ABAP Select data from SAP table /SAPAPO/CRES_API_EDITQUAN_RC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/CRES_API_EDITQUAN_RC 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 /SAPAPO/CRES_API_EDITQUAN_RC. 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 /SAPAPO/CRES_API_EDITQUAN_RC 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_/SAPAPO/CRES_API_EDITQUAN_RC TYPE STANDARD TABLE OF /SAPAPO/CRES_API_EDITQUAN_RC,
      WA_/SAPAPO/CRES_API_EDITQUAN_RC TYPE /SAPAPO/CRES_API_EDITQUAN_RC,
      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: </SAPAPO/CRES_API_EDITQUAN_RC> TYPE /SAPAPO/CRES_API_EDITQUAN_RC.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/CRES_API_EDITQUAN_RC
  INTO TABLE IT_/SAPAPO/CRES_API_EDITQUAN_RC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/CRES_API_EDITQUAN_RC
*  INTO TABLE @DATA(IT_/SAPAPO/CRES_API_EDITQUAN_RC2).
*--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_/SAPAPO/CRES_API_EDITQUAN_RC INDEX 1 INTO DATA(WA_/SAPAPO/CRES_API_EDITQUAN_RC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/CRES_API_EDITQUAN_RC ASSIGNING </SAPAPO/CRES_API_EDITQUAN_RC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/CRES_API_EDITQUAN_RC>-RESUID = 1.
</SAPAPO/CRES_API_EDITQUAN_RC>-SIMVERSID = 1.
</SAPAPO/CRES_API_EDITQUAN_RC>-NAME = 1.
</SAPAPO/CRES_API_EDITQUAN_RC>-VRSIOEX = 1.
</SAPAPO/CRES_API_EDITQUAN_RC>-VERSION = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/CRES_API_EDITQUAN_RC INTO WA_/SAPAPO/CRES_API_EDITQUAN_RC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/CRES_API_EDITQUAN_RC-BEGDA, sy-vline,
  WA_/SAPAPO/CRES_API_EDITQUAN_RC-BEGTI, sy-vline,
  WA_/SAPAPO/CRES_API_EDITQUAN_RC-TABNAME, sy-vline,
  WA_/SAPAPO/CRES_API_EDITQUAN_RC-FIELDNAME, sy-vline,
  WA_/SAPAPO/CRES_API_EDITQUAN_RC-TYPE, sy-vline,
  WA_/SAPAPO/CRES_API_EDITQUAN_RC-ID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/CRES_API_EDITQUAN_RC 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_/SAPAPO/CRES_API_EDITQUAN_RC 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_/SAPAPO/CRES_API_EDITQUAN_RC INTO WA_/SAPAPO/CRES_API_EDITQUAN_RC.


*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_/SAPAPO/CRES_API_EDITQUAN_RC_STR, 
RESUID TYPE STRING,
SIMVERSID TYPE STRING,
NAME TYPE STRING,
VRSIOEX TYPE STRING,
VERSION TYPE STRING,
BEGDA TYPE STRING,
BEGTI TYPE STRING,
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
TYPE TYPE STRING,
ID TYPE STRING,
MSGNUM TYPE STRING,
MESSAGE_V1 TYPE STRING,
MESSAGE_V2 TYPE STRING,
MESSAGE_V3 TYPE STRING,
MESSAGE_V4 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/CRES_API_EDITQUAN_RC_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_/SAPAPO/CRES_API_EDITQUAN_RC_STR-RESUID sy-vline 
WA_/SAPAPO/CRES_API_EDITQUAN_RC_STR-SIMVERSID sy-vline 
WA_/SAPAPO/CRES_API_EDITQUAN_RC_STR-NAME sy-vline 
WA_/SAPAPO/CRES_API_EDITQUAN_RC_STR-VRSIOEX sy-vline 
WA_/SAPAPO/CRES_API_EDITQUAN_RC_STR-VERSION sy-vline 
WA_/SAPAPO/CRES_API_EDITQUAN_RC_STR-BEGDA sy-vline 
WA_/SAPAPO/CRES_API_EDITQUAN_RC_STR-BEGTI sy-vline 
WA_/SAPAPO/CRES_API_EDITQUAN_RC_STR-TABNAME sy-vline 
WA_/SAPAPO/CRES_API_EDITQUAN_RC_STR-FIELDNAME sy-vline 
WA_/SAPAPO/CRES_API_EDITQUAN_RC_STR-TYPE sy-vline 
WA_/SAPAPO/CRES_API_EDITQUAN_RC_STR-ID sy-vline 
WA_/SAPAPO/CRES_API_EDITQUAN_RC_STR-MSGNUM sy-vline 
WA_/SAPAPO/CRES_API_EDITQUAN_RC_STR-MESSAGE_V1 sy-vline 
WA_/SAPAPO/CRES_API_EDITQUAN_RC_STR-MESSAGE_V2 sy-vline 
WA_/SAPAPO/CRES_API_EDITQUAN_RC_STR-MESSAGE_V3 sy-vline 
WA_/SAPAPO/CRES_API_EDITQUAN_RC_STR-MESSAGE_V4 sy-vline      INTO ld_text SEPARATED BY SPACE.

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