earchd 返回的每个主键。

　　最后一个配置步骤是构建索引。清单 8 显示了数据源 catalog 的索引。

　　清单 8. 描述 catalog 数据源的一个可能的索引

index catalog
{
　source = catalog
　path = /var/data/sphinx/catalog
　morphology = stem_en

　min_word_len = 3
　min_prefix_len = 0
　min_infix_len = 3
}

　　第 1 行将指向 sphinx.conf 文件中的指定数据源。第 2 行将定义存储索引数据的位置；按照约定，Sphinx 索引将被存储到 /var/data/sphinx 中。第 3 行将允许索引使用英文词法。并且第 5 行至第 7 行将告诉索引器只索引含有三个字符或更多字符的那些单词，并且为每个这样的字符的子字符串创建中缀索引（为了便于引用，清单 9 显示了 Body Parts 的完整示例 sphinx.conf 文件）。

　　清单 9. Body Parts 的示例 sphinx.conf

source catalog
{
　type = mysql

　sql_host = localhost
　sql_user = reaper
　sql_pass = s3cr3t
　sql_db = body_parts
　sql_sock = /var/run/mysqld/mysqld.sock
　sql_port = 3306

　# indexer query
　# document_id MUST be the very first field
　# document_id MUST be positive (non-zero, non-negative)
　# document_id MUST fit into 32 bits
　# document_id MUST be unique

　sql_query = \
SELECT \
　id, partno, description, \
　assembly, model \
FROM \
　Catalog;

　sql_group_column = assembly
　sql_group_column = model

　# document info query
　# ONLY used by search utility to display document information
　# MUST be able to fetch document info by its id, therefore
　# MUST contain '$id' macro
　#

　sql_query_info = SELECT * FROM Inventory WHERE id=$id
}

index catalog
{
　source = catalog
　path = /var/data/sphinx/catalog
　morphology = stem_en

　min_word_len = 3
　min_prefix_len = 0
　min_infix_len = 3
}

searchd
{
　port = 3312
　log = /var/log/searchd/searchd.log
　query_log = /var/log/searchd/query.log
　pid_file = /var/log/searchd/searchd.pid
}

　　底部的 searchd 部分将配置 searchd 守护程序本身。该部分中的条目不言自明。query.log 尤为有用：它将在运行时显示每次搜索并显示结果，例如搜索的文档数和匹配总数。
　　构建和测试索引

　　您现在已经准备好为 Body Parts 应用程序构建索引。为此，需要执行以下步骤：

　　键入 $ sudo mkdir -p /var/data/sphinx 创建目录结构 /var/data/sphinx
　　假定 MySQL 正在运行，使用如下所示的代码运行索引器来创建索引。

　　清单 10. 创建索引

$ sudo /usr/local/bin/indexer --config /usr/local/etc/sphinx.conf --all
Sphinx 0.9.7
Copyright (c) 2001-2007, Andrew Aksyonoff

using config file '/usr/local/etc/sphinx.conf'...
indexing index 'catalog'...
collected 8 docs, 0.0 MB
sorted 0.0 Mhits, 82.8% done
total 8 docs, 149 bytes
total 0.010 sec, 14900.00 bytes/sec, 800.00 docs/sec