elasticsearch scripting: how to access other buckets in histogram -

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using elasticsearch 2.3.3

i have date_histogram , inside bucket_script. in script, want use aggregations on current bucket (no problem there) aggregation on previous bucket. did not see way access other buckets inside script.

am missing or not possible?

here query:

curl -xpost "http://$eshost:$esport/$index_name/_search?pretty" -d ' {     "size": 0,      "aggs" : {         "s_price" : {             "date_histogram" : {                 "field" : "a_date",                 "interval" : "month",                 "format" : "yyyy-mm"             },             "aggs" : {                 "median_price": { "percentiles": { "field": "s_price", "percents": [50] } },                 "median_price_change": { "derivative": { "buckets_path": "median_price.50" }},                 "median_percent_change": {                     "bucket_script": {                         "gap_policy" : "insert_zeros",                         "buckets_path": {                           "price_change": "median_price_change",                           "price_abs": "median_price.50"                         },                         "script": "price_change / price_abs * 100"                     }                 }             }         }     } }'

instead of price_abs pointing current bucket value, point previous bucket value.

thanks


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