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# frozen_string_literal: true
require_relative "../helper"
module Arel
module Visitors
class OracleTest < Arel::Spec
before do
@visitor = Oracle.new Table.engine.connection
@table = Table.new(:users)
end
def compile(node)
@visitor.accept(node, Collectors::SQLString.new).value
end
it "modifies order when there is distinct and first value" do
# *sigh*
select = "DISTINCT foo.id, FIRST_VALUE(projects.name) OVER (foo) AS alias_0__"
stmt = Nodes::SelectStatement.new
stmt.cores.first.projections << Nodes::SqlLiteral.new(select)
stmt.orders << Nodes::SqlLiteral.new("foo")
sql = compile(stmt)
sql.must_be_like %{
SELECT #{select} ORDER BY alias_0__
}
end
it "is idempotent with crazy query" do
# *sigh*
select = "DISTINCT foo.id, FIRST_VALUE(projects.name) OVER (foo) AS alias_0__"
stmt = Nodes::SelectStatement.new
stmt.cores.first.projections << Nodes::SqlLiteral.new(select)
stmt.orders << Nodes::SqlLiteral.new("foo")
sql = compile(stmt)
sql2 = compile(stmt)
sql.must_equal sql2
end
it "splits orders with commas" do
# *sigh*
select = "DISTINCT foo.id, FIRST_VALUE(projects.name) OVER (foo) AS alias_0__"
stmt = Nodes::SelectStatement.new
stmt.cores.first.projections << Nodes::SqlLiteral.new(select)
stmt.orders << Nodes::SqlLiteral.new("foo, bar")
sql = compile(stmt)
sql.must_be_like %{
SELECT #{select} ORDER BY alias_0__, alias_1__
}
end
it "splits orders with commas and function calls" do
# *sigh*
select = "DISTINCT foo.id, FIRST_VALUE(projects.name) OVER (foo) AS alias_0__"
stmt = Nodes::SelectStatement.new
stmt.cores.first.projections << Nodes::SqlLiteral.new(select)
stmt.orders << Nodes::SqlLiteral.new("NVL(LOWER(bar, foo), foo) DESC, UPPER(baz)")
sql = compile(stmt)
sql.must_be_like %{
SELECT #{select} ORDER BY alias_0__ DESC, alias_1__
}
end
describe "Nodes::SelectStatement" do
describe "limit" do
it "adds a rownum clause" do
stmt = Nodes::SelectStatement.new
stmt.limit = Nodes::Limit.new(10)
sql = compile stmt
sql.must_be_like %{ SELECT WHERE ROWNUM <= 10 }
end
it "is idempotent" do
stmt = Nodes::SelectStatement.new
stmt.orders << Nodes::SqlLiteral.new("foo")
stmt.limit = Nodes::Limit.new(10)
sql = compile stmt
sql2 = compile stmt
sql.must_equal sql2
end
it "creates a subquery when there is order_by" do
stmt = Nodes::SelectStatement.new
stmt.orders << Nodes::SqlLiteral.new("foo")
stmt.limit = Nodes::Limit.new(10)
sql = compile stmt
sql.must_be_like %{
SELECT * FROM (SELECT ORDER BY foo ) WHERE ROWNUM <= 10
}
end
it "creates a subquery when there is group by" do
stmt = Nodes::SelectStatement.new
stmt.cores.first.groups << Nodes::SqlLiteral.new("foo")
stmt.limit = Nodes::Limit.new(10)
sql = compile stmt
sql.must_be_like %{
SELECT * FROM (SELECT GROUP BY foo ) WHERE ROWNUM <= 10
}
end
it "creates a subquery when there is DISTINCT" do
stmt = Nodes::SelectStatement.new
stmt.cores.first.set_quantifier = Arel::Nodes::Distinct.new
stmt.cores.first.projections << Nodes::SqlLiteral.new("id")
stmt.limit = Arel::Nodes::Limit.new(10)
sql = compile stmt
sql.must_be_like %{
SELECT * FROM (SELECT DISTINCT id ) WHERE ROWNUM <= 10
}
end
it "creates a different subquery when there is an offset" do
stmt = Nodes::SelectStatement.new
stmt.limit = Nodes::Limit.new(10)
stmt.offset = Nodes::Offset.new(10)
sql = compile stmt
sql.must_be_like %{
SELECT * FROM (
SELECT raw_sql_.*, rownum raw_rnum_
FROM (SELECT ) raw_sql_
WHERE rownum <= 20
)
WHERE raw_rnum_ > 10
}
end
it "creates a subquery when there is limit and offset with BindParams" do
stmt = Nodes::SelectStatement.new
stmt.limit = Nodes::Limit.new(Nodes::BindParam.new(1))
stmt.offset = Nodes::Offset.new(Nodes::BindParam.new(1))
sql = compile stmt
sql.must_be_like %{
SELECT * FROM (
SELECT raw_sql_.*, rownum raw_rnum_
FROM (SELECT ) raw_sql_
WHERE rownum <= (:a1 + :a2)
)
WHERE raw_rnum_ > :a3
}
end
it "is idempotent with different subquery" do
stmt = Nodes::SelectStatement.new
stmt.limit = Nodes::Limit.new(10)
stmt.offset = Nodes::Offset.new(10)
sql = compile stmt
sql2 = compile stmt
sql.must_equal sql2
end
end
describe "only offset" do
it "creates a select from subquery with rownum condition" do
stmt = Nodes::SelectStatement.new
stmt.offset = Nodes::Offset.new(10)
sql = compile stmt
sql.must_be_like %{
SELECT * FROM (
SELECT raw_sql_.*, rownum raw_rnum_
FROM (SELECT) raw_sql_
)
WHERE raw_rnum_ > 10
}
end
end
end
it "modified except to be minus" do
left = Nodes::SqlLiteral.new("SELECT * FROM users WHERE age > 10")
right = Nodes::SqlLiteral.new("SELECT * FROM users WHERE age > 20")
sql = compile Nodes::Except.new(left, right)
sql.must_be_like %{
( SELECT * FROM users WHERE age > 10 MINUS SELECT * FROM users WHERE age > 20 )
}
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
end
describe "Nodes::BindParam" do
it "increments each bind param" do
query = @table[:name].eq(Arel::Nodes::BindParam.new(1))
.and(@table[:id].eq(Arel::Nodes::BindParam.new(1)))
compile(query).must_be_like %{
"users"."name" = :a1 AND "users"."id" = :a2
}
end
end
end
end
end
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