this would be a bug since we do have a list of entries that are
dependent on each other, so orderings like these need to be coded.
https://bitbucket.org/zzzeek/sqlalchemy/issues/3961/mysql-partition-options-need-to-be-after
is added which per the syntax diagram moves all the partition options to
the end, however this is targeted for 1.2 at the moment.
Right now the table.kwargs is a view into an intricate object that
validates the kwargs and such and is not that simple to turn into an
OrderdedDict right now. For a workaround you'd probably need to do a
regular expression in conjunction with a CreateTable recipe:
from sqlalchemy.ext.compiler import compiles
from sqlalchemy.sql.schema import CreateTable
@compiles(CreateTable, "mysql")
def _fix_args(element, compiler, **kw):
text = compiler.visit_create_table(element, **kw)
sample_pages = element.kwargs.get('mysql_stats_sample_pages')
if sample_pages:
text = re.sub(r'STATS_SAMPLE_PAGES=\d+', '', text)
# append to the end
text += 'STATS_SAMPLE_PAGES=%s' % sample_pages
return text
On 04/05/2017 07:37 PM, T Johnson wrote:
I have a script.py that does roughly this:
|
import sqlalchemy as sa
engine = ...
part_text = """RANGE COLUMNS (my_date) (
PARTITION p20161017 VALUES LESS THAN ('2016-10-18'),
PARTITION p20161018 VALUES LESS THAN ('2016-10-19'),
PARTITION p99991231 VALUES LESS THAN (MAXVALUE)
)"""
t = sa.Table(
'test',
sa.MetaData(),
sa.Column('test_id', sa.INTEGER),
sa.Column('my_date', sa.DATE),
mysql_stats_sample_pages='4',
mysql_partition_by=part_text
)
print(sa.schema.CreateTable(t).compile(engine))
|
The order of the table and partition options are not respected
(https://dev.mysql.com/doc/refman/5.7/en/create-table.html) and this
causes a syntax error. It looks like this has to do with Table using
kwargs. While I can move up to 3.6, would that even fix the issue in
this situation? Is there some way I can get this working properly
without upgrading SQLAlchemy?
|
$ PYTHONHASHSEED=100 python script.py # invalid SQL
CREATE TABLE test (
test_id INTEGER,
my_date DATE
)PARTITION BY RANGE COLUMNS (my_date) (
PARTITION p20161017 VALUES LESS THAN ('2016-10-18'),
PARTITION p20161018 VALUES LESS THAN ('2016-10-19'),
PARTITION p99991231 VALUES LESS THAN (MAXVALUE)
) STATS_SAMPLE_PAGES=4
|
|
$ PYTHONHASHSEED=1 python script.py # correct SQL
CREATE TABLE test (
test_id INTEGER,
my_date DATE
)STATS_SAMPLE_PAGES=4 PARTITION BY RANGE COLUMNS (my_date) (
PARTITION p20161017 VALUES LESS THAN ('2016-10-18'),
PARTITION p20161018 VALUES LESS THAN ('2016-10-19'),
PARTITION p99991231 VALUES LESS THAN (MAXVALUE)
)
|
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http://www.sqlalchemy.org/
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SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE: Minimal, Complete, and Verifiable
Example. See http://stackoverflow.com/help/mcve for a full description.
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