PostgreSQL 9.5: Insert IF not Exists, Update IF Exists (Insert ON CONFLICT option) PostgreSQL 9.4: Using FILTER CLAUSE, multiple COUNT(*) in one SELECT Query for Different Groups PostgreSQL: Allow single NULL for UNIQUE Constraint Column NOT NULL Constraint − Ensures that a column cannot have NULL value. INSERT INTO journals (ext_ids, title) VALUES ('{"nlmid": "000"}', 'blah') ON CONFLICT ON CONSTRAINT idx_nlmid_journal DO NOTHING; where idx_nlmid_journal is unique index on jsonb field created like this PRIMARY Key − Uniquely identifies each row/record in a database table. Added support for PostgreSQL ON CONFLICT .. ON CONSTRAINT .. ON CONSTRAINT .. lukaseder added a commit that referenced this issue Dec 18, 2017 Because PostgreSQL can not infer it from the values, you need the index_predicate. I'm trying to use new Postgresql 9.5 upsert feature. When checking constraints, PostgreSQL also checks rows that would normally not be visible to the current transaction. My query is this. PostgreSQL - insert/update violates foreign key constraints. The problems are 'UNIQUE' near collum and in constraint? With 2 constraints we have 4 permutations, i.e. But for some reason my query saying constraint doesn't exist (when it does). UNIQUE Constraint − Ensures that all values in a column are different. Given the above, you may wonder if regular constraints are subject to the same problem. When doing upserts in PostgreSQL 9.5+ you must refer to the excluded data (that which failed to insert) by the alias excluded.Also, the on conflict option must refer to the key: (pk_b) rather than (b).Eg. After all, this is a consequence of PostgreSQL’s multi-version concurrency control (MVCC). It seems that the database cannot identify the unique constraint for (user_id, group_id). ON CONFLICT refers to constraints that can either be specified using a inference clause (by specifying the columns of a unique constraint) or by naming a unique or exclusion constraint. i add the constraint after, because the 'ON CONFLICT' can't take multiple collums, ... Postgres multiple joins slow query, how to store default child record. If first constraint violates but not second, treat it as an email address update AND increment the billing, if any If second constraint violates, reject the row since we only allow one userid per person. Postgres complex insert or update with 2 unique constraints. The following are commonly used constraints available in PostgreSQL. O(2^N) permutations. DO NOTHING avoids the constraint violation, without touching the pre-existing row. ... Postgresql 10 There is no unique or exclusion constraint matching the ON CONFLICT specification. BUG #16714: INSERT ON CONFLICT DO UPDATE fails to infer constraint if it's not at top-level partition The following bug has been logged on the website: Bug reference: 16714 Logged by: Andy S Email address: [hidden email] PostgreSQL version: 11.2 Operating system: Gentoo Linux … Avoid naming a constraint directly when using ON CONFLICT DO UPDATE PostgreSQL 9.5 will have support for a feature that is popularly known as "UPSERT" - the ability to either insert or update a row according to whether an existing row with the same key exists. insert into table_b (pk_b, b) select pk_a,a from table_a on conflict (pk_b) do update set b=excluded.b; FOREIGN Key − Constrains data based on columns in other tables. Please check if it is defined correctly and try using the constraint name directly:... on conflict on constraint