question: protected StringBuffer constructStatement ( RowChangeData . ActionType action , String schemaName , String tableName , ArrayList < OneRowChange . ColumnSpec > columns , ArrayList < OneRowChange . ColumnSpec > keys , ArrayList < OneRowChange . ColumnVal > keyValues , ArrayList < OneRowChange . ColumnVal > colValues ) { StringBuffer stmt = new StringBuffer ( ) ; if ( action == RowChangeData . ActionType . INSERT ) { stmt . append ( "INSERT INTO " ) ; stmt . append ( conn . getDatabaseObjectName ( schemaName ) + "." + conn . getDatabaseObjectName ( tableName ) ) ; stmt . append ( " ( " ) ; printColumnSpec ( stmt , columns , null , colValues , PrintMode . NAMES_ONLY , " , " ) ; stmt . append ( " ) " ) ; stmt . append ( " VALUES ( " ) ; printColumnSpec ( stmt , columns , null , colValues , PrintMode . PLACE_HOLDER , " , " ) ; stmt . append ( " ) " ) ; } else if ( action == RowChangeData . ActionType . UPDATE ) { stmt . append ( "UPDATE " ) ; stmt . append ( conn . getDatabaseObjectName ( schemaName ) + "." + conn . getDatabaseObjectName ( tableName ) ) ; stmt . append ( " SET " ) ; printColumnSpec ( stmt , columns , null , colValues , PrintMode . ASSIGNMENT , " , " ) ; stmt . append ( " WHERE " ) ; printColumnSpec ( stmt , keys , keyValues , colValues , PrintMode . ASSIGNMENT , " AND " ) ; } else if ( action == RowChangeData . ActionType . DELETE ) { stmt . append ( "DELETE FROM " ) ; stmt . append ( conn . getDatabaseObjectName ( schemaName ) + "." + conn . getDatabaseObjectName ( tableName ) ) ; stmt . append ( " WHERE " ) ; printColumnSpec ( stmt , keys , keyValues , colValues , PrintMode . ASSIGNMENT , " AND " ) ; } return stmt ; }
target:  Constructs a SQL statement template later used for prepared statement.