PostgreSql 查询数组值

Question

我将以下 JSON 格式存储为 postgresql 中的 JSONB 列。

{DisplayName":"Bob marley","FName":"Bob","Title":null,"LName":"Marley","State":null,"EmailAddresses":["bob.marley@hotmail.com","bobmarley@gmail.com"]},
{DisplayName":"Bob martin","FName":"Bob ","Title":null,"LName":"Martin","State":null,"EmailAddresses":["bob.martin@hotmail.com","bobmartin@gmail.com"]}

我想查询以 Bob 开头的 EmailAddresses 数组。我能够使用 LIKE 和 ILIKE 运算符查询普通字符串类型的键，但是要在 ARRAY 类型中搜索，就会出现问题。请指教

Answer 1

如果您想检查 jsonb 字段中数组的任何元素是否与您的掩码匹配：

SELECT *
  FROM jtable
 WHERE EXISTS (
        SELECT 1
          FROM jsonb_array_elements_text(jfield->'EmailAddresses') AS j
         WHERE j  ~ 'bob'
      )

                                                                                jfield                                                                                
----------------------------------------------------------------------------------------------------------------------------------------------------------------------
 {"FName": "Bob", "LName": "Marley", "State": null, "Title": null, "DisplayName": "Bob marley", "EmailAddresses": ["bob.marley@hotmail.com", "bobmarley@gmail.com"]}
 {"FName": "Bob ", "LName": "Martin", "State": null, "Title": null, "DisplayName": "Bob martin", "EmailAddresses": ["bob.martin@hotmail.com", "bobmartin@gmail.com"]}
(2 rows)

或者如果您想要匹配掩码的电子邮件列表：

WITH w AS (
    SELECT jsonb_array_elements_text(jfield->'EmailAddresses') AS emails,
           *
      FROM jtable
)
SELECT * FROM w WHERE emails ~ 'bobm'


       emails        |                                                                                jfield                                                                                
---------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------
 bobmarley@gmail.com | {"FName": "Bob", "LName": "Marley", "State": null, "Title": null, "DisplayName": "Bob marley", "EmailAddresses": ["bob.marley@hotmail.com", "bobmarley@gmail.com"]}
 bobmartin@gmail.com | {"FName": "Bob ", "LName": "Martin", "State": null, "Title": null, "DisplayName": "Bob martin", "EmailAddresses": ["bob.martin@hotmail.com", "bobmartin@gmail.com"]}
(2 rows)

PostgreSql 查询数组值

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