Ubuntu switching input method

Sogou Input, which is installed in the newly installed system Ubuntu 18, has a keypad in the upper right corner, but what is next to it? how can it not be displayed?

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Mar.23,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e510ca-43e37.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e510ca-43e37.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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