> For the complete documentation index, see [llms.txt](https://upsolver.gitbook.io/content/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://upsolver.gitbook.io/content/reference-1/sql-commands/iceberg-tables.md).

# Iceberg Tables

When you create an Apache Iceberg table using Upsolver, we automatically manage and optimize your table for you, removing the need for manual intervention. The syntax for creating, altering, and deleting your Iceberg tables is very similar to creating an Upsolver data lake table, with some minor differences in syntax and options. 

This section provides the SQL syntax for creating, altering, and deleting Iceberg tables.  

* [Upsolver Managed Tables](/content/reference-1/sql-commands/iceberg-tables/upsolver-managed-tables.md):

  * [CREATE ICEBERG TABLE](/content/reference-1/sql-commands/iceberg-tables/upsolver-managed-tables/create-iceberg-table.md)
  * [ALTER ICEBERG TABLE](/content/reference-1/sql-commands/iceberg-tables/upsolver-managed-tables/alter-iceberg-table.md)
  * [DROP ICEBERG TABLE](/content/reference-1/sql-commands/iceberg-tables/upsolver-managed-tables/drop-iceberg-table.md)

* [External Iceberg Tables](/content/reference-1/sql-commands/iceberg-tables/external-iceberg-tables.md):

  * [CREATE EXTERNAL ICEBERG TABLE](/content/reference-1/sql-commands/iceberg-tables/external-iceberg-tables/create-external-iceberg-table.md)
  * [DROP EXTERNAL ICEBERG TABLE](/content/reference-1/sql-commands/iceberg-tables/external-iceberg-tables/drop-external-iceberg-table.md)

* [Mirror Iceberg Tables:](/content/reference-1/sql-commands/iceberg-tables/mirror-iceberg-tables.md)

* [CREATE MIRROR](/content/reference-1/sql-commands/iceberg-tables/mirror-iceberg-tables/create-mirror.md)

* [PAUSE / RESUME MIRROR](/content/reference-1/sql-commands/iceberg-tables/mirror-iceberg-tables/pause-resume-mirror.md)

* [DROP MIRROR](/content/reference-1/sql-commands/iceberg-tables/mirror-iceberg-tables/drop-mirror.md)

## Limitations of Iceberg Tables in Upsolver

### Data Type Limitations

1. Writing to Iceberg tables supports the following data types:
   1. Boolean
   2. String
   3. Long
   4. Double
   5. Date
   6. Timestamp - only millisecond precision is currently supported
   7. List
   8. Struct

### Table Limitations

1. Only tables using Parquet files are supported


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://upsolver.gitbook.io/content/reference-1/sql-commands/iceberg-tables.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.