array_nulls
This controls whether the array input parser recognizes unquoted NULL as specifying a null array element. By default, this is on, allowing array values containing null values to be entered. However, PostgreSQL versions before 8.2 did not support null values in arrays, and therefore would treat NULL as specifying a normal array element with the string value “NULL”. For backward compatibility with applications that require the old behavior, this variable can be turned off. Note that it is possible to create array values containing null values even when this variable is off.
英文手册覆盖始于 PostgreSQL 7.4. 来源历史与运行验证各自保留独立版本边界。
当前阅读 PG 18·选择有来源记录的版本
此版本暂无所选语言的定义，以下显示原始英文内容。
- boot val
- on
- category
- Version and Platform Compatibility / Previous PostgreSQL Versions
- context
- user
- documented
- true
- enumvals
- 未知
- extra desc
- When turned on, unquoted NULL in an array input value means a null value; otherwise it is taken literally.
- lang
- en
- max val
- 未知
- metadata version
- 18
- min val
- 未知
- name
- array_nulls
- short desc
- Enables input of NULL elements in arrays.
- source
- pg-settings-source-snapshot
- unit
- 未知
- vartype
- bool
版本定义 PG 18
This controls whether the array input parser recognizes unquoted NULL as specifying a null array element. By default, this is on, allowing array values containing null values to be entered. However, PostgreSQL versions before 8.2 did not support null values in arrays, and therefore would treat NULL as specifying a normal array element with the string value “NULL”. For backward compatibility with applications that require the old behavior, this variable can be turned off. Note that it is possible to create array values containing null values even when this variable is off.
比较版本
来源引用
定义来源
center · PostgreSQL 18 · english-manuals:0aa053bdde4e3fa32388637453592876ea694ef3714875584027e81cac26a351
正文语言: en · english-manuals:0aa053bdde4e3fa32388637453592876ea694ef3714875584027e81cac26a351