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From "Jaanai Zhang (JIRA)" <>
Subject [jira] [Created] (PHOENIX-4815) support alter table modify column
Date Mon, 16 Jul 2018 12:01:00 GMT
Jaanai Zhang created PHOENIX-4815:

             Summary: support alter table modify column 
                 Key: PHOENIX-4815
             Project: Phoenix
          Issue Type: Improvement
            Reporter: Jaanai Zhang

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´╝îmeanwhile, it is also very
expensive. so sometimes this function is very useful.

Taking ORACLE dialect as reference 

alter table
   column_name  datatype;

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