此代码触发错误
query_string := 'SELECT '||dbms_assert.sql_object_name(trim(both ' ' from return_field))|| ' FROM '||dbms_assert.schema_name(trim(both ' ' from from_schema))|| '.'||dbms_assert.sql_object_name(trim(both ' ' from from_table))|| ' WHERE '||dbms_assert.sql_object_name(key_field) || ' = '||key_value; EXECUTE IMMEDIATE query_string into return_result;
无效的sql对象.
从文档中我觉得表中的任何对象都是一个sql对象?
什么错了?
考虑在oracle 10g中执行以下功能
在10g上下文中考虑以下函数
CREATE OR REPLACE FUNCTION scott.tab_lookup (key_field CHAR,key_value CHAR,from_schema CHAR,from_table CHAR,return_field CHAR,return_type CHAR) RETURN VARCHAR2 IS result_a varchar2(1000); query_string VARCHAR2(4000); /*version 0.5*/ BEGIN query_string := 'SELECT '||dbms_assert.qualified_sql_name(trim(from_table||'.'||return_field))|| ' FROM '||dbms_assert.schema_name(trim(from_schema))|| '.'||dbms_assert.sql_object_name(trim(from_table))|| ' WHERE '||dbms_assert.qualified_sql_name(from_table||'.'||key_field) || ' = '||key_value; IF(return_type = 'SQL') THEN result_a := query_string; ELSE EXECUTE IMMEDIATE query_string --USING key_value into result_a; END IF; RETURN (result_a); EXCEPTION WHEN NO_DATA_FOUND THEN RETURN(NULL); WHEN TOO_MANY_ROWS THEN RETURN('**ERR_DUPLICATE**'); WHEN OTHERS THEN /* ORA-44001 INVALID_SCHEMA_NAME ORA-44002 INVALID_OBJECT_NAME ORA-44003 INVALID_SQL_NAME ORA-44004 INVALID_QUALIFIED_SQL_NAME */ IF SQLCODE = -44001 THEN RETURN('*ERR_INVALID_SCHEMA*'); ELSIF SQLCODE = -44002 THEN RETURN('*ERR_INVALID_OBJECT*'); ELSIF SQLCODE = -44003 THEN RETURN('*ERR_INVALID_SQL_NAME*'); ELSIF SQLCODE = -44004 THEN RETURN('*ERR_INVALID_QALIFIED_SQLNAME*'); end if; return ('*ERR_'||sqlcode); END; /
我收到了ERR_INVALID_OBJECT
--to get the Genrated SQL as Value Select scott.tab_lookup('ID',1,'TEST','TEST_TABLE','TEST_DESC','SQL') from dual; -- -or- -- to get the value returned from database field Select scott.tab_lookup('ID','') from dual;
我的桌子就像
TEST_TABLE ==================== ID,TEST_DESC ==================== '11','TEST 1' '12','TEST 5000' '13','TEST INPUT VALUE' '14','JUNK VALUE' '50','TEST VALUE 50'
这个表是’TEST’模式,我与SCOTT连接
并且SCOTT在TEST.TEST_TABLE上有’GRANT SELECT给斯科特’
我仍然得到错误
ERR_INVALID_OBJECT
query_string := 'SELECT '||dbms_assert.qualified_sql_name(trim(from_schema||'.'||from_table||'.'||return_field))|| ' FROM '||dbms_assert.schema_name(trim(from_schema))|| '.'||dbms_assert.sql_object_name(trim(from_table))|| ' WHERE '||dbms_assert.qualified_sql_name(from_schema||'.'||from_table||'.'||key_field) || ' = '||key_value; EXECUTE IMMEDIATE query_string into return_result;
从Docs ..
> ENQUOTE_LITERAL – 引用字符串文字> ENQUOTE_NAME – 在双q-uotes中包含一个名称> NOOP – 返回值而不进行任何检查> QUALIFIED_SQL_NAME – 验证输入字符串是否为合格的SQL名称> SCHEMA_NAME – 功能验证输入字符串是否为现有模式名称> SIMPLE_SQL_NAME – 验证输入字符串是否为简单的SQL名称> SQL_OBJECT_NAME – 验证输入参数字符串是现有SQL对象的限定SQL标识符
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