1 CALL
2? 
2 BrokerSchemaName .
3 RoutineName  ( ParameterList )
4? Qualifiers
5? INTO target

BrokerSchemaName

1+ .
1 Identifier

ParameterList

1+ ,
1 Expression

Qualifiers

1 IN DatabaseSchemaReference
1 EXTERNAL SCHEMA DatabaseSchemaName

DatabaseSchemaReference

1 Database
2? . DatabaseSourceClause
3 . SchemaClause

DatabaseSourceClause

1 DatabaseSourceName
1 { DatabaseSourceExpr }

SchemaClause

1 SchemaName
1 { SchemaExpr }