when the IS operator is in the WHERE clause and the operands are from
opposite sides of a LEFT JOIN.
FossilOrigin-Name: 4541688b3f56f5cd3d5b299594b58c577ad633bb
The changes in where.c and in the WhereLevel.aInLoop structure are
not strictly necessary to fix this problem - they just make the code
easier to read. Only the change in OP_Next/OP_Prev operator of vdbe.c
is required. (CVS 3735)
FossilOrigin-Name: 26348556d824c032851e409ac510cddb55c200bf
handles a LEFT JOIN where the a term from the right table of the join uses
an IS NULL constraint. Ticket #2177. This check-in also adds the new test
cases that were suppose to have been added with (3494) but which were
mistakenly omitted. (CVS 3595)
FossilOrigin-Name: 335863e4d16113fb9ecebce35d2db043771d98b1
