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[IMP] core: inline SELECT many2one as subquery for one2many fields

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This avoids the standalone query with a SELECT DISTINCT, which is costly
to execute, and enables potential optimizations in the query execution.
This commit is contained in:
Raphael Collet
2020-08-18 13:02:41 +00:00
parent 1a0feab95d
commit 89963e0edd
2 changed files with 27 additions and 57 deletions
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odoo/osv/expression.py
+9 -27
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@@ -447,24 +447,6 @@ def check_leaf(element, internal=False):
# SQL utils
# --------------------------------------------------
def select_from_where(cr, select_field, from_table, where_field, where_ids, where_operator):
# todo: merge into parent query as sub-query
res = []
if where_ids:
if where_operator in ['<', '>', '>=', '<=']:
cr.execute('SELECT DISTINCT "%s" FROM "%s" WHERE "%s" %s %%s' % \
(select_field, from_table, where_field, where_operator),
(where_ids[0],)) # TODO shouldn't this be min/max(where_ids) ?
res = [r[0] for r in cr.fetchall()]
else: # TODO where_operator is supposed to be 'in'? It is called with child_of...
for i in range(0, len(where_ids), cr.IN_MAX):
subids = where_ids[i:i + cr.IN_MAX]
cr.execute('SELECT DISTINCT "%s" FROM "%s" WHERE "%s" IN %%s' % \
(select_field, from_table, where_field), (tuple(subids),))
res.extend([r[0] for r in cr.fetchall()])
return res
def get_unaccent_wrapper(cr):
if odoo.registry(cr.dbname).has_unaccent:
return lambda x: "unaccent(%s)" % (x,)
@@ -816,18 +798,18 @@ class expression(object):
if ids2 and inverse_is_int and domain:
ids2 = comodel.search([('id', 'in', ids2)] + domain, order='id').ids
# determine ids1 in model related to ids2
if not ids2:
ids1 = []
elif comodel._fields[field.inverse_name].store:
ids1 = select_from_where(cr, field.inverse_name, comodel._table, 'id', ids2, operator)
if ids2 and comodel._fields[field.inverse_name].store:
op1 = 'not inselect' if operator in NEGATIVE_TERM_OPERATORS else 'inselect'
subquery = 'SELECT "%s" FROM "%s" WHERE "id" IN %%s' % (field.inverse_name, comodel._table)
subparams = [tuple(ids2)]
push(('id', op1, (subquery, subparams)), model, alias, internal=True)
else:
# determine ids1 in model related to ids2
recs = comodel.browse(ids2).sudo().with_context(prefetch_fields=False)
ids1 = unwrap_inverse(recs.mapped(field.inverse_name))
# rewrite condition in terms of ids1
op1 = 'not in' if operator in NEGATIVE_TERM_OPERATORS else 'in'
push(('id', op1, ids1), model, alias)
# rewrite condition in terms of ids1
op1 = 'not in' if operator in NEGATIVE_TERM_OPERATORS else 'in'
push(('id', op1, ids1), model, alias)
else:
if comodel._fields[field.inverse_name].store and not (inverse_is_int and domain):