PgHero Rails - 列“pid”不存在

Question

我正在尝试在应用程序中设置PgHero。我不断收到以下错误

Started GET "/pghero" for 127.0.0.1 at 2014-09-09 12:35:41 +0530 Processing by PgHero::HomeController#index as HTML Geokit is using the domain: localhost (3.9ms) SELECT COUNT(*) AS count FROM pg_extension WHERE extname = 'pg_stat_statements' CACHE (0.0ms) SELECT COUNT(*) AS count FROM pg_extension WHERE extname = 'pg_stat_statements' (1.5ms) SELECT pid, state, application_name AS source, age(now(), xact_start) AS duration, waiting, query, xact_start AS started_at FROM pg_stat_activity WHERE query <> '<insufficient privilege>' AND state <> 'idle' AND pid <> pg_backend_pid() AND now() - query_start > interval '1 minutes' ORDER BY query_start DESC PG::Error: ERROR: column "pid" does not exist LINE 1: SELECT pid, state, application_name AS source, age(now(), xa... ^ : SELECT pid, state, application_name AS source, age(now(), xact_start) AS duration, waiting, query, xact_start AS started_at FROM pg_stat_activity WHERE query <> '<insufficient privilege>' AND state <> 'idle' AND pid <> pg_backend_pid() AND now() - query_start > interval '1 minutes' ORDER BY query_start DESC

我按照documentation 中提到的所有步骤和故障排除

postgresql.conf

shared_preload_libraries = 'pg_stat_statements' custom_variable_classes = 'pg_stat_statements' pg_stat_statements.track = all

重启PG服务器后，我使用CREATE extension pg_stat_statements;创建扩展，然后使用SELECT pg_stat_statements_reset();重置统计信息

在我重新启动 Rails 服务器并点击 /pghero 后出现相同的错误。

看起来像 pgsql 问题。我不擅长 pg 管理员。谁能告诉我解决方法？

Answer 1

使用 PostgreSQL 9.2，或查看是否有支持 9.1 的旧 pghero 版本。鉴于以下情况，似乎没有：

支持 PostgreSQL 9.2+

就在自述文件顶部附近。

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错误解释：

pg_stat_activity 中的 pid 列在 PostgreSQL 9.1 及更早版本上被命名为 procpid。这个工具似乎不检查 PostgreSQL 版本并使用适当的名称，它只是假设它正在与 9.2 或更高版本通信。

因此，您可以向 PgHero 添加检查 SELECT current_setting('server_version_num') 的值，使其切换到旧列名称，并根据需要提交拉取请求。

我个人只是升级到 9.3。