Merging upstream version 6.2.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

22 files changed, 312 insertions, 45 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0eba6cc..f16fc70 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,23 @@
 Changelog
 =========
 
+v6.2.0
+------
+
+Changes:
+
+- New: TSQL support
+
+- Breaking: Removed $ from tokenizer, added @ placeholders
+
+- Improvement: Nodes can now be removed in transform and replace [8cd81c3](https://github.com/tobymao/sqlglot/commit/8cd81c36561463b9849a8e0c2d70248c5b1feb62)
+
+- Improvement: Snowflake timestamp support
+
+- Improvement: Property conversion for CTAS Builder
+
+- Improvement: Tokenizers are now unique per dialect instance
+
 v6.1.0
 ------
 
diff --git a/sqlglot/__init__.py b/sqlglot/__init__.py
index 3fa40ce..44d349b 100644
--- a/sqlglot/__init__.py
+++ b/sqlglot/__init__.py
@@ -20,7 +20,7 @@ from sqlglot.generator import Generator
 from sqlglot.parser import Parser
 from sqlglot.tokens import Tokenizer, TokenType
 
-__version__ = "6.1.1"
+__version__ = "6.2.0"
 
 pretty = False
 
diff --git a/sqlglot/dialects/__init__.py b/sqlglot/dialects/__init__.py
index f7d03ad..0f80723 100644
--- a/sqlglot/dialects/__init__.py
+++ b/sqlglot/dialects/__init__.py
@@ -14,3 +14,4 @@ from sqlglot.dialects.sqlite import SQLite
 from sqlglot.dialects.starrocks import StarRocks
 from sqlglot.dialects.tableau import Tableau
 from sqlglot.dialects.trino import Trino
+from sqlglot.dialects.tsql import TSQL
diff --git a/sqlglot/dialects/dialect.py b/sqlglot/dialects/dialect.py
index f338c81..0120e71 100644
--- a/sqlglot/dialects/dialect.py
+++ b/sqlglot/dialects/dialect.py
@@ -27,6 +27,7 @@ class Dialects(str, Enum):
     STARROCKS = "starrocks"
     TABLEAU = "tableau"
     TRINO = "trino"
+    TSQL = "tsql"
 
 
 class _Dialect(type):
@@ -53,7 +54,6 @@ class _Dialect(type):
         klass.parser_class = getattr(klass, "Parser", Parser)
         klass.generator_class = getattr(klass, "Generator", Generator)
 
-        klass.tokenizer = klass.tokenizer_class()
         klass.quote_start, klass.quote_end = list(klass.tokenizer_class._QUOTES.items())[0]
         klass.identifier_start, klass.identifier_end = list(klass.tokenizer_class._IDENTIFIERS.items())[0]
 
@@ -95,7 +95,6 @@ class Dialect(metaclass=_Dialect):
     tokenizer_class = None
     parser_class = None
     generator_class = None
-    tokenizer = None
 
     @classmethod
     def get_or_raise(cls, dialect):
@@ -138,6 +137,12 @@ class Dialect(metaclass=_Dialect):
     def transpile(self, code, **opts):
         return self.generate(self.parse(code), **opts)
 
+    @property
+    def tokenizer(self):
+        if not hasattr(self, "_tokenizer"):
+            self._tokenizer = self.tokenizer_class()
+        return self._tokenizer
+
     def parser(self, **opts):
         return self.parser_class(
             **{
@@ -170,7 +175,15 @@ class Dialect(metaclass=_Dialect):
 
 
 def rename_func(name):
-    return lambda self, expression: f"{name}({csv(*[self.sql(e) for e in expression.args.values()])})"
+    def _rename(self, expression):
+        args = (
+            self.expressions(expression, flat=True)
+            if isinstance(expression, exp.Func) and expression.is_var_len_args
+            else csv(*[self.sql(e) for e in expression.args.values()])
+        )
+        return f"{name}({args})"
+
+    return _rename
 
 
 def approx_count_distinct_sql(self, expression):
diff --git a/sqlglot/dialects/duckdb.py b/sqlglot/dialects/duckdb.py
index ff3a8b1..4ca9e84 100644
--- a/sqlglot/dialects/duckdb.py
+++ b/sqlglot/dialects/duckdb.py
@@ -108,7 +108,7 @@ class DuckDB(Dialect):
         TRANSFORMS = {
             **Generator.TRANSFORMS,
             exp.ApproxDistinct: approx_count_distinct_sql,
-            exp.Array: lambda self, e: f"LIST_VALUE({self.expressions(e, flat=True)})",
+            exp.Array: rename_func("LIST_VALUE"),
             exp.ArraySize: rename_func("ARRAY_LENGTH"),
             exp.ArraySort: _array_sort_sql,
             exp.ArraySum: rename_func("LIST_SUM"),
diff --git a/sqlglot/dialects/snowflake.py b/sqlglot/dialects/snowflake.py
index 8d6ee78..b5d4f0a 100644
--- a/sqlglot/dialects/snowflake.py
+++ b/sqlglot/dialects/snowflake.py
@@ -106,6 +106,11 @@ class Snowflake(Dialect):
             "TO_TIMESTAMP": _snowflake_to_timestamp,
         }
 
+        FUNCTION_PARSERS = {
+            **Parser.FUNCTION_PARSERS,
+            "DATE_PART": lambda self: self._parse_extract(),
+        }
+
         COLUMN_OPERATORS = {
             **Parser.COLUMN_OPERATORS,
             TokenType.COLON: lambda self, this, path: self.expression(
@@ -118,10 +123,20 @@ class Snowflake(Dialect):
     class Tokenizer(Tokenizer):
         QUOTES = ["'", "$$"]
         ESCAPE = "\\"
+
+        SINGLE_TOKENS = {
+            **Tokenizer.SINGLE_TOKENS,
+            "$": TokenType.DOLLAR,  # needed to break for quotes
+        }
+
         KEYWORDS = {
             **Tokenizer.KEYWORDS,
             "QUALIFY": TokenType.QUALIFY,
             "DOUBLE PRECISION": TokenType.DOUBLE,
+            "TIMESTAMP_LTZ": TokenType.TIMESTAMPLTZ,
+            "TIMESTAMP_NTZ": TokenType.TIMESTAMP,
+            "TIMESTAMP_TZ": TokenType.TIMESTAMPTZ,
+            "TIMESTAMPNTZ": TokenType.TIMESTAMP,
         }
 
     class Generator(Generator):
@@ -132,6 +147,11 @@ class Snowflake(Dialect):
             exp.UnixToTime: _unix_to_time,
         }
 
+        TYPE_MAPPING = {
+            **Generator.TYPE_MAPPING,
+            exp.DataType.Type.TIMESTAMP: "TIMESTAMPNTZ",
+        }
+
         def except_op(self, expression):
             if not expression.args.get("distinct", False):
                 self.unsupported("EXCEPT with All is not supported in Snowflake")
diff --git a/sqlglot/dialects/spark.py b/sqlglot/dialects/spark.py
index a331191..c051178 100644
--- a/sqlglot/dialects/spark.py
+++ b/sqlglot/dialects/spark.py
@@ -82,6 +82,7 @@ class Spark(Hive):
 
         TRANSFORMS = {
             **{k: v for k, v in Hive.Generator.TRANSFORMS.items() if k not in {exp.ArraySort}},
+            exp.FileFormatProperty: lambda self, e: f"USING {e.text('value').upper()}",
             exp.ArraySum: lambda self, e: f"AGGREGATE({self.sql(e, 'this')}, 0, (acc, x) -> acc + x, acc -> acc)",
             exp.BitwiseLeftShift: rename_func("SHIFTLEFT"),
             exp.BitwiseRightShift: rename_func("SHIFTRIGHT"),
diff --git a/sqlglot/dialects/tsql.py b/sqlglot/dialects/tsql.py
new file mode 100644
index 0000000..68bb9bd
--- /dev/null
+++ b/sqlglot/dialects/tsql.py
@@ -0,0 +1,38 @@
+from sqlglot import exp
+from sqlglot.dialects.dialect import Dialect
+from sqlglot.generator import Generator
+from sqlglot.tokens import Tokenizer, TokenType
+
+
+class TSQL(Dialect):
+    null_ordering = "nulls_are_small"
+    time_format = "'yyyy-mm-dd hh:mm:ss'"
+
+    class Tokenizer(Tokenizer):
+        IDENTIFIERS = ['"', ("[", "]")]
+
+        KEYWORDS = {
+            **Tokenizer.KEYWORDS,
+            "BIT": TokenType.BOOLEAN,
+            "REAL": TokenType.FLOAT,
+            "NTEXT": TokenType.TEXT,
+            "SMALLDATETIME": TokenType.DATETIME,
+            "DATETIMEOFFSET": TokenType.TIMESTAMPTZ,
+            "TIME": TokenType.TIMESTAMP,
+            "VARBINARY": TokenType.BINARY,
+            "IMAGE": TokenType.IMAGE,
+            "MONEY": TokenType.MONEY,
+            "SMALLMONEY": TokenType.SMALLMONEY,
+            "ROWVERSION": TokenType.ROWVERSION,
+            "SQL_VARIANT": TokenType.SQL_VARIANT,
+            "UNIQUEIDENTIFIER": TokenType.UNIQUEIDENTIFIER,
+            "XML": TokenType.XML,
+        }
+
+    class Generator(Generator):
+        TYPE_MAPPING = {
+            **Generator.TYPE_MAPPING,
+            exp.DataType.Type.BOOLEAN: "BIT",
+            exp.DataType.Type.INT: "INTEGER",
+            exp.DataType.Type.DECIMAL: "NUMERIC",
+        }
diff --git a/sqlglot/expressions.py b/sqlglot/expressions.py
index b983bf9..9299132 100644
--- a/sqlglot/expressions.py
+++ b/sqlglot/expressions.py
@@ -1,4 +1,5 @@
 import inspect
+import numbers
 import re
 import sys
 from collections import deque
@@ -6,7 +7,7 @@ from copy import deepcopy
 from enum import auto
 
 from sqlglot.errors import ParseError
-from sqlglot.helper import AutoName, camel_to_snake_case, ensure_list
+from sqlglot.helper import AutoName, camel_to_snake_case, ensure_list, list_get
 
 
 class _Expression(type):
@@ -350,7 +351,8 @@ class Expression(metaclass=_Expression):
 
         Args:
             fun (function): a function which takes a node as an argument and returns a
-                new transformed node or the same node without modifications.
+                new transformed node or the same node without modifications. If the function
+                returns None, then the corresponding node will be removed from the syntax tree.
             copy (bool): if set to True a new tree instance is constructed, otherwise the tree is
                 modified in place.
 
@@ -360,9 +362,7 @@ class Expression(metaclass=_Expression):
         node = self.copy() if copy else self
         new_node = fun(node, *args, **kwargs)
 
-        if new_node is None:
-            raise ValueError("A transformed node cannot be None")
-        if not isinstance(new_node, Expression):
+        if new_node is None or not isinstance(new_node, Expression):
             return new_node
         if new_node is not node:
             new_node.parent = node.parent
@@ -843,10 +843,6 @@ class Ordered(Expression):
     arg_types = {"this": True, "desc": True, "nulls_first": True}
 
 
-class Properties(Expression):
-    arg_types = {"expressions": True}
-
-
 class Property(Expression):
     arg_types = {"this": True, "value": True}
 
@@ -891,6 +887,42 @@ class AnonymousProperty(Property):
     pass
 
 
+class Properties(Expression):
+    arg_types = {"expressions": True}
+
+    PROPERTY_KEY_MAPPING = {
+        "AUTO_INCREMENT": AutoIncrementProperty,
+        "CHARACTER_SET": CharacterSetProperty,
+        "COLLATE": CollateProperty,
+        "COMMENT": SchemaCommentProperty,
+        "ENGINE": EngineProperty,
+        "FORMAT": FileFormatProperty,
+        "LOCATION": LocationProperty,
+        "PARTITIONED_BY": PartitionedByProperty,
+        "TABLE_FORMAT": TableFormatProperty,
+    }
+
+    @classmethod
+    def from_dict(cls, properties_dict):
+        expressions = []
+        for key, value in properties_dict.items():
+            property_cls = cls.PROPERTY_KEY_MAPPING.get(key.upper(), AnonymousProperty)
+            expressions.append(property_cls(this=Literal.string(key), value=cls._convert_value(value)))
+        return cls(expressions=expressions)
+
+    @staticmethod
+    def _convert_value(value):
+        if isinstance(value, Expression):
+            return value
+        if isinstance(value, str):
+            return Literal.string(value)
+        if isinstance(value, numbers.Number):
+            return Literal.number(value)
+        if isinstance(value, list):
+            return Tuple(expressions=[_convert_value(v) for v in value])
+        raise ValueError(f"Unsupported type '{type(value)}' for value '{value}'")
+
+
 class Qualify(Expression):
     pass
 
@@ -1562,15 +1594,7 @@ class Select(Subqueryable, Expression):
         )
         properties_expression = None
         if properties:
-            properties_str = " ".join(
-                [f"{k} = '{v}'" if isinstance(v, str) else f"{k} = {v}" for k, v in properties.items()]
-            )
-            properties_expression = maybe_parse(
-                properties_str,
-                into=Properties,
-                dialect=dialect,
-                **opts,
-            )
+            properties_expression = Properties.from_dict(properties)
 
         return Create(
             this=table_expression,
@@ -1650,6 +1674,10 @@ class Star(Expression):
         return "*"
 
 
+class Parameter(Expression):
+    pass
+
+
 class Placeholder(Expression):
     arg_types = {}
 
@@ -1688,6 +1716,7 @@ class DataType(Expression):
         INTERVAL = auto()
         TIMESTAMP = auto()
         TIMESTAMPTZ = auto()
+        TIMESTAMPLTZ = auto()
         DATE = auto()
         DATETIME = auto()
         ARRAY = auto()
@@ -1702,6 +1731,13 @@ class DataType(Expression):
         SERIAL = auto()
         SMALLSERIAL = auto()
         BIGSERIAL = auto()
+        XML = auto()
+        UNIQUEIDENTIFIER = auto()
+        MONEY = auto()
+        SMALLMONEY = auto()
+        ROWVERSION = auto()
+        IMAGE = auto()
+        SQL_VARIANT = auto()
 
     @classmethod
     def build(cls, dtype, **kwargs):
@@ -2976,7 +3012,7 @@ def replace_children(expression, fun):
             else:
                 new_child_nodes.append(cn)
 
-        expression.args[k] = new_child_nodes if is_list_arg else new_child_nodes[0]
+        expression.args[k] = new_child_nodes if is_list_arg else list_get(new_child_nodes, 0)
 
 
 def column_table_names(expression):
diff --git a/sqlglot/generator.py b/sqlglot/generator.py
index a445178..d264e59 100644
--- a/sqlglot/generator.py
+++ b/sqlglot/generator.py
@@ -748,6 +748,9 @@ class Generator:
     def structkwarg_sql(self, expression):
         return f"{self.sql(expression, 'this')} {self.sql(expression, 'expression')}"
 
+    def parameter_sql(self, expression):
+        return f"@{self.sql(expression, 'this')}"
+
     def placeholder_sql(self, *_):
         return "?"
 
@@ -903,7 +906,7 @@ class Generator:
         return f"UNIQUE ({columns})"
 
     def if_sql(self, expression):
-        return self.case_sql(exp.Case(ifs=[expression], default=expression.args.get("false")))
+        return self.case_sql(exp.Case(ifs=[expression.copy()], default=expression.args.get("false")))
 
     def in_sql(self, expression):
         query = expression.args.get("query")
diff --git a/sqlglot/parser.py b/sqlglot/parser.py
index f46bafe..6ad6391 100644
--- a/sqlglot/parser.py
+++ b/sqlglot/parser.py
@@ -81,6 +81,7 @@ class Parser:
         TokenType.INTERVAL,
         TokenType.TIMESTAMP,
         TokenType.TIMESTAMPTZ,
+        TokenType.TIMESTAMPLTZ,
         TokenType.DATETIME,
         TokenType.DATE,
         TokenType.DECIMAL,
@@ -92,6 +93,13 @@ class Parser:
         TokenType.SERIAL,
         TokenType.SMALLSERIAL,
         TokenType.BIGSERIAL,
+        TokenType.XML,
+        TokenType.UNIQUEIDENTIFIER,
+        TokenType.MONEY,
+        TokenType.SMALLMONEY,
+        TokenType.ROWVERSION,
+        TokenType.IMAGE,
+        TokenType.SQL_VARIANT,
         *NESTED_TYPE_TOKENS,
     }
 
@@ -233,6 +241,7 @@ class Parser:
     TIMESTAMPS = {
         TokenType.TIMESTAMP,
         TokenType.TIMESTAMPTZ,
+        TokenType.TIMESTAMPLTZ,
     }
 
     SET_OPERATIONS = {
@@ -315,6 +324,7 @@ class Parser:
         TokenType.TRUE: lambda *_: exp.Boolean(this=True),
         TokenType.FALSE: lambda *_: exp.Boolean(this=False),
         TokenType.PLACEHOLDER: lambda *_: exp.Placeholder(),
+        TokenType.PARAMETER: lambda self, _: exp.Parameter(this=self._parse_var() or self._parse_primary()),
         TokenType.BIT_STRING: lambda _, token: exp.BitString(this=token.text),
         TokenType.HEX_STRING: lambda _, token: exp.HexString(this=token.text),
         TokenType.INTRODUCER: lambda self, token: self.expression(
@@ -1497,12 +1507,19 @@ class Parser:
 
         if type_token in self.TIMESTAMPS:
             tz = self._match(TokenType.WITH_TIME_ZONE) or type_token == TokenType.TIMESTAMPTZ
-            self._match(TokenType.WITHOUT_TIME_ZONE)
             if tz:
                 return exp.DataType(
                     this=exp.DataType.Type.TIMESTAMPTZ,
                     expressions=expressions,
                 )
+            ltz = self._match(TokenType.WITH_LOCAL_TIME_ZONE) or type_token == TokenType.TIMESTAMPLTZ
+            if ltz:
+                return exp.DataType(
+                    this=exp.DataType.Type.TIMESTAMPLTZ,
+                    expressions=expressions,
+                )
+            self._match(TokenType.WITHOUT_TIME_ZONE)
+
             return exp.DataType(
                 this=exp.DataType.Type.TIMESTAMP,
                 expressions=expressions,
@@ -1845,8 +1862,11 @@ class Parser:
     def _parse_extract(self):
         this = self._parse_var() or self._parse_type()
 
-        if not self._match(TokenType.FROM):
-            self.raise_error("Expected FROM after EXTRACT", self._prev)
+        if self._match(TokenType.FROM):
+            return self.expression(exp.Extract, this=this, expression=self._parse_bitwise())
+
+        if not self._match(TokenType.COMMA):
+            self.raise_error("Expected FROM or comma after EXTRACT", self._prev)
 
         return self.expression(exp.Extract, this=this, expression=self._parse_bitwise())
 
diff --git a/sqlglot/tokens.py b/sqlglot/tokens.py
index bd95bc7..7a50fc3 100644
--- a/sqlglot/tokens.py
+++ b/sqlglot/tokens.py
@@ -41,6 +41,7 @@ class TokenType(AutoName):
     LR_ARROW = auto()
     ANNOTATION = auto()
     DOLLAR = auto()
+    PARAMETER = auto()
 
     SPACE = auto()
     BREAK = auto()
@@ -75,6 +76,7 @@ class TokenType(AutoName):
     JSON = auto()
     TIMESTAMP = auto()
     TIMESTAMPTZ = auto()
+    TIMESTAMPLTZ = auto()
     DATETIME = auto()
     DATE = auto()
     UUID = auto()
@@ -86,6 +88,13 @@ class TokenType(AutoName):
     SERIAL = auto()
     SMALLSERIAL = auto()
     BIGSERIAL = auto()
+    XML = auto()
+    UNIQUEIDENTIFIER = auto()
+    MONEY = auto()
+    SMALLMONEY = auto()
+    ROWVERSION = auto()
+    IMAGE = auto()
+    SQL_VARIANT = auto()
 
     # keywords
     ADD_FILE = auto()
@@ -247,6 +256,7 @@ class TokenType(AutoName):
     WINDOW = auto()
     WITH = auto()
     WITH_TIME_ZONE = auto()
+    WITH_LOCAL_TIME_ZONE = auto()
     WITHIN_GROUP = auto()
     WITHOUT_TIME_ZONE = auto()
     UNIQUE = auto()
@@ -340,7 +350,7 @@ class Tokenizer(metaclass=_Tokenizer):
         "~": TokenType.TILDA,
         "?": TokenType.PLACEHOLDER,
         "#": TokenType.ANNOTATION,
-        "$": TokenType.DOLLAR,
+        "@": TokenType.PARAMETER,
         # used for breaking a var like x'y' but nothing else
         # the token type doesn't matter
         "'": TokenType.QUOTE,
@@ -520,6 +530,7 @@ class Tokenizer(metaclass=_Tokenizer):
         "WHERE": TokenType.WHERE,
         "WITH": TokenType.WITH,
         "WITH TIME ZONE": TokenType.WITH_TIME_ZONE,
+        "WITH LOCAL TIME ZONE": TokenType.WITH_LOCAL_TIME_ZONE,
         "WITHIN GROUP": TokenType.WITHIN_GROUP,
         "WITHOUT TIME ZONE": TokenType.WITHOUT_TIME_ZONE,
         "ARRAY": TokenType.ARRAY,
@@ -561,6 +572,7 @@ class Tokenizer(metaclass=_Tokenizer):
         "BYTEA": TokenType.BINARY,
         "TIMESTAMP": TokenType.TIMESTAMP,
         "TIMESTAMPTZ": TokenType.TIMESTAMPTZ,
+        "TIMESTAMPLTZ": TokenType.TIMESTAMPLTZ,
         "DATE": TokenType.DATE,
         "DATETIME": TokenType.DATETIME,
         "UNIQUE": TokenType.UNIQUE,
diff --git a/tests/dialects/test_dialect.py b/tests/dialects/test_dialect.py
index 6b7bfd3..4e0a3c6 100644
--- a/tests/dialects/test_dialect.py
+++ b/tests/dialects/test_dialect.py
@@ -228,6 +228,7 @@ class TestDialect(Validator):
                 "duckdb": "STRPTIME(x, '%Y-%m-%dT%H:%M:%S')",
                 "hive": "CAST(FROM_UNIXTIME(UNIX_TIMESTAMP(x, 'yyyy-MM-ddTHH:mm:ss')) AS TIMESTAMP)",
                 "presto": "DATE_PARSE(x, '%Y-%m-%dT%H:%i:%S')",
+                "redshift": "TO_TIMESTAMP(x, 'YYYY-MM-DDTHH:MI:SS')",
                 "spark": "TO_TIMESTAMP(x, 'yyyy-MM-ddTHH:mm:ss')",
             },
         )
@@ -237,6 +238,7 @@ class TestDialect(Validator):
                 "duckdb": "STRPTIME('2020-01-01', '%Y-%m-%d')",
                 "hive": "CAST('2020-01-01' AS TIMESTAMP)",
                 "presto": "DATE_PARSE('2020-01-01', '%Y-%m-%d')",
+                "redshift": "TO_TIMESTAMP('2020-01-01', 'YYYY-MM-DD')",
                 "spark": "TO_TIMESTAMP('2020-01-01', 'yyyy-MM-dd')",
             },
         )
@@ -246,6 +248,7 @@ class TestDialect(Validator):
                 "duckdb": "STRPTIME(x, '%y')",
                 "hive": "CAST(FROM_UNIXTIME(UNIX_TIMESTAMP(x, 'yy')) AS TIMESTAMP)",
                 "presto": "DATE_PARSE(x, '%y')",
+                "redshift": "TO_TIMESTAMP(x, 'YY')",
                 "spark": "TO_TIMESTAMP(x, 'yy')",
             },
         )
@@ -287,6 +290,7 @@ class TestDialect(Validator):
                 "duckdb": "STRFTIME(x, '%Y-%m-%d')",
                 "hive": "DATE_FORMAT(x, 'yyyy-MM-dd')",
                 "presto": "DATE_FORMAT(x, '%Y-%m-%d')",
+                "redshift": "TO_CHAR(x, 'YYYY-MM-DD')",
             },
         )
         self.validate_all(
@@ -295,6 +299,7 @@ class TestDialect(Validator):
                 "duckdb": "CAST(x AS TEXT)",
                 "hive": "CAST(x AS STRING)",
                 "presto": "CAST(x AS VARCHAR)",
+                "redshift": "CAST(x AS TEXT)",
             },
         )
         self.validate_all(
diff --git a/tests/dialects/test_duckdb.py b/tests/dialects/test_duckdb.py
index 501301f..f52decb 100644
--- a/tests/dialects/test_duckdb.py
+++ b/tests/dialects/test_duckdb.py
@@ -66,6 +66,9 @@ class TestDuckDB(Validator):
     def test_duckdb(self):
         self.validate_all(
             "LIST_VALUE(0, 1, 2)",
+            read={
+                "spark": "ARRAY(0, 1, 2)",
+            },
             write={
                 "bigquery": "[0, 1, 2]",
                 "duckdb": "LIST_VALUE(0, 1, 2)",
diff --git a/tests/dialects/test_hive.py b/tests/dialects/test_hive.py
index 55086e3..a9b5168 100644
--- a/tests/dialects/test_hive.py
+++ b/tests/dialects/test_hive.py
@@ -131,7 +131,7 @@ class TestHive(Validator):
             write={
                 "presto": "CREATE TABLE test WITH (FORMAT = 'parquet', x = '1', Z = '2') AS SELECT 1",
                 "hive": "CREATE TABLE test STORED AS PARQUET TBLPROPERTIES ('x' = '1', 'Z' = '2') AS SELECT 1",
-                "spark": "CREATE TABLE test STORED AS PARQUET TBLPROPERTIES ('x' = '1', 'Z' = '2') AS SELECT 1",
+                "spark": "CREATE TABLE test USING PARQUET TBLPROPERTIES ('x' = '1', 'Z' = '2') AS SELECT 1",
             },
         )
         self.validate_all(
diff --git a/tests/dialects/test_oracle.py b/tests/dialects/test_oracle.py
new file mode 100644
index 0000000..1fadb84
--- /dev/null
+++ b/tests/dialects/test_oracle.py
@@ -0,0 +1,6 @@
+from tests.dialects.test_dialect import Validator
+
+
+class TestOracle(Validator):
+    def test_oracle(self):
+        self.validate_identity("SELECT * FROM V$SESSION")
diff --git a/tests/dialects/test_presto.py b/tests/dialects/test_presto.py
index eb9aa5c..96c299d 100644
--- a/tests/dialects/test_presto.py
+++ b/tests/dialects/test_presto.py
@@ -173,7 +173,7 @@ class TestPresto(Validator):
             write={
                 "presto": "CREATE TABLE test WITH (FORMAT = 'PARQUET') AS SELECT 1",
                 "hive": "CREATE TABLE test STORED AS PARQUET AS SELECT 1",
-                "spark": "CREATE TABLE test STORED AS PARQUET AS SELECT 1",
+                "spark": "CREATE TABLE test USING PARQUET AS SELECT 1",
             },
         )
         self.validate_all(
@@ -181,7 +181,7 @@ class TestPresto(Validator):
             write={
                 "presto": "CREATE TABLE test WITH (FORMAT = 'PARQUET', X = '1', Z = '2') AS SELECT 1",
                 "hive": "CREATE TABLE test STORED AS PARQUET TBLPROPERTIES ('X' = '1', 'Z' = '2') AS SELECT 1",
-                "spark": "CREATE TABLE test STORED AS PARQUET TBLPROPERTIES ('X' = '1', 'Z' = '2') AS SELECT 1",
+                "spark": "CREATE TABLE test USING PARQUET TBLPROPERTIES ('X' = '1', 'Z' = '2') AS SELECT 1",
             },
         )
         self.validate_all(
diff --git a/tests/dialects/test_snowflake.py b/tests/dialects/test_snowflake.py
index 2eeff52..165f8e2 100644
--- a/tests/dialects/test_snowflake.py
+++ b/tests/dialects/test_snowflake.py
@@ -175,3 +175,48 @@ class TestSnowflake(Validator):
                 "snowflake": r"SELECT FIRST_VALUE(TABLE1.COLUMN1) IGNORE NULLS OVER (PARTITION BY RANDOM_COLUMN1, RANDOM_COLUMN2 ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) AS MY_ALIAS FROM TABLE1"
             },
         )
+
+    def test_timestamps(self):
+        self.validate_all(
+            "SELECT CAST(a AS TIMESTAMP)",
+            write={
+                "snowflake": "SELECT CAST(a AS TIMESTAMPNTZ)",
+            },
+        )
+        self.validate_all(
+            "SELECT a::TIMESTAMP_LTZ(9)",
+            write={
+                "snowflake": "SELECT CAST(a AS TIMESTAMPLTZ(9))",
+            },
+        )
+        self.validate_all(
+            "SELECT a::TIMESTAMPLTZ",
+            write={
+                "snowflake": "SELECT CAST(a AS TIMESTAMPLTZ)",
+            },
+        )
+        self.validate_all(
+            "SELECT a::TIMESTAMP WITH LOCAL TIME ZONE",
+            write={
+                "snowflake": "SELECT CAST(a AS TIMESTAMPLTZ)",
+            },
+        )
+        self.validate_identity("SELECT EXTRACT(month FROM a)")
+        self.validate_all(
+            "SELECT EXTRACT('month', a)",
+            write={
+                "snowflake": "SELECT EXTRACT('month' FROM a)",
+            },
+        )
+        self.validate_all(
+            "SELECT DATE_PART('month', a)",
+            write={
+                "snowflake": "SELECT EXTRACT('month' FROM a)",
+            },
+        )
+        self.validate_all(
+            "SELECT DATE_PART(month FROM a::DATETIME)",
+            write={
+                "snowflake": "SELECT EXTRACT(month FROM CAST(a AS DATETIME))",
+            },
+        )
diff --git a/tests/dialects/test_spark.py b/tests/dialects/test_spark.py
index 8794fed..22f6947 100644
--- a/tests/dialects/test_spark.py
+++ b/tests/dialects/test_spark.py
@@ -44,15 +44,7 @@ class TestSpark(Validator):
             write={
                 "presto": "CREATE TABLE test WITH (FORMAT = 'PARQUET') AS SELECT 1",
                 "hive": "CREATE TABLE test STORED AS PARQUET AS SELECT 1",
-                "spark": "CREATE TABLE test STORED AS PARQUET AS SELECT 1",
-            },
-        )
-        self.validate_all(
-            "CREATE TABLE test USING ICEBERG STORED AS PARQUET AS SELECT 1",
-            write={
-                "presto": "CREATE TABLE test WITH (TABLE_FORMAT = 'ICEBERG', FORMAT = 'PARQUET') AS SELECT 1",
-                "hive": "CREATE TABLE test USING ICEBERG STORED AS PARQUET AS SELECT 1",
-                "spark": "CREATE TABLE test USING ICEBERG STORED AS PARQUET AS SELECT 1",
+                "spark": "CREATE TABLE test USING PARQUET AS SELECT 1",
             },
         )
         self.validate_all(
@@ -86,7 +78,7 @@ COMMENT 'Test comment: blah'
 PARTITIONED BY (
   date STRING
 )
-STORED AS ICEBERG
+USING ICEBERG
 TBLPROPERTIES (
   'x' = '1'
 )""",
diff --git a/tests/dialects/test_tsql.py b/tests/dialects/test_tsql.py
new file mode 100644
index 0000000..0619eaa
--- /dev/null
+++ b/tests/dialects/test_tsql.py
@@ -0,0 +1,26 @@
+from tests.dialects.test_dialect import Validator
+
+
+class TestTSQL(Validator):
+    dialect = "tsql"
+
+    def test_tsql(self):
+        self.validate_identity('SELECT "x"."y" FROM foo')
+
+        self.validate_all(
+            "SELECT CAST([a].[b] AS SMALLINT) FROM foo",
+            write={
+                "tsql": 'SELECT CAST("a"."b" AS SMALLINT) FROM foo',
+                "spark": "SELECT CAST(`a`.`b` AS SHORT) FROM foo",
+            },
+        )
+
+    def test_types(self):
+        self.validate_identity("CAST(x AS XML)")
+        self.validate_identity("CAST(x AS UNIQUEIDENTIFIER)")
+        self.validate_identity("CAST(x AS MONEY)")
+        self.validate_identity("CAST(x AS SMALLMONEY)")
+        self.validate_identity("CAST(x AS ROWVERSION)")
+        self.validate_identity("CAST(x AS IMAGE)")
+        self.validate_identity("CAST(x AS SQL_VARIANT)")
+        self.validate_identity("CAST(x AS BIT)")
diff --git a/tests/test_expressions.py b/tests/test_expressions.py
index 716e457..59d584c 100644
--- a/tests/test_expressions.py
+++ b/tests/test_expressions.py
@@ -224,9 +224,6 @@ class TestExpressions(unittest.TestCase):
         self.assertEqual(actual_expression_2.sql(dialect="presto"), "IF(c - 2 > 0, c - 2, b)")
         self.assertIs(actual_expression_2, expression)
 
-        with self.assertRaises(ValueError):
-            parse_one("a").transform(lambda n: None)
-
     def test_transform_no_infinite_recursion(self):
         expression = parse_one("a")
 
@@ -247,6 +244,35 @@ class TestExpressions(unittest.TestCase):
 
         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"))
diff --git a/tests/test_parser.py b/tests/test_parser.py
index 1054103..9e430e2 100644
--- a/tests/test_parser.py
+++ b/tests/test_parser.py
@@ -114,6 +114,9 @@ class TestParser(unittest.TestCase):
         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_annotations(self):
         expression = parse_one(
             """