Merging upstream version 20.3.0.

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

sqlglot/expressions.py

@@ -1105,14 +1105,7 @@ class Create(DDL):
 # https://cloud.google.com/bigquery/docs/reference/standard-sql/data-definition-language#create_table_clone_statement
 # https://cloud.google.com/bigquery/docs/reference/standard-sql/data-definition-language#create_table_copy
 class Clone(Expression):
-    arg_types = {
-        "this": True,
-        "when": False,
-        "kind": False,
-        "shallow": False,
-        "expression": False,
-        "copy": False,
-    }
+    arg_types = {"this": True, "shallow": False, "copy": False}
 
 
 class Describe(Expression):
@@ -1213,6 +1206,10 @@ class RawString(Condition):
     pass
 
 
+class UnicodeString(Condition):
+    arg_types = {"this": True, "escape": False}
+
+
 class Column(Condition):
     arg_types = {"this": True, "table": False, "db": False, "catalog": False, "join_mark": False}
 
@@ -1967,7 +1964,12 @@ class Offset(Expression):
 
 
 class Order(Expression):
-    arg_types = {"this": False, "expressions": True}
+    arg_types = {"this": False, "expressions": True, "interpolate": False}
+
+
+# https://clickhouse.com/docs/en/sql-reference/statements/select/order-by#order-by-expr-with-fill-modifier
+class WithFill(Expression):
+    arg_types = {"from": False, "to": False, "step": False}
 
 
 # hive specific sorts
@@ -1985,7 +1987,7 @@ class Sort(Order):
 
 
 class Ordered(Expression):
-    arg_types = {"this": True, "desc": False, "nulls_first": True}
+    arg_types = {"this": True, "desc": False, "nulls_first": True, "with_fill": False}
 
 
 class Property(Expression):
@@ -2522,6 +2524,11 @@ class IndexTableHint(Expression):
     arg_types = {"this": True, "expressions": False, "target": False}
 
 
+# https://docs.snowflake.com/en/sql-reference/constructs/at-before
+class HistoricalData(Expression):
+    arg_types = {"this": True, "kind": True, "expression": True}
+
+
 class Table(Expression):
     arg_types = {
         "this": True,
@@ -2538,6 +2545,7 @@ class Table(Expression):
         "pattern": False,
         "index": False,
         "ordinality": False,
+        "when": False,
     }
 
     @property
@@ -4310,6 +4318,11 @@ class Array(Func):
     is_var_len_args = True
 
 
+# https://docs.snowflake.com/en/sql-reference/functions/to_array
+class ToArray(Func):
+    pass
+
+
 # https://docs.snowflake.com/en/sql-reference/functions/to_char
 # https://docs.oracle.com/en/database/oracle/oracle-database/23/sqlrf/TO_CHAR-number.html
 class ToChar(Func):
@@ -5233,6 +5246,19 @@ class UnixToTimeStr(Func):
     pass
 
 
+class TimestampFromParts(Func):
+    """Constructs a timestamp given its constituent parts."""
+
+    arg_types = {
+        "year": True,
+        "month": True,
+        "day": True,
+        "hour": True,
+        "min": True,
+        "sec": True,
+    }
+
+
 class Upper(Func):
     _sql_names = ["UPPER", "UCASE"]