pg_transform

字段

PostgreSQL 18 的 5 个字段，按定义顺序排列。说明默认用本站手册的译文，没有译文的按英文原文显示。

演化历史

相邻两个大版本之间的差异，新的在前。版本号链到该版的字段表。

1. PostgreSQL 14 ← 13 仅描述更新

   2 处描述更新

   • trffromsql The OID of the function to use when converting the data type for input to the procedural language (e.g., function parameters). Zero is stored if this operation is not supported. The OID of the function to use when converting the data type for input to the procedural language (e.g., function parameters). Zero is stored if the default behavior should be used.
   • trftosql The OID of the function to use when converting output from the procedural language (e.g., return values) to the data type. Zero is stored if this operation is not supported. The OID of the function to use when converting output from the procedural language (e.g., return values) to the data type. Zero is stored if the default behavior should be used.

2. PostgreSQL 13 ← 12 仅描述更新

   1 处描述更新

   • oid Row identifier. Row identifier

3. PostgreSQL 12 ← 11 结构变更

   oid：隐式列 → 常规列

   1 处描述更新

   • oid Row identifier (hidden system attribute; explicitly select oid). Row identifier.

4. PostgreSQL 9.5 ← 9.4 新增此关系

   共 5 个字段

字段矩阵

每个字段在 13 个收录版本里的存在情况；方格指向该版的字段表。「有变」指类型、可空、隐式或数组维数与上一版不同。

存在 有变 已移除 不存在

系统列

同类关系