Young-Leo opened a new pull request, #17053:
URL: https://github.com/apache/iotdb/pull/17053
This fixes a table-model issue where NULL-related predicates fail only
when the table has no TAG columns, while the same predicates work when
TAG columns exist.
## Repro (table model)
### Table without TAG (used to fail)
```sql
CREATE TABLE test_table_no_tag(
id INT32 FIELD,
name STRING FIELD,
value DOUBLE FIELD
);
SELECT * FROM test_table_no_tag WHERE name = null;
```
### Table with TAG (used to work)
```sql
CREATE TABLE test_table_with_tag(
id STRING TAG,
name STRING FIELD,
value DOUBLE FIELD
);
SELECT * FROM test_table_with_tag WHERE name = null;
```
## Fix
Handle casted NULL predicates across predicate visitors so the no-TAG
path no longer fails.
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