[DOP-26967] Add index for dataset_tags.tag_value_id

Author: dolfinus

data_rentgen/db/migrations/versions/2025-09-18_102502e85b2d_add_index_for_dataset_tags_tag_value_id.py

@@ -0,0 +1,25 @@
+# SPDX-FileCopyrightText: 2024-2025 MTS PJSC
+# SPDX-License-Identifier: Apache-2.0
+"""Add index for dataset_tags.tag_value_id
+
+Revision ID: 102502e85b2d
+Revises: 5f52db7affd9
+Create Date: 2025-09-18 11:34:07.261497
+
+"""
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "102502e85b2d"
+down_revision = "5f52db7affd9"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_index("ix__dataset_tags__tag_value_id", "dataset_tags", ["tag_value_id"], unique=False)
+
+
+def downgrade() -> None:
+    op.drop_index("ix__dataset_tags__tag_value_id", table_name="dataset_tags")

data_rentgen/db/models/dataset.py

@@ -67,4 +67,5 @@ class Dataset(Base):
     Base.metadata,
     Column("dataset_id", ForeignKey("dataset.id", ondelete="CASCADE"), primary_key=True),
     Column("tag_value_id", ForeignKey("tag_value.id", ondelete="CASCADE"), primary_key=True),
+    Index("ix__dataset_tags__tag_value_id", "tag_value_id"),
 )