Java Code Examples for org.elasticsearch.search.aggregations.AggregationBuilders#max()

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Example 1

Source File: GroupParser.java From sql4es with Apache License 2.0

5 votes

/**
 * Adds a set of 'leaf aggregations' to the provided parent metric (i.e. count, sum, max etc)
 * @param parentAgg
 * @param heading
 * @param addCount
 */
@SuppressWarnings("rawtypes")
private void addMetrics(AggregationBuilder parentAgg, Heading heading, boolean addCount){
	for(Column metric : heading.columns()){
		AggregationBuilder agg = null;
	    if(metric.getOp() == Operation.AVG) {
               agg = AggregationBuilders.avg(metric.getAggName());
           } else if(addCount && metric.getOp() == Operation.COUNT) {
               agg = AggregationBuilders.count(metric.getAggName());
           } else if(metric.getOp() == Operation.MAX) {
               agg = AggregationBuilders.max(metric.getAggName());
           } else if(metric.getOp() == Operation.MIN) {
               agg = AggregationBuilders.min(metric.getAggName());
           } else if(metric.getOp() == Operation.SUM) {
               agg = AggregationBuilders.sum(metric.getAggName());
           }
		if (agg != null) {
	        String col = metric.getColumn();
	        // * or number
	        if ("*".equals(col) || col.matches("-?\\d+")) {
                   agg = ((ValuesSourceAggregationBuilder.LeafOnly)agg).script(new Script("1"));
               } else if (col.startsWith("script:")) {
                   agg = ((ValuesSourceAggregationBuilder.LeafOnly)agg).script(new Script(col.replaceAll("script:","")));
               } else {
                   agg = ((ValuesSourceAggregationBuilder.LeafOnly) agg).field(metric.getColumn());
               }
               parentAgg.subAggregation(agg);
           }
	}
}

Example 2

Source File: AggMaker.java From elasticsearch-sql with Apache License 2.0

4 votes

/**
 * Create aggregation according to the SQL function.
 * zhongshu-comment 根据sql中的函数来生成一些agg，例如sql中的count()、sum()函数，这是agg链中最里边的那个agg了，eg：
 *                  select a,b,count(c),sum(d) from tbl group by a,b
 * @param field  SQL function
 * @param parent parentAggregation
 * @return AggregationBuilder represents the SQL function
 * @throws SqlParseException in case of unrecognized function
 */
public AggregationBuilder makeFieldAgg(MethodField field, AggregationBuilder parent) throws SqlParseException {
    //question 加到groupMap里是为了什么
    groupMap.put(field.getAlias(), new KVValue("FIELD", parent));

    ValuesSourceAggregationBuilder builder;
    field.setAlias(fixAlias(field.getAlias()));
    switch (field.getName().toUpperCase()) {
        case "SUM":
            builder = AggregationBuilders.sum(field.getAlias());
            return addFieldToAgg(field, builder);
        case "MAX":
            builder = AggregationBuilders.max(field.getAlias());
            return addFieldToAgg(field, builder);
        case "MIN":
            builder = AggregationBuilders.min(field.getAlias());
            return addFieldToAgg(field, builder);
        case "AVG":
            builder = AggregationBuilders.avg(field.getAlias());
            return addFieldToAgg(field, builder);
        case "STATS":
            builder = AggregationBuilders.stats(field.getAlias());
            return addFieldToAgg(field, builder);
        case "EXTENDED_STATS":
            builder = AggregationBuilders.extendedStats(field.getAlias());
            return addFieldToAgg(field, builder);
        case "PERCENTILES":
            builder = AggregationBuilders.percentiles(field.getAlias());
            addSpecificPercentiles((PercentilesAggregationBuilder) builder, field.getParams());
            return addFieldToAgg(field, builder);
        case "PERCENTILE_RANKS":
            double[] rankVals = getSpecificPercentileRankVals(field.getParams());
            builder = AggregationBuilders.percentileRanks(field.getAlias(), rankVals);
            return addFieldToAgg(field, builder);
        case "TOPHITS":
            return makeTopHitsAgg(field);
        case "SCRIPTED_METRIC":
            return scriptedMetric(field);
        case "COUNT":
            groupMap.put(field.getAlias(), new KVValue("COUNT", parent));
            return addFieldToAgg(field, makeCountAgg(field));
        default:
            throw new SqlParseException("the agg function not to define !");
    }
}