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# frozen_string_literal: true
require_relative "../helper"
module Arel
module Visitors
class MysqlTest < Arel::Spec
before do
@visitor = MySQL.new Table.engine.connection
end
def compile(node)
@visitor.accept(node, Collectors::SQLString.new).value
end
###
# :'(
# http://dev.mysql.com/doc/refman/5.0/en/select.html#id3482214
it "defaults limit to 18446744073709551615" do
stmt = Nodes::SelectStatement.new
stmt.offset = Nodes::Offset.new(1)
sql = compile(stmt)
sql.must_be_like "SELECT FROM DUAL LIMIT 18446744073709551615 OFFSET 1"
end
it "should escape LIMIT" do
sc = Arel::Nodes::UpdateStatement.new
sc.relation = Table.new(:users)
sc.limit = Nodes::Limit.new(Nodes.build_quoted("omg"))
assert_equal("UPDATE \"users\" LIMIT 'omg'", compile(sc))
end
it "uses DUAL for empty from" do
stmt = Nodes::SelectStatement.new
sql = compile(stmt)
sql.must_be_like "SELECT FROM DUAL"
end
describe "locking" do
it "defaults to FOR UPDATE when locking" do
node = Nodes::Lock.new(Arel.sql("FOR UPDATE"))
compile(node).must_be_like "FOR UPDATE"
end
it "allows a custom string to be used as a lock" do
node = Nodes::Lock.new(Arel.sql("LOCK IN SHARE MODE"))
compile(node).must_be_like "LOCK IN SHARE MODE"
end
end
describe "concat" do
it "concats columns" do
@table = Table.new(:users)
query = @table[:name].concat(@table[:name])
compile(query).must_be_like %{
CONCAT("users"."name", "users"."name")
}
end
it "concats a string" do
@table = Table.new(:users)
query = @table[:name].concat(Nodes.build_quoted("abc"))
compile(query).must_be_like %{
CONCAT("users"."name", 'abc')
}
end
end
describe "Nodes::IsNotDistinctFrom" do
it "should construct a valid generic SQL statement" do
test = Table.new(:users)[:name].is_not_distinct_from "Aaron Patterson"
compile(test).must_be_like %{
"users"."name" <=> 'Aaron Patterson'
}
end
it "should handle column names on both sides" do
test = Table.new(:users)[:first_name].is_not_distinct_from Table.new(:users)[:last_name]
compile(test).must_be_like %{
"users"."first_name" <=> "users"."last_name"
}
end
it "should handle nil" do
@table = Table.new(:users)
val = Nodes.build_quoted(nil, @table[:active])
sql = compile Nodes::IsNotDistinctFrom.new(@table[:name], val)
sql.must_be_like %{ "users"."name" <=> NULL }
end
end
describe "Nodes::IsDistinctFrom" do
it "should handle column names on both sides" do
test = Table.new(:users)[:first_name].is_distinct_from Table.new(:users)[:last_name]
compile(test).must_be_like %{
NOT "users"."first_name" <=> "users"."last_name"
}
end
it "should handle nil" do
@table = Table.new(:users)
val = Nodes.build_quoted(nil, @table[:active])
sql = compile Nodes::IsDistinctFrom.new(@table[:name], val)
sql.must_be_like %{ NOT "users"."name" <=> NULL }
end
end
end
end
end
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