[CALCITE-4442] SqlAlter extend not support ALTER TABLE statement

• Type: Wish
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.18.0
• Component/s: core

Environment

calcite 1.18.0

and so does the latest 1.26.0

• Assignee: Unassigned
• Reporter: chener
• Created: 18/Dec/20 03:26
• Updated: 18/Dec/20 05:56

Description

I want to extend the ALTER TABLE statement ,but I find it is impossible to do that unless i change the source code :

 

// parser.jj
/** too long to ignore **/
SqlAlter SqlAlter() :
{
    final Span s;
    final String scope;
    final SqlAlter alterNode;
}
{
    <ALTER> { s = span(); }
    scope = Scope()
/** too long to ignore **/

Here you see the ALTER statement must have a scope SYSTEM or SESSION ,which is confined