initial import: adding fixes

Author: davidsbatista

integrations/arcadedb/src/haystack_integrations/document_stores/arcadedb/filters.py

@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 """Convert Haystack filter dictionaries to ArcadeDB SQL WHERE clauses."""
-
+import re
 from typing import Any
 
 
@@ -64,6 +64,12 @@ def _parse_condition(condition: dict[str, Any]) -> str:
 
 
 def _comparison_to_sql(field: str, operator: str, value: Any) -> str:
+
+    if not re.match(r'^[a-zA-Z_][a-zA-Z0-9_.\[\]"]*$', field):
+        msg = (f"Invalid field name: {field}. Field names must start with a letter or underscore and can contain "
+               f"letters, digits, underscores, dots, brackets, and quotes.")
+        raise ValueError(msg)
+
     if operator == "==":
         if value is None:
             return f"{field} IS NULL"
@@ -106,7 +112,7 @@ def _comparison_to_sql(field: str, operator: str, value: Any) -> str:
 def _sql_value(value: Any) -> str:
     """Format a Python value as an ArcadeDB SQL literal."""
     if isinstance(value, str):
-        escaped = value.replace("'", "\\'")
+        escaped = value.replace("\\", "\\\\").replace("'", "\\'")
         return f"'{escaped}'"
     if isinstance(value, bool):
         return "true" if value else "false"