import datetime import math import unittest from sqlglot import ParseError, alias, exp, parse_one class TestExpressions(unittest.TestCase): maxDiff = None def test_arg_key(self): self.assertEqual(parse_one("sum(1)").find(exp.Literal).arg_key, "this") def test_depth(self): self.assertEqual(parse_one("x(1)").find(exp.Literal).depth, 1) def test_iter(self): self.assertEqual([exp.Literal.number(1), exp.Literal.number(2)], list(parse_one("[1, 2]"))) with self.assertRaises(TypeError): for x in parse_one("1"): pass def test_eq(self): self.assertNotEqual(exp.to_identifier("a"), exp.to_identifier("A")) self.assertEqual( exp.Column(table=exp.to_identifier("b"), this=exp.to_identifier("b")), exp.Column(this=exp.to_identifier("b"), table=exp.to_identifier("b")), ) self.assertNotEqual(exp.to_identifier("a", quoted=True), exp.to_identifier("A")) self.assertNotEqual(exp.to_identifier("A", quoted=True), exp.to_identifier("A")) self.assertNotEqual( exp.to_identifier("A", quoted=True), exp.to_identifier("a", quoted=True) ) self.assertNotEqual(parse_one("'x'"), parse_one("'X'")) self.assertNotEqual(parse_one("'1'"), parse_one("1")) self.assertEqual(parse_one("`a`", read="hive"), parse_one('"a"')) self.assertEqual(parse_one("`a`", read="hive"), parse_one('"a" ')) self.assertEqual(parse_one("`a`.`b`", read="hive"), parse_one('"a"."b"')) self.assertEqual(parse_one("select a, b+1"), parse_one("SELECT a, b + 1")) self.assertNotEqual(parse_one("`a`.`b`.`c`", read="hive"), parse_one("a.b.c")) self.assertNotEqual(parse_one("a.b.c.d", read="hive"), parse_one("a.b.c")) self.assertEqual(parse_one("a.b.c.d", read="hive"), parse_one("a.b.c.d")) self.assertEqual(parse_one("a + b * c - 1.0"), parse_one("a+b*c-1.0")) self.assertNotEqual(parse_one("a + b * c - 1.0"), parse_one("a + b * c + 1.0")) self.assertEqual(parse_one("a as b"), parse_one("a AS b")) self.assertNotEqual(parse_one("a as b"), parse_one("a")) self.assertEqual( parse_one("ROW() OVER(Partition by y)"), parse_one("ROW() OVER (partition BY y)"), ) self.assertEqual(parse_one("TO_DATE(x)", read="hive"), parse_one("ts_or_ds_to_date(x)")) self.assertEqual(exp.Table(pivots=[]), exp.Table()) self.assertNotEqual(exp.Table(pivots=[None]), exp.Table()) self.assertEqual( exp.DataType.build("int"), exp.DataType(this=exp.DataType.Type.INT, nested=False) ) def test_find(self): expression = parse_one("CREATE TABLE x STORED AS PARQUET AS SELECT * FROM y") self.assertTrue(expression.find(exp.Create)) self.assertFalse(expression.find(exp.Group)) self.assertEqual( [table.name for table in expression.find_all(exp.Table)], ["x", "y"], ) def test_find_all(self): expression = parse_one( """ SELECT * FROM ( SELECT b.* FROM a.b b ) x JOIN ( SELECT c.foo FROM a.c c WHERE foo = 1 ) y ON x.c = y.foo CROSS JOIN ( SELECT * FROM ( SELECT d.bar FROM d ) nested ) z ON x.c = y.foo """ ) self.assertEqual( [table.name for table in expression.find_all(exp.Table)], ["b", "c", "d"], ) expression = parse_one("select a + b + c + d") self.assertEqual( [column.name for column in expression.find_all(exp.Column)], ["d", "c", "a", "b"], ) self.assertEqual( [column.name for column in expression.find_all(exp.Column, bfs=False)], ["a", "b", "c", "d"], ) def test_find_ancestor(self): column = parse_one("select * from foo where (a + 1 > 2)").find(exp.Column) self.assertIsInstance(column, exp.Column) self.assertIsInstance(column.parent_select, exp.Select) self.assertIsNone(column.find_ancestor(exp.Join)) def test_to_dot(self): column = parse_one('a.b.c."d".e.f').find(exp.Column) dot = column.to_dot() self.assertEqual(dot.sql(), 'a.b.c."d".e.f') self.assertEqual( dot, exp.Dot( this=exp.Dot( this=exp.Dot( this=exp.Dot( this=exp.Dot( this=exp.to_identifier("a"), expression=exp.to_identifier("b"), ), expression=exp.to_identifier("c"), ), expression=exp.to_identifier("d", quoted=True), ), expression=exp.to_identifier("e"), ), expression=exp.to_identifier("f"), ), ) def test_root(self): ast = parse_one("select * from (select a from x)") self.assertIs(ast, ast.root()) self.assertIs(ast, ast.find(exp.Column).root()) def test_alias_or_name(self): expression = parse_one( "SELECT a, b AS B, c + d AS e, *, 'zz', 'zz' AS z FROM foo as bar, baz" ) self.assertEqual( [e.alias_or_name for e in expression.expressions], ["a", "B", "e", "*", "zz", "z"], ) self.assertEqual( {e.alias_or_name for e in expression.find_all(exp.Table)}, {"bar", "baz"}, ) expression = parse_one( """ WITH first AS (SELECT * FROM foo), second AS (SELECT * FROM bar) SELECT * FROM first, second, (SELECT * FROM baz) AS third """ ) self.assertEqual( [e.alias_or_name for e in expression.args["with"].expressions], ["first", "second"], ) self.assertEqual("first", expression.args["from"].alias_or_name) self.assertEqual( [e.alias_or_name for e in expression.args["joins"]], ["second", "third"], ) self.assertEqual(parse_one("x.*").name, "*") self.assertEqual(parse_one("NULL").name, "NULL") self.assertEqual(parse_one("a.b.c").name, "c") def test_table_name(self): bq_dashed_table = exp.to_table("a-1.b.c", dialect="bigquery") self.assertEqual(exp.table_name(bq_dashed_table), '"a-1".b.c') self.assertEqual(exp.table_name(bq_dashed_table, dialect="bigquery"), "`a-1`.b.c") self.assertEqual(exp.table_name("a-1.b.c", dialect="bigquery"), "`a-1`.b.c") self.assertEqual(exp.table_name(parse_one("a", into=exp.Table)), "a") self.assertEqual(exp.table_name(parse_one("a.b", into=exp.Table)), "a.b") self.assertEqual(exp.table_name(parse_one("a.b.c", into=exp.Table)), "a.b.c") self.assertEqual(exp.table_name("a.b.c"), "a.b.c") self.assertEqual(exp.table_name(exp.to_table("a.b.c.d.e", dialect="bigquery")), "a.b.c.d.e") self.assertEqual(exp.table_name(exp.to_table("'@foo'", dialect="snowflake")), "'@foo'") self.assertEqual(exp.table_name(exp.to_table("@foo", dialect="snowflake")), "@foo") self.assertEqual( exp.table_name(parse_one("foo.`{bar,er}`", read="databricks"), dialect="databricks"), "foo.`{bar,er}`", ) def test_table(self): self.assertEqual(exp.table_("a", alias="b"), parse_one("select * from a b").find(exp.Table)) self.assertEqual(exp.table_("a", "").sql(), "a") def test_replace_tables(self): self.assertEqual( exp.replace_tables( parse_one("select * from a AS a, b, c.a, d.a cross join e.a"), {"a": "a1", "b": "b.a", "c.a": "c.a2", "d.a": "d2"}, ).sql(), "SELECT * FROM a1 AS a, b.a, c.a2, d2 CROSS JOIN e.a", ) def test_replace_placeholders(self): self.assertEqual( exp.replace_placeholders( parse_one("select * from :tbl1 JOIN :tbl2 ON :col1 = :str1 WHERE :col2 > :int1"), tbl1=exp.to_identifier("foo"), tbl2=exp.to_identifier("bar"), col1=exp.to_identifier("a"), col2=exp.to_identifier("c"), str1="b", int1=100, ).sql(), "SELECT * FROM foo JOIN bar ON a = 'b' WHERE c > 100", ) self.assertEqual( exp.replace_placeholders( parse_one("select * from ? JOIN ? ON ? = ? WHERE ? = 'bla'"), exp.to_identifier("foo"), exp.to_identifier("bar"), exp.to_identifier("a"), "b", "bla", ).sql(), "SELECT * FROM foo JOIN bar ON a = 'b' WHERE 'bla' = 'bla'", ) self.assertEqual( exp.replace_placeholders( parse_one("select * from ? WHERE ? > 100"), exp.to_identifier("foo"), ).sql(), "SELECT * FROM foo WHERE ? > 100", ) self.assertEqual( exp.replace_placeholders( parse_one("select * from :name WHERE ? > 100"), another_name="bla" ).sql(), "SELECT * FROM :name WHERE ? > 100", ) self.assertEqual( exp.replace_placeholders( parse_one("select * from (SELECT :col1 FROM ?) WHERE :col2 > ?"), exp.to_identifier("tbl1"), 100, "tbl3", col1=exp.to_identifier("a"), col2=exp.to_identifier("b"), col3="c", ).sql(), "SELECT * FROM (SELECT a FROM tbl1) WHERE b > 100", ) def test_function_building(self): self.assertEqual(exp.func("max", 1).sql(), "MAX(1)") self.assertEqual(exp.func("max", 1, 2).sql(), "MAX(1, 2)") self.assertEqual(exp.func("bla", 1, "foo").sql(), "BLA(1, foo)") self.assertEqual(exp.func("COUNT", exp.Star()).sql(), "COUNT(*)") self.assertEqual(exp.func("bloo").sql(), "BLOO()") self.assertEqual( exp.func("locate", "'x'", "'xo'", dialect="hive").sql("hive"), "LOCATE('x', 'xo')" ) self.assertIsInstance(exp.func("instr", "x", "b", dialect="mysql"), exp.StrPosition) self.assertIsInstance(exp.func("bla", 1, "foo"), exp.Anonymous) self.assertIsInstance( exp.func("cast", this=exp.Literal.number(5), to=exp.DataType.build("DOUBLE")), exp.Cast, ) with self.assertRaises(ValueError): exp.func("some_func", 1, arg2="foo") with self.assertRaises(ValueError): exp.func("abs") def test_named_selects(self): expression = parse_one( "SELECT a, b AS B, c + d AS e, *, 'zz', 'zz' AS z FROM foo as bar, baz" ) self.assertEqual(expression.named_selects, ["a", "B", "e", "*", "zz", "z"]) expression = parse_one( """ WITH first AS (SELECT * FROM foo) SELECT foo.bar, foo.baz as bazz, SUM(x) FROM first """ ) self.assertEqual(expression.named_selects, ["bar", "bazz"]) expression = parse_one( """ SELECT foo, bar FROM first UNION SELECT "ss" as foo, bar FROM second UNION ALL SELECT foo, bazz FROM third """ ) self.assertEqual(expression.named_selects, ["foo", "bar"]) def test_selects(self): expression = parse_one("SELECT FROM x") self.assertEqual(expression.selects, []) expression = parse_one("SELECT a FROM x") self.assertEqual([s.sql() for s in expression.selects], ["a"]) expression = parse_one("SELECT a, b FROM x") self.assertEqual([s.sql() for s in expression.selects], ["a", "b"]) expression = parse_one("(SELECT a, b FROM x)") self.assertEqual([s.sql() for s in expression.selects], ["a", "b"]) def test_alias_column_names(self): expression = parse_one("SELECT * FROM (SELECT * FROM x) AS y") subquery = expression.find(exp.Subquery) self.assertEqual(subquery.alias_column_names, []) expression = parse_one("SELECT * FROM (SELECT * FROM x) AS y(a)") subquery = expression.find(exp.Subquery) self.assertEqual(subquery.alias_column_names, ["a"]) expression = parse_one("SELECT * FROM (SELECT * FROM x) AS y(a, b)") subquery = expression.find(exp.Subquery) self.assertEqual(subquery.alias_column_names, ["a", "b"]) expression = parse_one("WITH y AS (SELECT * FROM x) SELECT * FROM y") cte = expression.find(exp.CTE) self.assertEqual(cte.alias_column_names, []) expression = parse_one("WITH y(a, b) AS (SELECT * FROM x) SELECT * FROM y") cte = expression.find(exp.CTE) self.assertEqual(cte.alias_column_names, ["a", "b"]) expression = parse_one("SELECT * FROM tbl AS tbl(a, b)") table = expression.find(exp.Table) self.assertEqual(table.alias_column_names, ["a", "b"]) def test_ctes(self): expression = parse_one("SELECT a FROM x") self.assertEqual(expression.ctes, []) expression = parse_one("WITH x AS (SELECT a FROM y) SELECT a FROM x") self.assertEqual([s.sql() for s in expression.ctes], ["x AS (SELECT a FROM y)"]) def test_hash(self): self.assertEqual( { parse_one("select a.b"), parse_one("1+2"), parse_one('"a"."b"'), parse_one("a.b.c.d"), }, { parse_one("select a.b"), parse_one("1+2"), parse_one('"a"."b"'), parse_one("a.b.c.d"), }, ) def test_sql(self): self.assertEqual(parse_one("x + y * 2").sql(), "x + y * 2") self.assertEqual(parse_one('select "x"').sql(dialect="hive", pretty=True), "SELECT\n `x`") self.assertEqual(parse_one("X + y").sql(identify=True, normalize=True), '"x" + "y"') self.assertEqual(parse_one('"X" + Y').sql(identify=True, normalize=True), '"X" + "y"') self.assertEqual(parse_one("SUM(X)").sql(identify=True, normalize=True), 'SUM("x")') def test_transform_with_arguments(self): expression = parse_one("a") def fun(node, alias_=True): if alias_: return parse_one("a AS a") return node transformed_expression = expression.transform(fun) self.assertEqual(transformed_expression.sql(dialect="presto"), "a AS a") transformed_expression_2 = expression.transform(fun, alias_=False) self.assertEqual(transformed_expression_2.sql(dialect="presto"), "a") def test_transform_simple(self): expression = parse_one("IF(a > 0, a, b)") def fun(node): if isinstance(node, exp.Column) and node.name == "a": return parse_one("c - 2") return node actual_expression_1 = expression.transform(fun) self.assertEqual(actual_expression_1.sql(dialect="presto"), "IF(c - 2 > 0, c - 2, b)") self.assertIsNot(actual_expression_1, expression) actual_expression_2 = expression.transform(fun, copy=False) self.assertEqual(actual_expression_2.sql(dialect="presto"), "IF(c - 2 > 0, c - 2, b)") self.assertIs(actual_expression_2, expression) def test_transform_no_infinite_recursion(self): expression = parse_one("a") def fun(node): if isinstance(node, exp.Column) and node.name == "a": return parse_one("FUN(a)") return node self.assertEqual(expression.transform(fun).sql(), "FUN(a)") def test_transform_multiple_children(self): expression = parse_one("SELECT * FROM x") def fun(node): if isinstance(node, exp.Star): return [parse_one(c) for c in ["a", "b"]] return node self.assertEqual(expression.transform(fun).sql(), "SELECT a, b FROM x") def test_transform_node_removal(self): expression = parse_one("SELECT a, b FROM x") def remove_column_b(node): if isinstance(node, exp.Column) and node.name == "b": return None return node self.assertEqual(expression.transform(remove_column_b).sql(), "SELECT a FROM x") self.assertEqual(expression.transform(lambda _: None), None) expression = parse_one("CAST(x AS FLOAT)") def remove_non_list_arg(node): if isinstance(node, exp.DataType): return None return node self.assertEqual(expression.transform(remove_non_list_arg).sql(), "CAST(x AS )") expression = parse_one("SELECT a, b FROM x") def remove_all_columns(node): if isinstance(node, exp.Column): return None return node self.assertEqual(expression.transform(remove_all_columns).sql(), "SELECT FROM x") def test_replace(self): expression = parse_one("SELECT a, b FROM x") expression.find(exp.Column).replace(parse_one("c")) self.assertEqual(expression.sql(), "SELECT c, b FROM x") expression.find(exp.Table).replace(parse_one("y")) self.assertEqual(expression.sql(), "SELECT c, b FROM y") def test_arg_deletion(self): # Using the pop helper method expression = parse_one("SELECT a, b FROM x") expression.find(exp.Column).pop() self.assertEqual(expression.sql(), "SELECT b FROM x") expression.find(exp.Column).pop() self.assertEqual(expression.sql(), "SELECT FROM x") expression.pop() self.assertEqual(expression.sql(), "SELECT FROM x") expression = parse_one("WITH x AS (SELECT a FROM x) SELECT * FROM x") expression.find(exp.With).pop() self.assertEqual(expression.sql(), "SELECT * FROM x") # Manually deleting by setting to None expression = parse_one("SELECT * FROM foo JOIN bar") self.assertEqual(len(expression.args.get("joins", [])), 1) expression.set("joins", None) self.assertEqual(expression.sql(), "SELECT * FROM foo") self.assertEqual(expression.args.get("joins", []), []) self.assertIsNone(expression.args.get("joins")) def test_walk(self): expression = parse_one("SELECT * FROM (SELECT * FROM x)") self.assertEqual(len(list(expression.walk())), 9) self.assertEqual(len(list(expression.walk(bfs=False))), 9) self.assertTrue(all(isinstance(e, exp.Expression) for e, _, _ in expression.walk())) self.assertTrue( all(isinstance(e, exp.Expression) for e, _, _ in expression.walk(bfs=False)) ) def test_functions(self): self.assertIsInstance(parse_one("x LIKE ANY (y)"), exp.Like) self.assertIsInstance(parse_one("x ILIKE ANY (y)"), exp.ILike) self.assertIsInstance(parse_one("ABS(a)"), exp.Abs) self.assertIsInstance(parse_one("APPROX_DISTINCT(a)"), exp.ApproxDistinct) self.assertIsInstance(parse_one("ARRAY(a)"), exp.Array) self.assertIsInstance(parse_one("ARRAY_AGG(a)"), exp.ArrayAgg) self.assertIsInstance(parse_one("ARRAY_CONTAINS(a, 'a')"), exp.ArrayContains) self.assertIsInstance(parse_one("ARRAY_SIZE(a)"), exp.ArraySize) self.assertIsInstance(parse_one("AVG(a)"), exp.Avg) self.assertIsInstance(parse_one("BEGIN DEFERRED TRANSACTION"), exp.Transaction) self.assertIsInstance(parse_one("CEIL(a)"), exp.Ceil) self.assertIsInstance(parse_one("CEILING(a)"), exp.Ceil) self.assertIsInstance(parse_one("COALESCE(a, b)"), exp.Coalesce) self.assertIsInstance(parse_one("COMMIT"), exp.Commit) self.assertIsInstance(parse_one("COUNT(a)"), exp.Count) self.assertIsInstance(parse_one("COUNT_IF(a > 0)"), exp.CountIf) self.assertIsInstance(parse_one("DATE_ADD(a, 1)"), exp.DateAdd) self.assertIsInstance(parse_one("DATE_DIFF(a, 2)"), exp.DateDiff) self.assertIsInstance(parse_one("DATE_STR_TO_DATE(a)"), exp.DateStrToDate) self.assertIsInstance(parse_one("DAY(a)"), exp.Day) self.assertIsInstance(parse_one("EXP(a)"), exp.Exp) self.assertIsInstance(parse_one("FLOOR(a)"), exp.Floor) self.assertIsInstance(parse_one("GENERATE_SERIES(a, b, c)"), exp.GenerateSeries) self.assertIsInstance(parse_one("GLOB(x, y)"), exp.Glob) self.assertIsInstance(parse_one("GREATEST(a, b)"), exp.Greatest) self.assertIsInstance(parse_one("IF(a, b, c)"), exp.If) self.assertIsInstance(parse_one("INITCAP(a)"), exp.Initcap) self.assertIsInstance(parse_one("JSON_EXTRACT(a, '$.name')"), exp.JSONExtract) self.assertIsInstance(parse_one("JSON_EXTRACT_SCALAR(a, '$.name')"), exp.JSONExtractScalar) self.assertIsInstance(parse_one("LEAST(a, b)"), exp.Least) self.assertIsInstance(parse_one("LIKE(x, y)"), exp.Like) self.assertIsInstance(parse_one("LN(a)"), exp.Ln) self.assertIsInstance(parse_one("LOG10(a)"), exp.Log10) self.assertIsInstance(parse_one("MAX(a)"), exp.Max) self.assertIsInstance(parse_one("MIN(a)"), exp.Min) self.assertIsInstance(parse_one("MONTH(a)"), exp.Month) self.assertIsInstance(parse_one("POSITION(' ' IN a)"), exp.StrPosition) self.assertIsInstance(parse_one("POW(a, 2)"), exp.Pow) self.assertIsInstance(parse_one("POWER(a, 2)"), exp.Pow) self.assertIsInstance(parse_one("QUANTILE(a, 0.90)"), exp.Quantile) self.assertIsInstance(parse_one("REGEXP_LIKE(a, 'test')"), exp.RegexpLike) self.assertIsInstance(parse_one("REGEXP_SPLIT(a, 'test')"), exp.RegexpSplit) self.assertIsInstance(parse_one("ROLLBACK"), exp.Rollback) self.assertIsInstance(parse_one("ROUND(a)"), exp.Round) self.assertIsInstance(parse_one("ROUND(a, 2)"), exp.Round) self.assertIsInstance(parse_one("SPLIT(a, 'test')"), exp.Split) self.assertIsInstance(parse_one("STR_POSITION(a, 'test')"), exp.StrPosition) self.assertIsInstance(parse_one("STR_TO_UNIX(a, 'format')"), exp.StrToUnix) self.assertIsInstance(parse_one("STRUCT_EXTRACT(a, 'test')"), exp.StructExtract) self.assertIsInstance(parse_one("SUM(a)"), exp.Sum) self.assertIsInstance(parse_one("SQRT(a)"), exp.Sqrt) self.assertIsInstance(parse_one("STDDEV(a)"), exp.Stddev) self.assertIsInstance(parse_one("STDDEV_POP(a)"), exp.StddevPop) self.assertIsInstance(parse_one("STDDEV_SAMP(a)"), exp.StddevSamp) self.assertIsInstance(parse_one("TIME_TO_STR(a, 'format')"), exp.TimeToStr) self.assertIsInstance(parse_one("TIME_TO_TIME_STR(a)"), exp.Cast) self.assertIsInstance(parse_one("TIME_TO_UNIX(a)"), exp.TimeToUnix) self.assertIsInstance(parse_one("TIME_STR_TO_DATE(a)"), exp.TimeStrToDate) self.assertIsInstance(parse_one("TIME_STR_TO_TIME(a)"), exp.TimeStrToTime) self.assertIsInstance(parse_one("TIME_STR_TO_UNIX(a)"), exp.TimeStrToUnix) self.assertIsInstance(parse_one("TRIM(LEADING 'b' FROM 'bla')"), exp.Trim) self.assertIsInstance(parse_one("TS_OR_DS_ADD(a, 1, 'day')"), exp.TsOrDsAdd) self.assertIsInstance(parse_one("TS_OR_DS_TO_DATE(a)"), exp.TsOrDsToDate) self.assertIsInstance(parse_one("TS_OR_DS_TO_DATE_STR(a)"), exp.Substring) self.assertIsInstance(parse_one("UNIX_TO_STR(a, 'format')"), exp.UnixToStr) self.assertIsInstance(parse_one("UNIX_TO_TIME(a)"), exp.UnixToTime) self.assertIsInstance(parse_one("UNIX_TO_TIME_STR(a)"), exp.UnixToTimeStr) self.assertIsInstance(parse_one("VARIANCE(a)"), exp.Variance) self.assertIsInstance(parse_one("VARIANCE_POP(a)"), exp.VariancePop) self.assertIsInstance(parse_one("YEAR(a)"), exp.Year) self.assertIsInstance(parse_one("HLL(a)"), exp.Hll) self.assertIsInstance(parse_one("ARRAY(time, foo)"), exp.Array) self.assertIsInstance(parse_one("STANDARD_HASH('hello', 'sha256')"), exp.StandardHash) self.assertIsInstance(parse_one("DATE(foo)"), exp.Date) self.assertIsInstance(parse_one("HEX(foo)"), exp.Hex) self.assertIsInstance(parse_one("TO_HEX(foo)", read="bigquery"), exp.Hex) self.assertIsInstance(parse_one("TO_HEX(MD5(foo))", read="bigquery"), exp.MD5) self.assertIsInstance(parse_one("TRANSFORM(a, b)", read="spark"), exp.Transform) def test_column(self): column = parse_one("a.b.c.d") self.assertEqual(column.catalog, "a") self.assertEqual(column.db, "b") self.assertEqual(column.table, "c") self.assertEqual(column.name, "d") column = parse_one("a") self.assertEqual(column.name, "a") self.assertEqual(column.table, "") fields = parse_one("a.b.c.d.e") self.assertIsInstance(fields, exp.Dot) self.assertEqual(fields.text("expression"), "e") column = fields.find(exp.Column) self.assertEqual(column.name, "d") self.assertEqual(column.table, "c") self.assertEqual(column.db, "b") self.assertEqual(column.catalog, "a") column = parse_one("a[0].b") self.assertIsInstance(column, exp.Dot) self.assertIsInstance(column.this, exp.Bracket) self.assertIsInstance(column.this.this, exp.Column) column = parse_one("a.*") self.assertIsInstance(column, exp.Column) self.assertIsInstance(column.this, exp.Star) self.assertIsInstance(column.args["table"], exp.Identifier) self.assertEqual(column.table, "a") self.assertIsInstance(parse_one("*"), exp.Star) self.assertEqual(exp.column("a", table="b", db="c", catalog="d"), exp.to_column("d.c.b.a")) def test_text(self): column = parse_one("a.b.c.d.e") self.assertEqual(column.text("expression"), "e") self.assertEqual(column.text("y"), "") self.assertEqual(parse_one("select * from x.y").find(exp.Table).text("db"), "x") self.assertEqual(parse_one("select *").name, "") self.assertEqual(parse_one("1 + 1").name, "1") self.assertEqual(parse_one("'a'").name, "a") def test_alias(self): self.assertEqual(alias("foo", "bar").sql(), "foo AS bar") self.assertEqual(alias("foo", "bar-1").sql(), 'foo AS "bar-1"') self.assertEqual(alias("foo", "bar_1").sql(), "foo AS bar_1") self.assertEqual(alias("foo * 2", "2bar").sql(), 'foo * 2 AS "2bar"') self.assertEqual(alias('"foo"', "_bar").sql(), '"foo" AS _bar') self.assertEqual(alias("foo", "bar", quoted=True).sql(), 'foo AS "bar"') def test_unit(self): unit = parse_one("timestamp_trunc(current_timestamp, week(thursday))") self.assertIsNotNone(unit.find(exp.CurrentTimestamp)) week = unit.find(exp.Week) self.assertEqual(week.this, exp.var("thursday")) for abbreviated_unit, unnabreviated_unit in exp.TimeUnit.UNABBREVIATED_UNIT_NAME.items(): interval = parse_one(f"interval '500 {abbreviated_unit}'") self.assertIsInstance(interval.unit, exp.Var) self.assertEqual(interval.unit.name, unnabreviated_unit) def test_identifier(self): self.assertTrue(exp.to_identifier('"x"').quoted) self.assertFalse(exp.to_identifier("x").quoted) self.assertTrue(exp.to_identifier("foo ").quoted) self.assertFalse(exp.to_identifier("_x").quoted) def test_function_normalizer(self): self.assertEqual(parse_one("HELLO()").sql(normalize_functions="lower"), "hello()") self.assertEqual(parse_one("hello()").sql(normalize_functions="upper"), "HELLO()") self.assertEqual(parse_one("heLLO()").sql(normalize_functions=False), "heLLO()") self.assertEqual(parse_one("SUM(x)").sql(normalize_functions="lower"), "sum(x)") self.assertEqual(parse_one("sum(x)").sql(normalize_functions="upper"), "SUM(x)") def test_properties_from_dict(self): self.assertEqual( exp.Properties.from_dict( { "FORMAT": "parquet", "PARTITIONED_BY": (exp.to_identifier("a"), exp.to_identifier("b")), "custom": 1, "ENGINE": None, "COLLATE": True, } ), exp.Properties( expressions=[ exp.FileFormatProperty(this=exp.Literal.string("parquet")), exp.PartitionedByProperty( this=exp.Tuple(expressions=[exp.to_identifier("a"), exp.to_identifier("b")]) ), exp.Property(this=exp.Literal.string("custom"), value=exp.Literal.number(1)), exp.EngineProperty(this=exp.null()), exp.CollateProperty(this=exp.true()), ] ), ) self.assertRaises(ValueError, exp.Properties.from_dict, {"FORMAT": object}) def test_convert(self): for value, expected in [ (1, "1"), ("1", "'1'"), (None, "NULL"), (True, "TRUE"), ((1, "2", None), "(1, '2', NULL)"), ([1, "2", None], "ARRAY(1, '2', NULL)"), ({"x": None}, "MAP(ARRAY('x'), ARRAY(NULL))"), ( datetime.datetime(2022, 10, 1, 1, 1, 1, 1), "TIME_STR_TO_TIME('2022-10-01T01:01:01.000001+00:00')", ), ( datetime.datetime(2022, 10, 1, 1, 1, 1, tzinfo=datetime.timezone.utc), "TIME_STR_TO_TIME('2022-10-01T01:01:01+00:00')", ), (datetime.date(2022, 10, 1), "DATE_STR_TO_DATE('2022-10-01')"), (math.nan, "NULL"), ]: with self.subTest(value): self.assertEqual(exp.convert(value).sql(), expected) self.assertEqual( exp.convert({"test": "value"}).sql(dialect="spark"), "MAP_FROM_ARRAYS(ARRAY('test'), ARRAY('value'))", ) def test_comment_alias(self): sql = """ SELECT a, b AS B, c, /*comment*/ d AS D, -- another comment CAST(x AS INT) -- final comment FROM foo """ expression = parse_one(sql) self.assertEqual( [e.alias_or_name for e in expression.expressions], ["a", "B", "c", "D", "x"], ) self.assertEqual( expression.sql(), "SELECT a, b AS B, c /* comment */, d AS D /* another comment */, CAST(x AS INT) /* final comment */ FROM foo", ) self.assertEqual( expression.sql(comments=False), "SELECT a, b AS B, c, d AS D, CAST(x AS INT) FROM foo", ) self.assertEqual( expression.sql(pretty=True, comments=False), """SELECT a, b AS B, c, d AS D, CAST(x AS INT) FROM foo""", ) self.assertEqual( expression.sql(pretty=True), """SELECT a, b AS B, c, /* comment */ d AS D, /* another comment */ CAST(x AS INT) /* final comment */ FROM foo""", ) def test_to_interval(self): self.assertEqual(exp.to_interval("1day").sql(), "INTERVAL '1' day") self.assertEqual(exp.to_interval(" 5 months").sql(), "INTERVAL '5' months") with self.assertRaises(ValueError): exp.to_interval("bla") self.assertEqual(exp.to_interval(exp.Literal.string("1day")).sql(), "INTERVAL '1' day") self.assertEqual( exp.to_interval(exp.Literal.string(" 5 months")).sql(), "INTERVAL '5' months" ) with self.assertRaises(ValueError): exp.to_interval(exp.Literal.string("bla")) def test_to_table(self): table_only = exp.to_table("table_name") self.assertEqual(table_only.name, "table_name") self.assertIsNone(table_only.args.get("db")) self.assertIsNone(table_only.args.get("catalog")) db_and_table = exp.to_table("db.table_name") self.assertEqual(db_and_table.name, "table_name") self.assertEqual(db_and_table.args.get("db"), exp.to_identifier("db")) self.assertIsNone(db_and_table.args.get("catalog")) catalog_db_and_table = exp.to_table("catalog.db.table_name") self.assertEqual(catalog_db_and_table.name, "table_name") self.assertEqual(catalog_db_and_table.args.get("db"), exp.to_identifier("db")) self.assertEqual(catalog_db_and_table.args.get("catalog"), exp.to_identifier("catalog")) with self.assertRaises(ValueError): exp.to_table(1) def test_to_column(self): column_only = exp.to_column("column_name") self.assertEqual(column_only.name, "column_name") self.assertIsNone(column_only.args.get("table")) table_and_column = exp.to_column("table_name.column_name") self.assertEqual(table_and_column.name, "column_name") self.assertEqual(table_and_column.args.get("table"), exp.to_identifier("table_name")) with self.assertRaises(ValueError): exp.to_column(1) def test_union(self): expression = parse_one("SELECT cola, colb UNION SELECT colx, coly") self.assertIsInstance(expression, exp.Union) self.assertEqual(expression.named_selects, ["cola", "colb"]) self.assertEqual( expression.selects, [ exp.Column(this=exp.to_identifier("cola")), exp.Column(this=exp.to_identifier("colb")), ], ) def test_values(self): self.assertEqual( exp.values([(1, 2), (3, 4)], "t", ["a", "b"]).sql(), "(VALUES (1, 2), (3, 4)) AS t(a, b)", ) self.assertEqual( exp.values( [(1, 2), (3, 4)], "t", {"a": exp.DataType.build("TEXT"), "b": exp.DataType.build("TEXT")}, ).sql(), "(VALUES (1, 2), (3, 4)) AS t(a, b)", ) with self.assertRaises(ValueError): exp.values([(1, 2), (3, 4)], columns=["a"]) def test_data_type_builder(self): self.assertEqual(exp.DataType.build("TEXT").sql(), "TEXT") self.assertEqual(exp.DataType.build("DECIMAL(10, 2)").sql(), "DECIMAL(10, 2)") self.assertEqual(exp.DataType.build("VARCHAR(255)").sql(), "VARCHAR(255)") self.assertEqual(exp.DataType.build("ARRAY").sql(), "ARRAY") self.assertEqual(exp.DataType.build("CHAR").sql(), "CHAR") self.assertEqual(exp.DataType.build("NCHAR").sql(), "CHAR") self.assertEqual(exp.DataType.build("VARCHAR").sql(), "VARCHAR") self.assertEqual(exp.DataType.build("NVARCHAR").sql(), "VARCHAR") self.assertEqual(exp.DataType.build("TEXT").sql(), "TEXT") self.assertEqual(exp.DataType.build("BINARY").sql(), "BINARY") self.assertEqual(exp.DataType.build("VARBINARY").sql(), "VARBINARY") self.assertEqual(exp.DataType.build("INT").sql(), "INT") self.assertEqual(exp.DataType.build("TINYINT").sql(), "TINYINT") self.assertEqual(exp.DataType.build("SMALLINT").sql(), "SMALLINT") self.assertEqual(exp.DataType.build("BIGINT").sql(), "BIGINT") self.assertEqual(exp.DataType.build("FLOAT").sql(), "FLOAT") self.assertEqual(exp.DataType.build("DOUBLE").sql(), "DOUBLE") self.assertEqual(exp.DataType.build("DECIMAL").sql(), "DECIMAL") self.assertEqual(exp.DataType.build("BOOLEAN").sql(), "BOOLEAN") self.assertEqual(exp.DataType.build("JSON").sql(), "JSON") self.assertEqual(exp.DataType.build("JSONB", dialect="postgres").sql(), "JSONB") self.assertEqual(exp.DataType.build("INTERVAL").sql(), "INTERVAL") self.assertEqual(exp.DataType.build("TIME").sql(), "TIME") self.assertEqual(exp.DataType.build("TIMESTAMP").sql(), "TIMESTAMP") self.assertEqual(exp.DataType.build("TIMESTAMPTZ").sql(), "TIMESTAMPTZ") self.assertEqual(exp.DataType.build("TIMESTAMPLTZ").sql(), "TIMESTAMPLTZ") self.assertEqual(exp.DataType.build("DATE").sql(), "DATE") self.assertEqual(exp.DataType.build("DATETIME").sql(), "DATETIME") self.assertEqual(exp.DataType.build("ARRAY").sql(), "ARRAY") self.assertEqual(exp.DataType.build("MAP").sql(), "MAP") self.assertEqual(exp.DataType.build("UUID").sql(), "UUID") self.assertEqual(exp.DataType.build("GEOGRAPHY").sql(), "GEOGRAPHY") self.assertEqual(exp.DataType.build("GEOMETRY").sql(), "GEOMETRY") self.assertEqual(exp.DataType.build("STRUCT").sql(), "STRUCT") self.assertEqual(exp.DataType.build("NULLABLE").sql(), "NULLABLE") self.assertEqual(exp.DataType.build("HLLSKETCH", dialect="redshift").sql(), "HLLSKETCH") self.assertEqual(exp.DataType.build("HSTORE", dialect="postgres").sql(), "HSTORE") self.assertEqual(exp.DataType.build("NULL").sql(), "NULL") self.assertEqual(exp.DataType.build("NULL", dialect="bigquery").sql(), "NULL") self.assertEqual(exp.DataType.build("UNKNOWN").sql(), "UNKNOWN") self.assertEqual(exp.DataType.build("UNKNOWN", dialect="bigquery").sql(), "UNKNOWN") self.assertEqual(exp.DataType.build("UNKNOWN", dialect="snowflake").sql(), "UNKNOWN") self.assertEqual(exp.DataType.build("TIMESTAMP", dialect="bigquery").sql(), "TIMESTAMPTZ") self.assertEqual( exp.DataType.build("struct", dialect="spark").sql(), "STRUCT" ) self.assertEqual(exp.DataType.build("USER-DEFINED").sql(), "USER-DEFINED") self.assertEqual(exp.DataType.build("ARRAY").sql(), "ARRAY") self.assertEqual(exp.DataType.build("ARRAY").sql(), "ARRAY") self.assertEqual(exp.DataType.build("varchar(100) collate 'en-ci'").sql(), "VARCHAR(100)") with self.assertRaises(ParseError): exp.DataType.build("varchar(") def test_rename_table(self): self.assertEqual( exp.rename_table("t1", "t2").sql(), "ALTER TABLE t1 RENAME TO t2", ) def test_is_star(self): assert parse_one("*").is_star assert parse_one("foo.*").is_star assert parse_one("SELECT * FROM foo").is_star assert parse_one("(SELECT * FROM foo)").is_star assert parse_one("SELECT *, 1 FROM foo").is_star assert parse_one("SELECT foo.* FROM foo").is_star assert parse_one("SELECT * EXCEPT (a, b) FROM foo").is_star assert parse_one("SELECT foo.* EXCEPT (foo.a, foo.b) FROM foo").is_star assert parse_one("SELECT * REPLACE (a AS b, b AS C)").is_star assert parse_one("SELECT * EXCEPT (a, b) REPLACE (a AS b, b AS C)").is_star assert parse_one("SELECT * INTO newevent FROM event").is_star assert parse_one("SELECT * FROM foo UNION SELECT * FROM bar").is_star assert parse_one("SELECT * FROM bla UNION SELECT 1 AS x").is_star assert parse_one("SELECT 1 AS x UNION SELECT * FROM bla").is_star assert parse_one("SELECT 1 AS x UNION SELECT 1 AS x UNION SELECT * FROM foo").is_star def test_set_metadata(self): ast = parse_one("SELECT foo.col FROM foo") self.assertIsNone(ast._meta) # calling ast.meta would lazily instantiate self._meta self.assertEqual(ast.meta, {}) self.assertEqual(ast._meta, {}) ast.meta["some_meta_key"] = "some_meta_value" self.assertEqual(ast.meta.get("some_meta_key"), "some_meta_value") self.assertEqual(ast.meta.get("some_other_meta_key"), None) ast.meta["some_other_meta_key"] = "some_other_meta_value" self.assertEqual(ast.meta.get("some_other_meta_key"), "some_other_meta_value") def test_unnest(self): ast = parse_one("SELECT (((1)))") self.assertIs(ast.selects[0].unnest(), ast.find(exp.Literal)) ast = parse_one("SELECT * FROM (((SELECT * FROM t)))") self.assertIs(ast.args["from"].this.unnest(), list(ast.find_all(exp.Select))[1]) ast = parse_one("SELECT * FROM ((((SELECT * FROM t))) AS foo)") second_subquery = ast.args["from"].this.this innermost_subquery = list(ast.find_all(exp.Select))[1].parent self.assertIs(second_subquery, innermost_subquery.unwrap()) def test_is_type(self): ast = parse_one("CAST(x AS VARCHAR)") assert ast.is_type("VARCHAR") assert not ast.is_type("VARCHAR(5)") assert not ast.is_type("FLOAT") ast = parse_one("CAST(x AS VARCHAR(5))") assert ast.is_type("VARCHAR") assert ast.is_type("VARCHAR(5)") assert not ast.is_type("VARCHAR(4)") assert not ast.is_type("FLOAT") ast = parse_one("CAST(x AS ARRAY)") assert ast.is_type("ARRAY") assert ast.is_type("ARRAY") assert not ast.is_type("ARRAY") assert not ast.is_type("INT") ast = parse_one("CAST(x AS ARRAY)") assert ast.is_type("ARRAY") assert not ast.is_type("ARRAY") assert not ast.is_type("ARRAY") assert not ast.is_type("INT") ast = parse_one("CAST(x AS STRUCT)") assert ast.is_type("STRUCT") assert ast.is_type("STRUCT") assert not ast.is_type("STRUCT") dtype = exp.DataType.build("foo", udt=True) assert dtype.is_type("foo") assert not dtype.is_type("bar") dtype = exp.DataType.build("a.b.c", udt=True) assert dtype.is_type("a.b.c") with self.assertRaises(ParseError): exp.DataType.build("foo") def test_set_meta(self): query = parse_one("SELECT * FROM foo /* sqlglot.meta x = 1, y = a, z */") self.assertEqual(query.find(exp.Table).meta, {"x": "1", "y": "a", "z": True}) self.assertEqual(query.sql(), "SELECT * FROM foo /* sqlglot.meta x = 1, y = a, z */")