BigQueryVectorStore assumes we are now creating the vector store

[Shai-Di]

If we already have an existing VectorStore in BigQuery and we just want to connect to it and fetch documents from it, the _create_search_query method crashes when using filters, since self.table_schema is not initialized, due to these lines:

if filter:
            filter_expressions = []
            for column, value in filter.items():
                if self.table_schema[column] in ["INTEGER", "FLOAT"]:  # type: ignore[index]
                    filter_expressions.append(f"base.{column} = {value}")
                else:
                    filter_expressions.append(f"base.{column} = '{value}'")
            where_filter_expr = " AND ".join(filter_expressions)
        else:
            where_filter_expr = "TRUE"

Fixed it locally by changing it to:

if filter:
            if not self.table_schema:
                self._validate_bq_table()
            filter_expressions = []
            for column, value in filter.items():
                if self.table_schema[column] in ["INTEGER", "FLOAT"]:  # type: ignore[index]
                    filter_expressions.append(f"base.{column} = {value}")
                else:
                    filter_expressions.append(f"base.{column} = '{value}'")
            where_filter_expr = " AND ".join(filter_expressions)
        else:
            where_filter_expr = "TRUE"

[lkuligin]

@eliasecchig

[eliasecchig]

thanks for flagging this @Shai-Di, will prepare a PR tomorrow to fix this!