• MASTER_SSL_VERIFY_SERVER_CERT  (R) 

• MASTER_TLS_CIPHERSUITES ; added in 8.0.19 (nonreserved) 

• MASTER_TLS_VERSION 

• MASTER_USER 

• MASTER_ZSTD_COMPRESSION_LEVEL ; added in 8.0.18 (nonreserved) 

• MATCH  (R) 

• MAXVALUE  (R) 

• MAX_CONNECTIONS_PER_HOUR 

• MAX_QUERIES_PER_HOUR 

• MAX_ROWS 

• MAX_SIZE 

• MAX_UPDATES_PER_HOUR 

• MAX_USER_CONNECTIONS 

• MEDIUM 

• MEDIUMBLOB  (R) 

• MEDIUMINT  (R) 

• MEDIUMTEXT  (R) 

• MEMBER ; added in 8.0.17 (reserved); became nonreserved in 8.0.19 

• MEMORY 

• MERGE 

• MESSAGE_TEXT 

• MICROSECOND 

• MIDDLEINT  (R) 

• MIGRATE 

• MINUTE 

• MINUTE_MICROSECOND  (R) 

• MINUTE_SECOND  (R) 

• MIN_ROWS 

• MOD  (R) 

• MODE 

