39 lines
1.3 KiB
Python
39 lines
1.3 KiB
Python
# Индексы для масштабированной БД (20k+ записей)
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from typing import Sequence, Union
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from alembic import op
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revision: str = "003_add_composite_indexes"
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down_revision: Union[str, None] = "002_add_indexes"
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branch_labels: Union[str, Sequence[str], None] = None
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depends_on: Union[str, Sequence[str], None] = None
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def upgrade() -> None:
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# Partial index для активных машин DUBIZZLE (is_sold = FALSE)
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# Ускоряет поиск при mark_sold операциях
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op.execute(
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"CREATE INDEX IF NOT EXISTS ix_cars_active_dubizzle "
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"ON cars (origin_url) "
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"WHERE is_sold = FALSE AND origin_id LIKE 'dubizzle:%'"
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)
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# Composite index для проверки дубликатов изображений
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op.create_index(
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"ix_images_car_id_fullres",
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"images",
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["car_id", "fullres_image"],
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)
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# Index для быстрого поиска existing машин по origin_url
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op.execute(
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"CREATE INDEX IF NOT EXISTS ix_cars_origin_url_id "
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"ON cars (origin_url, origin_id)"
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)
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def downgrade() -> None:
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op.execute("DROP INDEX IF EXISTS ix_cars_origin_url_id")
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op.drop_index("ix_images_car_id_fullres", table_name="images")
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op.execute("DROP INDEX IF EXISTS ix_cars_active_dubizzle")
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