46 lines
1.3 KiB
Plaintext
46 lines
1.3 KiB
Plaintext
[role="xpack"]
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[testenv="basic"]
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[[sql-functions-search]]
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=== Full-Text Search Functions
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Search functions should be used when performing full-text search, namely
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when the `MATCH` or `QUERY` predicates are being used.
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Outside a, so-called, search context, these functions will return default values
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such as `0` or `NULL`.
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[[sql-functions-search-score]]
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==== `SCORE`
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.Synopsis:
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[source, sql]
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--------------------------------------------------
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SCORE()
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--------------------------------------------------
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*Input*: _none_
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*Output*: `double` numeric value
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.Description:
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Returns the {defguide}/relevance-intro.html[relevance] of a given input to the executed query.
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The higher score, the more relevant the data.
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NOTE: When doing multiple text queries in the `WHERE` clause then, their scores will be
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combined using the same rules as {es}'s
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<<query-dsl-bool-query,bool query>>.
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Typically `SCORE` is used for ordering the results of a query based on their relevance:
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["source","sql",subs="attributes,callouts,macros"]
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----
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include-tagged::{sql-specs}/docs.csv-spec[orderByScore]
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----
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However, it is perfectly fine to return the score without sorting by it:
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["source","sql",subs="attributes,callouts,macros"]
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----
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include-tagged::{sql-specs}/docs.csv-spec[scoreWithMatch]
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----
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