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August 29, 2015 14:13
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Example of reverse_nested aggregation, a way to count parent docs at a nested level. This maybe a solution to the 'jumpy number' issue in consequence type etc facets.
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| curl -XGET "http://192.170.232.56:8200/gdc_v12/participant-centric/_search?pretty=1" -d ' | |
| { | |
| "aggs":{ | |
| "project":{ | |
| "terms":{ | |
| "field":"admin.disease_code", | |
| "size":1000 | |
| }, | |
| "aggs":{ | |
| "file_size":{ | |
| "nested":{ | |
| "path":"files" | |
| }, | |
| "aggs":{ | |
| "file_size_sum":{ | |
| "sum":{ | |
| "field":"files.file_size" | |
| } | |
| } | |
| } | |
| }, | |
| "files-data_type":{ | |
| "nested":{ | |
| "path":"files" | |
| }, | |
| "aggs":{ | |
| "data_type":{ | |
| "terms":{ | |
| "field":"files.data_type", | |
| "size":10000 | |
| }, | |
| "aggs":{ | |
| "participants":{ | |
| "reverse_nested":{} | |
| } | |
| } | |
| } | |
| } | |
| }, | |
| "files-experimental_strategy":{ | |
| "nested":{ | |
| "path":"files" | |
| }, | |
| "aggs":{ | |
| "experimental_strategy":{ | |
| "terms":{ | |
| "field":"files.experimental_strategy", | |
| "size":10000 | |
| }, | |
| "aggs":{ | |
| "participants":{ | |
| "reverse_nested":{}, | |
| "aggs":{ | |
| "top_participants":{ | |
| "terms":{ | |
| "field":"admin.disease_code" | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| }, | |
| "size":0 | |
| }' | less |
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