ABAP Select data from SAP table DB4_SQ3000 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB4_SQ3000 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 DB4_SQ3000. 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 DB4_SQ3000 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_DB4_SQ3000 TYPE STANDARD TABLE OF DB4_SQ3000,
      WA_DB4_SQ3000 TYPE DB4_SQ3000,
      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: <DB4_SQ3000> TYPE DB4_SQ3000.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB4_SQ3000.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB4_SQ3000
  INTO TABLE IT_DB4_SQ3000.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB4_SQ3000
*  INTO TABLE @DATA(IT_DB4_SQ30002).
*--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_DB4_SQ3000 INDEX 1 INTO DATA(WA_DB4_SQ30002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB4_SQ3000 ASSIGNING <DB4_SQ3000>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB4_SQ3000>-QQKEY = 1.
<DB4_SQ3000>-QQTIME = 1.
<DB4_SQ3000>-QQQDTN = 1.
<DB4_SQ3000>-QQQDTL = 1.
<DB4_SQ3000>-QQMATN = 1.

ENDLOOP.

LOOP AT IT_DB4_SQ3000 INTO WA_DB4_SQ3000.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB4_SQ3000-QQMATL, sy-vline,
  WA_DB4_SQ3000-QQJNP, sy-vline,
  WA_DB4_SQ3000-QQTLN, sy-vline,
  WA_DB4_SQ3000-QQTFN, sy-vline,
  WA_DB4_SQ3000-QQPTLN, sy-vline,
  WA_DB4_SQ3000-QQPTFN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB4_SQ3000 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_DB4_SQ3000 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_DB4_SQ3000 INTO WA_DB4_SQ3000.


*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_DB4_SQ3000_STR, 
QQKEY TYPE STRING,
QQTIME TYPE STRING,
QQQDTN TYPE STRING,
QQQDTL TYPE STRING,
QQMATN TYPE STRING,
QQMATL TYPE STRING,
QQJNP TYPE STRING,
QQTLN TYPE STRING,
QQTFN TYPE STRING,
QQPTLN TYPE STRING,
QQPTFN TYPE STRING,
QQTOTR TYPE STRING,
QQREST TYPE STRING,
QQAJN TYPE STRING,
QQEPT TYPE STRING,
QQJNDS TYPE STRING,
QQJNMT TYPE STRING,
QQJNTY TYPE STRING,
QQJNOP TYPE STRING,
QQDSS TYPE STRING,
QQIDXA TYPE STRING,
QQRCOD TYPE STRING,
QQLTLN TYPE STRING,
QQLTFN TYPE STRING,
QQLPTL TYPE STRING,
QQLPTF TYPE STRING,
QQC11 TYPE STRING,
QQC12 TYPE STRING,
QQC21 TYPE STRING,
QQC22 TYPE STRING,
QQI1 TYPE STRING,
QQI2 TYPE STRING,
QQC301 TYPE STRING,
QQC302 TYPE STRING,
QQ1000 TYPE STRING,
QQIDXD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB4_SQ3000_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_DB4_SQ3000_STR-QQKEY sy-vline 
WA_DB4_SQ3000_STR-QQTIME sy-vline 
WA_DB4_SQ3000_STR-QQQDTN sy-vline 
WA_DB4_SQ3000_STR-QQQDTL sy-vline 
WA_DB4_SQ3000_STR-QQMATN sy-vline 
WA_DB4_SQ3000_STR-QQMATL sy-vline 
WA_DB4_SQ3000_STR-QQJNP sy-vline 
WA_DB4_SQ3000_STR-QQTLN sy-vline 
WA_DB4_SQ3000_STR-QQTFN sy-vline 
WA_DB4_SQ3000_STR-QQPTLN sy-vline 
WA_DB4_SQ3000_STR-QQPTFN sy-vline 
WA_DB4_SQ3000_STR-QQTOTR sy-vline 
WA_DB4_SQ3000_STR-QQREST sy-vline 
WA_DB4_SQ3000_STR-QQAJN sy-vline 
WA_DB4_SQ3000_STR-QQEPT sy-vline 
WA_DB4_SQ3000_STR-QQJNDS sy-vline 
WA_DB4_SQ3000_STR-QQJNMT sy-vline 
WA_DB4_SQ3000_STR-QQJNTY sy-vline 
WA_DB4_SQ3000_STR-QQJNOP sy-vline 
WA_DB4_SQ3000_STR-QQDSS sy-vline 
WA_DB4_SQ3000_STR-QQIDXA sy-vline 
WA_DB4_SQ3000_STR-QQRCOD sy-vline 
WA_DB4_SQ3000_STR-QQLTLN sy-vline 
WA_DB4_SQ3000_STR-QQLTFN sy-vline 
WA_DB4_SQ3000_STR-QQLPTL sy-vline 
WA_DB4_SQ3000_STR-QQLPTF sy-vline 
WA_DB4_SQ3000_STR-QQC11 sy-vline 
WA_DB4_SQ3000_STR-QQC12 sy-vline 
WA_DB4_SQ3000_STR-QQC21 sy-vline 
WA_DB4_SQ3000_STR-QQC22 sy-vline 
WA_DB4_SQ3000_STR-QQI1 sy-vline 
WA_DB4_SQ3000_STR-QQI2 sy-vline 
WA_DB4_SQ3000_STR-QQC301 sy-vline 
WA_DB4_SQ3000_STR-QQC302 sy-vline 
WA_DB4_SQ3000_STR-QQ1000 sy-vline 
WA_DB4_SQ3000_STR-QQIDXD sy-vline      INTO ld_text SEPARATED BY SPACE.

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