ABAP Select data from SAP table DB2THREAD2 into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB2THREAD2 table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to DB2THREAD2. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the DB2THREAD2 table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_DB2THREAD2 TYPE STANDARD TABLE OF DB2THREAD2,
      WA_DB2THREAD2 TYPE DB2THREAD2,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <DB2THREAD2> TYPE DB2THREAD2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB2THREAD2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB2THREAD2
  INTO TABLE IT_DB2THREAD2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB2THREAD2
*  INTO TABLE @DATA(IT_DB2THREAD22).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_DB2THREAD2 INDEX 1 INTO DATA(WA_DB2THREAD22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB2THREAD2 ASSIGNING <DB2THREAD2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB2THREAD2>-MEMB_NAME = 1.
<DB2THREAD2>-ACE = 1.
<DB2THREAD2>-BPNAME = 1.
<DB2THREAD2>-QBACPID = 1.
<DB2THREAD2>-QBACGET = 1.

ENDLOOP.

LOOP AT IT_DB2THREAD2 INTO WA_DB2THREAD2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB2THREAD2-QBACSWS, sy-vline,
  WA_DB2THREAD2-QBACRIO, sy-vline,
  WA_DB2THREAD2-QBACSEQ, sy-vline,
  WA_DB2THREAD2-QBACIMW, sy-vline,
  WA_DB2THREAD2-QBACLPF, sy-vline,
  WA_DB2THREAD2-QBACDPF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB2THREAD2 you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_DB2THREAD2 TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_DB2THREAD2 INTO WA_DB2THREAD2.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DB2THREAD2_STR, 
MEMB_NAME TYPE STRING,
ACE TYPE STRING,
BPNAME TYPE STRING,
QBACPID TYPE STRING,
QBACGET TYPE STRING,
QBACSWS TYPE STRING,
QBACRIO TYPE STRING,
QBACSEQ TYPE STRING,
QBACIMW TYPE STRING,
QBACLPF TYPE STRING,
QBACDPF TYPE STRING,
QBACHRE TYPE STRING,
QBACHRF TYPE STRING,
QBACHWF TYPE STRING,
QBACHWR TYPE STRING,
QBACNGT TYPE STRING,
QBACSIO TYPE STRING,
QBACHPG TYPE STRING,
HPSRWRATE TYPE STRING,
HPUNSUCC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB2THREAD2_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_DB2THREAD2_STR-MEMB_NAME sy-vline 
WA_DB2THREAD2_STR-ACE sy-vline 
WA_DB2THREAD2_STR-BPNAME sy-vline 
WA_DB2THREAD2_STR-QBACPID sy-vline 
WA_DB2THREAD2_STR-QBACGET sy-vline 
WA_DB2THREAD2_STR-QBACSWS sy-vline 
WA_DB2THREAD2_STR-QBACRIO sy-vline 
WA_DB2THREAD2_STR-QBACSEQ sy-vline 
WA_DB2THREAD2_STR-QBACIMW sy-vline 
WA_DB2THREAD2_STR-QBACLPF sy-vline 
WA_DB2THREAD2_STR-QBACDPF sy-vline 
WA_DB2THREAD2_STR-QBACHRE sy-vline 
WA_DB2THREAD2_STR-QBACHRF sy-vline 
WA_DB2THREAD2_STR-QBACHWF sy-vline 
WA_DB2THREAD2_STR-QBACHWR sy-vline 
WA_DB2THREAD2_STR-QBACNGT sy-vline 
WA_DB2THREAD2_STR-QBACSIO sy-vline 
WA_DB2THREAD2_STR-QBACHPG sy-vline 
WA_DB2THREAD2_STR-HPSRWRATE sy-vline 
WA_DB2THREAD2_STR-HPUNSUCC sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.