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Explicitly declare length of large MySQL indices.

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Most MySQL installs silently truncate indices at a specific number of bytes.
This value is 767 bytes unless either the innodb_large_prefix option is turned
on or the innodb_page_size has been changed. This change explicitly limits the
size of large indices to 767 characters due to the latin1 charset being 1 byte
per char.
This commit is contained in:
Jimmy Zelinskie 2015-01-06 14:55:31 -05:00
parent 88a60d05b6
commit baa4918d89
2 changed files with 24 additions and 2 deletions
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22
data/migrations/versions/228d1af6af1c_mysql_max_index_lengths.py Normal file
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@ -0,0 +1,22 @@
"""mysql max index lengths
Revision ID: 228d1af6af1c
Revises: 5b84373e5db
Create Date: 2015-01-06 14:35:24.651424
"""
# revision identifiers, used by Alembic.
revision = '228d1af6af1c'
down_revision = '5b84373e5db'
from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import mysql
def upgrade(tables):
op.drop_index('queueitem_queue_name', table_name='queueitem')
op.create_index('queueitem_queue_name', 'queueitem', ['queue_name'], unique=False, mysql_length=767)
def downgrade(tables):
pass

4
data/migrations/versions/5a07499ce53f_set_up_initial_database.py
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@ -53,7 +53,7 @@ def upgrade(tables):
op.create_index('queueitem_available', 'queueitem', ['available'], unique=False)
op.create_index('queueitem_available_after', 'queueitem', ['available_after'], unique=False)
op.create_index('queueitem_processing_expires', 'queueitem', ['processing_expires'], unique=False)
op.create_index('queueitem_queue_name', 'queueitem', ['queue_name'], unique=False)
op.create_index('queueitem_queue_name', 'queueitem', ['queue_name'], unique=False, mysql_length=767)
op.create_table('role',
sa.Column('id', sa.Integer(), nullable=False),
sa.Column('name', sa.String(length=255), nullable=False),
@ -376,7 +376,7 @@ def upgrade(tables):
sa.ForeignKeyConstraint(['storage_id'], ['imagestorage.id'], ),
sa.PrimaryKeyConstraint('id')
)
op.create_index('image_ancestors', 'image', ['ancestors'], unique=False)
op.create_index('image_ancestors', 'image', ['ancestors'], unique=False, mysql_length=767)
op.create_index('image_repository_id', 'image', ['repository_id'], unique=False)
op.create_index('image_repository_id_docker_image_id', 'image', ['repository_id', 'docker_image_id'], unique=True)
op.create_index('image_storage_id', 'image', ['storage_id'], unique=False)