forked from docs/doc-exports
Lu, Huayi
27019c2991
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com> 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>
33 lines
2.2 KiB
HTML
33 lines
2.2 KiB
HTML
<a name="EN-US_TOPIC_0000001772536520"></a><a name="EN-US_TOPIC_0000001772536520"></a>
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<h1 class="topictitle1">STATS_SAMPLE_PAGES</h1>
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<div id="body8662426"><p id="EN-US_TOPIC_0000001772536520__en-us_topic_0000001706224149_en-us_topic_0000001385296898_p16888958111719"><strong id="EN-US_TOPIC_0000001772536520__en-us_topic_0000001706224149_en-us_topic_0000001385296898_b110256120631855">STATS_SAMPLE_PAGES</strong> specifies the number of index pages to sample when cardinality and other statistics for an indexed column are estimated. DSC will delete this attribute during migration.</p>
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<p id="EN-US_TOPIC_0000001772536520__en-us_topic_0000001706224149_en-us_topic_0000001385296898_en-us_topic_0214164636_p20279151915518"><strong id="EN-US_TOPIC_0000001772536520__en-us_topic_0000001706224149_en-us_topic_0000001385296898_en-us_topic_0214164636_b387572005617">Input</strong></p>
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<pre class="screen" id="EN-US_TOPIC_0000001772536520__en-us_topic_0000001706224149_en-us_topic_0000001385296898_en-us_topic_0214164636_screen66474452410">CREATE TABLE `public`.`runoob_alter_test`(
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`dataType1` int NOT NULL AUTO_INCREMENT,
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`dataType2` DOUBLE(20,8),
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`dataType3` TEXT NOT NULL,
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PRIMARY KEY(`dataType1`)
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) ENGINE=InnoDB,STATS_SAMPLE_PAGES=25;
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ALTER TABLE runoob_alter_test STATS_SAMPLE_PAGES 100;
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ALTER TABLE runoob_alter_test STATS_SAMPLE_PAGES=100;</pre>
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<p id="EN-US_TOPIC_0000001772536520__en-us_topic_0000001706224149_en-us_topic_0000001385296898_en-us_topic_0214164636_p12114173518210"><strong id="EN-US_TOPIC_0000001772536520__en-us_topic_0000001706224149_en-us_topic_0000001385296898_en-us_topic_0214164636_b75709255564">Output</strong></p>
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<pre class="screen" id="EN-US_TOPIC_0000001772536520__en-us_topic_0000001706224149_en-us_topic_0000001385296898_en-us_topic_0214164636_screen1360576145519">CREATE TABLE "public"."runoob_alter_test"
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(
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"datatype1" SERIAL NOT NULL,
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"datatype2" DOUBLE PRECISION,
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"datatype3" TEXT NOT NULL,
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PRIMARY KEY ("datatype1")
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)
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WITH ( ORIENTATION = ROW, COMPRESSION = NO )
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NOCOMPRESS
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DISTRIBUTE BY HASH ("datatype1");</pre>
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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_16_0119.html">Table (Optional Parameters and Operations)</a></div>
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</div>
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</div>
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