I don't quite understand why SQLA generates this query. For some reason it
wraps the union part into a separate select. How can I avoid this?
b_id = 2
s_id = 3
id = product.c.id
sel = select(
[b_id, product.c.id],
).union(
select([b_id, s_id])
)
ins = insert(product).from_select([
product.c.id, product.c.other_id
],
sel
)
print ins
# produces:
# INSERT INTO product (id, other_id) SELECT 2, id
# FROM (SELECT 2, product.id AS id
# FROM product UNION SELECT 2, 3)
# I would expect:
# INSERT INTO product (id, other_id) FROM
# SELECT 2, product.id AS id FROM product
# UNION
# SELECT 2, 3
Where is the additional `SELECT 2, id` coming from?
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