Dynamic SQL is a valid option?

Hello

I have question on insertion I have a large amount of lines that I want to insert into a table. Insert rows are like;

001 09 00 FF
001 09 FF 11
FF 00 11 001
001 00 01 00

There are four types of conditions. Only the last condition can be inserted, while the rest cannot be inserted (in other words, on four columns to all who have the value 'FF' must not be inserted).

I wanted to use a simple constraint checking, but our DBA is not agree on this. The reason is that overall with many conditions will create a problem with the database-level locking.

Now, I think to use dynamic SQL and the place of the condition in the WHERE clause. I think right and make any sense?

I think I have to be aware of performance because there will be a mass insertion.

Published by: uk113 on July 28, 2009 06:03

In fact, I agree with kind of your DBA, but not his reasons. A check against the content of a column constraint will not cause a locking more in the database column without constraint. If you update a row in the table, Oracle will have a lock on the rows updated if they are limited or not. A newly inserted row never "locked" because it is no longer visible in the session that he introduced to the validation of this session.

You say "I have a lot of lines that I want to insert into a table" which implies to me that you have the source data in an accessible form electronically, which means you can do single insertion as a SQL statement. As many others have suggested, I would use a predicate on each of the columns that cannot contain FF to remove these rows from the result set that you will use to make the insertion.

Given the constraints on the table for a loading block, particulalry if you know you will have a fairly large number of rows in your data source, which will infringe the constraint actually will force you in a row by row (or bulk collect bulk collect) scenario so that you can catch constraint violations and throw these lines. Although you can still use a predicate to filter the lines that would not allow the validation.

If you need constraints after loading mass will depend on whether or not you expect to get new data in the table, and how it will be inserted or updated. If new data come mainly from single row inserts and updates (for example from the application screen), then I would certainly limit the columns to allow not FF. If you do only loads in bulk, I would add probably not these constraints. If you are likely to have a mix of bulk and individual tips, I add the constraints, but still have a predicate in loads in bulk to filter incorrect records.

John

Tags: Database

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    5 p_rec in r_type,
    6 p_out out varchar2
    7                  )
    8 is
    9 start
    10 p_out: = "ID = ' |" p_rec.ID | 'Name =' | p_rec. Name;
    11 end;
    12 end;
    13.

    Package body created.

    SQL >

    On local db:

    SQL > set serveroutput on
    SQL > declare
    v_rec 2 pkg.r_type@pdb1sol12;
    3 v_out varchar2 (50);
    4 start
    v_rec.ID 5: = 1;
    6 v_rec.name: = 'XXX ';
    7 immediate execution"
    8                        begin
    9 pkg.p@pdb1sol12 (: 1,: 2);
    10                        end;'
    11 using v_rec,
    12 v_out;
    13 dbms_output.put_line (v_out);
    14 end;
    15.
    using v_rec;
    *
    ERROR on line 11:
    ORA-06550: line 11, column 20:
    PLS-00457: expressions must be SQL types
    ORA-06550: line 7, column 5:
    PL/SQL: Statement ignored

    SQL > declare
    2 number of v_id: = 1;
    3 v_name varchar2 (10): = 'XXX ';
    4 v_out varchar2 (50);
    5. start
    6 immediate execution"
    7 report
    8 v_rec pkg.r_type@pdb1sol12.
    9                        begin
    10                            v_rec.id  := :1;
    11 v_rec.name: =: 2;
    12 pkg.p@pdb1sol12 (v_rec,: 3);
    13                        end;'
    14 using v_id,
    15 in v_name,
    16 v_out;
    17 dbms_output.put_line (v_out);
    18 end;
    19.
    ID = 1 name = XXX

    PL/SQL procedure successfully completed.

    SQL >

    SY.

  • dynamic SQL

    Is Hi possible to create dynamic sql statements to create a select statement

    for example I have table with 50 lines, I need to contract a statemnt for all columns selection how can I do this Dynamics

    Hi Alex,

    Start with something like this

    select 'select '
    || LISTAGG(column_name, ', ') within GROUP (ORDER BY COLUMN_ID )
    || ' from ' || table_name || ';' as "-- select statement"
  from user_tab_columns
 where table_name like upper ( '&1' )
 group by table_name;

    concerning
    Kay

  • How the date can be filled with timestamp in dynamic sql

    Hi all

    Below we have sql

    v_stmt: = ' MERGE IN MTH_EQUIPMENTS_EXT_B ED

    WITH THE HELP OF)

    SELECT TAG_DATA,

    EQUIPMENT_FK_KEY,

    WORKORDER_FK_KEY,

    SEGMENT_FK_KEY,

    SHIFT_WORKDAY_FK_KEY,

    HOUR_FK_KEY,

    ITEM_FK_KEY,

    READ_TIME,

    ATTR_GROUP_ID,

    RECIPE_NUM,

    RECIPE_VERSION,

    NVL (FND_GLOBAL. User_Id,-1) l_updated_by,.

    NVL (FND_GLOBAL. Login_Id,-1) l_last_update_login

    OF MTH_TAG_READINGS_T_STG

    WHERE DB_COL = ' | " ' || v_colname | " ' ||') TS

    WE (';)

    v_stmt: = v_stmt | "ED. EQUIPMENT_PK_KEY = TS. EQUIPMENT_FK_KEY AND

    ED. READ_TIME = TS. READ_TIME AND

    ED. ATTR_GROUP_ID = TS. ATTR_GROUP_ID)

    WHEN MATCHED THEN

    UPDATE

    GAME ED.'. v_colname |' = TS. TAG_DATA,

    ED. LAST_UPDATED_BY = 1, ";

    v_stmt: = v_stmt | "ED. LAST_UPDATE_LOGIN = TS.l_last_update_login

    WHEN NOT MATCHED THEN

    INSERT ('| v_colname |', EXTENSION_ID, EQUIPMENT_PK_KEY, WORKORDER_FK_KEY, SEGMENT_FK_KEY, SHIFT_WORKDAY_FK_KEY, HOUR_FK_KEY, ITEM_FK_KEY, READ_TIME, ATTR_GROUP_ID, LAST_UPDATE_DATE, LAST_UPDATED_BY,';)

    v_stmt: =.

    v_stmt | ("LAST_UPDATE_LOGIN, CREATED_BY, CREATION_DATE, RECIPE_NUM, RECIPE_VERSION)

    VALUES (TS. TAG_DATA, EGO_EXTFWK_S.NEXTVAL, TS. EQUIPMENT_FK_KEY, TS. WORKORDER_FK_KEY, TS. SEGMENT_FK_KEY, TS. SHIFT_WORKDAY_FK_KEY, TS. HOUR_FK_KEY, TS. ITEM_FK_KEY, TS. READ_TIME,';

    v_stmt: = v_stmt | "TS. ATTR_GROUP_ID,' | '''|| SYSDATE | "'| ', 1, TS.l_last_update_login, TS.l_updated_by,'|"' | SYSDATE | " ' ||', TS. RECIPE_NUM, TS. RECIPE_VERSION)';

    EXECUTE IMMEDIATE v_stmt;

    After you run the above SQL last date of update in MTH_EQUIPMENST_EXT_B is filled with sysdate but timestamp is not its always 00:00:00. Can we have timestamp also populated through dynamic sql in the last update date

    Kind regards

    Amrit

    Values to hardcode in the dynamic SQL - never use bind variables:

    v_stmt: = ' MERGE IN MTH_EQUIPMENTS_EXT_B ED

    WITH THE HELP OF)

    SELECT TAG_DATA,

    EQUIPMENT_FK_KEY,

    WORKORDER_FK_KEY,

    SEGMENT_FK_KEY,

    SHIFT_WORKDAY_FK_KEY,

    HOUR_FK_KEY,

    ITEM_FK_KEY,

    READ_TIME,

    ATTR_GROUP_ID,

    RECIPE_NUM,

    RECIPE_VERSION,

    NVL (FND_GLOBAL. User_Id,-1) l_updated_by,.

    NVL (FND_GLOBAL. Login_Id,-1) l_last_update_login

    OF MTH_TAG_READINGS_T_STG

    WHERE DB_COL =: 1) TS

    WE (';)

    v_stmt: = v_stmt | "ED. EQUIPMENT_PK_KEY = TS. EQUIPMENT_FK_KEY AND

    ED. READ_TIME = TS. READ_TIME AND

    ED. ATTR_GROUP_ID = TS. ATTR_GROUP_ID)

    WHEN MATCHED THEN

    UPDATE

    GAME ED.'. v_colname |' = TS. TAG_DATA,

    ED. LAST_UPDATED_BY = 1, ";

    v_stmt: = v_stmt | "ED. LAST_UPDATE_LOGIN = TS.l_last_update_login

    WHEN NOT MATCHED THEN

    INSERT ('| v_colname |', EXTENSION_ID, EQUIPMENT_PK_KEY, WORKORDER_FK_KEY, SEGMENT_FK_KEY, SHIFT_WORKDAY_FK_KEY, HOUR_FK_KEY, ITEM_FK_KEY, READ_TIME, ATTR_GROUP_ID, LAST_UPDATE_DATE, LAST_UPDATED_BY,';)

    v_stmt: =.

    v_stmt | ("LAST_UPDATE_LOGIN, CREATED_BY, CREATION_DATE, RECIPE_NUM, RECIPE_VERSION)

    VALUES (TS. TAG_DATA, EGO_EXTFWK_S.NEXTVAL, TS. EQUIPMENT_FK_KEY, TS. WORKORDER_FK_KEY, TS. SEGMENT_FK_KEY, TS. SHIFT_WORKDAY_FK_KEY, TS. HOUR_FK_KEY, TS. ITEM_FK_KEY, TS. READ_TIME,';

    v_stmt: = v_stmt | "TS. ATTR_GROUP_ID,: 2, 1, TS.l_last_update_login, TS.l_updated_by,: 3, TS. RECIPE_NUM, TS. RECIPE_VERSION)';

    V_stmt EXECUTE IMMEDIATE

    With the HELP of v_colname,.

    SYSDATE,

    SYSDATE;

    SY.

  • How to extract the names of columns in dynamic SQL

    Hi all

    Is it possible to extract all the names of columns in a dynamic query?

    In my case according to the user selections that my query will get changed (number of the column, column name and tables that everything can vary).

    So now, is it possible to retrieve all the column names of the dynamic query generated?

    I am using Oracle 11g (11.2.0.4)

    Thank you

    Shaz

    Re: Dynamic Extraction on dynamic Sql

  • How to get sql % number of dynamic sql code lines

    Hello

    In this procedure I'm inserting and updating using dynamic sql. Now I want to go back two more PARAMETERS, the parameter should be back the number of lines inserted and how updated by stmtas of UPDATE as well as an INSERT. I'm not able to do can help you on that?

    CREATE OR REPLACE PROCEDURE Sp_Array_Test( PV_TGT_NAME   IN  VARCHAR2,
                                           PV_SRC_NAME   IN  VARCHAR2,
                                           PV_PK_COLS    IN  VARCHAR2,
                                           PN_ERR_CD     OUT NUMBER,
                                           PN_ERR_MSG    OUT VARCHAR2)
AS


TYPE ARR_TAB IS TABLE OF VARCHAR2(4000) INDEX BY BINARY_INTEGER;


--UTL_FP        UTL_FILE.FILE_TYPE;
LV_AN_



BLOCK   VARCHAR2(32767);
LN_CUR        BINARY_INTEGER := DBMS_SQL.OPEN_CURSOR;
LN_DESC       DBMS_SQL.DESC_TAB;
LN_COL_CNT    PLS_INTEGER := 0;
LV_SEL_UPD_STMT   VARCHAR2(4000);
LV_SEL_INS_STMT   VARCHAR2(4000);
ARR_INDX      NUMBER := 1;
LV_DATA_TYPE  VARCHAR2(8);
LN_FIND_FLAG  NUMBER := 0;
LN_TAB        ARR_TAB;
LV_COLS_ARR   ARR_TAB;
LV_ERR_MSG    VARCHAR2(500);




--PROCEDURE FILE_WRITE ( FH_IN     IN UTL_FILE.FILE_TYPE,
--                STRING_IN IN VARCHAR2 ) IS
--BEGIN
--   UTL_FILE.PUT_LINE(FH_IN,STRING_IN);
--   LV_AN_BLOCK := LV_AN_BLOCK||STRING_IN;
--EXCEPTION
--   WHEN OTHERS THEN
--      RAISE;
--END FILE_WRITE;




BEGIN


--   UTL_FP := UTL_FILE.FOPEN('TEST_DIR', 'TEST.sql', 'W');


    LV_SEL_UPD_STMT := 'SELECT A.'||REPLACE(PV_PK_COLS,',','||A.')||' PK_COLS , A.* , B.ROWID FROM '||PV_SRC_NAME||' A, '||PV_TGT_NAME||' B WHERE ';


    LV_SEL_INS_STMT := 'SELECT A.* FROM '||PV_SRC_NAME||' A WHERE NOT EXISTS (SELECT ''1'' FROM '||PV_TGT_NAME||' B WHERE ';


    LN_TAB(ARR_INDX) := 'DECLARE ';
    ARR_INDX := ARR_INDX + 1;


    LN_TAB(ARR_INDX) := 'CURSOR CUR_VIEW_UPD IS '||LV_SEL_UPD_STMT ;
    ARR_INDX := ARR_INDX + 1;




    SELECT SUBSTR(COLS,DECODE(RN,1,1,INSTR(COLS,',',1,RN-1)+1),DECODE(RN,1,INSTR(COLS,',',1,RN)-1,INSTR(COLS,',',1,RN)-INSTR(COLS,',',1,RN-1)-1))
BULK COLLECT INTO LV_COLS_ARR
      FROM ( SELECT RN, PV_PK_COLS||',' COLS
               FROM (SELECT ROWNUM RN
                       FROM ALL_OBJECTS
                      WHERE ROWNUM <= LENGTH(PV_PK_COLS)- LENGTH(REPLACE(PV_PK_COLS,','))+1)) ;
    FOR K IN 1 .. LV_COLS_ARR.COUNT LOOP
        LV_SEL_UPD_STMT     := LV_SEL_UPD_STMT||' A.'||LV_COLS_ARR(K)||' = ';
        LN_TAB(ARR_INDX) := ' A.'||LV_COLS_ARR(K)||' = ';
        LV_SEL_UPD_STMT     := LV_SEL_UPD_STMT||' B.'||LV_COLS_ARR(K) ||CASE WHEN K = LV_COLS_ARR.COUNT THEN NULL ELSE ' AND ' END;
        LN_TAB(ARR_INDX) := LN_TAB(ARR_INDX)||' B.'||LV_COLS_ARR(K) ||CASE WHEN K = LV_COLS_ARR.COUNT THEN ' ;' ELSE ' AND ' END;
        ARR_INDX := ARR_INDX + 1;
    END LOOP;


    LN_TAB(ARR_INDX) := 'CURSOR CUR_VIEW_INS IS '||LV_SEL_INS_STMT ;
    ARR_INDX := ARR_INDX + 1;


    FOR K IN 1 .. LV_COLS_ARR.COUNT LOOP
        LV_SEL_INS_STMT     := LV_SEL_INS_STMT||' A.'||LV_COLS_ARR(K)||' = ';
        LN_TAB(ARR_INDX) := ' A.'||LV_COLS_ARR(K)||' = ';
        LV_SEL_INS_STMT     := LV_SEL_INS_STMT||' B.'||LV_COLS_ARR(K) ||CASE WHEN K = LV_COLS_ARR.COUNT THEN NULL ELSE ' AND ' END;
        LN_TAB(ARR_INDX) := LN_TAB(ARR_INDX)||' B.'||LV_COLS_ARR(K) ||CASE WHEN K = LV_COLS_ARR.COUNT THEN ' );' ELSE ' AND ' END;
        ARR_INDX := ARR_INDX + 1;
    END LOOP;




    LV_ERR_MSG := 'WHILE PARSING SELECT STATEMENT -- '||LV_SEL_UPD_STMT;
    DBMS_SQL.PARSE(LN_CUR, LV_SEL_UPD_STMT, DBMS_SQL.NATIVE);


    LV_ERR_MSG := 'WHILE DESCRIBING SELECT STATEMENT -- '||LV_SEL_UPD_STMT;
    DBMS_SQL.DESCRIBE_COLUMNS(LN_CUR, LN_COL_CNT, LN_DESC);






   FOR i IN LN_DESC.FIRST .. LN_DESC.LAST LOOP
      IF LN_DESC(i).col_type = 2 THEN
         LV_DATA_TYPE := 'NUMBER';
      ELSIF LN_DESC(i).col_type = 12 THEN
         LV_DATA_TYPE := 'DATE';
      ELSE
         LV_DATA_TYPE := 'VARCHAR2';
      END IF;
       LN_TAB(ARR_INDX) := '   T_'||LN_DESC(i).col_name||' DBMS_SQL.'||LV_DATA_TYPE||'_TABLE;';
       ARR_INDX := ARR_INDX + 1;
   END LOOP;






    LN_TAB(ARR_INDX) := 'BEGIN ';
    ARR_INDX := ARR_INDX + 1;
    LN_TAB(ARR_INDX) := '   EXECUTE IMMEDIATE ''ALTER SESSION SET NLS_DATE_FORMAT = ''''DD-MON-YYYY HH24:MI:SS'''''';';
    ARR_INDX := ARR_INDX + 1;
    LN_TAB(ARR_INDX) := '   OPEN CUR_VIEW_UPD;';
    ARR_INDX := ARR_INDX + 1;
    LN_TAB(ARR_INDX) := '   LOOP';
    ARR_INDX := ARR_INDX + 1;
    LN_TAB(ARR_INDX) := '      FETCH CUR_VIEW_UPD BULK COLLECT INTO T_'||LN_DESC(LN_DESC.FIRST).col_name||',';
    ARR_INDX := ARR_INDX + 1;
    FOR i IN LN_DESC.FIRST + 1 .. LN_DESC.LAST - 1 LOOP
      LN_TAB(ARR_INDX) := '                        T_'||LN_DESC(i).col_name||',';
      ARR_INDX := ARR_INDX + 1;
    END LOOP;
   LN_TAB(ARR_INDX) := '                        T_'||LN_DESC(LN_DESC.LAST).col_name||' LIMIT 500 ;';
   ARR_INDX := ARR_INDX + 1;
   LN_TAB(ARR_INDX) := '     FORALL I IN 1 .. '||'T_'||LN_DESC(LN_DESC.LAST).col_name||'.COUNT ';
   ARR_INDX := ARR_INDX + 1;
    LN_TAB(ARR_INDX) := '      UPDATE '||PV_TGT_NAME||' SET  ';
    ARR_INDX := ARR_INDX + 1;
    LN_FIND_FLAG := 0;
    FOR I IN LN_DESC.FIRST + 1 .. LN_DESC.LAST-1 LOOP
      FOR K IN 1 .. LV_COLS_ARR.COUNT LOOP
         LN_FIND_FLAG := 0;
         IF LN_DESC(I).COL_NAME = LV_COLS_ARR(K) THEN
            LN_FIND_FLAG := 1;
            EXIT;
         END IF;
      END LOOP;
      IF LN_FIND_FLAG = 0 THEN
        LN_TAB(ARR_INDX) := '                        '||LN_DESC(i).col_name||' = '||'T_'||LN_DESC(i).col_name||'(I)'||CASE WHEN I = LN_DESC.LAST-1 THEN ' WHERE ' ELSE ',' END;
        ARR_INDX := ARR_INDX + 1;
      END IF ;
    END LOOP;


   LN_TAB(ARR_INDX) := '                        ROWID = '||'T_'||LN_DESC(LN_DESC.LAST).col_name||'(I) ;';
   ARR_INDX := ARR_INDX + 1;


   LN_TAB(ARR_INDX) := '      COMMIT;';
   ARR_INDX := ARR_INDX + 1;


   LN_TAB(ARR_INDX) := '      EXIT WHEN CUR_VIEW_UPD%NOTFOUND;';
   ARR_INDX := ARR_INDX + 1;


   LN_TAB(ARR_INDX) := '   END LOOP;';
   ARR_INDX := ARR_INDX + 1;


   LN_TAB(ARR_INDX) := '   CLOSE CUR_VIEW_UPD;';
   ARR_INDX := ARR_INDX + 1;


   LN_TAB(ARR_INDX) := '      COMMIT;';
   ARR_INDX := ARR_INDX + 1;




    LN_TAB(ARR_INDX) := '   OPEN CUR_VIEW_INS;';
    ARR_INDX := ARR_INDX + 1;
    LN_TAB(ARR_INDX) := '   LOOP';
    ARR_INDX := ARR_INDX + 1;
    LN_TAB(ARR_INDX) := '      FETCH CUR_VIEW_INS BULK COLLECT INTO T_'||LN_DESC(LN_DESC.FIRST+1).col_name||',';
    ARR_INDX := ARR_INDX + 1;
    FOR i IN LN_DESC.FIRST + 2 .. LN_DESC.LAST - 2 LOOP
      LN_TAB(ARR_INDX) := '                        T_'||LN_DESC(i).col_name||',';
      ARR_INDX := ARR_INDX + 1;
    END LOOP;
   LN_TAB(ARR_INDX) := '                        T_'||LN_DESC(LN_DESC.LAST-1).col_name||' LIMIT 500 ;';
   ARR_INDX := ARR_INDX + 1;


   LN_TAB(ARR_INDX) := '     FORALL J IN 1 .. '||'T_'||LN_DESC(LN_DESC.FIRST + 1).col_name||'.COUNT ';
   ARR_INDX := ARR_INDX + 1;
   LN_TAB(ARR_INDX) := '     INSERT INTO '||PV_TGT_NAME||' (';
   ARR_INDX := ARR_INDX + 1;
    FOR i IN LN_DESC.FIRST + 1 .. LN_DESC.LAST - 1 LOOP
      LN_TAB(ARR_INDX) := '                        '||LN_DESC(i).col_name||CASE WHEN I = LN_DESC.LAST - 1  THEN ' )' ELSE ',' END ;
      ARR_INDX := ARR_INDX + 1;
    END LOOP;
    FOR i IN LN_DESC.FIRST + 1 .. LN_DESC.LAST - 1 LOOP
      LN_TAB(ARR_INDX) := CASE WHEN I = LN_DESC.FIRST + 1 THEN 'VALUES (' ELSE NULL END ||'                        T_'||LN_DESC(i).col_name||'(J)'||CASE WHEN I = LN_DESC.LAST - 1  THEN ' ) ;' ELSE ',' END ;
      ARR_INDX := ARR_INDX + 1;
    END LOOP;


   LN_TAB(ARR_INDX) := '      COMMIT;';
   ARR_INDX := ARR_INDX + 1;


   LN_TAB(ARR_INDX) := '      EXIT WHEN CUR_VIEW_INS%NOTFOUND;';
   ARR_INDX := ARR_INDX + 1;


   LN_TAB(ARR_INDX) := '   END LOOP;';
   ARR_INDX := ARR_INDX + 1;


   LN_TAB(ARR_INDX) := '   CLOSE CUR_VIEW_INS;';
   ARR_INDX := ARR_INDX + 1;


   LN_TAB(ARR_INDX) := '      COMMIT;';
   ARR_INDX := ARR_INDX + 1;


   LN_TAB(ARR_INDX) := 'END ;';
   ARR_INDX := ARR_INDX + 1;




   FOR J IN 1 .. LN_TAB.COUNT LOOP
--     DBMS_OUTPUT.PUT_LINE( LN_TAB(J));
--     FILE_WRITE(UTL_FP,LN_TAB(J));
     LV_AN_BLOCK := LV_AN_BLOCK||LN_TAB(J);
   END LOOP;


--   UTL_FILE.FCLOSE(UTL_FP);


   EXECUTE IMMEDIATE LV_AN_BLOCK;


PN_ERR_CD    := 0;
PN_ERR_MSG   := 'Successful Completion';


EXCEPTION
WHEN OTHERS THEN
PN_ERR_CD    := SQLCODE;
PN_ERR_MSG   := LV_ERR_MSG||' -- '||SQLERRM ;
END;
/

    Thank you all for your answers. I agree with you all. I have manged this time by adding variable bind, then run it immediately ON aid. I don't know how it's going to be training.

    From now on my side no problem I don't thank you.

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