Get the dynamic query alias name
Hi allI have a plsql function using a dynamic query.
And the function takes an entire sql query as a parameter.
The main problem is that the function must get what aliases or columns were interviewed.
For example,.
FUNCTION_GET_QUERY_ALIAS ('SELECT 1 AS col1, col2 FROM DUAL 2 AS')
Inside the function, he must find the alias name COL1 and COL2.
I would be grateful for any help.
I modified print_table as fact and function to meet your needs.
SQL> CREATE OR REPLACE TYPE my_column_object AS OBJECT(ruw_number integer, column_name VARCHAR2(1000), column_val VARCHAR2(1000))
2 /
Type created.
SQL> CREATE OR REPLACE TYPE my_table_type AS TABLE OF my_column_object
2 /
Type created.
SQL> CREATE OR REPLACE FUNCTION print_table( p_query in varchar2 ) RETURN my_table_type PIPELINED
2 AS
3 l_theCursor INTEGER DEFAULT DBMS_SQL.OPEN_CURSOR;
4 l_columnValue VARCHAR2(4000);
5 l_status INTEGER;
6 l_descTbl DBMS_SQL.DESC_TAB;
7 l_colCnt NUMBER;
8 l_rcount INTEGER := 0;
9 BEGIN
10 DBMS_SQL.PARSE( l_theCursor, p_query, dbms_sql.native );
11
12 DBMS_SQL.DESCRIBE_COLUMNS( l_theCursor, l_colCnt, l_descTbl );
13
14 FOR i IN 1 .. l_colCnt
15 LOOP
16 DBMS_SQL.DEFINE_COLUMN(l_theCursor, i, l_columnValue, 4000);
17 end loop;
18
19 l_status := DBMS_SQL.EXECUTE(l_theCursor);
20
21 WHILE ( DBMS_SQL.FETCH_ROWS(l_theCursor) > 0 )
22 LOOP
23 l_rcount := l_rcount + 1;
24 FOR i IN 1 .. l_colCnt
25 LOOP
26 DBMS_SQL.COLUMN_VALUE( l_theCursor, i, l_columnValue );
27
28 PIPE ROW(my_column_object(l_rcount,l_descTbl(i).col_name,l_columnValue));
29 END LOOP;
30 END LOOP;
31
32 RETURN;
33 end;
34 /
Function created.
SQL> select * from table(print_table('select * from emp'))
2 /
RUW_NUMBER COLUMN_NAME COLUMN_VAL
---------- -------------------- --------------------
1 EMPNO 7369
1 ENAME SMITH
1 JOB CLERK
1 MGR 7902
1 HIREDATE 17-DEC-80
1 SAL 800
1 COMM
1 DEPTNO 20
1 DIV 10
2 EMPNO 7499
2 ENAME ALLEN
RUW_NUMBER COLUMN_NAME COLUMN_VAL
---------- -------------------- --------------------
2 JOB SALESMAN
2 MGR 7698
2 HIREDATE 20-FEB-81
2 SAL 1600
2 COMM 300
2 DEPTNO 30
2 DIV 10
3 EMPNO 7521
3 ENAME WARD
3 JOB SALESMAN
3 MGR 7698
RUW_NUMBER COLUMN_NAME COLUMN_VAL
---------- -------------------- --------------------
3 HIREDATE 22-FEB-81
3 SAL 1250
3 COMM 500
3 DEPTNO 30
3 DIV 10
4 EMPNO 7566
4 ENAME JONES
4 JOB MANAGER
4 MGR 7839
4 HIREDATE 02-APR-81
4 SAL 2975
RUW_NUMBER COLUMN_NAME COLUMN_VAL
---------- -------------------- --------------------
4 COMM
4 DEPTNO 20
4 DIV 10
5 EMPNO 7654
5 ENAME MARTIN
5 JOB SALESMAN
5 MGR 7698
5 HIREDATE 28-SEP-81
5 SAL 1250
5 COMM 1400
5 DEPTNO 30
RUW_NUMBER COLUMN_NAME COLUMN_VAL
---------- -------------------- --------------------
5 DIV 10
6 EMPNO 7698
6 ENAME BLAKE
6 JOB MANAGER
6 MGR 7839
6 HIREDATE 01-MAY-81
6 SAL 2850
6 COMM
6 DEPTNO 30
6 DIV 10
7 EMPNO 7782
RUW_NUMBER COLUMN_NAME COLUMN_VAL
---------- -------------------- --------------------
7 ENAME CLARK
7 JOB MANAGER
7 MGR 7839
7 HIREDATE 09-JUN-81
7 SAL 2450
7 COMM
7 DEPTNO 10
7 DIV 10
8 EMPNO 7788
8 ENAME SCOTT
8 JOB ANALYST
RUW_NUMBER COLUMN_NAME COLUMN_VAL
---------- -------------------- --------------------
8 MGR 7566
8 HIREDATE 19-APR-87
8 SAL 3000
8 COMM
8 DEPTNO 20
8 DIV 10
9 EMPNO 7839
9 ENAME KING
9 JOB PRESIDENT
9 MGR
9 HIREDATE 17-NOV-81
RUW_NUMBER COLUMN_NAME COLUMN_VAL
---------- -------------------- --------------------
9 SAL 5000
9 COMM
9 DEPTNO 10
9 DIV 10
10 EMPNO 7844
10 ENAME TURNER
10 JOB SALESMAN
10 MGR 7698
10 HIREDATE 08-SEP-81
10 SAL 1500
10 COMM 0
RUW_NUMBER COLUMN_NAME COLUMN_VAL
---------- -------------------- --------------------
10 DEPTNO 30
10 DIV 10
11 EMPNO 7876
11 ENAME ADAMS
11 JOB CLERK
11 MGR 7788
11 HIREDATE 23-MAY-87
11 SAL 1100
11 COMM
11 DEPTNO 20
11 DIV 10
RUW_NUMBER COLUMN_NAME COLUMN_VAL
---------- -------------------- --------------------
12 EMPNO 7900
12 ENAME JAMES
12 JOB CLERK
12 MGR 7698
12 HIREDATE 03-DEC-81
12 SAL 950
12 COMM
12 DEPTNO 30
12 DIV 10
13 EMPNO 7902
13 ENAME FORD
RUW_NUMBER COLUMN_NAME COLUMN_VAL
---------- -------------------- --------------------
13 JOB ANALYST
13 MGR 7566
13 HIREDATE 03-DEC-81
13 SAL 3000
13 COMM
13 DEPTNO 20
13 DIV 10
14 EMPNO 7934
14 ENAME MILLER
14 JOB CLERK
14 MGR 7782
RUW_NUMBER COLUMN_NAME COLUMN_VAL
---------- -------------------- --------------------
14 HIREDATE 23-JAN-82
14 SAL 1300
14 COMM
14 DEPTNO 10
14 DIV 10
126 rows selected.
SQL>
Thank you
Knani.
Published by: Karthick_Arp on September 23, 2008 12:11 AM
Tags: Database
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Type global temporary Tables vs. table
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It is the most effective way.
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