test: add advanced dictionary test

datafusion/sqllogictest/test_files/dictionary.slt

@@ -632,4 +632,61 @@ south 2
 statement ok
 DROP TABLE dict_count_distinct;
 
+# overlapping values with different key assignments across batches
+query TI rowsort
+WITH
+  first_batch AS (
+    SELECT arrow_cast(column1, 'Dictionary(Int32, Utf8)') AS region
+    FROM (VALUES ('west'), ('east'), ('west'), (NULL)) AS t(column1)
+  ),
+  second_batch AS (
+    SELECT arrow_cast(column1, 'Dictionary(Int16, LargeUtf8)') AS region
+    FROM (VALUES ('east'), ('west'), ('north'), (NULL)) AS t(column1)
+  )
+SELECT region, count(*)
+FROM (SELECT region FROM first_batch UNION ALL SELECT region FROM second_batch)
+GROUP BY region;
+----
+NULL 2
+east 2
+north 1
+west 3
+
+# different logical values must not merge even when their dictionary key numbers coincide
+query TI rowsort
+WITH
+  first_batch AS (
+    SELECT arrow_cast(column1, 'Dictionary(Int8, LargeUtf8)') AS status
+    FROM (VALUES ('active'), ('inactive'), (NULL)) AS t(column1)
+  ),
+  second_batch AS (
+    SELECT arrow_cast(column1, 'Dictionary(Int16, Utf8)') AS status
+    FROM (VALUES ('inactive'), ('active'), (NULL)) AS t(column1)
+  )
+SELECT status, count(*)
+FROM (SELECT status FROM first_batch UNION ALL SELECT status FROM second_batch)
+GROUP BY status;
+----
+NULL 2
+active 2
+inactive 2
 
+# value present in one batch's dictionary but absent from the other
+query TI rowsort
+WITH
+  first_batch AS (
+    SELECT arrow_cast(column1, 'Dictionary(Int32, Utf8)') AS sensor
+    FROM (VALUES ('temperature'), ('humidity'), ('temperature'), (NULL)) AS t(column1)
+  ),
+  second_batch AS (
+    SELECT arrow_cast(column1, 'Dictionary(Int8, LargeUtf8)') AS sensor
+    FROM (VALUES ('temperature'), ('pressure'), (NULL)) AS t(column1)
+  )
+SELECT sensor, count(*)
+FROM (SELECT sensor FROM first_batch UNION ALL SELECT sensor FROM second_batch)
+GROUP BY sensor;
+----
+NULL 2
+humidity 1
+pressure 1
+temperature 3