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📎 #elasticsearch #wip

es_query_dsl

Compound Query Clauses​

  • Use:
    • For combining clauses
    • Alter behavior (e.g. constant_score)
  • Wraps leaf / other compound clauses
  • bool, dis_max
  • must - logical AND
  • must_not - logical NOT
  • should - logical OR

Logical "AND" Conditions​

  • must or filter
    • filter does not affect score
  • All conditions specified must be satisfied within these clauses for a document to match
{
  "query": {
    "bool": {
      "must": [
        { "term": { "field1": "value1" } },
        { "term": { "field2": "value2" } }
      ]
    }
}

{
  "query": {
    "bool": {
      "filter": [
        { "term": { "field1": "value1" } },
        { "term": { "field2": "value2" } }
      ]
    }
 }

match documents where field1 == value1 and field2 == value2

Logical "OR" Conditions​

  • use should clause
  • At least one conditions in should satisfied > document match
    • Can control this number with minimum_should_match
{
  "query": {
    "bool": {
      "should": [
        { "term": { "field1": "value1" } },
        { "term": { "field2": "value2" } }
      ],
      "minimum_should_match": 1
    }
}

match documents where field1 == value1 OR field2 == value2

Combining "AND" and "OR" Conditions​

{
  "query": {
    "bool": {
      "must": [{ "term": { "field1": "value1" } }],
      "should": [
        { "term": { "field2": "value2" } },
        { "term": { "field3": "value3" } }
      ],
      "filter": [{ "term": { "field4": "value4" } }],
      "minimum_should_match": 1
    }
  }
}
  • Match documents where
    • field1 == value1 AND
    • field4 == value4 AND
    • field2 == value2 || field3 == value3

Logical NOT​

  • must_not

Leaf Query Clauses​

es_leaf_query_clauses.png

match​

term​

range​

exists​

prefix​

ids​

fuzzy​

References