[Sqlalchemy-tickets] [sqlalchemy] #875: Implement synonyms attached to no particular column

[sqlalchemy <mi...@zz...>]

Izg3NTogSW1wbGVtZW50IHN5bm9ueW1zIGF0dGFjaGVkIHRvIG5vIHBhcnRpY3VsYXIgY29sdW1u
DQotLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tKy0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t
LS0tLS0tLS0tLS0tLS0tLS0tLS0tDQogUmVwb3J0ZXI6ICBnZWQgICAgICAgICAgfCAgICAgICAg
ICBPd25lcjogIHp6emVlayAgICAgICAgICAgICAgICANCiAgICAgVHlwZTogIGVuaGFuY2VtZW50
ICB8ICAgICAgICAgU3RhdHVzOiAgbmV3ICAgICAgICAgICAgICAgICAgIA0KIFByaW9yaXR5OiAg
bWVkaXVtICAgICAgIHwgICAgICBNaWxlc3RvbmU6ICAgICAgICAgICAgICAgICAgICAgICAgDQpD
b21wb25lbnQ6ICBvcm0gICAgICAgICAgfCAgICAgICBTZXZlcml0eTogIG5vIHRyaWFnZSBzZWxl
Y3RlZCB5ZXQNCiBLZXl3b3JkczogICAgICAgICAgICAgICB8ICAgU3RhdHVzX2ZpZWxkOiAgYXdh
aXRpbmcgdHJpYWdlICAgICAgIA0KLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLSstLS0tLS0tLS0t
LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLQ0KIFRoaXMgaXMgbWVhbnQg
c28gdGhhdCAic3RhbmRhcmQiIHB5dGhvbiBwcm9wZXJ0aWVzIGNhbiBiZSB1c2VkIGluIGZpbHRl
cg0KIGFuZCBmaWx0ZXJfYnkuDQoNCiBEaXNjdXNzZWQgaW4gdGhlIGZvbGxvd2luZyB0aHJlYWQ6
DQogaHR0cDovL2dyb3Vwcy5nb29nbGUuY29tL2dyb3VwL3NxbGFsY2hlbXkvdC80MDA4ODFjMjEx
MzEzNmFmDQoNCiByZWxhdGVzIHRvIHRpY2tldCAjODAxDQoNCi0tIA0KVGlja2V0IFVSTDogPGh0
dHA6Ly93d3cuc3FsYWxjaGVteS5vcmcvdHJhYy90aWNrZXQvODc1Pg0Kc3FsYWxjaGVteSA8aHR0
cDovL3d3dy5zcWxhbGNoZW15Lm9yZy8+DQpUaGUgRGF0YWJhc2UgVG9vbGtpdCBmb3IgUHl0aG9u