Merging upstream version 10.6.3.

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

sqlglot/optimizer/eliminate_subqueries.py

@@ -114,7 +114,7 @@ def _eliminate_union(scope, existing_ctes, taken):
     taken[alias] = scope
 
     # Try to maintain the selections
-    expressions = scope.expression.args.get("expressions")
+    expressions = scope.selects
     selects = [
         exp.alias_(exp.column(e.alias_or_name, table=alias), alias=e.alias_or_name)
         for e in expressions

sqlglot/optimizer/scope.py

@@ -300,7 +300,7 @@ class Scope:
             list[exp.Expression]: expressions
         """
         if isinstance(self.expression, exp.Union):
-            return []
+            return self.expression.unnest().selects
         return self.expression.selects
 
     @property

sqlglot/optimizer/simplify.py

@@ -456,8 +456,10 @@ def extract_interval(interval):
 
 
 def date_literal(date):
-    expr_type = exp.DataType.build("DATETIME" if isinstance(date, datetime.datetime) else "DATE")
-    return exp.Cast(this=exp.Literal.string(date), to=expr_type)
+    return exp.cast(
+        exp.Literal.string(date),
+        "DATETIME" if isinstance(date, datetime.datetime) else "DATE",
+    )
 
 
 def boolean_literal(condition):