A reader account is intended primarily for querying data shared by the provider of the account.

Adding new data to the account and/or updating shared data in the account is not supported.

Changing the configuration of virtual warehouses is also not permitted as those resources are owned and managed by the provider of the account which is sharing the data.

https://docs.snowflake.com/en/user-guide/intro-editions.html

https://docs.snowflake.com/en/user-guide/data-unloadsnowflake.html#:~:text=Your%20User%20Stage-,Use%20the%20COPY%20INTO%20command%20to%20unload%20all%20the,more%20files%20in%20your%20stage.

All Snowflake-managed keys are automatically rotated by Snowflake when they are more than 30 days old. Active keys are retired, and new keys are created. When Snowflake determines the retired key is no longer needed, the key is automatically destroyed.

https://docs.snowflake.com/en/user-guide/security-encryptionmanage.html#:~:text=All%20Snowflake%2Dmanaged%20keys%20are,the%20key%20is%20automatically%20destroyed.

Characteristics of a VARIANT

A VARIANT can store a value of any other type, including OBJECT and ARRAY. The maximum length of a VARIANT is 16 MB.

https://docs.snowflake.com/en/sql-reference/data-types-semistructured.html#:~:text=VARIANT-,Characteristics%20of%20a%20VARIANT,a%20VARIANT%20is%2016%20MB.

https://docs.snowflake.com/en/user-guide/data-load-snowpipe-intro.html

https://docs.snowflake.com/en/user-guide/data-load-considerations-prepare.html