ABAP Select data from SAP table UM4CHKP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP UM4CHKP 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 UM4CHKP. 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 UM4CHKP 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_UM4CHKP TYPE STANDARD TABLE OF UM4CHKP,
      WA_UM4CHKP TYPE UM4CHKP,
      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: <UM4CHKP> TYPE UM4CHKP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_UM4CHKP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM UM4CHKP
  INTO TABLE IT_UM4CHKP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UM4CHKP
*  INTO TABLE @DATA(IT_UM4CHKP2).
*--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_UM4CHKP INDEX 1 INTO DATA(WA_UM4CHKP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_UM4CHKP ASSIGNING <UM4CHKP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UM4CHKP>-RELID = 1.
<UM4CHKP>-TABNAME = 1.
<UM4CHKP>-SRTF2 = 1.
<UM4CHKP>-CP_DATE = 1.
<UM4CHKP>-CP_TIME = 1.

ENDLOOP.

LOOP AT IT_UM4CHKP INTO WA_UM4CHKP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UM4CHKP-ROW_CNT, sy-vline,
  WA_UM4CHKP-BATCHNAME, sy-vline,
  WA_UM4CHKP-ASCII, sy-vline,
  WA_UM4CHKP-NON_ASCII, sy-vline,
  WA_UM4CHKP-TABSIZE, sy-vline,
  WA_UM4CHKP-CPR_BAD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UM4CHKP 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_UM4CHKP 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_UM4CHKP INTO WA_UM4CHKP.


*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_UM4CHKP_STR, 
RELID TYPE STRING,
TABNAME TYPE STRING,
SRTF2 TYPE STRING,
CP_DATE TYPE STRING,
CP_TIME TYPE STRING,
ROW_CNT TYPE STRING,
BATCHNAME TYPE STRING,
ASCII TYPE STRING,
NON_ASCII TYPE STRING,
TABSIZE TYPE STRING,
CPR_BAD TYPE STRING,
CPR_GOOD TYPE STRING,
LAST_CP TYPE STRING,
DIFF_CP TYPE STRING,
NUM_ERROR TYPE STRING,
NUM_TOTAL TYPE STRING,
DIC_INS TYPE STRING,
LANG_SPC TYPE STRING,
BAD_LANG TYPE STRING,
DEFAULT_CP TYPE STRING,
CTRL_CODE TYPE STRING,
LOGCNT TYPE STRING,
CLUSTR TYPE STRING,
CLUSTD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UM4CHKP_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_UM4CHKP_STR-RELID sy-vline 
WA_UM4CHKP_STR-TABNAME sy-vline 
WA_UM4CHKP_STR-SRTF2 sy-vline 
WA_UM4CHKP_STR-CP_DATE sy-vline 
WA_UM4CHKP_STR-CP_TIME sy-vline 
WA_UM4CHKP_STR-ROW_CNT sy-vline 
WA_UM4CHKP_STR-BATCHNAME sy-vline 
WA_UM4CHKP_STR-ASCII sy-vline 
WA_UM4CHKP_STR-NON_ASCII sy-vline 
WA_UM4CHKP_STR-TABSIZE sy-vline 
WA_UM4CHKP_STR-CPR_BAD sy-vline 
WA_UM4CHKP_STR-CPR_GOOD sy-vline 
WA_UM4CHKP_STR-LAST_CP sy-vline 
WA_UM4CHKP_STR-DIFF_CP sy-vline 
WA_UM4CHKP_STR-NUM_ERROR sy-vline 
WA_UM4CHKP_STR-NUM_TOTAL sy-vline 
WA_UM4CHKP_STR-DIC_INS sy-vline 
WA_UM4CHKP_STR-LANG_SPC sy-vline 
WA_UM4CHKP_STR-BAD_LANG sy-vline 
WA_UM4CHKP_STR-DEFAULT_CP sy-vline 
WA_UM4CHKP_STR-CTRL_CODE sy-vline 
WA_UM4CHKP_STR-LOGCNT sy-vline 
WA_UM4CHKP_STR-CLUSTR sy-vline 
WA_UM4CHKP_STR-CLUSTD sy-vline      INTO ld_text SEPARATED BY SPACE.

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