nl_tokens: Execute the CREATE PROPERTY .
pl_tokens: public Object execute ( final Map < Object , Object > iArgs ) { if ( type == null ) throw new OCommandExecutionException ( "Cannot execute the command because it has not been parsed yet" ) ; final ODatabaseDocument database = getDatabase ( ) ; final OClassEmbedded sourceClass = ( OClassEmbedded ) database . getMetadata ( ) . getSchema ( ) . getClass ( className ) ; if ( sourceClass == null ) throw new OCommandExecutionException ( "Source class '" + className + "' not found" ) ; OPropertyImpl prop = ( OPropertyImpl ) sourceClass . getProperty ( fieldName ) ; if ( prop != null ) { if ( ifNotExists ) { return sourceClass . properties ( ) . size ( ) ; } throw new OCommandExecutionException ( "Property '" + className + "." + fieldName + "' already exists. Remove it before to retry." ) ; } // CREATE THE PROPERTY
   OClass linkedClass = null ; OType linkedType = null ; if ( linked != null ) { // FIRST SEARCH BETWEEN CLASSES
   linkedClass = database . getMetadata ( ) . getSchema ( ) . getClass ( linked ) ; if ( linkedClass == null ) // NOT FOUND: SEARCH BETWEEN TYPES
   linkedType = OType . valueOf ( linked . toUpperCase ( Locale . ENGLISH ) ) ; } // CREATE IT LOCALLY
   OPropertyImpl internalProp = sourceClass . addPropertyInternal ( fieldName , type , linkedType , linkedClass , unsafe ) ; if ( readonly ) { internalProp . setReadonly ( true ) ; } if ( mandatory ) { internalProp . setMandatory ( true ) ; } if ( notnull ) { internalProp . setNotNull ( true ) ; } if ( <mask> != null ) { internalProp . setMax ( max ) ; } if ( min != null ) { internalProp . setMin ( min ) ; } if ( defaultValue != null ) { internalProp . setDefaultValue ( defaultValue ) ; } return sourceClass . properties ( ) . size ( ) ; }