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Jogesh Anand commented on CASSANDRA-16916: ------------------------------------------ [~subkanthi], [~blerer] - Hey folks, sorry for the delay in getting to it ( was caught up with office work a bit). Yeah I'm working on it and will get the initial set out in a week or two. Appreciate the patience on this ticket. Will get back on this. > Add support for IF EXISTS and IF NOT EXISTS in ALTER statements > --------------------------------------------------------------- > > Key: CASSANDRA-16916 > URL: https://issues.apache.org/jira/browse/CASSANDRA-16916 > Project: Cassandra > Issue Type: Improvement > Components: CQL/Syntax > Reporter: Benjamin Lerer > Assignee: Jogesh Anand > Priority: Normal > > It would make sense to add support for {{IF EXISTS}} and {{IF NOT EXISTS}} in > the different {{ALTER}} statements. > For example: > * {{ALTER TABLE IF EXISTS myTable ...}} > * {{ALTER TABLE myTable ADD IF NOT EXISTS ...}} > * {{ALTER TABLE myTable DROP IF EXISTS ...}} > * {{ALTER TYPE IF EXISTS myType ...}} > * {{ALTER TYPE myType ADD IF NOT EXISTS ...}} > +Additional info for newcomers:+ > In order to implement this change you will need to change the {{Parser.g}} > ANTLR file located in the src/antlr directory and the java classes > corresponding to the different alter statements located in the > {{org.apache.cassandra.cql3.statements.schema}} package. You can look at the > CreateTableStatement class to see how it was done there. > The unit test for the CQL logic are located under > {{org.apache.cassandra.cql3.validation}} -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org