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42 lines
1.2 KiB
Text
42 lines
1.2 KiB
Text
[discrete]
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[[esql-like-operator]]
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=== `LIKE`
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// tag::body[]
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Use `LIKE` to filter data based on string patterns using wildcards. `LIKE`
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usually acts on a field placed on the left-hand side of the operator, but it can
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also act on a constant (literal) expression. The right-hand side of the operator
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represents the pattern.
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The following wildcard characters are supported:
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* `*` matches zero or more characters.
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* `?` matches one character.
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include::./types/like.asciidoc[]
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[source.merge.styled,esql]
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----
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include::{esql-specs}/docs.csv-spec[tag=like]
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----
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[%header.monospaced.styled,format=dsv,separator=|]
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|===
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include::{esql-specs}/docs.csv-spec[tag=like-result]
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|===
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Matching the exact characters `*` and `.` will require escaping.
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The escape character is backslash `\`. Since also backslash is a special character in string literals,
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it will require further escaping.
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[source.merge.styled,esql]
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----
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include::{esql-specs}/string.csv-spec[tag=likeEscapingSingleQuotes]
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----
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To reduce the overhead of escaping, we suggest using triple quotes strings `"""`
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[source.merge.styled,esql]
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----
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include::{esql-specs}/string.csv-spec[tag=likeEscapingTripleQuotes]
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----
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// end::body[]
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