chore: use generated names

Author: cpcloud

ibis/backends/polars/compiler.py

@@ -1258,37 +1258,49 @@ def execute_union(op, **kw):
 
 @translate.register(ops.Intersection)
 def execute_intersection(op, *, ctx, **kw):
+    left = gen_name("polars_intersect_left")
+    right = gen_name("polars_intersect_right")
+
     ctx.register_many(
         frames={
-            "left": translate(op.left, ctx=ctx **kw),
-            "right": translate(op.right, ctx=ctx, **kw),
+            left: translate(op.left, ctx=ctx, **kw),
+            right: translate(op.right, ctx=ctx, **kw),
         }
     )
+
     sql = (
         sg.select(STAR)
-        .from_(sg.to_identifier("left", quoted=True))
-        .intersect(sg.select(STAR).from_(sg.to_identifier("right", quoted=True)))
+        .from_(sg.to_identifier(left, quoted=True))
+        .intersect(sg.select(STAR).from_(sg.to_identifier(right, quoted=True)))
     )
+
     result = ctx.execute(sql.sql(Polars), eager=False)
+
     if op.distinct is True:
         return result.unique()
     return result
 
 
 @translate.register(ops.Difference)
 def execute_difference(op, *, ctx, **kw):
+    left = gen_name("polars_diff_left")
+    right = gen_name("polars_diff_right")
+
     ctx.register_many(
         frames={
-            "left": translate(op.left, ctx=ctx, **kw),
-            "right": translate(op.right, ctx=ctx, **kw),
+            left: translate(op.left, ctx=ctx, **kw),
+            right: translate(op.right, ctx=ctx, **kw),
         }
     )
+
     sql = (
         sg.select(STAR)
-        .from_(sg.to_identifier("left", quoted=True))
-        .except_(sg.select(STAR).from_(sg.to_identifier("right", quoted=True)))
+        .from_(sg.to_identifier(left, quoted=True))
+        .except_(sg.select(STAR).from_(sg.to_identifier(right, quoted=True)))
     )
+
     result = ctx.execute(sql.sql(Polars), eager=False)
+
     if op.distinct is True:
         return result.unique()
     return result