ABAP Select data from SAP table Q588A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP Q588A 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 Q588A. 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 Q588A 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_Q588A TYPE STANDARD TABLE OF Q588A,
      WA_Q588A TYPE Q588A,
      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: <Q588A> TYPE Q588A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_Q588A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM Q588A
  INTO TABLE IT_Q588A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM Q588A
*  INTO TABLE @DATA(IT_Q588A2).
*--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_Q588A INDEX 1 INTO DATA(WA_Q588A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_Q588A ASSIGNING <Q588A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<Q588A>-TCD01 = 1.
<Q588A>-TCD02 = 1.
<Q588A>-OTHTC = 1.
<Q588A>-VIE01 = 1.
<Q588A>-VIE02 = 1.

ENDLOOP.

LOOP AT IT_Q588A INTO WA_Q588A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_Q588A-OTHMN, sy-vline,
  WA_Q588A-MASS1, sy-vline,
  WA_Q588A-MASS2, sy-vline,
  WA_Q588A-MASB1, sy-vline,
  WA_Q588A-MASB2, sy-vline,
  WA_Q588A-OTHMS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_Q588A 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_Q588A 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_Q588A INTO WA_Q588A.


*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_Q588A_STR, 
TCD01 TYPE STRING,
TCD02 TYPE STRING,
OTHTC TYPE STRING,
VIE01 TYPE STRING,
VIE02 TYPE STRING,
OTHMN TYPE STRING,
MASS1 TYPE STRING,
MASS2 TYPE STRING,
MASB1 TYPE STRING,
MASB2 TYPE STRING,
OTHMS TYPE STRING,
OTHMB TYPE STRING,
DHD01 TYPE STRING,
MOL01 TYPE STRING,
TCL01 TYPE STRING,
DHD02 TYPE STRING,
MOL02 TYPE STRING,
TCL02 TYPE STRING,
DHD03 TYPE STRING,
MOL03 TYPE STRING,
TCL03 TYPE STRING,
OTHHD TYPE STRING,
KYWRD TYPE STRING,
KYTXT TYPE STRING,
EINPL TYPE STRING,
EINWE TYPE STRING,
EINPG TYPE STRING,
EINPK TYPE STRING,
DBPREL TYPE STRING,
DBPAPL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_Q588A_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_Q588A_STR-TCD01 sy-vline 
WA_Q588A_STR-TCD02 sy-vline 
WA_Q588A_STR-OTHTC sy-vline 
WA_Q588A_STR-VIE01 sy-vline 
WA_Q588A_STR-VIE02 sy-vline 
WA_Q588A_STR-OTHMN sy-vline 
WA_Q588A_STR-MASS1 sy-vline 
WA_Q588A_STR-MASS2 sy-vline 
WA_Q588A_STR-MASB1 sy-vline 
WA_Q588A_STR-MASB2 sy-vline 
WA_Q588A_STR-OTHMS sy-vline 
WA_Q588A_STR-OTHMB sy-vline 
WA_Q588A_STR-DHD01 sy-vline 
WA_Q588A_STR-MOL01 sy-vline 
WA_Q588A_STR-TCL01 sy-vline 
WA_Q588A_STR-DHD02 sy-vline 
WA_Q588A_STR-MOL02 sy-vline 
WA_Q588A_STR-TCL02 sy-vline 
WA_Q588A_STR-DHD03 sy-vline 
WA_Q588A_STR-MOL03 sy-vline 
WA_Q588A_STR-TCL03 sy-vline 
WA_Q588A_STR-OTHHD sy-vline 
WA_Q588A_STR-KYWRD sy-vline 
WA_Q588A_STR-KYTXT sy-vline 
WA_Q588A_STR-EINPL sy-vline 
WA_Q588A_STR-EINWE sy-vline 
WA_Q588A_STR-EINPG sy-vline 
WA_Q588A_STR-EINPK sy-vline 
WA_Q588A_STR-DBPREL sy-vline 
WA_Q588A_STR-DBPAPL sy-vline      INTO ld_text SEPARATED BY SPACE.

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