Adding upstream version 18.2.0.

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

sqlglot/transforms.py

@@ -68,11 +68,17 @@ def eliminate_distinct_on(expression: exp.Expression) -> exp.Expression:
 
         if order:
             window.set("order", order.pop().copy())
+        else:
+            window.set("order", exp.Order(expressions=[c.copy() for c in distinct_cols]))
 
         window = exp.alias_(window, row_number)
         expression.select(window, copy=False)
 
-        return exp.select(*outer_selects).from_(expression.subquery()).where(f'"{row_number}" = 1')
+        return (
+            exp.select(*outer_selects)
+            .from_(expression.subquery())
+            .where(exp.column(row_number).eq(1))
+        )
 
     return expression
 
@@ -126,7 +132,7 @@ def remove_precision_parameterized_types(expression: exp.Expression) -> exp.Expr
     """
     for node in expression.find_all(exp.DataType):
         node.set(
-            "expressions", [e for e in node.expressions if not isinstance(e, exp.DataTypeSize)]
+            "expressions", [e for e in node.expressions if not isinstance(e, exp.DataTypeParam)]
         )
 
     return expression