如何使用子查询在Sphinx的多值属性（MVA）查询类型

Question

我的数据库是 PostgreSQL，我想使用 Sphinx 搜索引擎来索引我的数据；

如何使用sql_attr_multi获取关系数据？

postgresql 中的表，模式是：

crm=# \d orders
                                   Table "orders"
     Column      |            Type             |               Modifiers
-----------------+-----------------------------+----------------------------------------
 id              | bigint                      | not null
 trade_id        | bigint                      | not null
 item_id         | bigint                      | not null
 price           | numeric(10,2)               | not null
 total_amount    | numeric(10,2)               | not null
 subject         | character varying(255)      | not null default ''::character varying
 status          | smallint                    | not null default 0
 created_at      | timestamp without time zone | not null default now()
 updated_at      | timestamp without time zone | not null default now()
Indexes:
    "orders_pkey" PRIMARY KEY, btree (id)
    "orders_trade_id_idx" btree (trade_id)




crm=# \d trades
                                     Table "trades"
        Column         |            Type             |               Modifiers
-----------------------+-----------------------------+---------------------------------------
 id                    | bigint                      | not null
 operator_id           | bigint                      | not null
 customer_id           | bigint                      | not null
 category_ids          | bigint[]                    | not null
 total_amount          | numeric(10,2)               | not null
 discount_amount       | numeric(10,2)               | not null
 created_at            | timestamp without time zone | not null default now()
 updated_at            | timestamp without time zone | not null default now()
Indexes:
    "trades_pkey" PRIMARY KEY, btree (id)

Sphinx 的配置是：

source trades_src
{
  type        = pgsql
  sql_host    = 10.10.10.10
  sql_user    = ******
  sql_pass    = ******
  sql_db      = crm
  sql_port    = 5432

  sql_query   = \
    SELECT id, operator_id, customer_id, category_ids, total_amount, discount_amount, \
         date_part('epoch',created_at) AS created_at, \
         date_part('epoch',updated_at) AS updated_at \
      FROM public.trades;

  #attributes
  sql_attr_bigint = operator_id
  sql_attr_bigint = customer_id

  sql_attr_float  = total_amount
  sql_attr_float  = discount_amount


  sql_attr_multi = bigint category_ids from field category_ids

  #sql_attr_multi = bigint order_ids from query; SELECT id FROM orders
  #how can i add where condition is the query for orders? eg. WHERE trade_id = ?


  sql_attr_timestamp  = created_at
  sql_attr_timestamp  = updated_at
}

我在category_ids字段上使用了MVA (multi-valued attributes)，它是Postgresql中的ARRAY类型。

但我不知道如何在 order_ids 上定义 MVA。会通过子查询吗？

Answer 1

从 sphinx 论坛复制....

sql_attr_multi = bigint order_ids from query; SELECT trade_id,id FROM orders ORDER BY trade_id

查询的第一列是狮身人面像'document_id'（即main sql_query中的id）

第二列是要插入到该文档的 MVA 数组中的值。

（ORDER BY 可能不是严格需要的，但如果按 document_id IIRC 命令，sphinx 处理数据的速度要快得多）

如何使用子查询在Sphinx的多值属性（MVA）查询类型

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