With the help of SCORE on top of view with UNION

Hi guys,.

I explain what I'm trying to do it quickly:

2 tables: table1 and table2 with the same structure and have both a multi_column_datastore ctxsys.context.

1 view: View1

Select * from table1

Union

Select * from table2

If I run:

Select * from View1 WHERE contains (view1. Column1, '% textext %', 1) > 0;

It works fine, I get the correct result.

If I try to use the PARTITION function, I got an error:

Select * from View1 WHERE contains (view1. Column1, '% textext %', 1) > 0 ORDER by SCORE (1);

ORA-29921: auxiliary operator not supported with query to configure block

I understand the problem is in the UNION inside the view, is it possible to keep work, filtering the VIEW?

Thanks in advance

There is no score in the view, so you cannot reference the score when you query the view.  In order to put the note in the view, you need a contains the clause, which requires a value.  A method to do this is to use sys_context.  Please see the reproduction of the problem and solution below.

Scott@orcl12c >-reproduction of the problem:

Scott@orcl12c > create the table1 table:

2 (column1 varchar2 (30))

3.

Table created.

Scott@orcl12c > insert into table1 values ('textext")

2.

1 line of creation.

Scott@orcl12c > create table table2

2 (column1 varchar2 (30))

3.

Table created.

Scott@orcl12c > insert into table2 values ('textext")

2.

1 line of creation.

Scott@orcl12c > start

2 ctx_ddl.create_preference ('test_ds', 'multi_column_datastore');

3 ctx_ddl.set_attribute ('test_ds', 'columns', "column1");

4 end;

5.

PL/SQL procedure successfully completed.

Scott@orcl12c > create index table1_idx on table1 (column1)

2 indextype is ctxsys.context

3 parameters ("test_ds of the data store")

4.

The index is created.

Scott@orcl12c > create index table2_idx on the table2 (column1)

2 indextype is ctxsys.context

3 parameters ("test_ds of the data store")

4.

The index is created.

Scott@orcl12c > create or replace view View1

2 as

3 select * from table1

4 union

5 select * from table2

6.

Created view.

Scott@orcl12c > select * from View1 where contains (view1.column1, '% textext %', 1) > 0

2.

COLUMN1

------------------------------

textext

1 selected line.

Scott@orcl12c > select * from View1 where contains > 0 (view1.column1,'%textext%',1) order by score (1)

2.

Select * from View1 where contains > 0 (view1.column1,'%textext%',1) order by score (1)

*

ERROR on line 1:

ORA-29921: auxiliary operator not supported with query to configure block

Scott@orcl12c >-solution:

Scott@orcl12c > create or replace view View1

2 as

3. Select the partition (1) score, table1.* from table1

4 where contains (table1. Column1, sys_context ('text_query', 'query_value'), 1) > 0

5 union

6 select score partition (1), table2.* from table2

7 where contains (table2.column1, sys_context ('text_query', 'query_value'), 1) > 0

8.

Created view.

Scott@orcl12c > create or replace context text_query using text_proc

2.

Context that is created.

Scott@orcl12c > create or replace procedure text_proc

2 (p_val in varchar2)

3 as

4 start

5 dbms_session.set_context ('text_query', "query_value", p_val);

6 end text_proc;

7.

Created procedure.

Scott@orcl12c > text_proc exec ('% textext %')

PL/SQL procedure successfully completed.

Scott@orcl12c > set autotrace on explain

Scott@orcl12c > select * from View1 by score

2.

MARK THE COLUMN1

---------- ------------------------------

3 textext

1 selected line.

Execution plan

----------------------------------------------------------

Hash value of plan: 4090246122

----------------------------------------------------------------------------------------------

| ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |

----------------------------------------------------------------------------------------------

|   0 | SELECT STATEMENT |            |     2.    60.     8 (0) | 00:00:01 |

|   1.  SORT ORDER BY |            |     2.    60.     8 (0) | 00:00:01 |

|   2.   VIEW                          | VIEW1.     2.    60.     8 (0) | 00:00:01 |

|   3.    UNIQUE FATE |            |     2.    58.     8 (50) | 00:00:01 |

|   4.     UNION-ALL |            |       |       |            |          |

|   5.      TABLE ACCESS BY INDEX ROWID | TABLE1.     1.    29.     4 (0) | 00:00:01 |

|*  6 |       DOMAIN INDEX | TABLE1_IDX |       |       |     4 (0) | 00:00:01 |

|   7.      TABLE ACCESS BY INDEX ROWID | TABLE2.     1.    29.     4 (0) | 00:00:01 |

|*  8 |       DOMAIN INDEX | TABLE2_IDX |       |       |     4 (0) | 00:00:01 |

----------------------------------------------------------------------------------------------

Information of predicates (identified by the operation identity card):

---------------------------------------------------

6 - access("CTXSYS".") CONTAINS "(" TABLE1".»)" Column1', SYS_CONTEXT ('text_query ',' query_v)

Alou '), 1) > 0)

8 - access("CTXSYS".") CONTAINS "(" TABLE2".»)" Column1', SYS_CONTEXT ('text_query ',' query_v)

Alou '), 1) > 0)

Note

-----

-the dynamic statistics used: dynamic sampling (level = 2)

Scott@orcl12c >

Tags: Database

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