Is there a limit on the number of characters in the IOS scan QR code?

Special characters are restricted
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Objective-c swift javascript
Apr.16,2021

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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-64f5-1b399bd-2b9f4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b399bd-2b9f4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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