Why does the ordering of and or with an and filter matter in elasticsearch? -


i have below query elasticsearch 2.3.1:

{     "query": {         "bool": {             "must": {                     "query": {                         "multi_match": {                             "query": "my search",                             "type": "cross_fields",                             "fields": ["field1^6", "field2", "field3^2", "field4"],                             "operator": "and",                             "zero_terms_query": "all"                         }                     }                 }             },             "filter": {                 "or": [{                     "term": {                         "pickup": true                     }                 }, {                     "term": {                         "local_delivery": true                     }                 }],                 "and": [{                     "term": {                         "field5": true                     }                 }, {                     "term": {                         "field6": "my_value"                     }                 }]             }         }     } }

this query returns 11k results. if switch ordering of or , and below:

{     "query": {         "bool": {             "must": {                     "query": {                         "multi_match": {                             "query": "my search",                             "type": "cross_fields",                             "fields": ["field1^6", "field2", "field3^2", "field4"],                             "operator": "and",                             "zero_terms_query": "all"                         }                     }                 }             },             "filter": {                 "and": [{                     "term": {                         "field5": true                     }                 }, {                     "term": {                         "field6": "my_value"                     }                 }],                 "or": [{                     "term": {                         "pickup": true                     }                 }, {                     "term": {                         "local_delivery": true                     }                 }]             }         }     } }

i have 675 results.

shouldn't these queries exact same? in essence want filter query have field5 true , field6 my_value. want either of pickup or local_delivery true, so:

(field5 == true && field6 == "my_value" || (pickup == true || local_delivery == true))

using bool query fixes problem:

"filter": {     "bool": {         "should": [{             "term": {                 "pickup": true             }         }, {             "term": {                 "local_delivery": true             }         }],         "must": [{             "term": {                 "field5": true             }         }, {             "term": {                 "field6": "my_value"             }         }]     } }

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