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>
63 lines
3.2 KiB
HTML
63 lines
3.2 KiB
HTML
<a name="EN-US_TOPIC_0000001772696188"></a><a name="EN-US_TOPIC_0000001772696188"></a>
|
|
|
|
<h1 class="topictitle1">LOCK</h1>
|
|
<div id="body8662426"><p id="EN-US_TOPIC_0000001772696188__en-us_topic_0000001658024882_en-us_topic_0000001385456454_en-us_topic_0214164681_p102116541238">GaussDB(DWS) does not support the <strong id="EN-US_TOPIC_0000001772696188__en-us_topic_0000001658024882_en-us_topic_0000001385456454_b10663243393196">ALTER TABLE </strong><em id="EN-US_TOPIC_0000001772696188__en-us_topic_0000001658024882_en-us_topic_0000001385456454_i10087385453196">tbName </em><strong id="EN-US_TOPIC_0000001772696188__en-us_topic_0000001658024882_en-us_topic_0000001385456454_b16903542313196">LOCK</strong> statement of MySQL, which will be deleted by DSC during migration.</p>
|
|
<p id="EN-US_TOPIC_0000001772696188__en-us_topic_0000001658024882_en-us_topic_0000001385456454_en-us_topic_0214164681_p896271452516"><strong id="EN-US_TOPIC_0000001772696188__en-us_topic_0000001658024882_en-us_topic_0000001385456454_en-us_topic_0214164681_b3964329102518">Input</strong></p>
|
|
<pre class="screen" id="EN-US_TOPIC_0000001772696188__en-us_topic_0000001658024882_en-us_topic_0000001385456454_en-us_topic_0214164681_screen267624012514">CREATE TABLE IF NOT EXISTS `runoob_alter_test`(
|
|
`dataType1` int NOT NULL AUTO_INCREMENT,
|
|
`dataType2` FLOAT(10),
|
|
`dataType4` TEXT NOT NULL,
|
|
`dataType5` YEAR NOT NULL DEFAULT '2018',
|
|
`dataType6` DATETIME NOT NULL,
|
|
`dataType7` CHAR NOT NULL DEFAULT '',
|
|
`dataType8` VARCHAR(50),
|
|
`dataType9` VARCHAR(50) NOT NULL DEFAULT '',
|
|
`dataType10` TIME NOT NULL DEFAULT '10:20:59',
|
|
PRIMARY KEY(`dataType1`)
|
|
)ENGINE=InnoDB DEFAULT CHARSET=utf8;
|
|
|
|
## A.
|
|
ALTER TABLE runoob_alter_test LOCK DEFAULT;
|
|
|
|
## B.
|
|
ALTER TABLE runoob_alter_test LOCK=DEFAULT;
|
|
|
|
## C.
|
|
ALTER TABLE runoob_alter_test LOCK EXCLUSIVE;
|
|
|
|
## D.
|
|
ALTER TABLE runoob_alter_test LOCK=EXCLUSIVE;</pre>
|
|
<p id="EN-US_TOPIC_0000001772696188__en-us_topic_0000001658024882_en-us_topic_0000001385456454_en-us_topic_0214164681_p10469192052519"><strong id="EN-US_TOPIC_0000001772696188__en-us_topic_0000001658024882_en-us_topic_0000001385456454_en-us_topic_0214164681_b920583352516">Output</strong></p>
|
|
<pre class="screen" id="EN-US_TOPIC_0000001772696188__en-us_topic_0000001658024882_en-us_topic_0000001385456454_en-us_topic_0214164681_screen12559134312512">CREATE TABLE IF NOT EXISTS "public"."runoob_alter_test"
|
|
(
|
|
"datatype1" SERIAL NOT NULL,
|
|
"datatype2" REAL,
|
|
"datatype4" TEXT NOT NULL,
|
|
"datatype5" SMALLINT NOT NULL DEFAULT '2018',
|
|
"datatype6" TIMESTAMP WITHOUT TIME ZONE NOT NULL,
|
|
"datatype7" CHAR(4) NOT NULL DEFAULT '',
|
|
"datatype8" VARCHAR(200),
|
|
"datatype9" VARCHAR(200) NOT NULL DEFAULT '',
|
|
"datatype10" TIME WITHOUT TIME ZONE NOT NULL DEFAULT '10:20:59',
|
|
PRIMARY KEY ("datatype1")
|
|
)
|
|
WITH ( ORIENTATION = ROW, COMPRESSION = NO )
|
|
NOCOMPRESS
|
|
DISTRIBUTE BY HASH ("datatype1");
|
|
|
|
-- A.
|
|
|
|
-- B.
|
|
|
|
-- C.
|
|
|
|
-- D.</pre>
|
|
<p id="EN-US_TOPIC_0000001772696188__en-us_topic_0000001658024882_en-us_topic_0000001385456454_en-us_topic_0214164681_p8060118"></p>
|
|
</div>
|
|
<div>
|
|
<div class="familylinks">
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_16_0119.html">Table (Optional Parameters and Operations)</a></div>
|
|
</div>
|
|
</div>
|
|
|