Full Text Queries - Match

Question 1

What is?

Answer 1

Full-text queries in Elasticsearch are designed to search and analyze large amounts of text data, making them ideal for use cases like search engines, e-commerce sites, and content management systems where text relevance is essential.

Example
Phrase and Proximity Searching: Finding words that appear together or close to each other, such as “data science” within three words of “machine learning.”

Question 2

Intervals Query - match

Answer 2

{
“intervals”: {
“content”: {
“match”: {
“query”: “Elasticsearch tutorial”,
“max_gaps”: 2,
“ordered”: true
}
}
}
}

Field (content): The query is applied to the content field, so it will search for matches specifically within this field.

Match Interval (match):
query: The value “Elasticsearch tutorial” specifies the terms to match. This phrase will be searched within the content field.
max_gaps: The setting max_gaps: 2 allows up to 2 words to appear between “Elasticsearch” and “tutorial” for a match to be valid.
ordered: The setting ordered: true requires that “Elasticsearch” must appear before “tutorial” in the content for a match to be successful.

Question 3

Intervals Query - prefix

Answer 3

{
“intervals”: {
“content”: {
“prefix”: {
“prefix”: “Elast”,
“max_gaps”: 1,
“ordered”: true
}
}
}
}

If multiple terms starting with “Elast” are found, they can be separated by only one word for a match to be valid.

Question 4

Intervals Query - wildcard

Answer 4

{
“intervals”: {
“content”: {
“wildcard”: {
“pattern”: “search*”,
“max_gaps”: 2
}
}
}
}

This query will return documents where the content field contains terms that start with “search” and where multiple matches are within a gap of 2 words of each other. For example:

“Search engines often involve searching for data.”
“We conducted a thorough search and began searching for insights.”

Will not match
“Search for new insights is essential in data science.” (if there are more than 2 words between matching terms)

Question 5

Intervals Query - all_of

Answer 5

{
“intervals”: {
“content”: {
“all_of”: {
“intervals”: [
{ “match”: { “query”: “Elasticsearch” } },
{ “match”: { “query”: “tutorial” } }
],
“max_gaps”: 5,
“ordered”: false
}
}
}
}

This example matches documents where “Elasticsearch” and “tutorial” both appear within the content field with a maximum gap of 5 words, and order doesn’t matter.

Can support more number of words in phrase than ‘match’ which is two

Question 6

Intervals Query - any_of

Answer 6

{
“intervals”: {
“content”: {
“any_of”: {
“intervals”: [
{ “match”: { “query”: “Elasticsearch” } },
{ “match”: { “query”: “Solr” } }
]
}
}
}
}

The query looks for occurrences of “Elasticsearch” or “Solr” in the content field, but does not require both to appear in the same document. The terms may appear anywhere in the content field, and only one needs to be found for a match to occur.

Question 7

Intervals Query - not_containing

Answer 7

Not_containing Interval (not_containing):
match: The “query”: “Elasticsearch” condition specifies that the term “Elasticsearch” must appear in the content.
filter: The “filter”: { “match”: { “query”: “tutorial” } } condition specifies that the term “tutorial” should not appear after “Elasticsearch” within the specified interval.

This query would return documents where “Elasticsearch” appears in the content field, but it ensures that “tutorial” is not present in the same interval following “Elasticsearch.” For example:
Would match:

“Elasticsearch is a powerful search engine used for analytics.”
“Many developers use Elasticsearch for various use cases.”

Would not match:

“The Elasticsearch tutorial is available online.”