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Merge pull request #6273 from freqtrade/pg_migrations

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Update database migrations for PG and mariadb
This commit is contained in:
Matthias
2022-02-06 14:39:02 +01:00
committed by GitHub
parent b657d2d8de 8f2425e49f
commit 303b12efd8
2 changed files with 99 additions and 87 deletions
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86
freqtrade/persistence/migrations.py
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@@ -28,7 +28,36 @@ def get_backup_name(tabs, backup_prefix: str):
return table_back_name
def migrate_trades_table(decl_base, inspector, engine, table_back_name: str, cols: List):
def get_last_sequence_ids(engine, trade_back_name, order_back_name):
order_id: int = None
trade_id: int = None
if engine.name == 'postgresql':
with engine.begin() as connection:
trade_id = connection.execute(text("select nextval('trades_id_seq')")).fetchone()[0]
order_id = connection.execute(text("select nextval('orders_id_seq')")).fetchone()[0]
with engine.begin() as connection:
connection.execute(text(
f"ALTER SEQUENCE orders_id_seq rename to {order_back_name}_id_seq_bak"))
connection.execute(text(
f"ALTER SEQUENCE trades_id_seq rename to {trade_back_name}_id_seq_bak"))
return order_id, trade_id
def set_sequence_ids(engine, order_id, trade_id):
if engine.name == 'postgresql':
with engine.begin() as connection:
if order_id:
connection.execute(text(f"ALTER SEQUENCE orders_id_seq RESTART WITH {order_id}"))
if trade_id:
connection.execute(text(f"ALTER SEQUENCE trades_id_seq RESTART WITH {trade_id}"))
def migrate_trades_and_orders_table(
decl_base, inspector, engine,
trade_back_name: str, cols: List,
order_back_name: str):
fee_open = get_column_def(cols, 'fee_open', 'fee')
fee_open_cost = get_column_def(cols, 'fee_open_cost', 'null')
fee_open_currency = get_column_def(cols, 'fee_open_currency', 'null')
@@ -64,11 +93,20 @@ def migrate_trades_table(decl_base, inspector, engine, table_back_name: str, col
# Schema migration necessary
with engine.begin() as connection:
connection.execute(text(f"alter table trades rename to {table_back_name}"))
connection.execute(text(f"alter table trades rename to {trade_back_name}"))
with engine.begin() as connection:
# drop indexes on backup table in new session
for index in inspector.get_indexes(table_back_name):
connection.execute(text(f"drop index {index['name']}"))
for index in inspector.get_indexes(trade_back_name):
if engine.name == 'mysql':
connection.execute(text(f"drop index {index['name']} on {trade_back_name}"))
else:
connection.execute(text(f"drop index {index['name']}"))
order_id, trade_id = get_last_sequence_ids(engine, trade_back_name, order_back_name)
drop_orders_table(engine, order_back_name)
# let SQLAlchemy create the schema as required
decl_base.metadata.create_all(engine)
@@ -100,9 +138,12 @@ def migrate_trades_table(decl_base, inspector, engine, table_back_name: str, col
{sell_order_status} sell_order_status,
{strategy} strategy, {buy_tag} buy_tag, {timeframe} timeframe,
{open_trade_value} open_trade_value, {close_profit_abs} close_profit_abs
from {table_back_name}
from {trade_back_name}
"""))
migrate_orders_table(engine, order_back_name, cols)
set_sequence_ids(engine, order_id, trade_id)
def migrate_open_orders_to_trades(engine):
with engine.begin() as connection:
@@ -121,19 +162,18 @@ def migrate_open_orders_to_trades(engine):
"""))
def migrate_orders_table(decl_base, inspector, engine, table_back_name: str, cols: List):
# Schema migration necessary
def drop_orders_table(engine, table_back_name: str):
# Drop and recreate orders table as backup
# This drops foreign keys, too.
with engine.begin() as connection:
connection.execute(text(f"alter table orders rename to {table_back_name}"))
connection.execute(text(f"create table {table_back_name} as select * from orders"))
connection.execute(text("drop table orders"))
with engine.begin() as connection:
# drop indexes on backup table in new session
for index in inspector.get_indexes(table_back_name):
connection.execute(text(f"drop index {index['name']}"))
def migrate_orders_table(engine, table_back_name: str, cols: List):
# let SQLAlchemy create the schema as required
decl_base.metadata.create_all(engine)
with engine.begin() as connection:
connection.execute(text(f"""
insert into orders ( id, ft_trade_id, ft_order_side, ft_pair, ft_is_open, order_id,
@@ -155,11 +195,16 @@ def check_migrate(engine, decl_base, previous_tables) -> None:
cols = inspector.get_columns('trades')
tabs = get_table_names_for_table(inspector, 'trades')
table_back_name = get_backup_name(tabs, 'trades_bak')
order_tabs = get_table_names_for_table(inspector, 'orders')
order_table_bak_name = get_backup_name(order_tabs, 'orders_bak')
# Check for latest column
# Check if migration necessary
# Migrates both trades and orders table!
if not has_column(cols, 'buy_tag'):
logger.info(f'Running database migration for trades - backup: {table_back_name}')
migrate_trades_table(decl_base, inspector, engine, table_back_name, cols)
logger.info(f"Running database migration for trades - "
f"backup: {table_back_name}, {order_table_bak_name}")
migrate_trades_and_orders_table(
decl_base, inspector, engine, table_back_name, cols, order_table_bak_name)
# Reread columns - the above recreated the table!
inspector = inspect(engine)
cols = inspector.get_columns('trades')
@@ -167,12 +212,3 @@ def check_migrate(engine, decl_base, previous_tables) -> None:
if 'orders' not in previous_tables and 'trades' in previous_tables:
logger.info('Moving open orders to Orders table.')
migrate_open_orders_to_trades(engine)
else:
cols_order = inspector.get_columns('orders')
if not has_column(cols_order, 'average'):
tabs = get_table_names_for_table(inspector, 'orders')
# Empty for now - as there is only one iteration of the orders table so far.
table_back_name = get_backup_name(tabs, 'orders_bak')
migrate_orders_table(decl_base, inspector, engine, table_back_name, cols)