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Ning Sun authored
Add NX, XX, GT, and LT flags to EXPIRE, PEXPIRE, EXPIREAT, PEXAPIREAT. - NX - only modify the TTL if no TTL is currently set - XX - only modify the TTL if there is a TTL currently set - GT - only increase the TTL (considering non-volatile keys as infinite expire time) - LT - only decrease the TTL (considering non-volatile keys as infinite expire time) return value of the command is 0 when the operation was skipped due to one of these flags. Signed-off-by:
Ning Sun <sunng@protonmail.com>
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