55 lines
1.4 KiB
Python
55 lines
1.4 KiB
Python
import frappe
|
|
|
|
# This patch deletes all the duplicate indexes created for same column
|
|
# The patch only checks for indexes with UNIQUE constraints
|
|
|
|
|
|
def execute():
|
|
if frappe.db.db_type != "mariadb":
|
|
return
|
|
|
|
all_tables = frappe.db.get_tables()
|
|
final_deletion_map = frappe._dict()
|
|
|
|
for table in all_tables:
|
|
indexes_to_keep_map = frappe._dict()
|
|
indexes_to_delete = []
|
|
index_info = frappe.db.sql(
|
|
f"""SHOW INDEX FROM `{table}`
|
|
WHERE Seq_in_index = 1
|
|
AND Non_unique=0""",
|
|
as_dict=1,
|
|
)
|
|
|
|
for index in index_info:
|
|
if not indexes_to_keep_map.get(index.Column_name):
|
|
indexes_to_keep_map[index.Column_name] = index
|
|
else:
|
|
indexes_to_delete.append(index.Key_name)
|
|
|
|
if indexes_to_delete:
|
|
final_deletion_map[table] = indexes_to_delete
|
|
|
|
for table_name, index_list in final_deletion_map.items():
|
|
for index in index_list:
|
|
try:
|
|
if is_clustered_index(table_name, index):
|
|
continue
|
|
frappe.db.sql_ddl(f"ALTER TABLE `{table_name}` DROP INDEX `{index}`")
|
|
except Exception as e:
|
|
frappe.log_error("Failed to drop index")
|
|
print(f"x Failed to drop index {index} from {table_name}\n {e!s}")
|
|
else:
|
|
print(f"✓ dropped {index} index from {table}")
|
|
|
|
|
|
def is_clustered_index(table, index_name):
|
|
return bool(
|
|
frappe.db.sql(
|
|
f"""SHOW INDEX FROM `{table}`
|
|
WHERE Key_name = "{index_name}"
|
|
AND Seq_in_index = 2
|
|
""",
|
|
as_dict=True,
|
|
)
|
|
)
|