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"""
Constants specific to the SQL storage portion of the ORM.
"""
import re
# Size of each "chunk" for get_iterator calls.
# Larger values are slightly faster at the expense of more storage space.
GET_ITERATOR_CHUNK_SIZE = 100
# Namedtuples for sql.* internal use.
# How many results to expect from a cursor.execute call
MULTI = 'multi'
SINGLE = 'single'
CURSOR = 'cursor'
NO_RESULTS = 'no results'
ORDER_PATTERN = re.compile(r'\?|[-+]?[.\w]+$')
ORDER_DIR = {
'ASC': ('ASC', 'DESC'),
'DESC': ('DESC', 'ASC'),
}
# SQL join types.
INNER = 'INNER JOIN'
LOUTER = 'LEFT OUTER JOIN'