alter_zone_index_stmt ::=
	'ALTER' 'INDEX' table_name '@' index_name 'CONFIGURE' 'ZONE' 'USING' variable '=' 'COPY' 'FROM' 'PARENT' ( ( ',' variable '=' value | ',' variable '=' 'COPY' 'FROM' 'PARENT' ) )*
	| 'ALTER' 'INDEX' table_name '@' index_name 'CONFIGURE' 'ZONE' 'USING' variable '=' value ( ( ',' variable '=' value | ',' variable '=' 'COPY' 'FROM' 'PARENT' ) )*
	| 'ALTER' 'INDEX' table_name '@' index_name 'CONFIGURE' 'ZONE' 'DISCARD'
	| 'ALTER' 'INDEX' index_name 'CONFIGURE' 'ZONE' 'USING' variable '=' 'COPY' 'FROM' 'PARENT' ( ( ',' variable '=' value | ',' variable '=' 'COPY' 'FROM' 'PARENT' ) )*
	| 'ALTER' 'INDEX' index_name 'CONFIGURE' 'ZONE' 'USING' variable '=' value ( ( ',' variable '=' value | ',' variable '=' 'COPY' 'FROM' 'PARENT' ) )*
	| 'ALTER' 'INDEX' index_name 'CONFIGURE' 'ZONE' 'DISCARD'
