*Fix issues with != (#42)

Author: ag-ramachandran

sqlalchemy_kusto/dialect_kql.py

@@ -521,6 +521,13 @@ def _sql_to_kql_where(where_clause: str) -> str:
             where_clause,
             flags=re.IGNORECASE,
         )
+
+        where_clause = re.sub(
+            r"!=\s*=",
+            "!=",
+            where_clause,
+            flags=re.IGNORECASE,
+        )
         # Handle logical operators 'AND' and 'OR' to ensure the conditions are preserved
         # Replace AND with 'and' in KQL
         where_clause = re.sub(r"\s+AND\s+", r" and ", where_clause, flags=re.IGNORECASE)

tests/unit/test_dialect_kql.py

@@ -113,6 +113,7 @@ def test_select_from_text():
         pytest.param(text('Field1 ILIKE "%123"'), 'Field1 endswith "123"'),
         pytest.param(text("Field1 NOT ILIKE '%123'"), """Field1 !endswith '123'"""),
         pytest.param(text('Field1 NOT ILIKE "%123"'), 'Field1 !endswith "123"'),
+        pytest.param(text("Field1 != '1'"), """Field1 != '1'"""),
         pytest.param(
             Column("Field2", Integer).ilike("abc%"),
             """tolower(["Field2"]) startswith_cs tolower('abc')""",