Bulk upsert using on_conflict_do_update

[Katie Wurman]

What's the proper syntax for doing a bulk upsert using the new on_conflict_do_update clause? In postgres there is apparently a special table called 'excluded' which contains all the rows to be inserted, so the raw query looks like this: 

INSERT into MYTABLE(col1,col2,col3) VALUES (a,b,c),(d,e,f)

ON CONFLICT (col1) DO

UPDATE SET

col2 = excluded.col2

col3 = excluded.col3

Does sqlalchemy support bulk upserts like this yet? 

[mike bayer]

that is now supported using a special PG specific Insert object:


http://docs.sqlalchemy.org/en/latest/dialects/postgresql.html?highlight=conflict#insert-on-conflict-upsert

examples of how to use "excluded" are present in that documentation section.



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