From 0e1427e917a4e47dce9f02ad9309600073622c73 Mon Sep 17 00:00:00 2001 From: Yasuo Honda Date: Tue, 4 Nov 2014 04:44:01 +0900 Subject: Create Arel::Visitors::Oracle12 to provide better top-N query to support `FETCH FIRST n ROWS` and `OFFSET` for Oracle 12c database --- test/visitors/test_oracle12.rb | 47 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 test/visitors/test_oracle12.rb (limited to 'test') diff --git a/test/visitors/test_oracle12.rb b/test/visitors/test_oracle12.rb new file mode 100644 index 0000000000..cfa130fcab --- /dev/null +++ b/test/visitors/test_oracle12.rb @@ -0,0 +1,47 @@ +require 'helper' + +module Arel + module Visitors + describe 'the oracle visitor' do + before do + @visitor = Oracle12.new Table.engine.connection_pool + end + + def compile node + @visitor.accept(node, Collectors::SQLString.new).value + 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 + + it 'generates select options offset then limit' do + stmt = Nodes::SelectStatement.new + stmt.offset = Nodes::Offset.new(1) + stmt.limit = Nodes::Limit.new(Nodes.build_quoted(10)) + sql = compile(stmt) + sql.must_be_like "SELECT OFFSET 1 ROWS FETCH FIRST 10 ROWS ONLY" + end + + describe 'locking' do + it 'removes limit when locking' do + stmt = Nodes::SelectStatement.new + stmt.limit = Nodes::Limit.new(Nodes.build_quoted(10)) + stmt.lock = Nodes::Lock.new(Arel.sql('FOR UPDATE')) + sql = compile(stmt) + sql.must_be_like "SELECT FOR UPDATE" + end + + 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 + end + end +end -- cgit v1.2.3