box.space.test.index.secondary:select({1,'RU', 2})
---
- - [47, 6, 1, 'RU', 2, 11, 6]
- [44, 3, 1, 'RU', 2, 101, 6]
- [42, 1, 1, 'RU', 2, 189, 6]
- [34, 3, 1, 'RU', 2, 260, 5]
- [49, 8, 1, 'RU', 2, 290, 6]
- [41, 0, 1, 'RU', 2, 303, 6]
- [37, 6, 1, 'RU', 2, 494, 5]
- [35, 4, 1, 'RU', 2, 633, 5]
- [45, 4, 1, 'RU', 2, 694, 6]
- [43, 2, 1, 'RU', 2, 780, 6]
- [46, 5, 1, 'RU', 2, 833, 6]
- [40, 9, 1, 'RU', 2, 870, 5]
- [48, 7, 1, 'RU', 2, 927, 6]
- [50, 9, 1, 'RU', 2, 930, 6]
...
box.space.test.index.secondary
---
- unique: false
parts:
- type: NUM
fieldno: 3
- type: STR
fieldno: 4
- type: NUM
fieldno: 5
- type: NUM
fieldno: 6
id: 2
space_id: 512
name: secondary
type: TREE
...
local r='' for k,tuple in box.space.test.index.secondary:pairs({1, 'RU', 2}) do r=r..', found ('..tuple[1]. .')' if (tuple[7]<6) then r = r ..', delete(' ..tuple[1] .. ')' box.space.test:delete(tuple[1]) end end返回 r
---
- ', found (47), found (44), found (42), found (34), delete(34), found (41), found(37), delete(37), found (45), found (43), found (46), found (40), delete(40), found(50)'
...
box.space.test.index.secondary:select({1,'RU', 2})
---
- - [47, 6, 1, 'RU', 2, 11, 6]
- [44, 3, 1, 'RU', 2, 101, 6]
- [42, 1, 1, 'RU', 2, 189, 6]
- [49, 8, 1, 'RU', 2, 290, 6]
- [41, 0, 1, 'RU', 2, 303, 6]
- [35, 4, 1, 'RU', 2, 633, 5]
- [45, 4, 1, 'RU', 2, 694, 6]
- [43, 2, 1, 'RU', 2, 780, 6]
- [46, 5, 1, 'RU', 2, 833, 6]
- [48, 7, 1, 'RU', 2, 927, 6]
- [50, 9, 1, 'RU', 2, 930, 6]
...
local r='' for k,tuple in box.space.test.index.secondary:pairs({1, 'RU', 2}) do r=r..', found ('..tuple[1]. .')' if (tuple[7]<6) then r = r ..', delete(' ..tuple[1] .. ')' box.space.test:delete(tuple[1]) end end返回 r
---
- ', found (47), found (44), found (42), found (49), found (41), found (35), delete(35), found (43), found (46), found (48), found (50)'
...
box.space.test.index.secondary:select({1,'RU', 2})
---
- - [47, 6, 1, 'RU', 2, 11, 6]
- [44, 3, 1, 'RU', 2, 101, 6]
- [42, 1, 1, 'RU', 2, 189, 6]
- [49, 8, 1, 'RU', 2, 290, 6]
- [41, 0, 1, 'RU', 2, 303, 6]
- [45, 4, 1, 'RU', 2, 694, 6]
- [43, 2, 1, 'RU', 2, 780, 6]
- [46, 5, 1, 'RU', 2, 833, 6]
- [48, 7, 1, 'RU', 2, 927, 6]
- [50, 9, 1, 'RU', 2, 930, 6]
...
正如我所见 :pairs 在第一次运行时看不到 35 个元组，并且仅在第二次执行时才看到。为什么？
ps：抱歉解释太长了...