Z")

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## [Creating an index on User Defined Types](https://forum.scylladb.com/t/creating-an-index-on-user-defined-types/2178)

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**Author:** [@Guy](https://forum.scylladb.com/u/Guy)\
**Replies:** 0\
**Last updated:** [June 18, 2024, 8:42am UTC](https://forum.scylladb.com/t/creating-an-index-on-user-defined-types/2178 "2024-06-18T08:42:42Z")

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