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backend/alembic/versions/20260815_01_add_adj_factor.py

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+"""add adj_factor table (复权因子底座)
+
+Revision ID: 20260815_01
+Revises: 208b0c5d302a
+Create Date: 2026-08-15
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision: str = "20260815_01"
+down_revision: Union[str, Sequence[str], None] = "208b0c5d302a"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "adj_factor",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("trade_date", sa.DateTime(), nullable=False),
+        sa.Column("ts_code", sa.String(length=12), nullable=False),
+        sa.Column("adj_factor", sa.Float(), nullable=False),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint("ts_code", "trade_date", name="uq_adj_code_date"),
+    )
+    op.create_index("ix_adj_factor_trade_date", "adj_factor", ["trade_date"])
+    op.create_index("ix_adj_factor_ts_code", "adj_factor", ["ts_code"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_adj_factor_ts_code", table_name="adj_factor")
+    op.drop_index("ix_adj_factor_trade_date", table_name="adj_factor")
+    op.drop_table("adj_factor")