Oracle查找function信息的方式汇总

-- 查看函数基本信息
SELECT object_name, created, status, last_ddl_time
FROM user_objects
WHERE object_type = 'FUNCTION'
ORDER BY object_name;

-- 查看函数详情（包括参数、返回类型）
SELECT object_name, procedure_name, overload, 
       argument, data_type, in_out
FROM user_arguments
WHERE package_name IS NULL
AND object_name = '你的函数名';

-- 查看函数源代码
SELECT text
FROM user_source
WHERE name = '你的函数名'
AND type = 'FUNCTION'
ORDER BY line;

-- 查看所有可访问的函数
SELECT owner, object_name, created, status
FROM all_objects
WHERE object_type = 'FUNCTION'
ORDER BY owner, object_name;

-- 查看特定函数的参数信息
SELECT owner, object_name, argument_name, 
       data_type, in_out, position
FROM all_arguments
WHERE package_name IS NULL
AND object_name = '函数名';

-- 查看Oracle文档中的函数
DESC DBMS_METADATA
DESC DBMS_LOB
DESC DBMS_UTILITY

-- 查看系统包中的函数
SELECT DISTINCT name, type
FROM all_source
WHERE owner = 'SYS'
AND (UPPER(text) LIKE '%FUNCTION%' OR type = 'PACKAGE')
AND name LIKE 'DBMS_%';

-- USER_PROCEDURES: 用户的过程和函数
SELECT object_name, procedure_name, aggregate, 
       parallel, deterministic
FROM user_procedures
WHERE object_type = 'FUNCTION';

-- ALL_PROCEDURES: 所有可访问的过程和函数
SELECT owner, object_name, procedure_name
FROM all_procedures
WHERE object_type = 'FUNCTION';

-- 查看函数依赖关系
SELECT name, type, referenced_name, referenced_type
FROM user_dependencies
WHERE name = '你的函数名';

-- 使用DESCRIBE命令
DESC 函数名;  -- 注意：这只对某些对象有效

-- 查看函数编译错误
SHOW ERRORS FUNCTION 函数名;

-- 查找源代码中包含特定文本的函数
SELECT DISTINCT name, type
FROM user_source
WHERE UPPER(text) LIKE '%特定文本%'
AND type = 'FUNCTION';

-- 使用DBMS_METADATA获取DDL
SELECT DBMS_METADATA.GET_DDL('FUNCTION', '函数名', '用户名')
FROM dual;

SELECT grantee, privilege, grantable
FROM user_tab_privs
WHERE table_name = '函数名';

SELECT 
    o.object_name,
    o.created,
    o.status,
    a.argument_name,
    a.data_type,
    a.in_out,
    a.position
FROM user_objects o
LEFT JOIN user_arguments a ON o.object_name = a.object_name
WHERE o.object_type = 'FUNCTION'
AND o.object_name = '&函数名'
ORDER BY a.position;

-- 函数依赖哪些对象
SELECT referenced_name, referenced_type
FROM user_dependencies
WHERE name = '函数名'
AND type = 'FUNCTION';

-- 哪些对象依赖此函数
SELECT name, type
FROM user_dependencies
WHERE referenced_name = '函数名';