Contents

shared_examples_for "a split-able expression for restrict" do

  let(:split_pred){
    Alf::Predicate.eq(split_attributes.to_a.first, 12)
  }
  let(:stay_pred){
    Alf::Predicate.eq(:a_non_split_attribute, 12)
  }

  context 'with a native predicate' do
    let(:predicate){ Alf::Predicate.native(lambda{ true }) }

    it_should_behave_like "an unoptimizable expression for restrict"
  end

  context 'with no split attributes' do
    let(:predicate){ stay_pred }

    it_should_behave_like "a pass-through expression for restrict"
  end

  context 'with only split attributes' do
    let(:predicate){ split_pred }

    it_should_behave_like "an unoptimizable expression for restrict"
  end

  context 'with split and non-split in a OR' do
    let(:predicate){ split_pred | stay_pred }

    it_should_behave_like "an unoptimizable expression for restrict"
  end

  context 'with split and non-split in a COMP' do
    let(:predicate){ split_pred & stay_pred }

    it_should_behave_like "an optimizable expression for restrict"
  end

  context 'with split and non-split in the same EXPR' do
    let(:predicate){ Alf::Predicate.eq(split_attributes.to_a.first, :a_non_split_attribute) }

    it_should_behave_like "an unoptimizable expression for restrict"
  end

end

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
alf-core-0.15.0	spec/unit/alf-optimizer/shared/a_split_able_expression_for_restrict.rb
alf-core-0.14.0	spec/unit/alf-optimizer/shared/a_split_able_expression_for_restrict.rb
alf-core-0.13.1	spec/unit/alf-optimizer/shared/a_split_able_expression_for_restrict.rb
alf-core-0.13.0	spec/unit/alf-optimizer/shared/a_split_able_expression_for_restrict.rb