Support TEXT_MATCH FilterOperator in Postgres Vector Store (#16304)

llama-index-integrations/vector_stores/llama-index-vector-stores-postgres/llama_index/vector_stores/postgres/base.py

@@ -462,6 +462,8 @@ def _to_postgres_operator(self, operator: FilterOperator) -> str:
             return "NOT IN"
         elif operator == FilterOperator.CONTAINS:
             return "@>"
+        elif operator == FilterOperator.TEXT_MATCH:
+            return "LIKE"
         else:
             _logger.warning(f"Unknown operator: {operator}, fallback to '='")
             return "="
@@ -488,6 +490,13 @@ def _build_filter_clause(self, filter_: MetadataFilter) -> Any:
                 f"{self._to_postgres_operator(filter_.operator)} "
                 f"'[\"{filter_.value}\"]'"
             )
+        elif filter_.operator == FilterOperator.TEXT_MATCH:
+            # Where the operator is text_match, we need to wrap the filter in '%' characters
+            return text(
+                f"metadata_->>'{filter_.key}' "
+                f"{self._to_postgres_operator(filter_.operator)} "
+                f"'%{filter_.value}%'"
+            )
         else:
             # Check if value is a number. If so, cast the metadata value to a float
             # This is necessary because the metadata is stored as a string

llama-index-integrations/vector_stores/llama-index-vector-stores-postgres/pyproject.toml

@@ -27,7 +27,7 @@ exclude = ["**/BUILD"]
 license = "MIT"
 name = "llama-index-vector-stores-postgres"
 readme = "README.md"
-version = "0.2.5"
+version = "0.2.6"
 
 [tool.poetry.dependencies]
 python = ">=3.8.1,<4.0"