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A `has_child` query is a query type in Elasticsearch that is used to search for parent documents based on the content of their child documents. This query is used to find parent documents that have at least one child document matching a specified query. When a `has_child` query is executed, Elasticsearch searches for parent documents … Read more

When a nested query is executed in Elasticsearch, the query searches for documents that contain at least one nested object that matches the specified query criteria. The nested query can be used to search for documents that contain a specific combination of nested objects, as well as to filter out documents that do not contain … Read more

A nested query is a query type in Elasticsearch that is used to search for documents that contain a specific combination of nested objects. The nested query is often used for querying documents that contain arrays of objects, where each object has its own set of fields. When a nested query is executed, Elasticsearch searches … Read more

When a function score query is executed in Elasticsearch, it applies one or more scoring functions to each document in the search results, and then combines the scores from each function to calculate a final score for each document. The resulting scores are used to rank the search results. Here’s an example of a function … Read more

A function score query is a query type in Elasticsearch that is used to rank search results based on one or more scoring functions. The function score query is often used to improve search relevance and accuracy, particularly in cases where standard relevance ranking may not be sufficient. When a function score query is executed, … Read more

When a dismax query is executed in Elasticsearch, it constructs a query that searches for all the specified search terms across multiple fields, but gives more weight to documents that contain more of the terms. The dismax query also uses a disjunction operator to combine the scores from each field into a single score for … Read more

A dismax query (short for “disjunction max query”) is a query type in Elasticsearch that is used to search for documents based on multiple search terms, while giving more weight to documents that contain more of the search terms. The dismax query is often used for improving search relevance and accuracy, particularly in cases where … Read more

When a common terms query is executed in Elasticsearch, it first identifies the terms that are common or frequent in the specified field, using a list of stopwords or a minimum document frequency threshold. The common terms query then searches for documents that contain at least one informative term and at least one common term. … Read more

A common terms query is a query type in Elasticsearch that is used to search for documents that contain terms that are common or frequent in a particular field, but not necessarily informative. The common terms query is often used to filter out common terms or stopwords from search results, while still returning documents that … Read more

When a multi-match query is executed in Elasticsearch, it searches for documents that contain one or more search terms in one or more specified fields. The multi-match query constructs a query that searches for the term in all specified fields and returns any documents that contain a matching term in any of the specified fields. … Read more