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By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."]}, "15": {"facts": [{"label": "\u5ba2\u6237\u7aef\u5e93", "value": "libpq 15.19"}, {"label": "\u624b\u518c\u5b9a\u4e49", "value": "\u624b\u518c\u5df2\u8bb0\u8f7d"}, {"label": "\u6e90\u7801\u4e2d\u7684\u73af\u5883\u53d8\u91cf\u56de\u9000", "value": "PGSSLMINPROTOCOLVERSION"}, {"label": "\u7f16\u8bd1\u65f6\u56de\u9000\u8868\u8fbe\u5f0f", "value": "\"TLSv1.2\""}], "tables": [{"key": "environment", "rows": [{"name": {"url": "/docs/15/libpq-envars.html", "text": "PGSSLMINPROTOCOLVERSION"}, "description": "PGSSLMINPROTOCOLVERSION \u7684\u884c\u4e3a\u4e0e ssl_min_protocol_version \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": 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Valid values are TLSv1 , TLSv1.1 , TLSv1.2 and TLSv1.3 . The supported protocols depend on the version of OpenSSL used, older versions not supporting the most modern protocol versions. If not specified, the default is TLSv1.2 , which satisfies industry best practices as of this writing.", "/versions/15/facts/0/label": "Client library", "/versions/15/facts/1/label": "Manual definition", "/versions/15/facts/1/value": "Documented", "/versions/15/facts/2/label": "Source environment fallback", "/versions/15/facts/3/label": "Compiled fallback expression", "/versions/15/tables/0/title": "Environment fallback", "/versions/15/related/0/label": "Connection service file", "/versions/15/related/1/label": "Password file", "/versions/15/related/2/label": "All libpq environment variables", "/versions/15/sections/0/title": "Default resolution and service-file precedence", "/versions/15/sections/1/title": "Environment variable evidence", "/versions/15/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. 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"}, "comparison": {"left": "12", "right": "13", "status": "added", "diff": "--- PostgreSQL 12\n+++ PostgreSQL 13\n@@ -1 +1,10 @@\n-\u8be5\u7248\u672a\u6536\u5f55\n+{\n+ \"compiled_default_expression\": \"\\\"TLSv1.2\\\"\",\n+ \"default_evidence\": [\n+ \"This parameter specifies the minimum SSL/TLS protocol version to allow for the connection. Valid values are TLSv1 , TLSv1.1 , TLSv1.2 and TLSv1.3 . The supported protocols depend on the version of OpenSSL used, older versions not supporting the most modern protocol versions. If not specified, the default is TLSv1.2 , which satisfies industry best practices as of this writing.\"\n+ ],\n+ \"definition\": \"This parameter specifies the minimum SSL/TLS protocol version to allow for the connection. Valid values are TLSv1 , TLSv1.1 , TLSv1.2 and TLSv1.3 . The supported protocols depend on the version of OpenSSL used, older versions not supporting the most modern protocol versions. If not specified, the default is TLSv1.2 , which satisfies industry best practices as of this writing.\",\n+ \"documented\": true,\n+ \"environment\": \"PGSSLMINPROTOCOLVERSION\",\n+ \"keyword\": \"ssl_min_protocol_version\"\n+}"}}