Re^4: Create parallel database handles or SQL statements for multi-threaded/process access to Postgres DB using DBI, DBD::Pg and Parallel::ForkManager

Thanks. I think I understand what that does, but the unique requirement is not on just one field, it is on the whole record. That is, the collection of all field values comprises a UNIQUE combination, and there must not be any other rows with that exact same combination of values.

Comment on Re^4: Create parallel database handles or SQL statements for multi-threaded/process access to Postgres DB using DBI, DBD::Pg and Parallel::ForkManager

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Re^5: Create parallel database handles or SQL statements for multi-threaded/process access to Postgres DB using DBI, DBD::Pg and Parallel::ForkManager by 1nickt (Canon) on May 08, 2020 at 16:33 UTC
Hi again, Add to your DB schema: `unique key all_cols_uk (every, column, name, in, the, table),` [download] https://www.w3schools.com/sql/sql_unique.asp Hope this helps! The way forward always starts with a minimal test.	[reply] [d/l]
Re^6: Create parallel database handles or SQL statements for multi-threaded/process access to Postgres DB using DBI, DBD::Pg and Parallel::ForkManager by erix (Prior) on May 08, 2020 at 18:52 UTC
On that page postgres is not mentioned; in postgresql-SQL, that'd become, I think: `create unique index all_cols_uk on tablename (every, column, name, in, + the, table) ;` [download] See: CREATE INDEX in the fine manual	[reply] [d/l]


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