Evaluation order of setting using the Table of Interface EPMA

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• Retrieve and display a result set using the dynamic sql?

  Hi all
  
  How would display a result set in Oracle using the dynamic SQL? Reason being, the table where I'd retrieve and display the result set is a GLOBAL TEMP TABLE created in a stored procedure. If I try to use the loop as usual, the compiler complains that the table does not exist. This makes sense because the compiler does not recognize the table because it is created dynamically. Here is an example:
  
  create or replace PROCEDURE maketemptab IS
  sql_stmt VARCHAR2 (500);
  OutputString VARCHAR2 (50);
  
  BEGIN
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  In short, how to rewrite the SQL below the comment "to display the result set" using the dynamic sql?
  
  Thank you
  Amedeo.

  Hello

  Try this:

  CREATE OR REPLACE PROCEDURE maketemptab IS
     sql_stmt     VARCHAR2(500);
     outputstring VARCHAR2(50);
     v_cursor     SYS_REFCURSOR;
     v_col1       VARCHAR2(30);
  BEGIN
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     EXECUTE IMMEDIATE sql_stmt;
     dbms_output.put_line('...row inserted');
  
     -- insert row into temp table
     sql_stmt := 'INSERT INTO globtemptab values (2, ''some more test data'')';
     EXECUTE IMMEDIATE sql_stmt;
     dbms_output.put_line('...row inserted');
  
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     EXECUTE IMMEDIATE sql_stmt
        INTO outputstring;
     dbms_output.put_line('...row selected: ' || outputstring);
  
     OPEN v_cursor FOR 'SELECT col1 FROM globtemptab';
  
     LOOP
        FETCH v_cursor
           INTO v_col1;
        EXIT WHEN v_cursor%NOTFOUND;
        dbms_output.put_line('...test data retrieved is' || v_col1);
     END LOOP;
     CLOSE v_cursor;
  
     -- drop temp table
     sql_stmt := 'DROP TABLE globtemptab';
     EXECUTE IMMEDIATE sql_stmt;
     dbms_output.put_line('...table dropped');
  END;
  /
  

  Kind regards

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• Can I get the total number of records that meet the conditions of a query using the Table API?

  Hello

  A < row > TableIterator is returned when I ask operations using the index of tables. If I want to get the total number of records, I count one by one using the returned TableIterator < row >.

  
  

  Can I get the total number of records directly meets the conditions of the query?

  I can get the total number of records directly the request of the meeting of the conditions of CLI using the command Global table - name tableName - count - index index-name-field fieldName - start startValue-end endValue.

  Can I get the same results using the Table API?

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  Hello

  Counting records in a database is a tricky thing.  Any system that gives you an accurate count of the records will have a hotspot of concurrency on updates, namely the place where the counting is maintained.  Such a count is a problem of performance in addition to competitive access problem.   The problem is even more difficult in a system widely distributed such a NoSQL database.

  The CLI has overall command that counts, but does so by brutal force - iterate keys that correspond to the parameters of the operation.  This is how you must do this within the API.  There is not a lot of code, but you have to write.  You certainly want to use TableIterator TableAPI.tableKeysIterator (), because a key iteration is significantly faster than the iteration of lines.  Just one iteration and count.

  If you use TableAPI.multiGet () and a key with a touch of brightness full then, in fact, count the results as they are returned in a single piece (a list).

  Kind regards

  George

• Using the table as a MATLAB script for entry into a Subvi - labview crashes

  Hello

  I have problems in creating a Subvi, which includes a matlab file that has a table as input.

  I created a VI, who runs a simple matlab script, with a table as an input and a table as output. It worked well, until I assigned the terminals in order to to use as a Subvi.

  After that the terminals have been assigned, labview crashes instantly when you run the file.

  I also created a VI to test the Subvi, but I couldn't make it work at all, labview always crashed...

  Does anyone know a solution to my problem? They only thing I can think is to not use it as a Subvi, but then my master file will get huge as all the matlab code would be in there...

  attached are two files, so that you can better understand my problem. (test_... is the main file)

  any help will be greatly appreciated!

  -Jarno

  Edit: I'm using labview in 2013 with windows 7 and matlab 2014

  Hey, Jarno,.

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  Kind regards

  chazzzmd78

  Honestly, a Select System / box is the wrong choice for what you do.  I'd go with the prerequisite options.  It reduces the number of steps of TestStand.

  In your case you just to see whether something exists or not in a table.  Ideally, you will use the Select operations / box when you have 1 selected option of many.  I suppose you're a loop around the case select so that you can run all the tests so that your code looks something like this:

  For N (N is the number of tests they have selected)

  Select Locals.ArrayOfNumbers

  Briefcase (Locals.ArrayOfNumbers, 1).

  Run test 1

  Briefcase (Locals.ArrayOfNumbers, 2)

  Run the test 2

  Select close

  Closing loop

  If you want to use the Select option / box correctly I would like this:

  Item ForEach in Locals.ArrayOfNumbers (assign the item being Locals.i)

  Select Locals.i

  Case 1

  Run test 1

  Case 2

  Run the test 2

  Select close

  Close ForEach

  I hope that makes more sense.  If you have any questions let me know.

  Kind regards

• Authentication using the table and the existing database

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• Help setting up the table/list of choices

  Hello:
  
  I create an application where I use a custom authentication scheme and captures all user information in a separate table. When the user logs in he will refer to the table to identify a user name and password stored in the table.
  
  I am allowing users to create their own user accounts that will be default to basic access levels. Further along in the process, users will need to select a person to approve something. I want to use a list of choices so that the name of the approver is entered regularly every time. The user table has the following format:
  
  Default primary key Type Nullable data column name
  Username VARCHAR2 (8) No - 1
  PASSWORD VARCHAR2 (8) No. -
  FNAME VARCHAR2 (30) - No.
  LNAME VARCHAR2 (30) - No.
  E-MAIL VARCHAR2 (50) - No.
  ADMIN VARCHAR2 (1) Yes.
  APPROVER VARCHAR2 (1) Yes.
  
  
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  Furthermore, I would like to (if possible) to keep the two separate fields for the creation of user accounts so that I can get a coherent LNAME, FNAME format and people are not go backwards (e.g., Smith, Joe c. Joe Smith).
  
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  Thanks for any help you can provide.

  RKD,

  Create a dynamic list of values.

  select lname||', '||fname displayed, username returned
  from user
  order by 1
  

  You can view what you want, regardless of the value returned. And that includes the concatenation of elements together (or do other calculations/manipulations).

  -David

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  SQL> create table t_11 as select rownum a, rpad('x',100,'x') b from dual connect by rownum<100;
   
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  SQL> delete t_11 where a<65;
   
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  ------------------------------ ----------
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                          121355         33
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  ------------------------------ ----------
                          121354          2
                          121355         33
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  SQL> select dbms_rowid.rowid_block_number(rowid),count(*) from t_11 group by dbms_rowid.rowid_block_number(rowid);
   
  DBMS_ROWID.ROWID_BLOCK_NUMBER(   COUNT(*)
  ------------------------------ ----------
                          121354         37
                          121355         33
   

  A solution that is not quite perfect - alter table XXX pctfree, pctused 99 1.
  Unless your beginning of lines off incredibly short it will probably limit you to one line per block for the future DML.

  As a guideline for "ranks shortcuts" (and this may vary slightly depending on whether you use SAMS or not):

  SQL> insert into t1 values(rpad('x',42));
  
  1 row created.
  
  SQL> insert into t1 values(rpad('x',1));
  
  1 row created.
  
  SQL> select rowid from t1;
  
  ROWID
  ------------------
  AAAY2bAAFAAAA4KAAA
  AAAY2bAAFAAAA4LAAA
  

  Your analysis of the rows_per_block is not quite right — but the critical point is correct, it is very difficult to get the recorded "records per block" reduced once you have data in place. Here is an improved version of your test cut-n-pasted from a SQL * Plus term in 10.2.0.3:

  SQL> @temp
  SQL> set echo on
  SQL>
  SQL> drop table t_11;
  
  Table dropped.
  
  SQL>
  SQL> create table t_11 as select rownum a, rpad('x',100,'x') b from dual connect by rownum<100;
  
  Table created.
  
  SQL>
  SQL> select dbms_rowid.rowid_block_number(rowid),count(*) from t_11 group by dbms_rowid.rowid_block_number(rowid);
  
  DBMS_ROWID.ROWID_BLOCK_NUMBER(ROWID)   COUNT(*)
  ------------------------------------ ----------
                                  5642         66
                                  5643         33
  
  2 rows selected.
  
  SQL>
  SQL> delete t_11 where a between 31 and 70;
  
  40 rows deleted.
  
  SQL>
  SQL> select dbms_rowid.rowid_block_number(rowid),count(*) from t_11 group by dbms_rowid.rowid_block_number(rowid);
  
  DBMS_ROWID.ROWID_BLOCK_NUMBER(ROWID)   COUNT(*)
  ------------------------------------ ----------
                                  5642         30
                                  5643         29
  
  2 rows selected.
  
  SQL>
  SQL> alter table t_11 minimize records_per_block;
  
  Table altered.
  
  SQL>
  SQL> select dbms_rowid.rowid_block_number(rowid),count(*) from t_11 group by dbms_rowid.rowid_block_number (rowid);
  
  DBMS_ROWID.ROWID_BLOCK_NUMBER(ROWID)   COUNT(*)
  ------------------------------------ ----------
                                  5642         30
                                  5643         29
  
  2 rows selected.
  
  SQL>
  SQL> insert into t_11 select * from t_11 where rownum<100;
  
  59 rows created.
  
  SQL>
  SQL> select dbms_rowid.rowid_block_number(rowid),count(*) from t_11 group by dbms_rowid.rowid_block_number(rowid);
  
  DBMS_ROWID.ROWID_BLOCK_NUMBER(ROWID)   COUNT(*)
  ------------------------------------ ----------
                                  5644         33
                                  5642         33
                                  5643         33
                                  5645         19
  
  4 rows selected.
  
  SQL> spool off
  

  I delete the last lines 36 to one block and the first 4 lines on the other. For this reason, Oracle is capable (on the block drain plug) to reduce the size of the + 'line directory' + in the first block by removing the pointers 'empty' to the end of the book - but it cannot eliminate all entries in the directory of the line of the second block because the "empty" pointers are not at the end of the directory.

  Code to determine the limit on the number of lines per block looks like the size of the largest directory online - not the current number of rows in the block.

  In my example, the largest directory of line is 33 because the last 34 entries have been pruned at the end; in your example, the largest directory of line was still 67 because your deletion had left two rows at the end of the directory.

  Concerning
  Jonathan Lewis
  http://jonathanlewis.WordPress.com
  http://www.jlcomp.demon.co.UK

  "Science is more than a body of knowledge; It's a way of thinking. "
  Carl Sagan