2010-09-24 12:41:48 -04:00
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require 'spec_helper'
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module Arel
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module Visitors
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describe 'the oracle visitor' do
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before do
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@visitor = Oracle.new Table.engine
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end
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describe 'Nodes::SelectStatement' do
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describe 'limit' do
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it 'adds a rownum clause' do
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stmt = Nodes::SelectStatement.new
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stmt.limit = 10
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sql = @visitor.accept stmt
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sql.should be_like %{ SELECT WHERE ROWNUM <= 10 }
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end
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2010-09-24 13:09:21 -04:00
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it 'creates a subquery when there is order_by' do
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stmt = Nodes::SelectStatement.new
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stmt.orders << Nodes::SqlLiteral.new('foo')
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stmt.limit = 10
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sql = @visitor.accept stmt
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sql.should be_like %{
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SELECT * FROM (SELECT ORDER BY foo) WHERE ROWNUM <= 10
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}
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end
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2010-09-24 13:24:31 -04:00
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it 'creates a different subquery when there is an offset' do
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stmt = Nodes::SelectStatement.new
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stmt.limit = 10
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stmt.offset = Nodes::Offset.new(10)
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sql = @visitor.accept stmt
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sql.should be_like %{
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SELECT * FROM (
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SELECT raw_sql_.*, rownum raw_rnum_
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FROM (SELECT ) raw_sql_
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WHERE rownum <= 20
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)
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WHERE raw_rnum_ > 10
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}
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end
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2010-09-24 12:41:48 -04:00
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end
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end
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end
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end
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end
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