be6c18b3b4
- random: md5(seed) -> uuid startu, okno 2000 id (8000 dla wertykalow) po pk_scenes, filtry na oknie; bez okna planer robil Merge Anti Join po 2,3 mln wierszy (7,6 s) - duration_desc/asc: bez NULL, do 10 h, indeks ix_scenes_duration (migracja 0035) Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
35 lines
1.2 KiB
Python
35 lines
1.2 KiB
Python
"""Indeks pod sortowanie scen po dlugosci (najdluzsze / najkrotsze).
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Jeden indeks (duration_sec, created_at, id) WHERE duration_sec IS NOT NULL obsluguje
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oba kierunki: skan w przod daje najkrotsze, w tyl najdluzsze. Sceny bez dlugosci sa
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odfiltrowane w zapytaniu, wiec kolejnosc NULL-i nie gra roli i wystarczy jeden indeks.
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CONCURRENTLY w autocommit_block, jak w 0027: zwykly CREATE INDEX blokowalby zapisy
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ingestu na czas budowy (4,1 mln wierszy). Nieudany CONCURRENTLY zostawia indeks
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INVALID; wtedy DROP INDEX i ponownie.
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Revision ID: 0035_scenes_duration_idx
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Revises: 0034_favorite_sites
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Create Date: 2026-09-14
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"""
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from __future__ import annotations
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from alembic import op
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revision = "0035_scenes_duration_idx"
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down_revision: str | None = "0034_favorite_sites"
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branch_labels = None
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depends_on = None
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def upgrade() -> None:
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with op.get_context().autocommit_block():
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op.execute(
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"CREATE INDEX CONCURRENTLY IF NOT EXISTS ix_scenes_duration "
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"ON scenes (duration_sec, created_at, id) WHERE duration_sec IS NOT NULL"
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)
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def downgrade() -> None:
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with op.get_context().autocommit_block():
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op.execute("DROP INDEX CONCURRENTLY IF EXISTS ix_scenes_duration")
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