Fixed df reassignment warning on dataframe view.

Signed-off-by: Varun Mittal <[email protected]>

focus_validator/rules/checks.py

@@ -59,11 +59,8 @@ def check_sql_query(df_groups, sql_query, column_alias):
 
         # for the given indexes in false_indexes list, we are extracting the rows from the dataframe and
         # add column_alias value to failure_case column and index to index column
-        failure_cases = df[df.index.isin(false_indexes)]
-        failure_cases["failure_case"] = df.apply(
-            lambda row: {column: row[column] for column in column_alias}, axis=1
-        )
-        failure_cases["failure_case"] = df.apply(
+        failure_cases = df[df.index.isin(false_indexes)].copy()
+        failure_cases["failure_case"] = failure_cases.apply(
             lambda row: ",".join(
                 [f"{column}:{row[column]}" for column in column_alias]
             ),