def test_join_table_schema_qualified():
tables = extract_tables(
"SELECT * FROM abc.def x JOIN ghi.jkl y ON x.id = y.num")
assert tables == [("abc", "def", "x"), ("ghi", "jkl", "y")]
def test_empty_string():
tables = extract_tables("")
assert tables == []
def test_join_table():
tables = extract_tables("SELECT * FROM abc a JOIN def d ON a.id = d.num")
assert sorted(tables) == [(None, "abc", "a"), (None, "def", "d")]
def test_simple_update_table():
tables = extract_tables("update abc set id = 1")
assert tables == [(None, "abc", None)]
def test_simple_update_table_with_schema():
tables = extract_tables("update abc.def set id = 1")
assert tables == [("abc", "def", None)]
def test_simple_insert_single_table():
tables = extract_tables('insert into abc (id, name) values (1, "def")')
# sqlparse mistakenly assigns an alias to the table
# assert tables == [(None, 'abc', None)]
assert tables == [(None, "abc", "abc")]
def test_simple_insert_single_table_schema_qualified():
tables = extract_tables('insert into abc.def (id, name) values (1, "def")')
assert tables == [("abc", "def", None)]
def test_select_with_hanging_comma_multiple_tables():
tables = extract_tables("select a, from abc, def")
assert sorted(tables) == [(None, "abc", None), (None, "def", None)]
def test_select_with_hanging_period_multiple_tables():
tables = extract_tables("SELECT t1. FROM tabl1 t1, tabl2 t2")
assert sorted(tables) == [(None, "tabl1", "t1"), (None, "tabl2", "t2")]
def test_simple_select_with_cols_multiple_tables_with_schema():
tables = extract_tables("select a,b from abc.def, def.ghi")
assert sorted(tables) == [("abc", "def", None), ("def", "ghi", None)]
def test_select_with_hanging_comma_single_table():
tables = extract_tables("select a, from abc")
assert tables == [(None, "abc", None)]
def test_simple_select_with_cols_multiple_tables():
tables = extract_tables("select a,b from abc, def")
assert sorted(tables) == [(None, "abc", None), (None, "def", None)]
def test_simple_select_with_cols_single_table_schema_qualified():
tables = extract_tables("select a,b from abc.def")
assert tables == [("abc", "def", None)]
def test_simple_select_with_cols_single_table():
tables = extract_tables("select a,b from abc")
assert tables == [(None, "abc", None)]
def test_simple_select_multiple_tables_schema_qualified():
tables = extract_tables("select * from abc.def, ghi.jkl")
assert sorted(tables) == [("abc", "def", None), ("ghi", "jkl", None)]
def test_join_as_table():
tables = extract_tables("SELECT * FROM my_table AS m WHERE m.a > 5")
assert tables == [(None, "my_table", "m")]