# encoding: utf-8 require 'spec_helper' describe SQL::Generator::Relation::Unary, '#visit_veritas_relation_operation_offset' do subject { object.visit_veritas_relation_operation_offset(offset) } let(:relation_name) { 'users' } let(:id) { Attribute::Integer.new(:id) } let(:name) { Attribute::String.new(:name) } let(:age) { Attribute::Integer.new(:age, :required => false) } let(:header) { [ id, name, age ] } let(:body) { [ [ 1, 'Dan Kubb', 35 ] ].each } let(:base_relation) { Relation::Base.new(relation_name, header, body) } let(:offset) { operand.drop(1) } let(:object) { described_class.new } context 'when the operand is a base relation' do let(:operand) { base_relation.sort_by { |r| [ r.id, r.name, r.age ] } } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT "id", "name", "age" FROM "users" ORDER BY "id", "name", "age" OFFSET 1') } its(:to_subquery) { should eql('(SELECT * FROM "users" ORDER BY "id", "name", "age" OFFSET 1)') } end context 'when the operand is a projection' do let(:operand) { base_relation.project([ :id, :name ]).sort_by { |r| [ r.id, r.name ] } } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT DISTINCT "id", "name" FROM "users" ORDER BY "id", "name" OFFSET 1') } its(:to_subquery) { should eql('(SELECT DISTINCT "id", "name" FROM "users" ORDER BY "id", "name" OFFSET 1)') } end context 'when the operand is an extension' do let(:operand) { base_relation.extend { |r| r.add(:one, 1) }.sort_by { |r| [ r.id, r.name, r.age, r.one ] } } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT "id", "name", "age", 1 AS "one" FROM "users" ORDER BY "id", "name", "age", "one" OFFSET 1') } its(:to_subquery) { should eql('(SELECT *, 1 AS "one" FROM "users" ORDER BY "id", "name", "age", "one" OFFSET 1)') } end context 'when the operand is a rename' do let(:operand) { base_relation.sort_by { |r| [ r.id, r.name, r.age ] }.rename(:id => :user_id) } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT "id" AS "user_id", "name", "age" FROM "users" ORDER BY "id", "name", "age" OFFSET 1') } its(:to_subquery) { should eql('(SELECT "id" AS "user_id", "name", "age" FROM "users" ORDER BY "id", "name", "age" OFFSET 1)') } end context 'when the operand is a restriction' do let(:operand) { base_relation.restrict { |r| r.id.eq(1) }.sort_by { |r| [ r.id, r.name, r.age ] } } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT "id", "name", "age" FROM "users" WHERE "id" = 1 ORDER BY "id", "name", "age" OFFSET 1') } its(:to_subquery) { should eql('(SELECT * FROM "users" WHERE "id" = 1 ORDER BY "id", "name", "age" OFFSET 1)') } end context 'when the operand is a summarization' do context 'summarize per table dee' do let(:summarize_per) { TABLE_DEE } let(:operand) { base_relation.summarize(summarize_per) { |r| r.add(:count, r.id.count) }.sort_by { |r| r.count } } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT COUNT ("id") AS "count" FROM "users" ORDER BY "count" OFFSET 1') } its(:to_subquery) { should eql('(SELECT COUNT ("id") AS "count" FROM "users" ORDER BY "count" OFFSET 1)') } end context 'summarize per table dum' do let(:summarize_per) { TABLE_DUM } let(:operand) { base_relation.summarize(summarize_per) { |r| r.add(:count, r.id.count) }.sort_by { |r| r.count } } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT COUNT ("id") AS "count" FROM "users" HAVING FALSE ORDER BY "count" OFFSET 1') } its(:to_subquery) { should eql('(SELECT COUNT ("id") AS "count" FROM "users" HAVING FALSE ORDER BY "count" OFFSET 1)') } end context 'summarize by a subset of the operand header' do let(:operand) { base_relation.summarize([ :id, :name ]) { |r| r.add(:count, r.age.count) }.sort_by { |r| [ r.id, r.name, r.count ] } } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT "id", "name", COUNT ("age") AS "count" FROM "users" GROUP BY "id", "name" HAVING COUNT (*) > 0 ORDER BY "id", "name", "count" OFFSET 1') } its(:to_subquery) { should eql('(SELECT "id", "name", COUNT ("age") AS "count" FROM "users" GROUP BY "id", "name" HAVING COUNT (*) > 0 ORDER BY "id", "name", "count" OFFSET 1)') } end end context 'when the operand is ordered' do let(:operand) { base_relation.sort_by { |r| [ r.id, r.name, r.age ] } } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT "id", "name", "age" FROM "users" ORDER BY "id", "name", "age" OFFSET 1') } its(:to_subquery) { should eql('(SELECT * FROM "users" ORDER BY "id", "name", "age" OFFSET 1)') } end context 'when the operand is reversed' do let(:operand) { base_relation.sort_by { |r| [ r.id, r.name, r.age ] }.reverse } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT "id", "name", "age" FROM "users" ORDER BY "id" DESC, "name" DESC, "age" DESC OFFSET 1') } its(:to_subquery) { should eql('(SELECT * FROM "users" ORDER BY "id" DESC, "name" DESC, "age" DESC OFFSET 1)') } end context 'when the operand is limited' do let(:operand) { base_relation.sort_by { |r| [ r.id, r.name, r.age ] }.take(1) } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT "id", "name", "age" FROM (SELECT * FROM "users" ORDER BY "id", "name", "age" LIMIT 1) AS "users" OFFSET 1') } its(:to_subquery) { should eql('(SELECT * FROM (SELECT * FROM "users" ORDER BY "id", "name", "age" LIMIT 1) AS "users" OFFSET 1)') } end context 'when the operand is an offset' do let(:operand) { base_relation.sort_by { |r| [ r.id, r.name, r.age ] }.drop(1) } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT "id", "name", "age" FROM (SELECT * FROM "users" ORDER BY "id", "name", "age" OFFSET 1) AS "users" OFFSET 1') } its(:to_subquery) { should eql('(SELECT * FROM (SELECT * FROM "users" ORDER BY "id", "name", "age" OFFSET 1) AS "users" OFFSET 1)') } end context 'when the operand is a difference' do let(:operand) { base_relation.difference(base_relation).sort_by { |r| [ r.id, r.name, r.age ] } } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT "id", "name", "age" FROM ((SELECT "id", "name", "age" FROM "users") EXCEPT (SELECT "id", "name", "age" FROM "users")) AS "users" ORDER BY "id", "name", "age" OFFSET 1') } its(:to_subquery) { should eql('(SELECT * FROM ((SELECT "id", "name", "age" FROM "users") EXCEPT (SELECT "id", "name", "age" FROM "users")) AS "users" ORDER BY "id", "name", "age" OFFSET 1)') } end context 'when the operand is an intersection' do let(:operand) { base_relation.intersect(base_relation).sort_by { |r| [ r.id, r.name, r.age ] } } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT "id", "name", "age" FROM ((SELECT "id", "name", "age" FROM "users") INTERSECT (SELECT "id", "name", "age" FROM "users")) AS "users" ORDER BY "id", "name", "age" OFFSET 1') } its(:to_subquery) { should eql('(SELECT * FROM ((SELECT "id", "name", "age" FROM "users") INTERSECT (SELECT "id", "name", "age" FROM "users")) AS "users" ORDER BY "id", "name", "age" OFFSET 1)') } end context 'when the operand is a union' do let(:operand) { base_relation.union(base_relation).sort_by { |r| [ r.id, r.name, r.age ] } } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT "id", "name", "age" FROM ((SELECT "id", "name", "age" FROM "users") UNION (SELECT "id", "name", "age" FROM "users")) AS "users" ORDER BY "id", "name", "age" OFFSET 1') } its(:to_subquery) { should eql('(SELECT * FROM ((SELECT "id", "name", "age" FROM "users") UNION (SELECT "id", "name", "age" FROM "users")) AS "users" ORDER BY "id", "name", "age" OFFSET 1)') } end context 'when the operand is a join' do let(:operand) { base_relation.join(base_relation).sort_by { |r| [ r.id, r.name, r.age ] } } it_should_behave_like 'a generated SQL SELECT query' its(:to_s) { should eql('SELECT "id", "name", "age" FROM (SELECT * FROM "users" AS "left" NATURAL JOIN "users" AS "right") AS "users" ORDER BY "id", "name", "age" OFFSET 1') } its(:to_subquery) { should eql('(SELECT * FROM (SELECT * FROM "users" AS "left" NATURAL JOIN "users" AS "right") AS "users" ORDER BY "id", "name", "age" OFFSET 1)') } end end