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. But for some reason my query saying constraint doesn't exist (when it does). My query is this. UNIQUE Constraint − Ensures that all values in a column are different. 0. 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. PostgreSQL - insert/update violates foreign key constraints. 1. With 2 constraints we have 4 permutations, i.e. I'm trying to use new Postgresql 9.5 upsert feature. The problems are 'UNIQUE' near collum and in constraint? PRIMARY Key − Uniquely identifies each row/record in a database table. When checking constraints, PostgreSQL also checks rows that would normally not be visible to the current transaction. 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 0. update value in row based on value in another row. After all, this is a consequence of PostgreSQL’s multi-version concurrency control (MVCC). Given the above, you may wonder if regular constraints are subject to the same problem. NOT NULL Constraint − Ensures that a column cannot have NULL value. FOREIGN Key − Constrains data based on columns in other tables. O(2^N) permutations. postgresql 9.5.1 構文 insert into テーブル名 values ('値1', '値2', ...) on conflict on constraint 制約名 do update set カラム1='値', カラム2='値', ...; insertとupdateでon conflict on constraintを挟まれています。 Added support for PostgreSQL ON CONFLICT .. ON CONSTRAINT .. ON CONSTRAINT .. lukaseder added a commit that referenced this issue Dec 18, 2017 ... Postgresql 10 There is no unique or exclusion constraint matching the ON CONFLICT specification. 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. The following are commonly used constraints available in PostgreSQL. Postgres complex insert or update with 2 unique constraints. 13. 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 … DO NOTHING avoids the constraint violation, without touching the pre-existing row. It seems that the database cannot identify the unique constraint for (user_id, group_id). 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. 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 insert into table_b (pk_b, b) select pk_a,a from table_a on conflict (pk_b) do update set b=excluded.b; 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. Because PostgreSQL can not infer it from the values, you need the index_predicate. Please check if it is defined correctly and try using the constraint name directly:... on conflict on constraint