mirror of https://gitee.com/bigwinds/arangodb
36 lines
2.7 KiB
Plaintext
36 lines
2.7 KiB
Plaintext
arangosh> db.ids.ensureIndex({ <span class="hljs-attr">type</span>: <span class="hljs-string">"persistent"</span>, <span class="hljs-attr">fields</span>: [ <span class="hljs-string">"myId"</span> ], <span class="hljs-attr">unique</span>: <span class="hljs-literal">true</span> });
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{
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<span class="hljs-string">"deduplicate"</span> : <span class="hljs-literal">true</span>,
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<span class="hljs-string">"fields"</span> : [
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<span class="hljs-string">"myId"</span>
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],
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<span class="hljs-string">"id"</span> : <span class="hljs-string">"ids/74816"</span>,
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<span class="hljs-string">"isNewlyCreated"</span> : <span class="hljs-literal">true</span>,
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<span class="hljs-string">"name"</span> : <span class="hljs-string">"idx_1646382081992818690"</span>,
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<span class="hljs-string">"selectivityEstimate"</span> : <span class="hljs-number">1</span>,
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<span class="hljs-string">"sparse"</span> : <span class="hljs-literal">false</span>,
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<span class="hljs-string">"type"</span> : <span class="hljs-string">"persistent"</span>,
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<span class="hljs-string">"unique"</span> : <span class="hljs-literal">true</span>,
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<span class="hljs-string">"code"</span> : <span class="hljs-number">201</span>
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}
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arangosh> db.ids.save({ <span class="hljs-string">"myId"</span>: <span class="hljs-number">123</span> });
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{
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<span class="hljs-string">"_id"</span> : <span class="hljs-string">"ids/74820"</span>,
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<span class="hljs-string">"_key"</span> : <span class="hljs-string">"74820"</span>,
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<span class="hljs-string">"_rev"</span> : <span class="hljs-string">"_ZXF6dXy---"</span>
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}
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arangosh> db.ids.save({ <span class="hljs-string">"myId"</span>: <span class="hljs-number">456</span> });
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{
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<span class="hljs-string">"_id"</span> : <span class="hljs-string">"ids/74822"</span>,
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<span class="hljs-string">"_key"</span> : <span class="hljs-string">"74822"</span>,
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<span class="hljs-string">"_rev"</span> : <span class="hljs-string">"_ZXF6dXy--A"</span>
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}
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arangosh> db.ids.save({ <span class="hljs-string">"myId"</span>: <span class="hljs-number">789</span> });
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{
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<span class="hljs-string">"_id"</span> : <span class="hljs-string">"ids/74824"</span>,
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<span class="hljs-string">"_key"</span> : <span class="hljs-string">"74824"</span>,
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<span class="hljs-string">"_rev"</span> : <span class="hljs-string">"_ZXF6dXy--C"</span>
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}
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arangosh> db.ids.save({ <span class="hljs-string">"myId"</span>: <span class="hljs-number">123</span> });
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[ArangoError <span class="hljs-number">1210</span>: unique constraint violated - <span class="hljs-keyword">in</span> index idx_1646382081992818690 <span class="hljs-keyword">of</span> type persistent over <span class="hljs-string">'myId'</span>; conflicting key: <span class="hljs-number">74820</span>]
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