Adding upstream version 6.0.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

sqlglot/dialects/clickhouse.py

@@ -0,0 +1,48 @@
+from sqlglot import exp
+from sqlglot.dialects.dialect import Dialect, inline_array_sql
+from sqlglot.generator import Generator
+from sqlglot.parser import Parser
+from sqlglot.tokens import Tokenizer, TokenType
+
+
+class ClickHouse(Dialect):
+    normalize_functions = None
+    null_ordering = "nulls_are_last"
+
+    class Tokenizer(Tokenizer):
+        IDENTIFIERS = ['"', "`"]
+
+        KEYWORDS = {
+            **Tokenizer.KEYWORDS,
+            "NULLABLE": TokenType.NULLABLE,
+            "FINAL": TokenType.FINAL,
+            "INT8": TokenType.TINYINT,
+            "INT16": TokenType.SMALLINT,
+            "INT32": TokenType.INT,
+            "INT64": TokenType.BIGINT,
+            "FLOAT32": TokenType.FLOAT,
+            "FLOAT64": TokenType.DOUBLE,
+        }
+
+    class Parser(Parser):
+        def _parse_table(self, schema=False):
+            this = super()._parse_table(schema)
+
+            if self._match(TokenType.FINAL):
+                this = self.expression(exp.Final, this=this)
+
+            return this
+
+    class Generator(Generator):
+        STRUCT_DELIMITER = ("(", ")")
+
+        TYPE_MAPPING = {
+            **Generator.TYPE_MAPPING,
+            exp.DataType.Type.NULLABLE: "Nullable",
+        }
+
+        TRANSFORMS = {
+            **Generator.TRANSFORMS,
+            exp.Array: inline_array_sql,
+            exp.Final: lambda self, e: f"{self.sql(e, 'this')} FINAL",
+        }