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import unittest
from unittest.mock import patch
from sqlglot import Parser, exp, parse, parse_one
from sqlglot.errors import ErrorLevel, ParseError
from tests.helpers import assert_logger_contains
class TestParser(unittest.TestCase):
def test_parse_empty(self):
self.assertIsNone(parse_one(""))
def test_parse_into(self):
self.assertIsInstance(parse_one("left join foo", into=exp.Join), exp.Join)
self.assertIsInstance(parse_one("int", into=exp.DataType), exp.DataType)
self.assertIsInstance(parse_one("array<int>", into=exp.DataType), exp.DataType)
def test_parse_into_error(self):
expected_message = "Failed to parse into [<class 'sqlglot.expressions.From'>]"
expected_errors = [
{
"description": "Invalid expression / Unexpected token",
"line": 1,
"col": 1,
"start_context": "",
"highlight": "SELECT",
"end_context": " 1;",
"into_expression": exp.From,
}
]
with self.assertRaises(ParseError) as ctx:
parse_one("SELECT 1;", "sqlite", [exp.From])
self.assertEqual(str(ctx.exception), expected_message)
self.assertEqual(ctx.exception.errors, expected_errors)
def test_parse_into_errors(self):
expected_message = "Failed to parse into [<class 'sqlglot.expressions.From'>, <class 'sqlglot.expressions.Join'>]"
expected_errors = [
{
"description": "Invalid expression / Unexpected token",
"line": 1,
"col": 1,
"start_context": "",
"highlight": "SELECT",
"end_context": " 1;",
"into_expression": exp.From,
},
{
"description": "Invalid expression / Unexpected token",
"line": 1,
"col": 1,
"start_context": "",
"highlight": "SELECT",
"end_context": " 1;",
"into_expression": exp.Join,
},
]
with self.assertRaises(ParseError) as ctx:
parse_one("SELECT 1;", "sqlite", [exp.From, exp.Join])
self.assertEqual(str(ctx.exception), expected_message)
self.assertEqual(ctx.exception.errors, expected_errors)
def test_column(self):
columns = parse_one("select a, ARRAY[1] b, case when 1 then 1 end").find_all(exp.Column)
assert len(list(columns)) == 1
self.assertIsNotNone(parse_one("date").find(exp.Column))
def test_float(self):
self.assertEqual(parse_one(".2"), parse_one("0.2"))
def test_unary_plus(self):
self.assertEqual(parse_one("+15"), exp.Literal.number(15))
def test_table(self):
tables = [t.sql() for t in parse_one("select * from a, b.c, .d").find_all(exp.Table)]
self.assertEqual(tables, ["a", "b.c", "d"])
def test_union_order(self):
self.assertIsInstance(parse_one("SELECT * FROM (SELECT 1) UNION SELECT 2"), exp.Union)
def test_select(self):
self.assertIsNotNone(parse_one("select 1 natural"))
self.assertIsNotNone(parse_one("select * from (select 1) x order by x.y").args["order"])
self.assertIsNotNone(
parse_one("select * from x where a = (select 1) order by x.y").args["order"]
)
self.assertEqual(len(parse_one("select * from (select 1) x cross join y").args["joins"]), 1)
self.assertEqual(
parse_one("""SELECT * FROM x CROSS JOIN y, z LATERAL VIEW EXPLODE(y)""").sql(),
"""SELECT * FROM x, z CROSS JOIN y LATERAL VIEW EXPLODE(y)""",
)
def test_command(self):
expressions = parse("SET x = 1; ADD JAR s3://a; SELECT 1", read="hive")
self.assertEqual(len(expressions), 3)
self.assertEqual(expressions[0].sql(), "SET x = 1")
self.assertEqual(expressions[1].sql(), "ADD JAR s3://a")
self.assertEqual(expressions[2].sql(), "SELECT 1")
def test_transactions(self):
expression = parse_one("BEGIN TRANSACTION")
self.assertIsNone(expression.this)
self.assertEqual(expression.args["modes"], [])
self.assertEqual(expression.sql(), "BEGIN")
expression = parse_one("START TRANSACTION", read="mysql")
self.assertIsNone(expression.this)
self.assertEqual(expression.args["modes"], [])
self.assertEqual(expression.sql(), "BEGIN")
expression = parse_one("BEGIN DEFERRED TRANSACTION")
self.assertEqual(expression.this, "DEFERRED")
self.assertEqual(expression.args["modes"], [])
self.assertEqual(expression.sql(), "BEGIN")
expression = parse_one(
"START TRANSACTION READ WRITE, ISOLATION LEVEL SERIALIZABLE", read="presto"
)
self.assertIsNone(expression.this)
self.assertEqual(expression.args["modes"][0], "READ WRITE")
self.assertEqual(expression.args["modes"][1], "ISOLATION LEVEL SERIALIZABLE")
self.assertEqual(expression.sql(), "BEGIN")
expression = parse_one("BEGIN", read="bigquery")
self.assertNotIsInstance(expression, exp.Transaction)
self.assertIsNone(expression.expression)
self.assertEqual(expression.sql(), "BEGIN")
def test_identify(self):
expression = parse_one(
"""
SELECT a, "b", c AS c, d AS "D", e AS "y|z'"
FROM y."z"
"""
)
assert expression.expressions[0].name == "a"
assert expression.expressions[1].name == "b"
assert expression.expressions[2].alias == "c"
assert expression.expressions[3].alias == "D"
assert expression.expressions[4].alias == "y|z'"
table = expression.args["from"].expressions[0]
assert table.this.name == "z"
assert table.args["db"].name == "y"
def test_multi(self):
expressions = parse(
"""
SELECT * FROM a; SELECT * FROM b;
"""
)
assert len(expressions) == 2
assert expressions[0].args["from"].expressions[0].this.name == "a"
assert expressions[1].args["from"].expressions[0].this.name == "b"
def test_expression(self):
ignore = Parser(error_level=ErrorLevel.IGNORE)
self.assertIsInstance(ignore.expression(exp.Hint, expressions=[""]), exp.Hint)
self.assertIsInstance(ignore.expression(exp.Hint, y=""), exp.Hint)
self.assertIsInstance(ignore.expression(exp.Hint), exp.Hint)
default = Parser(error_level=ErrorLevel.RAISE)
self.assertIsInstance(default.expression(exp.Hint, expressions=[""]), exp.Hint)
default.expression(exp.Hint, y="")
default.expression(exp.Hint)
self.assertEqual(len(default.errors), 3)
warn = Parser(error_level=ErrorLevel.WARN)
warn.expression(exp.Hint, y="")
self.assertEqual(len(warn.errors), 2)
def test_parse_errors(self):
with self.assertRaises(ParseError):
parse_one("IF(a > 0, a, b, c)")
with self.assertRaises(ParseError):
parse_one("IF(a > 0)")
with self.assertRaises(ParseError):
parse_one("WITH cte AS (SELECT * FROM x)")
def test_space(self):
self.assertEqual(
parse_one("SELECT ROW() OVER(PARTITION BY x) FROM x GROUP BY y").sql(),
"SELECT ROW() OVER (PARTITION BY x) FROM x GROUP BY y",
)
self.assertEqual(
parse_one(
"""SELECT * FROM x GROUP
BY y"""
).sql(),
"SELECT * FROM x GROUP BY y",
)
def test_missing_by(self):
with self.assertRaises(ParseError):
parse_one("SELECT FROM x ORDER BY")
def test_parameter(self):
self.assertEqual(parse_one("SELECT @x, @@x, @1").sql(), "SELECT @x, @@x, @1")
def test_var(self):
self.assertEqual(parse_one("SELECT @JOIN, @'foo'").sql(), "SELECT @JOIN, @'foo'")
def test_comments(self):
expression = parse_one(
"""
--comment1.1
--comment1.2
SELECT /*comment1.3*/
a, --comment2
b as B, --comment3:testing
"test--annotation",
c, --comment4 --foo
e, --
f -- space
FROM foo
"""
)
self.assertEqual(expression.comments, ["comment1.1", "comment1.2", "comment1.3"])
self.assertEqual(expression.expressions[0].comments, ["comment2"])
self.assertEqual(expression.expressions[1].comments, ["comment3:testing"])
self.assertEqual(expression.expressions[2].comments, None)
self.assertEqual(expression.expressions[3].comments, ["comment4 --foo"])
self.assertEqual(expression.expressions[4].comments, [""])
self.assertEqual(expression.expressions[5].comments, [" space"])
def test_type_literals(self):
self.assertEqual(parse_one("int 1"), parse_one("CAST(1 AS INT)"))
self.assertEqual(parse_one("int.5"), parse_one("CAST(0.5 AS INT)"))
self.assertEqual(
parse_one("TIMESTAMP '2022-01-01'").sql(), "CAST('2022-01-01' AS TIMESTAMP)"
)
self.assertEqual(
parse_one("TIMESTAMP(1) '2022-01-01'").sql(), "CAST('2022-01-01' AS TIMESTAMP(1))"
)
self.assertEqual(
parse_one("TIMESTAMP WITH TIME ZONE '2022-01-01'").sql(),
"CAST('2022-01-01' AS TIMESTAMPTZ)",
)
self.assertEqual(
parse_one("TIMESTAMP WITH LOCAL TIME ZONE '2022-01-01'").sql(),
"CAST('2022-01-01' AS TIMESTAMPLTZ)",
)
self.assertEqual(
parse_one("TIMESTAMP WITHOUT TIME ZONE '2022-01-01'").sql(),
"CAST('2022-01-01' AS TIMESTAMP)",
)
self.assertEqual(
parse_one("TIMESTAMP(1) WITH TIME ZONE '2022-01-01'").sql(),
"CAST('2022-01-01' AS TIMESTAMPTZ(1))",
)
self.assertEqual(
parse_one("TIMESTAMP(1) WITH LOCAL TIME ZONE '2022-01-01'").sql(),
"CAST('2022-01-01' AS TIMESTAMPLTZ(1))",
)
self.assertEqual(
parse_one("TIMESTAMP(1) WITHOUT TIME ZONE '2022-01-01'").sql(),
"CAST('2022-01-01' AS TIMESTAMP(1))",
)
self.assertEqual(parse_one("TIMESTAMP(1) WITH TIME ZONE").sql(), "TIMESTAMPTZ(1)")
self.assertEqual(parse_one("TIMESTAMP(1) WITH LOCAL TIME ZONE").sql(), "TIMESTAMPLTZ(1)")
self.assertEqual(parse_one("TIMESTAMP(1) WITHOUT TIME ZONE").sql(), "TIMESTAMP(1)")
self.assertEqual(parse_one("""JSON '{"x":"y"}'""").sql(), """CAST('{"x":"y"}' AS JSON)""")
self.assertIsInstance(parse_one("TIMESTAMP(1)"), exp.Func)
self.assertIsInstance(parse_one("TIMESTAMP('2022-01-01')"), exp.Func)
self.assertIsInstance(parse_one("TIMESTAMP()"), exp.Func)
self.assertIsInstance(parse_one("map.x"), exp.Column)
def test_pretty_config_override(self):
self.assertEqual(parse_one("SELECT col FROM x").sql(), "SELECT col FROM x")
with patch("sqlglot.pretty", True):
self.assertEqual(parse_one("SELECT col FROM x").sql(), "SELECT\n col\nFROM x")
self.assertEqual(parse_one("SELECT col FROM x").sql(pretty=True), "SELECT\n col\nFROM x")
@patch("sqlglot.parser.logger")
def test_comment_error_n(self, logger):
parse_one(
"""SUM
(
-- test
)""",
error_level=ErrorLevel.WARN,
)
assert_logger_contains(
"Required keyword: 'this' missing for <class 'sqlglot.expressions.Sum'>. Line 4, Col: 1.",
logger,
)
@patch("sqlglot.parser.logger")
def test_comment_error_r(self, logger):
parse_one(
"""SUM(-- test\r)""",
error_level=ErrorLevel.WARN,
)
assert_logger_contains(
"Required keyword: 'this' missing for <class 'sqlglot.expressions.Sum'>. Line 2, Col: 1.",
logger,
)
@patch("sqlglot.parser.logger")
def test_create_table_error(self, logger):
parse_one(
"""CREATE TABLE PARTITION""",
error_level=ErrorLevel.WARN,
)
assert_logger_contains(
"Expected table name",
logger,
)
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