mirror of
https://github.com/rennf93/roboco.git
synced 2026-08-03 07:23:24 +02:00
30 lines
899 B
Python
30 lines
899 B
Python
|
"""Add ix_tasks_parent_task_id — sibling scans on the claim hot path.
|
||
|
|
|
||
|
|
Postgres does not auto-index FK columns, so every sibling lookup
|
||
|
|
(``get_subtasks``, the sequence claim guard's blocking-sibling probe, the
|
||
|
|
dispatch merge/lane barriers) was a Seq Scan over tasks. The sequence guard
|
||
|
|
runs on every PENDING/NEEDS_REVISION claim, so the scan sat on the hottest
|
||
|
|
verb. Plain btree; additive; no data change.
|
||
|
|
|
||
|
|
Revision ID: 069_tasks_parent_task_id_idx
|
||
|
|
Revises: 068_tasks_constraints_column
|
||
|
|
Create Date: 2026-07-10
|
||
|
|
"""
|
||
|
|
|
||
|
|
from __future__ import annotations
|
||
|
|
|
||
|
|
from alembic import op
|
||
|
|
|
||
|
|
revision = "069_tasks_parent_task_id_idx"
|
||
|
|
down_revision = "068_tasks_constraints_column"
|
||
|
|
branch_labels = None
|
||
|
|
depends_on = None
|
||
|
|
|
||
|
|
|
||
|
|
def upgrade() -> None:
|
||
|
|
op.create_index("ix_tasks_parent_task_id", "tasks", ["parent_task_id"])
|
||
|
|
|
||
|
|
|
||
|
|
def downgrade() -> None:
|
||
|
|
op.drop_index("ix_tasks_parent_task_id", table_name="tasks")
|