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| author | Ryuta Kamizono <kamipo@gmail.com> | 2017-12-20 05:09:49 +0900 |
|---|---|---|
| committer | Ryuta Kamizono <kamipo@gmail.com> | 2017-12-20 06:41:10 +0900 |
| commit | c6cd9a59f200863ccfe8ad1d9c5a8876c39b9c5c (patch) | |
| tree | 2fbbd9af309f7e01c43a6571744d824ad1f8ae97 /guides/source/kindle | |
| parent | eb6baccda26d65c70d0e2df28c6cd51ec3cdb2ac (diff) | |
| download | rails-c6cd9a59f200863ccfe8ad1d9c5a8876c39b9c5c.tar.gz rails-c6cd9a59f200863ccfe8ad1d9c5a8876c39b9c5c.tar.bz2 rails-c6cd9a59f200863ccfe8ad1d9c5a8876c39b9c5c.zip | |
Fix `count(:all)` to correctly work `distinct` with custom SELECT list
Currently `count(:all)` with `distinct` doesn't work correctly because
SELECT list is always replaced to `*` or primary key in that case even
if having custom SELECT list.
And also, PostgreSQL has a limitation that ORDER BY expressions must
appear in select list for SELECT DISTINCT.
Therefore, we should not replace custom SELECT list when using
`count(:all)` with `distinct`.
Closes #31277.
Diffstat (limited to 'guides/source/kindle')
0 files changed, 0 insertions, 0 deletions