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// Copyright 2017 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package chunk
import (
"github.com/pingcap/check"
"github.com/pingcap/parser/mysql"
"github.com/pingcap/tidb/types"
)
func (s *testChunkSuite) TestIteratorOnSel(c *check.C) {
fields := []*types.FieldType{types.NewFieldType(mysql.TypeLonglong)}
chk := New(fields, 32, 1024)
sel := make([]int, 0, 1024)
for i := 0; i < 1024; i++ {
chk.AppendInt64(0, int64(i))
if i%2 == 0 {
sel = append(sel, i)
}
}
chk.SetSel(sel)
it := NewIterator4Chunk(chk)
cnt := 0
for row := it.Begin(); row != it.End(); row = it.Next() {
c.Assert(row.GetInt64(0)%2, check.Equals, int64(0))
cnt++
}
c.Assert(cnt, check.Equals, 1024/2)
}
func checkEqual(it Iterator, exp []int64, c *check.C) {
for row, i := it.Begin(), 0; row != it.End(); row, i = it.Next(), i+1 {
c.Assert(row.GetInt64(0), check.Equals, exp[i])
}
}
func (s *testChunkSuite) TestMultiIterator(c *check.C) {
it := NewMultiIterator(NewIterator4Chunk(new(Chunk)))
c.Assert(it.Begin(), check.Equals, it.End())
it = NewMultiIterator(NewIterator4Chunk(new(Chunk)), NewIterator4List(new(List)))
c.Assert(it.Begin(), check.Equals, it.End())
fields := []*types.FieldType{types.NewFieldType(mysql.TypeLonglong)}
chk := New(fields, 32, 1024)
n := 10
var expected []int64
for i := 0; i < n; i++ {
chk.AppendInt64(0, int64(i))
expected = append(expected, int64(i))
}
it = NewMultiIterator(NewIterator4Chunk(chk))
checkEqual(it, expected, c)
it = NewMultiIterator(NewIterator4Chunk(new(Chunk)), NewIterator4Chunk(chk), NewIterator4Chunk(new(Chunk)))
checkEqual(it, expected, c)
li := NewList(fields, 32, 1024)
chk2 := New(fields, 32, 1024)
for i := n; i < n*2; i++ {
expected = append(expected, int64(i))
chk2.AppendInt64(0, int64(i))
}
li.Add(chk2)
checkEqual(NewMultiIterator(NewIterator4Chunk(chk), NewIterator4Chunk(chk2)), expected, c)
checkEqual(NewMultiIterator(NewIterator4Chunk(chk), NewIterator4List(li)), expected, c)
rc := &RowContainer{}
rc.m.records = li
checkEqual(NewMultiIterator(NewIterator4Chunk(chk), NewIterator4RowContainer(rc)), expected, c)
li.Clear()
li.Add(chk)
checkEqual(NewMultiIterator(NewIterator4List(li), NewIterator4Chunk(chk2)), expected, c)
rc = &RowContainer{}
rc.m.records = new(List)
checkEqual(NewMultiIterator(NewIterator4RowContainer(rc), NewIterator4List(li), NewIterator4Chunk(chk2)), expected, c)
}
func (s *testChunkSuite) TestIterator(c *check.C) {
fields := []*types.FieldType{types.NewFieldType(mysql.TypeLonglong)}
chk := New(fields, 32, 1024)
n := 10
var expected []int64
for i := 0; i < n; i++ {
chk.AppendInt64(0, int64(i))
expected = append(expected, int64(i))
}
var rows []Row
li := NewList(fields, 1, 2)
li2 := NewList(fields, 8, 16)
var ptrs []RowPtr
var ptrs2 []RowPtr
for i := 0; i < n; i++ {
rows = append(rows, chk.GetRow(i))
ptr := li.AppendRow(chk.GetRow(i))
ptrs = append(ptrs, ptr)
ptr2 := li2.AppendRow(chk.GetRow(i))
ptrs2 = append(ptrs2, ptr2)
}
it := NewIterator4Slice(rows)
checkIterator(c, it, expected)
it.Begin()
for i := 0; i < 5; i++ {
c.Assert(it.Current(), check.Equals, rows[i])
it.Next()
}
it.ReachEnd()
c.Assert(it.Current(), check.Equals, it.End())
c.Assert(it.Begin(), check.Equals, rows[0])
it = NewIterator4Chunk(chk)
checkIterator(c, it, expected)
it.Begin()
for i := 0; i < 5; i++ {
c.Assert(it.Current(), check.Equals, chk.GetRow(i))
it.Next()
}
it.ReachEnd()
c.Assert(it.Current(), check.Equals, it.End())
c.Assert(it.Begin(), check.Equals, chk.GetRow(0))
it = NewIterator4List(li)
checkIterator(c, it, expected)
it.Begin()
for i := 0; i < 5; i++ {
c.Assert(it.Current(), check.Equals, li.GetRow(ptrs[i]))
it.Next()
}
it.ReachEnd()
c.Assert(it.Current(), check.Equals, it.End())
c.Assert(it.Begin(), check.Equals, li.GetRow(ptrs[0]))
it = NewIterator4RowPtr(li, ptrs)
checkIterator(c, it, expected)
it.Begin()
for i := 0; i < 5; i++ {
c.Assert(it.Current(), check.Equals, li.GetRow(ptrs[i]))
it.Next()
}
it.ReachEnd()
c.Assert(it.Current(), check.Equals, it.End())
c.Assert(it.Begin(), check.Equals, li.GetRow(ptrs[0]))
it = NewIterator4RowPtr(li2, ptrs2)
checkIterator(c, it, expected)
it.Begin()
for i := 0; i < 5; i++ {
c.Assert(it.Current(), check.Equals, li2.GetRow(ptrs2[i]))
it.Next()
}
it.ReachEnd()
c.Assert(it.Current(), check.Equals, it.End())
c.Assert(it.Begin(), check.Equals, li2.GetRow(ptrs2[0]))
rc := &RowContainer{}
rc.m.records = li
it = NewIterator4RowContainer(rc)
checkIterator(c, it, expected)
it.Begin()
for i := 0; i < 5; i++ {
c.Assert(it.Current(), check.Equals, li.GetRow(ptrs[i]))
it.Next()
}
it.ReachEnd()
c.Assert(it.Current(), check.Equals, it.End())
c.Assert(it.Begin(), check.Equals, li.GetRow(ptrs[0]))
it = NewIterator4Slice(nil)
c.Assert(it.Begin(), check.Equals, it.End())
it = NewIterator4Chunk(new(Chunk))
c.Assert(it.Begin(), check.Equals, it.End())
it = NewIterator4List(new(List))
c.Assert(it.Begin(), check.Equals, it.End())
it = NewIterator4RowPtr(li, nil)
c.Assert(it.Begin(), check.Equals, it.End())
rc = &RowContainer{}
rc.m.records = NewList(fields, 1, 1)
it = NewIterator4RowContainer(rc)
c.Assert(it.Begin(), check.Equals, it.End())
}
func checkIterator(c *check.C, it Iterator, expected []int64) {
var got []int64
for row := it.Begin(); row != it.End(); row = it.Next() {
got = append(got, row.GetInt64(0))
}
c.Assert(got, check.DeepEquals, expected)
}