Thomas Tauber-Marshall created IMPALA-7832: ----------------------------------------------
Summary: Support IF NOT EXISTS in alter table add columns Key: IMPALA-7832 URL: https://issues.apache.org/jira/browse/IMPALA-7832 Project: IMPALA Issue Type: New Feature Components: Frontend Affects Versions: Impala 3.1.0 Reporter: Thomas Tauber-Marshall alter table <table_name> add [if not exists] columns (<name> <type> [, <name> <type>...]) would add the column only if a column of the same name does not already exist Probably worth checking out what other databases do in different situations, eg. if the column already exists but with a different type, if "replace" is used instead of "add", etc. -- This message was sent by Atlassian JIRA (v7.6.3#76005)