Oracle PL/SQL Tutorial/System Tables Data Dictionary/user ind columns

Getting Information on the Indexes on a Column

You can get information on the indexes on a column by querying user_ind_columns.

SQL> desc user_ind_columns;
 Name                    Null?    Type
 ------------------------
 INDEX_NAME                       VARCHAR2(30)
 TABLE_NAME                       VARCHAR2(30)
 COLUMN_NAME                      VARCHAR2(4000)
 COLUMN_POSITION                  NUMBER
 COLUMN_LENGTH                    NUMBER
 CHAR_LENGTH                      NUMBER
 DESCEND                          VARCHAR2(4)

Output report for user_ind_columns

SQL>
SQL>
SQL> CREATE TABLE DEPT (DEPTNO NUMBER(2),DNAME VARCHAR2(14),LOC VARCHAR2(13) );
Table created.
SQL>
SQL> INSERT INTO DEPT VALUES (10, "ACCOUNTING", "NEW YORK");
1 row created.
SQL> INSERT INTO DEPT VALUES (20, "RESEARCH", "DALLAS");
1 row created.
SQL> INSERT INTO DEPT VALUES (30, "SALES", "CHICAGO");
1 row created.
SQL> INSERT INTO DEPT VALUES (40, "OPERATIONS", "BOSTON");
1 row created.
SQL>
SQL> create or replace procedure desc_table( p_tname in varchar2 ) AUTHID CURRENT_USER as
  2  begin
  3      dbms_output.put_line(p_tname );
  4      for z in ( select a.index_name, a.uniqueness from user_indexes a where a.table_name = upper(p_tname) and index_type = "NORMAL" )
  5      loop
  6          dbms_output.put( rpad(z.index_name,31) ||z.uniqueness );
  7          for y in ( select decode(column_position,1,"(",", ")|| column_name column_name
  8              from user_ind_columns b
  9             where b.index_name = z.index_name
 10             order by column_position )
 11          loop
 12              dbms_output.put( y.column_name );
 13          end loop;
 14          dbms_output.put_line( ")" || " " );
 15      end loop;
 16
 17  end;
 18  /
Procedure created.
SQL>
SQL> grant execute on desc_table to public
  2  /
Grant succeeded.
SQL>
SQL> set serveroutput on format wrapped
SQL> exec desc_table( "dept" )
dept
PL/SQL procedure successfully completed.
SQL>
SQL>
SQL> drop table dept;
Table dropped.
SQL>

Query table_name,index_name, index.uniqueness,index.status by joining user_indexes and user_ind_columns

SQL>
SQL> CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL,
  2                    ENAME VARCHAR2(10),
  3                    JOB VARCHAR2(9),
  4                    MGR NUMBER(4),
  5                    HIREDATE DATE,
  6                    SAL NUMBER(7, 2),
  7                    COMM NUMBER(7, 2),
  8                    DEPTNO NUMBER(2));
Table created.
SQL>
SQL> INSERT INTO EMP VALUES (7369, "SMITH", "CLERK",    7902, TO_DATE("17-DEC-1980", "DD-MON-YYYY"), 800, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7499, "ALLEN", "SALESMAN", 7698, TO_DATE("20-FEB-1981", "DD-MON-YYYY"), 1600, 300, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7521, "WARD",  "SALESMAN", 7698, TO_DATE("22-FEB-1981", "DD-MON-YYYY"), 1250, 500, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7566, "JONES", "MANAGER",  7839, TO_DATE("2-APR-1981",  "DD-MON-YYYY"), 2975, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7654, "MARTIN", "SALESMAN", 7698,TO_DATE("28-SEP-1981", "DD-MON-YYYY"), 1250, 1400, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7698, "BLAKE", "MANAGER", 7839,TO_DATE("1-MAY-1981", "DD-MON-YYYY"), 2850, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7782, "CLARK", "MANAGER", 7839,TO_DATE("9-JUN-1981", "DD-MON-YYYY"), 2450, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7788, "SCOTT", "ANALYST", 7566,TO_DATE("09-DEC-1982", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7839, "KING", "PRESIDENT", NULL,TO_DATE("17-NOV-1981", "DD-MON-YYYY"), 5000, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7844, "TURNER", "SALESMAN", 7698,TO_DATE("8-SEP-1981", "DD-MON-YYYY"), 1500, 0, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7876, "ADAMS", "CLERK", 7788,TO_DATE("12-JAN-1983", "DD-MON-YYYY"), 1100, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7900, "JAMES", "CLERK", 7698,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 950, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7902, "FORD", "ANALYST", 7566,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7934, "MILLER", "CLERK", 7782,TO_DATE("23-JAN-1982", "DD-MON-YYYY"), 1300, NULL, 10);
1 row created.
SQL>
SQL> CREATE TABLE DEPT (DEPTNO NUMBER(2),DNAME VARCHAR2(14),LOC VARCHAR2(13) );
Table created.
SQL>
SQL> INSERT INTO DEPT VALUES (10, "ACCOUNTING", "NEW YORK");
1 row created.
SQL> INSERT INTO DEPT VALUES (20, "RESEARCH", "DALLAS");
1 row created.
SQL> INSERT INTO DEPT VALUES (30, "SALES", "CHICAGO");
1 row created.
SQL> INSERT INTO DEPT VALUES (40, "OPERATIONS", "BOSTON");
1 row created.
SQL>
SQL> select   table_name
  2  ,        index_name
  3  ,        i.uniqueness as unq
  4  ,        i.status
  5  ,        ic.column_name
  6  from     user_indexes     i  join
  7           user_ind_columns ic using (table_name,index_name)
  8  where    table_name in ("EMPLOYEES","DEPARTMENTS")
  9  order by table_name
 10  ,        index_name
 11  ,        unq
 12  ,        ic.column_position;
no rows selected
SQL>
SQL> drop table emp;
Table dropped.
SQL> drop table dept;
Table dropped.
SQL>

user_indexes join user_ind_columns ic using (table_name,index_name)

SQL>
SQL>
SQL>
SQL> col table_name  format a15
SQL> col index_name  format a15
SQL> col unq         format a9
SQL> col column_name format a15
SQL>
SQL> set linesize 80
SQL>
SQL> break on table_name skip 1 -
>       on index_name        -
>       on unq               -
>       on status
SQL>
SQL> select   table_name
  2  ,        index_name
  3  ,        i.uniqueness as unq
  4  ,        i.status
  5  ,        ic.column_name
  6  from     user_indexes     i  join
  7           user_ind_columns ic using (table_name,index_name)
  8  where    table_name in ("EMP","DEPARTMENTS")
  9  order by table_name
 10  ,        index_name
 11  ,        unq
 12  ,        ic.column_position;
no rows selected
SQL>
SQL> --clear breaks
SQL>