Hi,

> I've got a question concerning "insert select from". What is supposed to
> do a statement like this one : insert into a_table_name select * from

a_table_name (yes, with the same table name) according to the SQL standard ?

> I know this kind of statement has no particular interest; but I ask the

question because I don't

> have the same result using FB, Oracle, PostgreSQL and MySQL :
>
> - With Oracle and PostgreSQL the result is a table with twice the number

of rows and duplicated data,

Correct.

> - With MySQL, the request fails with error : ERROR 1066: Not unique

table/alias: 'a_table_name',

Sounds like an SQL parser error.

> -With FB 1.5 or 2.0, if the table is empty, then the result is an empty

table, else FB loops forever.

Known error.

With regards,

Martijn Tonies
Database Workbench - tool for InterBase, Firebird, MySQL, Oracle & MS SQL
Server
Upscene Productions
http://www.upscene.com
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