blob: 2ddbec326685326b80fcfe304f6a0dadbb6584cd (
plain) (
tree)
|
|
# frozen_string_literal: true
require_relative "../helper"
module Arel
module Visitors
class IbmDbTest < Arel::Spec
before do
@visitor = IBM_DB.new Table.engine.connection
end
def compile(node)
@visitor.accept(node, Collectors::SQLString.new).value
end
it "uses FETCH FIRST n ROWS to limit results" do
stmt = Nodes::SelectStatement.new
stmt.limit = Nodes::Limit.new(1)
sql = compile(stmt)
sql.must_be_like "SELECT FETCH FIRST 1 ROWS ONLY"
end
it "uses FETCH FIRST n ROWS in updates with a limit" do
table = Table.new(:users)
stmt = Nodes::UpdateStatement.new
stmt.relation = table
stmt.limit = Nodes::Limit.new(Nodes.build_quoted(1))
stmt.key = table[:id]
sql = compile(stmt)
sql.must_be_like "UPDATE \"users\" WHERE \"users\".\"id\" IN (SELECT \"users\".\"id\" FROM \"users\" FETCH FIRST 1 ROWS ONLY)"
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 %{
DECODE("users"."name", 'Aaron Patterson', 0, 1) = 0
}
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 %{
DECODE("users"."first_name", "users"."last_name", 0, 1) = 0
}
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" IS 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 %{
DECODE("users"."first_name", "users"."last_name", 0, 1) = 1
}
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 %{ "users"."name" IS NOT NULL }
end
end
end
end
end
|