ABAP Select data from SAP table Q3140_NLB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP Q3140_NLB 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 Q3140_NLB. 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 Q3140_NLB 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_Q3140_NLB TYPE STANDARD TABLE OF Q3140_NLB,
      WA_Q3140_NLB TYPE Q3140_NLB,
      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: <Q3140_NLB> TYPE Q3140_NLB.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_Q3140_NLB.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM Q3140_NLB
  INTO TABLE IT_Q3140_NLB.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM Q3140_NLB
*  INTO TABLE @DATA(IT_Q3140_NLB2).
*--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_Q3140_NLB INDEX 1 INTO DATA(WA_Q3140_NLB2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_Q3140_NLB ASSIGNING <Q3140_NLB>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<Q3140_NLB>-NLBBF = 1.
<Q3140_NLB>-NLBEF = 1.
<Q3140_NLB>-NLBBS = 1.
<Q3140_NLB>-NLBES = 1.
<Q3140_NLB>-NLBBT = 1.

ENDLOOP.

LOOP AT IT_Q3140_NLB INTO WA_Q3140_NLB.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_Q3140_NLB-NLBET, sy-vline,
  WA_Q3140_NLB-NLBDL, sy-vline,
  WA_Q3140_NLB-NLBST, sy-vline,
  WA_Q3140_NLB-NLBCR, sy-vline,
  WA_Q3140_NLB-NLBSG, sy-vline,
  WA_Q3140_NLB-NLBRE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_Q3140_NLB 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_Q3140_NLB 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_Q3140_NLB INTO WA_Q3140_NLB.


*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_Q3140_NLB_STR, 
NLBBF TYPE STRING,
NLBEF TYPE STRING,
NLBBS TYPE STRING,
NLBES TYPE STRING,
NLBBT TYPE STRING,
NLBET TYPE STRING,
NLBDL TYPE STRING,
NLBST TYPE STRING,
NLBCR TYPE STRING,
NLBSG TYPE STRING,
NLBRE TYPE STRING,
NLBSU TYPE STRING,
NLBNO TYPE STRING,
NLBEE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_Q3140_NLB_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_Q3140_NLB_STR-NLBBF sy-vline 
WA_Q3140_NLB_STR-NLBEF sy-vline 
WA_Q3140_NLB_STR-NLBBS sy-vline 
WA_Q3140_NLB_STR-NLBES sy-vline 
WA_Q3140_NLB_STR-NLBBT sy-vline 
WA_Q3140_NLB_STR-NLBET sy-vline 
WA_Q3140_NLB_STR-NLBDL sy-vline 
WA_Q3140_NLB_STR-NLBST sy-vline 
WA_Q3140_NLB_STR-NLBCR sy-vline 
WA_Q3140_NLB_STR-NLBSG sy-vline 
WA_Q3140_NLB_STR-NLBRE sy-vline 
WA_Q3140_NLB_STR-NLBSU sy-vline 
WA_Q3140_NLB_STR-NLBNO sy-vline 
WA_Q3140_NLB_STR-NLBEE sy-vline      INTO ld_text SEPARATED BY SPACE.

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