185 lines
6.6 KiB
Python
185 lines
6.6 KiB
Python
import unittest
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from unittest.mock import patch
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from sqlglot import Parser, exp, parse, parse_one
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from sqlglot.errors import ErrorLevel, ParseError
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from tests.helpers import assert_logger_contains
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class TestParser(unittest.TestCase):
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def test_parse_empty(self):
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self.assertIsNone(parse_one(""))
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def test_parse_into(self):
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self.assertIsInstance(parse_one("left join foo", into=exp.Join), exp.Join)
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self.assertIsInstance(parse_one("int", into=exp.DataType), exp.DataType)
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self.assertIsInstance(parse_one("array<int>", into=exp.DataType), exp.DataType)
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def test_column(self):
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columns = parse_one("select a, ARRAY[1] b, case when 1 then 1 end").find_all(exp.Column)
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assert len(list(columns)) == 1
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self.assertIsNotNone(parse_one("date").find(exp.Column))
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def test_table(self):
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tables = [t.sql() for t in parse_one("select * from a, b.c, .d").find_all(exp.Table)]
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self.assertEqual(tables, ["a", "b.c", "d"])
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def test_select(self):
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self.assertIsNotNone(parse_one("select 1 natural"))
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self.assertIsNotNone(parse_one("select * from (select 1) x order by x.y").args["order"])
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self.assertIsNotNone(parse_one("select * from x where a = (select 1) order by x.y").args["order"])
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self.assertEqual(len(parse_one("select * from (select 1) x cross join y").args["joins"]), 1)
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self.assertEqual(
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parse_one("""SELECT * FROM x CROSS JOIN y, z LATERAL VIEW EXPLODE(y)""").sql(),
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"""SELECT * FROM x, z LATERAL VIEW EXPLODE(y) CROSS JOIN y""",
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)
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def test_command(self):
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expressions = parse("SET x = 1; ADD JAR s3://a; SELECT 1")
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self.assertEqual(len(expressions), 3)
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self.assertEqual(expressions[0].sql(), "SET x = 1")
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self.assertEqual(expressions[1].sql(), "ADD JAR s3://a")
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self.assertEqual(expressions[2].sql(), "SELECT 1")
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def test_identify(self):
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expression = parse_one(
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"""
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SELECT a, "b", c AS c, d AS "D", e AS "y|z'"
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FROM y."z"
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"""
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)
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assert expression.expressions[0].text("this") == "a"
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assert expression.expressions[1].text("this") == "b"
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assert expression.expressions[2].text("alias") == "c"
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assert expression.expressions[3].text("alias") == "D"
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assert expression.expressions[4].text("alias") == "y|z'"
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table = expression.args["from"].expressions[0]
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assert table.args["this"].args["this"] == "z"
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assert table.args["db"].args["this"] == "y"
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def test_multi(self):
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expressions = parse(
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"""
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SELECT * FROM a; SELECT * FROM b;
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"""
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)
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assert len(expressions) == 2
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assert expressions[0].args["from"].expressions[0].args["this"].args["this"] == "a"
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assert expressions[1].args["from"].expressions[0].args["this"].args["this"] == "b"
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def test_expression(self):
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ignore = Parser(error_level=ErrorLevel.IGNORE)
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self.assertIsInstance(ignore.expression(exp.Hint, expressions=[""]), exp.Hint)
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self.assertIsInstance(ignore.expression(exp.Hint, y=""), exp.Hint)
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self.assertIsInstance(ignore.expression(exp.Hint), exp.Hint)
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default = Parser()
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self.assertIsInstance(default.expression(exp.Hint, expressions=[""]), exp.Hint)
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default.expression(exp.Hint, y="")
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default.expression(exp.Hint)
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self.assertEqual(len(default.errors), 3)
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warn = Parser(error_level=ErrorLevel.WARN)
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warn.expression(exp.Hint, y="")
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self.assertEqual(len(warn.errors), 2)
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def test_parse_errors(self):
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with self.assertRaises(ParseError):
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parse_one("IF(a > 0, a, b, c)")
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with self.assertRaises(ParseError):
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parse_one("IF(a > 0)")
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with self.assertRaises(ParseError):
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parse_one("WITH cte AS (SELECT * FROM x)")
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def test_space(self):
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self.assertEqual(
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parse_one("SELECT ROW() OVER(PARTITION BY x) FROM x GROUP BY y").sql(),
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"SELECT ROW() OVER (PARTITION BY x) FROM x GROUP BY y",
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)
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self.assertEqual(
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parse_one(
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"""SELECT * FROM x GROUP
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BY y"""
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).sql(),
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"SELECT * FROM x GROUP BY y",
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)
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def test_missing_by(self):
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with self.assertRaises(ParseError):
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parse_one("SELECT FROM x ORDER BY")
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def test_parameter(self):
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self.assertEqual(parse_one("SELECT @x, @@x, @1").sql(), "SELECT @x, @@x, @1")
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def test_annotations(self):
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expression = parse_one(
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"""
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SELECT
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a #annotation1,
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b as B #annotation2:testing ,
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"test#annotation",c#annotation3, d #annotation4,
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e #,
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f # space
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FROM foo
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"""
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)
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assert expression.expressions[0].name == "annotation1"
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assert expression.expressions[1].name == "annotation2:testing "
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assert expression.expressions[2].name == "test#annotation"
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assert expression.expressions[3].name == "annotation3"
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assert expression.expressions[4].name == "annotation4"
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assert expression.expressions[5].name == ""
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assert expression.expressions[6].name == " space"
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def test_pretty_config_override(self):
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self.assertEqual(parse_one("SELECT col FROM x").sql(), "SELECT col FROM x")
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with patch("sqlglot.pretty", True):
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self.assertEqual(parse_one("SELECT col FROM x").sql(), "SELECT\n col\nFROM x")
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self.assertEqual(parse_one("SELECT col FROM x").sql(pretty=True), "SELECT\n col\nFROM x")
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@patch("sqlglot.parser.logger")
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def test_comment_error_n(self, logger):
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parse_one(
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"""CREATE TABLE x
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(
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-- test
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)""",
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error_level=ErrorLevel.WARN,
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)
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assert_logger_contains(
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"Required keyword: 'expressions' missing for <class 'sqlglot.expressions.Schema'>. Line 4, Col: 1.",
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logger,
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)
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@patch("sqlglot.parser.logger")
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def test_comment_error_r(self, logger):
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parse_one(
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"""CREATE TABLE x (-- test\r)""",
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error_level=ErrorLevel.WARN,
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)
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assert_logger_contains(
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"Required keyword: 'expressions' missing for <class 'sqlglot.expressions.Schema'>. Line 2, Col: 1.",
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logger,
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)
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@patch("sqlglot.parser.logger")
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def test_create_table_error(self, logger):
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parse_one(
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"""CREATE TABLE PARTITION""",
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error_level=ErrorLevel.WARN,
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)
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assert_logger_contains(
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"Expected table name",
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logger,
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)
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