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Jaanai Zhang commented on PHOENIX-4815: --------------------------------------- [~jamestaylor] Can u please review? thx > support alter table modify column > ---------------------------------- > > Key: PHOENIX-4815 > URL: https://issues.apache.org/jira/browse/PHOENIX-4815 > Project: Phoenix > Issue Type: Improvement > Reporter: Jaanai Zhang > Priority: Major > Attachments: PHOENIX-4815.patch > > > if we want to change max length or scale of fields of variable length type( > example for :varchar, char and decimal type etc), we can not drop column to > recreate new column when the table has massive data, which may affects > online service,meanwhile, it is also very expensive. so sometimes this > function is very useful. > Taking ORACLE dialect as an reference > {code:java} > alter table > table_name > modify > column_name datatype; > {code} > reference link: > https://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_3001.htm#i2103956 -- This message was sent by Atlassian JIRA (v7.6.3#76005)