SNOWFLAKE: Cannot read temporary tables with IDataReader

Question

Is it possible to read temporary tables using IDataReader? I am connecting to Snowflake through ODBC.

//e.g.
CREATE TEMPORARY TABLE TEMPTABLE1 (ID INT);

sting query = "SELECT * FROM DB1.INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE = 'LOCAL TEMPORARY' OR TABLE_TYPE = 'GLOBAL TEMPORARY' OR TABLE_TYPE = 'TEMPORARY' OR TABLE_TYPE = 'VOLATILE'";
using (IDataReader reader = Connection.Query(query, null))
{
    while (reader.Read()) {...}
}

Reader is empty, did I make mistake somewhere, or there is some technical limitations on this one?

Answer 1

You are creating the temporary table and THEN you are connecting with IDataReader afterwards. Thats why you don't see the table - its another session and temporary tables only exist within the session in which they were created.

https://docs.snowflake.com/en/user-guide/tables-temp-transient.html#temporary-tables

Answer 2

Temporary tables are visible in context of the same session.

Optional Parameters :

 TEMP[ORARY] | LOCAL TEMP[ORARY] | GLOBAL TEMP[ORARY] | VOLATILE

Specifies that the table is temporary. A temporary table persists only for the duration of the user session in which it was created and is not visible to other users.