Can an INSERT operation result in a deadlock?

Question

Assuming:

• I am using REPEATABLE_READ or SERIALIZABLE transaction isolation (locks get retained every time I access a row)
• We are talking about multiple th

Answer 1

Let us assume you have two relations A and B and two users X and Y. Table A is WRITE Locked by user X and Table B is WRITE Locked by Y. Then the following query will give you a dead lock if used by both the users X and Y.

Select * from A,B

So clearly a Select operation can cause a deadlock if join operations involving more than one table is a part of it. Usually Insert and Delete operations involve single relations. So they may not cause deadlock.