Re: No Indexes??
Ran some tests - here's my observations:-
o Can an ARCHIVE table be used in a MERGE table union?
I think the answer would have to be yes - but only if all tables in the union (including the merge definition) had no indexes ... because the ARCHIVE engine doesn't support indexes.
o Auto-increment fields are not supported. I ran an "alter table type-archive" on a MYISAM table and got an error that you cannot have auto_increment in the table.
o No indexes - a problem?
Maybe not. If indexes are used for speed on a MYIASM table, then they appear not to be needed in the ARCHIVE format because the small footprint of the table (75% less space in my tests) makes up for the need to read the entire table. Still... !
o No indexes - a problem (part 2) ?
Maybe yes - if you use indexes as a primary key. Can't have any indexes - which means you can't have a primary key either. "INSERTS" are allowed - so it's not like an ARCHIVE table is meant for read-only purposes.
The plot thickens ;)
Dean
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