0033_symbol_intel_blast_index.py
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| 1 | """Add (repo_id, blast DESC) index on musehub_symbol_intel for blast-leader card query. |
| 2 | |
| 3 | The DISTINCT ON (repo_id) ORDER BY repo_id, blast DESC query used by |
| 4 | enrich_repo_cards() needs this index to avoid a sequential scan when |
| 5 | fetching the top blast symbol per repo across a batch of repo IDs. |
| 6 | |
| 7 | Revision ID: 0033 |
| 8 | Revises: 0032 |
| 9 | """ |
| 10 | from __future__ import annotations |
| 11 | |
| 12 | from alembic import op |
| 13 | import sqlalchemy as sa |
| 14 | |
| 15 | revision = "0033" |
| 16 | down_revision = "0032" |
| 17 | branch_labels = None |
| 18 | depends_on = None |
| 19 | |
| 20 | |
| 21 | def upgrade() -> None: |
| 22 | op.create_index( |
| 23 | "ix_symbol_intel_repo_blast", |
| 24 | "musehub_symbol_intel", |
| 25 | ["repo_id", sa.text("blast DESC NULLS LAST")], |
| 26 | if_not_exists=True, |
| 27 | ) |
| 28 | |
| 29 | |
| 30 | def downgrade() -> None: |
| 31 | op.drop_index("ix_symbol_intel_repo_blast", table_name="musehub_symbol_intel") |