Hi, I have a scenario with a large table and I'm trying to insert it via a COPY command with a csv file.
Everything works, but sometimes my source .csv file has duplicated data in the previously fulfilled table. If I add a check constraint and try to run the COPY command I have an error that stops the whole insertion. I've tried to put the data in a tmp table and fill the main using distinct this way (the fields and names are just examples): INSERT INTO final_table values (name, document) SELECT DISTINCT name, document FROM tmp_TABLE t1 WHERE NOT EXISTS ( SELECT 1 FROM final_table t2 WHERE (t2.name, t2.document) IS NOT DISTINCT FROM (t1.name, t1.document)) The problem is that my final_table is a large (and partitioned) table and this query is taking a long time to execute. Someone have any idea (really guys anything would be great) how to solve this situation? I need to ignore duplicates instead to have some error. I'm using* PostgreSQL 9.4* so I can't use "ON CONFLICT" and upgrade is not an option. Thanks and Kind Regards! Leandro Guimarães
