Make docs indexed cnt more accurate (#579)

backend/alembic/versions/7f99be1cb9f5_add_index_for_getting_documents_just_by_.py

@@ -0,0 +1,35 @@
+"""Add index for getting documents just by connector id / credential id
+
+Revision ID: 7f99be1cb9f5
+Revises: 78dbe7e38469
+Create Date: 2023-10-15 22:48:15.487762
+
+"""
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision = "7f99be1cb9f5"
+down_revision = "78dbe7e38469"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_index(
+        op.f(
+            "ix_document_by_connector_credential_pair_pkey__connector_id__credential_id"
+        ),
+        "document_by_connector_credential_pair",
+        ["connector_id", "credential_id"],
+        unique=False,
+    )
+
+
+def downgrade() -> None:
+    op.drop_index(
+        op.f(
+            "ix_document_by_connector_credential_pair_pkey__connector_id__credential_id"
+        ),
+        table_name="document_by_connector_credential_pair",
+    )