\dX
列出扩展统计信息。如果指定了 pattern ，则只列出名称与模式匹配的扩展统计信息。如果在命令名后追加 x ，结果会以扩展模式显示。
当前查看 PostgreSQL 18.6。
说明
列出扩展统计信息。如果指定了 pattern ，则只列出名称与模式匹配的扩展统计信息。如果在命令名后追加 x ，结果会以扩展模式显示。
- 客户端
- psql 18.6
- 区分大小写的写法
- \dX
用法
\dX[x] [ pattern ]本版手册中的写法
| 命令 | 手册中的后缀修饰符 |
|---|---|
| \dX | x |
手册定义
\dX[x] [pattern]-
列出扩展统计信息。如果指定了
pattern，则只列出名称与模式匹配的扩展统计信息。如果在命令名后追加x，结果会以扩展模式显示。每种扩展统计的状态显示在以统计种类命名的列中，例如 Ndistinct。defined 表示创建统计时请求了该统计，NULL 表示未请求。若要判断 ANALYZE 是否运行过、统计是否可供规划器使用，可查询 pg_stats_ext。
相关条目
文档与源码
来源构建
- 版本
- 18.6
- 构建
- https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2
- 来源指纹
ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8
版本比较
PostgreSQL 17 → 18: 属性变化。
以下差异保留原始字段名与英文源描述。
--- PostgreSQL 17
+++ PostgreSQL 18
@@ -1,7 +1,12 @@
{
- "definition": "Lists extended statistics. If pattern is specified, only those extended statistics whose names match the pattern are listed. The status of each kind of extended statistics is shown in a column named after its statistic kind (e.g. Ndistinct). defined means that it was requested when creating the statistics, and NULL means it wasn't requested. You can use pg_stats_ext if you'd like to know whether ANALYZE was run and statistics are available to the planner.",
- "modifiers": [],
- "signature": "\\dX [ pattern ]",
+ "definition": "Lists extended statistics. If pattern is specified, only those extended statistics whose names match the pattern are listed. If x is appended to the command name, the results are displayed in expanded mode. The status of each kind of extended statistics is shown in a column named after its statistic kind (e.g. Ndistinct). defined means that it was requested when creating the statistics, and NULL means it wasn't requested. You can use pg_stats_ext if you'd like to know whether ANALYZE was run and statistics are available to the planner.",
+ "modifiers": [
+ {
+ "command": "\\dX",
+ "modifiers": "x"
+ }
+ ],
+ "signature": "\\dX[x] [ pattern ]",
"spellings": [
"\\dX"
]比较已记录的接口与属性，排除来源指纹和构建元数据。某个样本中没有记录，不能据此判断实际引入或移除的版本。
相关条目
导出 JSON · 返回psql 命令 · 收录范围为 PostgreSQL 14 至 20；最早采样版本不一定是实际引入版本。