This is identical to what we saw above with autotrace, except we get to see that partition pruning did actually take place.
除
真实的看到
区截断的确
，这与我们在上面用AUTOTRACE的结
一致。
This is identical to what we saw above with autotrace, except we get to see that partition pruning did actually take place.
除真实的看到区截断的确，这与我们在上面用AUTOTRACE的结一致。
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