ABAP Select data from SAP table ATP_CHECK_SEG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ATP_CHECK_SEG
*  INTO TABLE @DATA(IT_ATP_CHECK_SEG2).
*--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_ATP_CHECK_SEG INDEX 1 INTO DATA(WA_ATP_CHECK_SEG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ATP_CHECK_SEG>-MATNR = 1.
<ATP_CHECK_SEG>-WERKS = 1.
<ATP_CHECK_SEG>-LGORT = 1.
<ATP_CHECK_SEG>-BERID = 1.
<ATP_CHECK_SEG>-SOBKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ATP_CHECK_SEG-SSKEY, sy-vline,
  WA_ATP_CHECK_SEG-SSKEY_EXT, sy-vline,
  WA_ATP_CHECK_SEG-CHARG, sy-vline,
  WA_ATP_CHECK_SEG-SGT_CATV, sy-vline,
  WA_ATP_CHECK_SEG-LIFNR, sy-vline,
  WA_ATP_CHECK_SEG-DATE_NOW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ATP_CHECK_SEG 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_ATP_CHECK_SEG 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_ATP_CHECK_SEG INTO WA_ATP_CHECK_SEG.


*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.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ATP_CHECK_SEG-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATP_CHECK_SEG-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ATP_CHECK_SEG-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATP_CHECK_SEG-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ATP_CHECK_SEG-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATP_CHECK_SEG-MEINS.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ATP_CHECK_SEG_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
BERID TYPE STRING,
SOBKZ TYPE STRING,
SSKEY TYPE STRING,
SSKEY_EXT TYPE STRING,
CHARG TYPE STRING,
SGT_CATV TYPE STRING,
LIFNR TYPE STRING,
DATE_NOW TYPE STRING,
WZTER TYPE STRING,
ONVBA TYPE STRING,
EISBE TYPE STRING,
DISGR TYPE STRING,
GRPNR TYPE STRING,
WEBAZ TYPE STRING,
FABKL TYPE STRING,
XCHPF TYPE STRING,
MEINS TYPE STRING,
WERTU TYPE STRING,
INSMK TYPE STRING,
BZTEK TYPE STRING,
TRTYP TYPE STRING,
KZWSM TYPE STRING,
CHECK_MODE TYPE STRING,
TZONE TYPE STRING,
MANDT TYPE STRING,
LAND1 TYPE STRING,
ZONE1 TYPE STRING,
SKIP_UNRESTRICTED_STOCK TYPE STRING,
SGT_SCOPE TYPE STRING,
SGT_COVS TYPE STRING,
SGT_ATP_USE_SEG TYPE STRING,
SGT_RULE TYPE STRING,
MANDT TYPE STRING,
MTVFP TYPE STRING,
PRREG TYPE STRING,
EISBP TYPE STRING,
UMLMP TYPE STRING,
QMBSP TYPE STRING,
BESTP TYPE STRING,
FERTP TYPE STRING,
BANFP TYPE STRING,
PLAFP TYPE STRING,
SKBDP TYPE STRING,
RESBP TYPE STRING,
ARREP TYPE STRING,
VBBDP TYPE STRING,
VBBLP TYPE STRING,
OWBZP TYPE STRING,
SBSTP TYPE STRING,
LAVIP TYPE STRING,
WZTWE TYPE STRING,
TBBEP TYPE STRING,
OLGPR TYPE STRING,
OLBPR TYPE STRING,
NFVBC TYPE STRING,
RPAST TYPE STRING,
VWBEST TYPE STRING,
PRIBED TYPE STRING,
QUANTITY_DIST TYPE STRING,
ENABLE_SUPPLY_PROTECTION TYPE STRING,
FSH_MG_ARUN_REQ TYPE STRING,
ARUN_FIX_BATCH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ATP_CHECK_SEG_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_ATP_CHECK_SEG_STR-MATNR sy-vline 
WA_ATP_CHECK_SEG_STR-WERKS sy-vline 
WA_ATP_CHECK_SEG_STR-LGORT sy-vline 
WA_ATP_CHECK_SEG_STR-BERID sy-vline 
WA_ATP_CHECK_SEG_STR-SOBKZ sy-vline 
WA_ATP_CHECK_SEG_STR-SSKEY sy-vline 
WA_ATP_CHECK_SEG_STR-SSKEY_EXT sy-vline 
WA_ATP_CHECK_SEG_STR-CHARG sy-vline 
WA_ATP_CHECK_SEG_STR-SGT_CATV sy-vline 
WA_ATP_CHECK_SEG_STR-LIFNR sy-vline 
WA_ATP_CHECK_SEG_STR-DATE_NOW sy-vline 
WA_ATP_CHECK_SEG_STR-WZTER sy-vline 
WA_ATP_CHECK_SEG_STR-ONVBA sy-vline 
WA_ATP_CHECK_SEG_STR-EISBE sy-vline 
WA_ATP_CHECK_SEG_STR-DISGR sy-vline 
WA_ATP_CHECK_SEG_STR-GRPNR sy-vline 
WA_ATP_CHECK_SEG_STR-WEBAZ sy-vline 
WA_ATP_CHECK_SEG_STR-FABKL sy-vline 
WA_ATP_CHECK_SEG_STR-XCHPF sy-vline 
WA_ATP_CHECK_SEG_STR-MEINS sy-vline 
WA_ATP_CHECK_SEG_STR-WERTU sy-vline 
WA_ATP_CHECK_SEG_STR-INSMK sy-vline 
WA_ATP_CHECK_SEG_STR-BZTEK sy-vline 
WA_ATP_CHECK_SEG_STR-TRTYP sy-vline 
WA_ATP_CHECK_SEG_STR-KZWSM sy-vline 
WA_ATP_CHECK_SEG_STR-CHECK_MODE sy-vline 
WA_ATP_CHECK_SEG_STR-TZONE sy-vline 
WA_ATP_CHECK_SEG_STR-MANDT sy-vline 
WA_ATP_CHECK_SEG_STR-LAND1 sy-vline 
WA_ATP_CHECK_SEG_STR-ZONE1 sy-vline 
WA_ATP_CHECK_SEG_STR-SKIP_UNRESTRICTED_STOCK sy-vline 
WA_ATP_CHECK_SEG_STR-SGT_SCOPE sy-vline 
WA_ATP_CHECK_SEG_STR-SGT_COVS sy-vline 
WA_ATP_CHECK_SEG_STR-SGT_ATP_USE_SEG sy-vline 
WA_ATP_CHECK_SEG_STR-SGT_RULE sy-vline 
WA_ATP_CHECK_SEG_STR-MANDT sy-vline 
WA_ATP_CHECK_SEG_STR-MTVFP sy-vline 
WA_ATP_CHECK_SEG_STR-PRREG sy-vline 
WA_ATP_CHECK_SEG_STR-EISBP sy-vline 
WA_ATP_CHECK_SEG_STR-UMLMP sy-vline 
WA_ATP_CHECK_SEG_STR-QMBSP sy-vline 
WA_ATP_CHECK_SEG_STR-BESTP sy-vline 
WA_ATP_CHECK_SEG_STR-FERTP sy-vline 
WA_ATP_CHECK_SEG_STR-BANFP sy-vline 
WA_ATP_CHECK_SEG_STR-PLAFP sy-vline 
WA_ATP_CHECK_SEG_STR-SKBDP sy-vline 
WA_ATP_CHECK_SEG_STR-RESBP sy-vline 
WA_ATP_CHECK_SEG_STR-ARREP sy-vline 
WA_ATP_CHECK_SEG_STR-VBBDP sy-vline 
WA_ATP_CHECK_SEG_STR-VBBLP sy-vline 
WA_ATP_CHECK_SEG_STR-OWBZP sy-vline 
WA_ATP_CHECK_SEG_STR-SBSTP sy-vline 
WA_ATP_CHECK_SEG_STR-LAVIP sy-vline 
WA_ATP_CHECK_SEG_STR-WZTWE sy-vline 
WA_ATP_CHECK_SEG_STR-TBBEP sy-vline 
WA_ATP_CHECK_SEG_STR-OLGPR sy-vline 
WA_ATP_CHECK_SEG_STR-OLBPR sy-vline 
WA_ATP_CHECK_SEG_STR-NFVBC sy-vline 
WA_ATP_CHECK_SEG_STR-RPAST sy-vline 
WA_ATP_CHECK_SEG_STR-VWBEST sy-vline 
WA_ATP_CHECK_SEG_STR-PRIBED sy-vline 
WA_ATP_CHECK_SEG_STR-QUANTITY_DIST sy-vline 
WA_ATP_CHECK_SEG_STR-ENABLE_SUPPLY_PROTECTION sy-vline 
WA_ATP_CHECK_SEG_STR-FSH_MG_ARUN_REQ sy-vline 
WA_ATP_CHECK_SEG_STR-ARUN_FIX_BATCH sy-vline      INTO ld_text SEPARATED BY SPACE.

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