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remove code that leaves behind old bigint tables on fresh installs

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we don't need this code at all anymore - the bigint migration is long
gone, and anybody upgrading to this version of AWX has already
migrated their data
This commit is contained in:
Ryan Petrello 2021-03-19 01:16:31 -04:00 committed by Jim Ladd
parent 200901e53b
commit fbb74a9896
1 changed files with 1 additions and 33 deletions
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34
awx/main/migrations/0113_v370_event_bigint.py
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@ -10,15 +10,6 @@ def migrate_event_data(apps, schema_editor):
# that have a bigint primary key (because the old usage of an integer
# numeric isn't enough, as its range is about 2.1B, see:
# https://www.postgresql.org/docs/9.1/datatype-numeric.html)
# unfortunately, we can't do this with a simple ALTER TABLE, because
# for tables with hundreds of millions or billions of rows, the ALTER TABLE
# can take *hours* on modest hardware.
#
# the approach in this migration means that post-migration, event data will
# *not* immediately show up, but will be repopulated over time progressively
# the trade-off here is not having to wait hours for the full data migration
# before you can start and run AWX again (including new playbook runs)
for tblname in ('main_jobevent', 'main_inventoryupdateevent', 'main_projectupdateevent', 'main_adhoccommandevent', 'main_systemjobevent'):
with connection.cursor() as cursor:
# rename the current event table
@ -35,30 +26,7 @@ def migrate_event_data(apps, schema_editor):
cursor.execute(f'CREATE SEQUENCE "{tblname}_id_seq";')
cursor.execute(f'ALTER TABLE "{tblname}" ALTER COLUMN "id" ' f"SET DEFAULT nextval('{tblname}_id_seq');")
cursor.execute(f"SELECT setval('{tblname}_id_seq', (SELECT MAX(id) FROM _old_{tblname}), true);")
# replace the BTREE index on main_jobevent.job_id with
# a BRIN index to drastically improve per-UJ lookup performance
# see: https://info.crunchydata.com/blog/postgresql-brin-indexes-big-data-performance-with-minimal-storage
if tblname == 'main_jobevent':
cursor.execute("SELECT indexname FROM pg_indexes WHERE tablename='main_jobevent' AND indexdef LIKE '%USING btree (job_id)';")
old_index = cursor.fetchone()[0]
cursor.execute(f'DROP INDEX {old_index}')
cursor.execute('CREATE INDEX main_jobevent_job_id_brin_idx ON main_jobevent USING brin (job_id);')
# remove all of the indexes and constraints from the old table
# (they just slow down the data migration)
cursor.execute(f"SELECT indexname, indexdef FROM pg_indexes WHERE tablename='_old_{tblname}' AND indexname != '{tblname}_pkey';")
indexes = cursor.fetchall()
cursor.execute(
f"SELECT conname, contype, pg_catalog.pg_get_constraintdef(r.oid, true) as condef FROM pg_catalog.pg_constraint r WHERE r.conrelid = '_old_{tblname}'::regclass AND conname != '{tblname}_pkey';"
)
constraints = cursor.fetchall()
for indexname, indexdef in indexes:
cursor.execute(f'DROP INDEX IF EXISTS {indexname}')
for conname, contype, condef in constraints:
cursor.execute(f'ALTER TABLE _old_{tblname} DROP CONSTRAINT IF EXISTS {conname}')
cursor.execute(f'DROP TABLE _old_{tblname};')
class FakeAlterField(migrations.AlterField):