SQLAlchemy Conjunction with Parentheses -


i trying produce below sql in sqlalchemy core. not able parentheses in conjunction , or appear.

select member t1  inner join member t2   on (         (           t1.first_name = t2.last_name ,            t1.last_name = t2.first_name ,            t1.dob = t2.dob         )         or (              t1.last_name = t2.last_name ,               t1.first_name = t2.first_name ,               t1.dob = t2.dob            )     ) group t2.id

the sqlalchemy core statement using is:

selstmt = select([t1]).select_from(     t1.join(             t2, or_(                     and_(                          t1.c.first_name == t2.c.last_name,                          t1.c.last_name == t2.c.first_name,                          t1.c.dob == t2.c.dob                          ),                     and_(                          t1.c.last_name == t2.c.last_name,                          t1.c.first_name == t2.c.first_name,                          t1.c.dob == t2.c.dob                          )                     )             )         ).group_by(t2.c.id)

the resulting sql code is:

select t1     t1      join t2 on          t1.first_name = t2.last_name ,          t1.last_name = t2.first_name ,          t1.dob = t2.dob or          t1.last_name = t2.last_name ,          t1.first_name = t2.first_name ,          t1.dob = t2.dob      group t2.id

since parentheses not included logic not correct. how parentheses in conjunctions?

apparently , operation has higher precedence on or. therefore in case parentheses not required.


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