def test_operators_precedence(self):
self.assertParseTarget(
"SELECT a AND b OR c AND d;",
qp.Or(qp.And(qp.Column('a'), qp.Column('b')),
qp.And(qp.Column('c'), qp.Column('d'))))
self.assertParseTarget(
"SELECT a = 2 AND b != 3;",
qp.And(qp.Equal(qp.Column('a'), qp.Constant(2)),
qp.Not(qp.Equal(qp.Column('b'), qp.Constant(3)))))
self.assertParseTarget("SELECT not a AND b;",
qp.And(qp.Not(qp.Column('a')), qp.Column('b')))
self.assertParseTarget(
"SELECT a + b AND c - d;",
qp.And(qp.Add(qp.Column('a'), qp.Column('b')),
qp.Sub(qp.Column('c'), qp.Column('d'))))
self.assertParseTarget(
"SELECT a * b + c / d - 3;",
qp.Sub(
qp.Add(qp.Mul(qp.Column(name='a'), qp.Column(name='b')),
qp.Div(qp.Column(name='c'), qp.Column(name='d'))),
qp.Constant(value=3)))
self.assertParseTarget(
"SELECT 'orange' IN tags AND 'bananas' IN tags;",
qp.And(qp.Contains(qp.Constant('orange'), qp.Column('tags')),
qp.Contains(qp.Constant('bananas'), qp.Column('tags'))))
def test_expr_function__and_plus_minus(self):
self.assertParse(
qSelect(qp.Wildcard(),
where_clause=qp.And(qp.Add(qp.Column('a'), qp.Column('b')),
qp.Sub(qp.Column('c'),
qp.Column('d')))),
"SELECT * WHERE a + b AND c - d;")
def test_expr_numerical(self):
expected = qSelect(
[qp.Target(qp.Add(qp.Constant(2), qp.Constant(3)), None)])
self.assertParse(expected, "SELECT 2+(3);")
expected = qSelect(
[qp.Target(qp.Sub(qp.Constant(2), qp.Constant(3)), None)])
self.assertParse(expected, "SELECT 2-(3);")
def test_expr_function__mul_div_plus_minus(self):
self.assertParse(
qSelect(qp.Wildcard(),
where_clause=qp.Sub(
qp.Add(
qp.Mul(qp.Column(name='a'), qp.Column(name='b')),
qp.Div(qp.Column(name='c'), qp.Column(name='d'))),
qp.Constant(value=3))),
"SELECT * WHERE a * b + c / d - 3;")
def test_expressions(self):
# comparison operators
self.assertParseTarget("SELECT a = 42;",
qp.Equal(qp.Column('a'), qp.Constant(42)))
self.assertParseTarget(
"SELECT a != 42;", qp.Not(qp.Equal(qp.Column('a'),
qp.Constant(42))))
self.assertParseTarget("SELECT a > 42;",
qp.Greater(qp.Column('a'), qp.Constant(42)))
self.assertParseTarget("SELECT a >= 42;",
qp.GreaterEq(qp.Column('a'), qp.Constant(42)))
self.assertParseTarget("SELECT a < 42;",
qp.Less(qp.Column('a'), qp.Constant(42)))
self.assertParseTarget("SELECT a <= 42;",
qp.LessEq(qp.Column('a'), qp.Constant(42)))
self.assertParseTarget("SELECT a ~ 'abc';",
qp.Match(qp.Column('a'), qp.Constant('abc')))
self.assertParseTarget(
"SELECT a != 42;", qp.Not(qp.Equal(qp.Column('a'),
qp.Constant(42))))
self.assertParseTarget("SELECT not a;", qp.Not(qp.Column('a')))
self.assertParseTarget("SELECT a IS NULL;", qp.IsNull(qp.Column('a')))
self.assertParseTarget("SELECT a IS NOT NULL;",
qp.IsNotNull(qp.Column('a')))
# bool expressions
self.assertParseTarget("SELECT a AND b;",
qp.And(qp.Column('a'), qp.Column('b')))
self.assertParseTarget("SELECT a OR b;",
qp.Or(qp.Column('a'), qp.Column('b')))
self.assertParseTarget("SELECT NOT a;", qp.Not(qp.Column('a')))
# math expressions with identifiers
self.assertParseTarget("SELECT a * b;",
qp.Mul(qp.Column('a'), qp.Column('b')))
self.assertParseTarget("SELECT a / b;",
qp.Div(qp.Column('a'), qp.Column('b')))
self.assertParseTarget("SELECT a + b;",
qp.Add(qp.Column('a'), qp.Column('b')))
self.assertParseTarget("SELECT a+b;",
qp.Add(qp.Column('a'), qp.Column('b')))
self.assertParseTarget("SELECT a - b;",
qp.Sub(qp.Column('a'), qp.Column('b')))
self.assertParseTarget("SELECT a-b;",
qp.Sub(qp.Column('a'), qp.Column('b')))
self.assertParseTarget("SELECT +a;", qp.Column('a'))
self.assertParseTarget("SELECT -a;", qp.Neg(qp.Column('a')))
# math expressions with numerals
self.assertParseTarget("SELECT 2 * 3;",
qp.Mul(qp.Constant(2), qp.Constant(3)))
self.assertParseTarget("SELECT 2 / 3;",
qp.Div(qp.Constant(2), qp.Constant(3)))
self.assertParseTarget("SELECT 2+(3);",
qp.Add(qp.Constant(2), qp.Constant(3)))
self.assertParseTarget("SELECT (2)-3;",
qp.Sub(qp.Constant(2), qp.Constant(3)))
self.assertParseTarget("SELECT 2 + 3;",
qp.Add(qp.Constant(2), qp.Constant(3)))
self.assertParseTarget("SELECT 2+3;",
qp.Add(qp.Constant(2), qp.Constant(3)))
self.assertParseTarget("SELECT 2 - 3;",
qp.Sub(qp.Constant(2), qp.Constant(3)))
self.assertParseTarget("SELECT 2-3;",
qp.Sub(qp.Constant(2), qp.Constant(3)))
self.assertParseTarget("SELECT +2;", qp.Constant(2))
self.assertParseTarget("SELECT -2;", qp.Constant(-2))
# silly, fails at compile time
self.assertParseTarget("SELECT -'abc';", qp.Neg(qp.Constant('abc')))
# functions
self.assertParseTarget("SELECT random();", qp.Function('random', []))
self.assertParseTarget("SELECT min(a);",
qp.Function('min', [qp.Column('a')]))
self.assertParseTarget(
"SELECT min(a, b);",
qp.Function('min', [qp.Column('a'), qp.Column('b')]))
def test_expr_sub(self):
expected = qSelect(
[qp.Target(qp.Sub(qp.Column('a'), qp.Column('b')), None)])
self.assertParse(expected, "SELECT a - b;")
self.assertParse(expected, "SELECT a-b;")