Omega359 commented on code in PR #13356:
URL: https://github.com/apache/datafusion/pull/13356#discussion_r1839183307
##########
datafusion/sqllogictest/test_files/nullif.slt:
##########
@@ -97,11 +97,35 @@ SELECT NULLIF(1, 3);
----
1
-query I
+query T
SELECT NULLIF(NULL, NULL);
----
NULL
+query R
+select nullif(1, 1.2);
+----
+1
+
+query R
+select nullif(1.0, 2);
+----
+1
+
+query error DataFusion error: Error during planning: Internal error: Failed to
match any signature, errors: Error during planning: The signature expected
NativeType::String but received NativeType::Int64
+select nullif(2, 'a');
+
+
+query T
+select nullif('2', '3');
+----
+2
+
+# TODO: support numeric string
+# This query success in Postgres and DuckDB
+query error DataFusion error: Error during planning: Internal error: Failed to
match any signature, errors: Error during planning: The signature expected
NativeType::String but received NativeType::Int64
+select nullif(2, '1');
Review Comment:
This also used to work.
```
query T
select nullif(2, '1');
----
2
```
Interesting that the type is text vs number but still, it did work.
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