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Lu, Huayi
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Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com> Co-authored-by: Lu, Huayi <luhuayi@huawei.com> Co-committed-by: Lu, Huayi <luhuayi@huawei.com>
47 lines
4.0 KiB
HTML
47 lines
4.0 KiB
HTML
<a name="EN-US_TOPIC_0000001188323612"></a><a name="EN-US_TOPIC_0000001188323612"></a>
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<h1 class="topictitle1">SNAPSHOT</h1>
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<div id="body0000001083281036"><p id="EN-US_TOPIC_0000001188323612__p14025124208"><strong id="EN-US_TOPIC_0000001188323612__b113226452118">SNAPSHOT</strong> records the start and end time of each performance view snapshot creation. After <strong id="EN-US_TOPIC_0000001188323612__b98819131226">enable_wdr_snapshot</strong> is set to <strong id="EN-US_TOPIC_0000001188323612__b128451715027">on</strong>, this catalog is created and maintained by the background snapshot thread. It is accessible only to users with system administrator rights.</p>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001188323612__t852f5029957e402f9410e3863fbc5c95" frame="border" border="1" rules="all"><caption><b>Table 1 </b>dbms_om.snapshot columns</caption><thead align="left"><tr id="EN-US_TOPIC_0000001188323612__r0f01c2a1e8244061a8a38b91596b93db"><th align="left" class="cellrowborder" valign="top" width="25%" id="mcps1.3.2.2.4.1.1"><p id="EN-US_TOPIC_0000001188323612__ae7a56a0db89b4c08b5d8f2493b2c7082">Name</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="25%" id="mcps1.3.2.2.4.1.2"><p id="EN-US_TOPIC_0000001188323612__aaf9ff75163d7447b84cc3135f5f2bad0">Type</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.2.2.4.1.3"><p id="EN-US_TOPIC_0000001188323612__afebc9ab68fee4022b715035b95ad0038">Description</p>
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</th>
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</tr>
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</thead>
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<tbody><tr id="EN-US_TOPIC_0000001188323612__r8c755e2e5e8741f98940c5a7266c1777"><td class="cellrowborder" valign="top" width="25%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001188323612__p41182047162116">snapshot_id</p>
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</td>
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<td class="cellrowborder" valign="top" width="25%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001188323612__p411824732113">name</p>
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</td>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001188323612__p1411874762114">Snapshot ID. This column is the primary key and distribution key.</p>
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</td>
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</tr>
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<tr id="EN-US_TOPIC_0000001188323612__r0e504c0c64cb47f2bad0cc300d95fb5b"><td class="cellrowborder" valign="top" width="25%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001188323612__p8118154702116">start_ts</p>
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</td>
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<td class="cellrowborder" valign="top" width="25%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001188323612__p2011910475217">timestamp with time zone</p>
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</td>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001188323612__p1411912479217">Snapshot start time</p>
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</td>
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</tr>
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<tr id="EN-US_TOPIC_0000001188323612__r8f14bc071c354a24a691b706ba26120b"><td class="cellrowborder" valign="top" width="25%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001188323612__p16119247202117">end_ts</p>
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</td>
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<td class="cellrowborder" valign="top" width="25%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001188323612__p5119647192118">timestamp with time zone</p>
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</td>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001188323612__p111914702116">Snapshot end time</p>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="notice" id="EN-US_TOPIC_0000001188323612__note54971521152413"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><ul id="EN-US_TOPIC_0000001188323612__ul9342826152418"><li id="EN-US_TOPIC_0000001188323612__li8407149236">This system catalog's schema is <strong id="EN-US_TOPIC_0000001188323612__b1648303115610">dbms_om</strong>.</li><li id="EN-US_TOPIC_0000001188323612__li43428264249">Do not modify or delete this catalog externally. Otherwise, functions related to view snapshots may not work properly.</li></ul>
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</div></div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_04_0561.html">System Catalogs</a></div>
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</div>
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</div>
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