Add support for ON CONFLICT in InsertStmt

[pablomatiasgomez]

Add support for ON CONFLICT in InsertStmt

See section ON CONFLICT Clause in https://www.postgresql.org/docs/current/sql-insert.html for more reference

cc @santileira @taylorchu

[pablomatiasgomez]

@taylorchu Thanks for merging the other PR! this one is ready for review too, not sure why I cannot tag you as reviewer

[pablomatiasgomez]

@taylorchu do you think you will be able to review these? Sorry, I really don't want to be super noisy, I just want to know if I should wait for reviews or not 😅

[tinyzimmer]

Is there anything in particular holding up the merge of this? As a casual observer the code seems fine though my only gripe is that the expected input of action is a bit ambiguous looking from the outside in.

[pablomatiasgomez]

Is there anything in particular holding up the merge of this? As a casual observer the code seems fine though my only gripe is that the expected input of action is a bit ambiguous looking from the outside in.

We didn't get any more answers so we decided to keep our own fork with more features, including this one. You can check it out here: https://github.com/embrace-io/dbr