函数相关操作
最近更新时间: 2024-06-12 15:06:00
建立函数。
postgres=# CREATE OR REPLACE FUNCTION tbase_f1(a_1 text) returns text as postgres-# $$ postgres$# begin postgres$# return a_1; postgres$# end; postgres$# $$ postgres-# language plpgsql; CREATE FUNCTION postgres=# CREATE OR REPLACE FUNCTION pgxc.tbase_f2(a_2 text) returns text as postgres-# $$ postgres$# begin postgres$# return a_2; postgres$# end; postgres$# $$ postgres-# language plpgsql; CREATE FUNCTION postgres=#\df查看函数列表。
postgres=# \df List of functions Schema | Name | Result data type |Argument data types | Type --------+----------+------------------+---------------------+-------- pgxc |tbase_f2 | text | a_2 text | normal public | tbase_f1 | text | a_1 text | normal (2 rows)\df+查看函数列表详细信息（包含注释），定义。
postgres=# \x Expanded display is on. postgres=# \df+ tbase* List of functions -[ RECORD 1 ]-------+-------------------- Schema | pgxc Name | tbase_f2 Result data type | text Argument data types | a_2 text Type | normal Volatility | volatile Parallel | unsafe Owner | tbase Security | invoker Access privileges | Language | plpgsql Source code | + | begin + | return a_2; + | end; + | Description | -[ RECORD 2 ]-------+-------------------- Schema | public Name | tbase_f1 Result data type | text Argument data types | a_1 text Type | normal Volatility | volatile Parallel | unsafe Owner | tbase Security | invoker Access privileges | Language | plpgsql Source code | + | begin + | return a_1;+ | end; + | Description |\df+函数名显示某个函数的详细信息。
postgres=# \df+ tbase_f1 List of functions -[ RECORD 1 ]-------+-------------------- Schema | public Name | tbase_f1 Result data type | text Argument data types | a_1 text Type | normal Volatility | volatile Parallel | unsafe Owner | tbase Security | invoker Access privileges | Language | plpgsql Source code | + | begin + | return a_1;+ | end; + | Description |\df+通配符列出适配的函数。
postgres=# \df+ tbase* List of functions -[ RECORD 1 ]-------+-------------------- Schema | pgxc Name | tbase_f2 Result data type | text Argument data types | a_2 text Type | normal Volatility | volatile Parallel | unsafe Owner | tbase Security | invoker Access privileges | Language | plpgsql Source code | + | begin + | return a_2; + | end; + | Description | -[ RECORD 2 ]-------+-------------------- Schema | public Name | tbase_f1 Result data type | text Argument data types | a_1 text Type | normal Volatility | volatile Parallel | unsafe Owner | tbase Security | invoker Access privileges | Language | plpgsql Source code | + | begin + | return a_1;+ | end; + | Description | postgres=# \df+ *f1 List of functions -[ RECORD 1 ]-------+-------------------- Schema | public Name | tbase_f1 Result data type | text Argument data types | a_1 text Type | normal Volatility | volatile Parallel | unsafe Owner | tbase Security | invoker Access privileges | Language | plpgsql Source code | + | begin + | return a_1;+ | end; + | Description