pg_catalog 模式中的 pg_amproc 表记录了与索引访问方法操作类相关支持过程的信息。表中的每一行代表一个属于操作类的支持过程。
| 列名 | 类型 | 引用 | 描述 |
|---|---|---|---|
oid | oid | 行标识符（隐藏属性，需显式选择） | |
amprocfamily | oid | pg_opfamily.oid | 所属操作符家族 |
amproclefttype | oid | pg_type.oid | 相关操作符的左输入数据类型 |
amprocrighttype | oid | pg_type.oid | 相关操作符的右输入数据类型 |
amprocnum | smallint | 支持过程编号 | |
amproc | regproc | pg_proc.oid | 支持过程的 OID |
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