Objectif :
- Réaliser plusieurs recherches et renvoyer le meilleur résultat
- Algorithme pour déterminer le meilleur résultat
Utiliser les différents mode de recherche en supprimant des critères
Utiliser les critères en mode texte ou en tant que filtre
Utilisation de SphinxQL
Syntaxe d'un select
SELECT
select_expr [, select_expr ...]
FROM index [, index2 ...]
[WHERE where_condition]
[GROUP [N] BY {col_name | expr_alias} [, {col_name | expr_alias}]]
[WITHIN GROUP ORDER BY {col_name | expr_alias} {ASC | DESC}]
[HAVING having_condition]
[ORDER BY {col_name | expr_alias} {ASC | DESC} [, ...]]
[LIMIT [offset,] row_count]
[OPTION opt_name = opt_value [, ...]]
[FACET facet_options[ FACET facet_options][ ...]]
SELECT * FROM test WHERE MATCH('@title hello @body world')
OPTION ranker=bm25, max_matches=3000,
field_weights=(title=10, body=3), agent_query_timeout=10000
OPTION
field_weights
index_weights
max_matches
ranker
WHERE clause. This clause will map both to fulltext query and filters.
Comparison operators (=, !=, <, >, <=, >=), IN, AND, NOT, and BETWEEN are all supported
and map directly to filters. OR is not supported yet but will be in the future.
MATCH('query') is supported and maps to fulltext query. Query will be interpreted
according to full-text query language rules. There must be at most one MATCH() in the clause.
Liste des opérateurs possible dans "select_expr"
Retour du select
Liste des éléments indexés hors fulltext
mysql -h0 -P9306
SELECT *, WEIGHT() weight FROM ent, ent_phx WHERE MATCH('peugeot') ORDER BY rang DESC;
mysql> SHOW META;
+---------------+---------+
| Variable_name | Value |
+---------------+---------+
| total | 1000 |
| total_found | 2451 |
| time | 0.022 |
| keyword[0] | peugeot |
| docs[0] | 2451 |
| hits[0] | 3907 |
+---------------+---------+
6 rows in set (0.00 sec)
Multi-statement queries
SELECT follow by SHOW META
SELECT * FROM myindex
WHERE MATCH('@(title,content) find me fast');
