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require 'helper'
class TC_Integration_Aggregate < SQLite3::TestCase
def setup
@db = SQLite3::Database.new(":memory:")
@db.transaction do
@db.execute "create table foo ( a integer primary key, b text, c integer )"
@db.execute "insert into foo ( b, c ) values ( 'foo', 10 )"
@db.execute "insert into foo ( b, c ) values ( 'bar', 11 )"
@db.execute "insert into foo ( b, c ) values ( 'bar', 12 )"
end
end
def teardown
@db.close
end
def test_create_aggregate_without_block
step = proc do |ctx,a|
ctx[:sum] ||= 0
ctx[:sum] += a.to_i
end
final = proc { |ctx| ctx.result = ctx[:sum] }
@db.create_aggregate( "accumulate", 1, step, final )
value = @db.get_first_value( "select accumulate(a) from foo" )
assert_equal 6, value
# calling #get_first_value twice don't add up to the latest result
value = @db.get_first_value( "select accumulate(a) from foo" )
assert_equal 6, value
end
def test_create_aggregate_with_block
@db.create_aggregate( "accumulate", 1 ) do
step do |ctx,a|
ctx[:sum] ||= 0
ctx[:sum] += a.to_i
end
finalize { |ctx| ctx.result = ctx[:sum] }
end
value = @db.get_first_value( "select accumulate(a) from foo" )
assert_equal 6, value
end
def test_create_aggregate_with_group_by
@db.create_aggregate( "accumulate", 1 ) do
step do |ctx,a|
ctx[:sum] ||= 0
ctx[:sum] += a.to_i
end
finalize { |ctx| ctx.result = ctx[:sum] }
end
values = @db.execute( "select b, accumulate(c) from foo group by b order by b" )
assert_equal "bar", values[0][0]
assert_equal 23, values[0][1]
assert_equal "foo", values[1][0]
assert_equal 10, values[1][1]
end
def test_create_aggregate_with_the_same_function_twice_in_a_query
@db.create_aggregate( "accumulate", 1 ) do
step do |ctx,a|
ctx[:sum] ||= 0
ctx[:sum] += a.to_i
end
finalize { |ctx| ctx.result = ctx[:sum] }
end
values = @db.get_first_row( "select accumulate(a), accumulate(c) from foo" )
assert_equal 6, values[0]
assert_equal 33, values[1]
end
def test_create_aggregate_with_two_different_functions
@db.create_aggregate( "accumulate", 1 ) do
step do |ctx,a|
ctx[:sum] ||= 0
ctx[:sum] += a.to_i
end
finalize { |ctx| ctx.result = ctx[:sum] }
end
@db.create_aggregate( "multiply", 1 ) do
step do |ctx,a|
ctx[:sum] ||= 1
ctx[:sum] *= a.to_i
end
finalize { |ctx| ctx.result = ctx[:sum] }
end
GC.start
values = @db.get_first_row( "select accumulate(a), multiply(c) from foo" )
assert_equal 6, values[0]
assert_equal 1320, values[1]
value = @db.get_first_value( "select accumulate(c) from foo")
assert_equal 33, value
value = @db.get_first_value( "select multiply(a) from foo")
assert_equal 6, value
end
def test_create_aggregate_overwrite_function
@db.create_aggregate( "accumulate", 1 ) do
step do |ctx,a|
ctx[:sum] ||= 0
ctx[:sum] += a.to_i
end
finalize { |ctx| ctx.result = ctx[:sum] }
end
value = @db.get_first_value( "select accumulate(c) from foo")
assert_equal 33, value
GC.start
@db.create_aggregate( "accumulate", 1 ) do
step do |ctx,a|
ctx[:sum] ||= 1
ctx[:sum] *= a.to_i
end
finalize { |ctx| ctx.result = ctx[:sum] }
end
value = @db.get_first_value( "select accumulate(c) from foo")
assert_equal 1320, value
end
def test_create_aggregate_overwrite_function_with_different_arity
@db.create_aggregate( "accumulate", -1 ) do
step do |ctx,*args|
ctx[:sum] ||= 0
args.each { |a| ctx[:sum] += a.to_i }
end
finalize { |ctx| ctx.result = ctx[:sum] }
end
@db.create_aggregate( "accumulate", 2 ) do
step do |ctx,a,b|
ctx[:sum] ||= 1
ctx[:sum] *= (a.to_i + b.to_i)
end
finalize { |ctx| ctx.result = ctx[:sum] }
end
GC.start
values = @db.get_first_row( "select accumulate(c), accumulate(a,c) from foo")
assert_equal 33, values[0]
assert_equal 2145, values[1]
end
def test_create_aggregate_with_invalid_arity
assert_raise ArgumentError do
@db.create_aggregate( "accumulate", 1000 ) do
step {|ctx,*args| }
finalize { |ctx| }
end
end
end
class CustomException < Exception
end
def test_create_aggregate_with_exception_in_step
@db.create_aggregate( "raiseexception", 1 ) do
step do |ctx,a|
raise CustomException.new( "bogus aggregate handler" )
end
finalize { |ctx| ctx.result = 42 }
end
assert_raise CustomException do
@db.get_first_value( "select raiseexception(a) from foo")
end
end
def test_create_aggregate_with_exception_in_finalize
@db.create_aggregate( "raiseexception", 1 ) do
step do |ctx,a|
raise CustomException.new( "bogus aggregate handler" )
end
finalize do |ctx|
raise CustomException.new( "bogus aggregate handler" )
end
end
assert_raise CustomException do
@db.get_first_value( "select raiseexception(a) from foo")
end
end
def test_create_aggregate_with_no_data
@db.create_aggregate( "accumulate", 1 ) do
step do |ctx,a|
ctx[:sum] ||= 0
ctx[:sum] += a.to_i
end
finalize { |ctx| ctx.result = ctx[:sum] || 0 }
end
value = @db.get_first_value(
"select accumulate(a) from foo where a = 100" )
assert_equal 0, value
end
class AggregateHandler
class << self
def arity; 1; end
def text_rep; SQLite3::Constants::TextRep::ANY; end
def name; "multiply"; end
end
def step(ctx, a)
ctx[:buffer] ||= 1
ctx[:buffer] *= a.to_i
end
def finalize(ctx); ctx.result = ctx[:buffer]; end
end
def test_aggregate_initialized_twice
initialized = 0
handler = Class.new(AggregateHandler) do
define_method(:initialize) do
initialized += 1
super()
end
end
@db.create_aggregate_handler handler
@db.get_first_value( "select multiply(a) from foo" )
@db.get_first_value( "select multiply(a) from foo" )
assert_equal 2, initialized
end
def test_create_aggregate_handler_call_with_wrong_arity
@db.create_aggregate_handler AggregateHandler
assert_raise(SQLite3::SQLException) do
@db.get_first_value( "select multiply(a,c) from foo" )
end
end
class RaiseExceptionStepAggregateHandler
class << self
def arity; 1; end
def text_rep; SQLite3::Constants::TextRep::ANY; end
def name; "raiseexception"; end
end
def step(ctx, a)
raise CustomException.new( "bogus aggregate handler" )
end
def finalize(ctx); ctx.result = nil; end
end
def test_create_aggregate_handler_with_exception_step
@db.create_aggregate_handler RaiseExceptionStepAggregateHandler
assert_raise CustomException do
@db.get_first_value( "select raiseexception(a) from foo")
end
end
class RaiseExceptionNewAggregateHandler
class << self
def name; "raiseexception"; end
end
def initialize
raise CustomException.new( "bogus aggregate handler" )
end
def step(ctx, a); end
def finalize(ctx); ctx.result = nil; end
end
def test_create_aggregate_handler_with_exception_new
@db.create_aggregate_handler RaiseExceptionNewAggregateHandler
assert_raise CustomException do
@db.get_first_value( "select raiseexception(a) from foo")
end
end
def test_create_aggregate_handler
@db.create_aggregate_handler AggregateHandler
value = @db.get_first_value( "select multiply(a) from foo" )
assert_equal 6, value
end
class AccumulateAggregator
def step(*args)
@sum ||= 0
args.each { |a| @sum += a.to_i }
end
def finalize
@sum
end
end
class AccumulateAggregator2
def step(a, b)
@sum ||= 1
@sum *= (a.to_i + b.to_i)
end
def finalize
@sum
end
end
def test_define_aggregator_with_two_different_arities
@db.define_aggregator( "accumulate", AccumulateAggregator.new )
@db.define_aggregator( "accumulate", AccumulateAggregator2.new )
GC.start
values = @db.get_first_row( "select accumulate(c), accumulate(a,c) from foo")
assert_equal 33, values[0]
assert_equal 2145, values[1]
end
end
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