69 lines
1.3 KiB
Ruby
69 lines
1.3 KiB
Ruby
module Gitlab
|
|
module Database
|
|
def self.adapter_name
|
|
connection.adapter_name
|
|
end
|
|
|
|
def self.mysql?
|
|
adapter_name.casecmp('mysql2').zero?
|
|
end
|
|
|
|
def self.postgresql?
|
|
adapter_name.casecmp('postgresql').zero?
|
|
end
|
|
|
|
def self.version
|
|
database_version.match(/\A(?:PostgreSQL |)([^\s]+).*\z/)[1]
|
|
end
|
|
|
|
def self.nulls_last_order(field, direction = 'ASC')
|
|
order = "#{field} #{direction}"
|
|
|
|
if Gitlab::Database.postgresql?
|
|
order << ' NULLS LAST'
|
|
else
|
|
# `field IS NULL` will be `0` for non-NULL columns and `1` for NULL
|
|
# columns. In the (default) ascending order, `0` comes first.
|
|
order.prepend("#{field} IS NULL, ") if direction == 'ASC'
|
|
end
|
|
|
|
order
|
|
end
|
|
|
|
def self.random
|
|
Gitlab::Database.postgresql? ? "RANDOM()" : "RAND()"
|
|
end
|
|
|
|
def true_value
|
|
if Gitlab::Database.postgresql?
|
|
"'t'"
|
|
else
|
|
1
|
|
end
|
|
end
|
|
|
|
def false_value
|
|
if Gitlab::Database.postgresql?
|
|
"'f'"
|
|
else
|
|
0
|
|
end
|
|
end
|
|
|
|
private
|
|
|
|
def self.connection
|
|
ActiveRecord::Base.connection
|
|
end
|
|
|
|
def self.database_version
|
|
row = connection.execute("SELECT VERSION()").first
|
|
|
|
if postgresql?
|
|
row['version']
|
|
else
|
|
row.first
|
|
end
|
|
end
|
|
end
|
|
end
|