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Rwky
Asked: 2018-11-04 14:36:24 +0800 CST

What is the maximum number of words allowed in a MariaDB InnoDB Full Text Search query

  • 772

I recieved this error when performing a search with 746 words (it wasn't intentional someone pasted text into the wrong box).

HA_ERR_FTS_TOO_MANY_WORDS_IN_PHRASE: Too many words in a FTS phrase or proximity search

The server is using MariaDB 10.2.14, what is the maximum limit? I couldn't find it in the MariaDB or MySQL docs.

mysql

1 Answers

  1. Best Answer

    It's 128.

    I don't know yet if it's documented anywhere, but this from the source:

    /* Maximum number of words supported in a phrase or proximity search. */
#define MAX_PROXIMITY_ITEM  128
...
    if (num_token > MAX_PROXIMITY_ITEM) {
            query->error = DB_FTS_TOO_MANY_WORDS_IN_PHRASE;
            goto func_exit;
    }

    A practical experiment supports that:

    MariaDB [foo]> select match(name) against(concat('"', repeat('foo ', 128), '" @8')) from test;
...
6 rows in set (0.01 sec)
MariaDB [foo]> select match(name) against(concat('"', repeat('foo ', 129), '" @8')) from test;
ERROR 191 (HY000): Too many words in a FTS phrase or proximity search
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