Jaanai Zhang created PHOENIX-4815:
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Summary: 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
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 reference
{code:java}
alter table
table_name
modify
column_name datatype;
{code}
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