120 lines
2.3 KiB
Markdown
120 lines
2.3 KiB
Markdown
---
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layout: default
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title: Full-Text Search
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parent: SQL
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nav_order: 8
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---
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# Full-text search
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Use SQL commands for full-text search. The SQL plugin supports a subset of the full-text queries available in OpenSearch.
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To learn about full-text queries in OpenSearch, see [Full-text queries](../../opensearch/full-text/).
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## Match
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To search for text in a single field, use `MATCHQUERY` or `MATCH_QUERY` functions.
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Pass in your search query and the field name that you want to search against.
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```sql
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SELECT account_number, address
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FROM accounts
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WHERE MATCH_QUERY(address, 'Holmes')
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```
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Alternate syntax:
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```sql
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SELECT account_number, address
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FROM accounts
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WHERE address = MATCH_QUERY('Holmes')
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```
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| account_number | address
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:--- | :---
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1 | 880 Holmes Lane
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## Multi match
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To search for text in multiple fields, use `MULTI_MATCH`, `MULTIMATCH`, or `MULTIMATCHQUERY` functions.
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For example, search for `Dale` in either the `firstname` or `lastname` fields:
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```sql
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SELECT firstname, lastname
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FROM accounts
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WHERE MULTI_MATCH('query'='Dale', 'fields'='*name')
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```
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| firstname | lastname
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:--- | :---
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Dale | Adams
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## Query string
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To split text based on operators, use the `QUERY` function.
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```sql
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SELECT account_number, address
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FROM accounts
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WHERE QUERY('address:Lane OR address:Street')
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```
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| account_number | address
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:--- | :---
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1 | 880 Holmes Lane
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6 | 671 Bristol Street
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13 | 789 Madison Street
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The `QUERY` function supports logical connectives, wildcard, regex, and proximity search.
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## Match phrase
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To search for exact phrases, use `MATCHPHRASE`, `MATCH_PHRASE`, or `MATCHPHRASEQUERY` functions.
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```sql
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SELECT account_number, address
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FROM accounts
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WHERE MATCH_PHRASE(address, '880 Holmes Lane')
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```
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| account_number | address
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:--- | :---
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1 | 880 Holmes Lane
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## Score query
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To return a relevance score along with every matching document, use `SCORE`, `SCOREQUERY`, or `SCORE_QUERY` functions.
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You need to pass in two arguments. The first is the `MATCH_QUERY` expression. The second is an optional floating point number to boost the score (default value is 1.0).
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```sql
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SELECT account_number, address, _score
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FROM accounts
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WHERE SCORE(MATCH_QUERY(address, 'Lane'), 0.5) OR
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SCORE(MATCH_QUERY(address, 'Street'), 100)
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ORDER BY _score
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```
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| account_number | address | score
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:--- | :---
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1 | 880 Holmes Lane | 0.5
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6 | 671 Bristol Street | 100
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13 | 789 Madison Street | 100
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