src/main/java/com/aliyun/openservices/paifeaturestore/dao/FeatureViewIgraphDao.java [133:148]:
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        return  featureResult;
    }

    /* Gets a result set of serialized feature fields based on keys.
     *  @Param keys(@code String array)
     * @Param userIdFields(@code String array)
     * @Param config,this class contains the feature view serialization feature configuration information.
     * @return FeatureResult*/
    @Override
    public FeatureResult getSequenceFeatures(String[] keys, String userIdField, FeatureViewSeqConfig config) {
        FeatureStoreResult featureStoreResult = new FeatureStoreResult();
        String[] selectFields=null;
        if (!StringUtils.isEmpty(config.getPlayTimeField())) {
            selectFields=new String[]{config.getItemIdField(),config.getEventField(),config.getPlayTimeField(),config.getTimestampField()};
        } else {
            selectFields=new String[]{config.getItemIdField(),config.getEventField(),config.getTimestampField()};
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src/main/java/com/aliyun/openservices/paifeaturestore/dao/FeatureViewTableStoreDao.java [169:180]:
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        return featureResult;
    }

    @Override
    public FeatureResult getSequenceFeatures(String[] keys, String userIdField, FeatureViewSeqConfig config) {
        FeatureStoreResult featureStoreResult = new FeatureStoreResult();

        String[] selectFields=null;
        if (!StringUtils.isEmpty(config.getPlayTimeField())) {
            selectFields=new String[]{config.getItemIdField(),config.getEventField(),config.getPlayTimeField(),config.getTimestampField()};
        } else {
            selectFields=new String[]{config.getItemIdField(),config.getEventField(),config.getTimestampField()};
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