"""SEARCH-002: GIN-Trigram-Index auf Material.name für Suche über Materialnamen.

Revision ID: 0025_material_suchindex
Revises: 0024_dokument_hash
Create Date: 2026-09-08
"""
from typing import Sequence, Union

from alembic import op

revision: str = "0025_material_suchindex"
down_revision: Union[str, None] = "0024_dokument_hash"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # pg_trgm-Extension existiert bereits seit Migration 0023.
    op.execute("CREATE INDEX ix_material_name_trgm ON material USING GIN (name gin_trgm_ops)")


def downgrade() -> None:
    op.execute("DROP INDEX IF EXISTS ix_material_name_trgm")