README

Human query to ts_query for PostgreSQL full text search (https://www.postgresql.org/docs/12/textsearch.html). Provides a clement parser and associated tools for a convert human query to query which can be used ih Postgres Full Text Search. Lenient in that is will produce a parse tree for any input, given a default operator and by generally ignoring any unparsable syntax.

The query language supports the following features at a high level:

• Boolean operators: AND (infix), OR (infix), "-" (prefix) with an implied default operator and precedence rules, e.g. "boy OR girl -infant"

• Proximity Near Operator (Nx) - television N2 violence - Finds words within x number of words from each other, regardless of the order in which they occur.

• Proximity Within Operator (Wx) - Franklin W2 Roosevelt - Finds words within x number of words from each other, in the order they are entered in the search.

• Optional parenthesis for explicitly denoting precedence.

• Quoted phrases (for proximity matching)

Documentation

// Some function, which getting SQL query and return single string result
$closure = function (string $sql) use ($connection) {
    return $connection->fetchOne($sql);
};
$humanToTsQuery = new HumanToTsQuery('Opel AND (auto car (patrol OR diesel OR "electric car") AND -sale)');
$tsQuery = $humanToTsQuery->getQuery($closure);
var_dump($tsQuery); // "opel & (auto & car & (patrol | diesel | (electr <-> car)) & !sale)"

$humanToTsQuery = new HumanToTsQuery('indigenous N2 ("debt financing" OR lalala) AND ("New York" OR Boston)');
$tsQuery = $humanToTsQuery->getQuery($closure);
var_dump($tsQuery); // "(indigen <2> ((debt <-> financ) | lalala ) | ((debt <-> financ) | lalala ) <2> indigen | indigen <1> ((debt <-> financ) | lalala ) | ((debt <-> financ) | lalala ) <1> indigen) & ((new <-> york) | boston )"

$humanToTsQuery = new HumanToTsQuery('(indigenous OR texas) W2 ("debt financing" OR lalala) AND ("New York" OR Boston)');
$tsQuery = $humanToTsQuery->getQuery($closure);
var_dump($tsQuery); // "((indigen | texa ) <2> ((debt <-> financ) | lalala ) | (indigen | texa ) <1> ((debt <-> financ) | lalala )) & ((new <-> york) | boston )"

Running the Tests

Install the Composer dev dependencies:

composer install --dev

Then, run the test suite using PHPUnit:

vendor/bin/phpunit

License

This bundle is released under the MIT license. See the complete license in the bundle:

LICENSE