simple remarks transforms

Signed-off-by: varun-edachali-dbx <varun.edachali@databricks.com>

Author: varun-edachali-dbx

src/databricks/sql/backend/sea/utils/metadata_mappings.py

@@ -26,7 +26,7 @@ class MetadataColumnMappings:
     SCHEMA_COLUMN = ResultColumn("TABLE_SCHEM", "namespace", SqlType.STRING)
     TABLE_NAME_COLUMN = ResultColumn("TABLE_NAME", "tableName", SqlType.STRING)
     TABLE_TYPE_COLUMN = ResultColumn("TABLE_TYPE", "tableType", SqlType.STRING)
-    REMARKS_COLUMN = ResultColumn("REMARKS", "remarks", SqlType.STRING)
+    REMARKS_COLUMN = ResultColumn("REMARKS", "remarks", SqlType.STRING, transform_remarks)
     TYPE_CATALOG_COLUMN = ResultColumn("TYPE_CAT", None, SqlType.STRING)
     TYPE_SCHEM_COLUMN = ResultColumn("TYPE_SCHEM", None, SqlType.STRING)
     TYPE_NAME_COLUMN = ResultColumn("TYPE_NAME", None, SqlType.STRING)
@@ -54,7 +54,7 @@ class MetadataColumnMappings:
         transform_ordinal_position,
     )
 
-    NULLABLE_COLUMN = ResultColumn("NULLABLE", None, SqlType.INT, transform_nullable)
+    NULLABLE_COLUMN = ResultColumn("NULLABLE", "isNullable", SqlType.INT, transform_nullable)
     COLUMN_DEF_COLUMN = ResultColumn("COLUMN_DEF", None, SqlType.STRING)
     SQL_DATA_TYPE_COLUMN = ResultColumn("SQL_DATA_TYPE", None, SqlType.INT)
     SQL_DATETIME_SUB_COLUMN = ResultColumn("SQL_DATETIME_SUB", None, SqlType.INT)

src/databricks/sql/backend/sea/utils/metadata_transforms.py

@@ -3,7 +3,7 @@
 
 def transform_is_autoincrement(value):
     """Transform IS_AUTOINCREMENT: boolean to YES/NO string."""
-    if isinstance(value, bool):
+    if isinstance(value, bool) or value is None:
         return "YES" if value else "NO"
     return value
 
@@ -16,6 +16,10 @@ def transform_is_nullable(value):
         return "NO"
     return value
 
+def transform_remarks(value):
+    if value is None: 
+        return "" 
+    return value 
 
 def transform_nullable(value):
     """Transform NULLABLE column: boolean/string to integer."""