Mapped column (#22644)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

api/core/rag/datasource/vdb/pgvecto_rs/pgvecto_rs.py

@@ -6,7 +6,7 @@ from uuid import UUID, uuid4
 from numpy import ndarray
 from pgvecto_rs.sqlalchemy import VECTOR  # type: ignore
 from pydantic import BaseModel, model_validator
-from sqlalchemy import Float, String, create_engine, insert, select, text
+from sqlalchemy import Float, create_engine, insert, select, text
 from sqlalchemy import text as sql_text
 from sqlalchemy.dialects import postgresql
 from sqlalchemy.orm import Mapped, Session, mapped_column
@@ -67,7 +67,7 @@ class PGVectoRS(BaseVector):
                 postgresql.UUID(as_uuid=True),
                 primary_key=True,
             )
-            text: Mapped[str] = mapped_column(String)
+            text: Mapped[str]
             meta: Mapped[dict] = mapped_column(postgresql.JSONB)
             vector: Mapped[ndarray] = mapped_column(VECTOR(dim))