@Override
    public boolean isVirtual(MetaField metaField) {
        return true;
    }
Base constructor

@param id The id of node
@param name The name of node
@param fields The field list of node
@param watermarkField The watermark field of node only used for {@link ExtractMode#CDC}
@param properties The properties connect to mysql
@param primaryKey The primark key connect to mysql
@param tableNames The table names connect to mysql
@param hostname The hostname connect to mysql only used for {@link ExtractMode#CDC}
@param username The username connect to mysql
@param password The password connect to mysql
@param database The database connect to mysql only used for {@link ExtractMode#CDC}
@param port The port connect to mysql only used for {@link ExtractMode#CDC}
@param serverId The server id connect to mysql only used for {@link ExtractMode#CDC}
@param incrementalSnapshotEnabled The incremental snapshot enabled connect to mysql
        only used for {@link ExtractMode#CDC}
@param serverTimeZone The server time zone connect to mysql only used for {@link ExtractMode#CDC}
@param extractMode The extract mode connect mysql {@link ExtractMode}
@param url The url connect to mysql only used for {@link ExtractMode#SCAN}
inlong-sort/sort-common/src/main/java/org/apache/inlong/sort/protocol/node/extract/OceanBaseExtractNode.java