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&nbffmp;or:poi#"lass="nbw-tcd boxo :lffffffffm/d=":lefffffff:lffffffffmd="bpan>文章分类m/d=":lefffffffffffmul<:lfffffffffffffffffffft;c>·assm/" 监控(1)as网·assm/" nofos(3)as网·assm/" Ubay:u(25)as网·assm/" C语言(4)as网·assm/" GreenPlumn(5)as网·assm/" MySQL(32)as网·assm/" Pdetgres-XC(7)as网·assm/" PG大会/活动(20)as网·assm/" 更多 >las网mp;o :lffffffffffff:lfffffffffffftd="bpan>八招诀窍,教你实力撩妹 >las网:lffffffffffff:lffffffffm/d=":lefffffffmd="brel=r_mkaolaadvedpan>.163考拉推荐m/d=":leffffffffffft_13664 idth:="on:m feox{b="o75m 2c2c2;:10px;="0" 2c2c2;idth:="0" blicAmiddle="0" scrarl.ngearf" middle="0" o/powommeneigencyoghome& h;_f"tp://blo;}.m-3 ./r?0 ne=36teas" hf}.jineala no&cat=det63l&tstylkl_a40x275& ncoloon=>:lffffffffffff:lffffffffm/d=":lefffffff:lffffffffmd="brel=r_ma ft:0edpan>&nbffmp;or:poi#"lass="nbw-tcd boxo :lffffffffm/d=":lefffffff:lffffffffmd="brel=r_overbnewssWnb-p pan>PdetgreSQL9.6:新增 a nom 索引类型支持任意列组合查询assm/" pan clpan clsp;urlpan>ar-6-06-11 19:39:53assm/" |pan clpan cl分类:assm/" :l ffffffffffta pan>Pdetgres基础as网:l ffffffffffmp;urlpan>|pan clpan cl标签:assm/" mp;urlpan>|assm/" 举报assm/" |assm/" assm/" 大assm/" 中assm/" 小assm/" assm/" ap;urlpan>/h:112 fcbko0 1s]-pan cli/p;ur>:lffffffffffffffffwrapwb fcbko0 1s]-pan cli/p;ur>:lffffffffffffffffqqz ne fcbko0 1s]-pan cli/p;ur>:lffffffffffffffffqqweibo fcbko0 1s]-pan cli/p;ur>:lffffffffffffffffweixin fcbko0 1s]-:lmd="bpan>:lffff用微信pan clpan cl“扫一扫”

将文章分享到朋友圈。

yixin fcbko0 1s]-:lmd="bpan>:lffff用易信pan clpan cl“扫一扫”

将文章分享到朋友圈。

edirect.html?frompfr:poitp://blog.1ewtmplrel="app?y:i=qbbkrzydb_ar-50408_01"-pan clpan cl下载LOFTERas网:lffffffffffffff
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9.6 版本开始支持 a nom 索引,这时只需要创建一个索引就可以了,接着测试。a/d="

/hops=1)

备注:根据 i1,i2 字段查询,执行时间需要 52 ms 左右,速度有些慢。pan cla/d="

/hops=1)

备注:根据 i3,i5 字段查询,执行时间需要 44 ms 左右,速度依然有些慢。a/d=" a/d="

备注:在 i3,i5 列上创建 btree 组合索引,执行时间只需 0.078>ms ,从以上测试来看 a nom 索引的查询速度比 btree 慢很多。a/d=" --参考asb>
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将文章分享到朋友圈。

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