ABAP Select data from SAP table LOP_S_LIST_HD_COM_REF_H into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LOP_S_LIST_HD_COM_REF_H
*  INTO TABLE @DATA(IT_LOP_S_LIST_HD_COM_REF_H2).
*--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_LOP_S_LIST_HD_COM_REF_H INDEX 1 INTO DATA(WA_LOP_S_LIST_HD_COM_REF_H2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LOP_S_LIST_HD_COM_REF_H>-CLIENT_H = 1.
<LOP_S_LIST_HD_COM_REF_H>-REF_GUID_H = 1.
<LOP_S_LIST_HD_COM_REF_H>-LOP_CAT_H = 1.
<LOP_S_LIST_HD_COM_REF_H>-UPDKZ_H = 1.
<LOP_S_LIST_HD_COM_REF_H>-CLIENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LOP_S_LIST_HD_COM_REF_H-LIST_GUID, sy-vline,
  WA_LOP_S_LIST_HD_COM_REF_H-EXT_REF, sy-vline,
  WA_LOP_S_LIST_HD_COM_REF_H-LOP_GROUP, sy-vline,
  WA_LOP_S_LIST_HD_COM_REF_H-LOP_CAT, sy-vline,
  WA_LOP_S_LIST_HD_COM_REF_H-LOP_TYPE, sy-vline,
  WA_LOP_S_LIST_HD_COM_REF_H-OWNER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LOP_S_LIST_HD_COM_REF_H 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_LOP_S_LIST_HD_COM_REF_H 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_LOP_S_LIST_HD_COM_REF_H INTO WA_LOP_S_LIST_HD_COM_REF_H.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field EVENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LOP_S_LIST_HD_COM_REF_H-EVENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LOP_S_LIST_HD_COM_REF_H-EVENT.
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_LOP_S_LIST_HD_COM_REF_H_STR, 
CLIENT_H TYPE STRING,
REF_GUID_H TYPE STRING,
LOP_CAT_H TYPE STRING,
UPDKZ_H TYPE STRING,
CLIENT TYPE STRING,
LIST_GUID TYPE STRING,
EXT_REF TYPE STRING,
LOP_GROUP TYPE STRING,
LOP_CAT TYPE STRING,
LOP_TYPE TYPE STRING,
OWNER TYPE STRING,
OPT_EXECUTED TYPE STRING,
LOP_ID TYPE STRING,
DOC_TYPE TYPE STRING,
DOC_NO TYPE STRING,
DOC_ITEM_NO TYPE STRING,
REF_GUID TYPE STRING,
SIDE TYPE STRING,
CARDINALITY TYPE STRING,
TXT_GROUP TYPE STRING,
TXT_GROUP_IT TYPE STRING,
DECL_STATUS TYPE STRING,
TEXT_EXIST TYPE STRING,
MASTER_NO TYPE STRING,
DECL_GROUP TYPE STRING,
DECL_CAT TYPE STRING,
DECL_RULE TYPE STRING,
EVENT TYPE STRING,
EVENT_DATE TYPE STRING,
ORIGIN TYPE STRING,
EXPIRE_DATE TYPE STRING,
CAL_ID_RESULT TYPE STRING,
FIX_DATE TYPE STRING,
DATE_TYPE TYPE STRING,
NUM_OFFSET TYPE STRING,
DATE_RULE TYPE STRING,
FIX_DAY TYPE STRING,
PLACE_HOLDER TYPE STRING,
CR_NAME TYPE STRING,
CR_DATE TYPE STRING,
CR_TIME TYPE STRING,
CH_NAME TYPE STRING,
CH_DATE TYPE STRING,
CH_TIME TYPE STRING,
LOG_EXEC_DATE TYPE STRING,
OWNER_EXEC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LOP_S_LIST_HD_COM_REF_H_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_LOP_S_LIST_HD_COM_REF_H_STR-CLIENT_H sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-REF_GUID_H sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-LOP_CAT_H sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-UPDKZ_H sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-CLIENT sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-LIST_GUID sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-EXT_REF sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-LOP_GROUP sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-LOP_CAT sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-LOP_TYPE sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-OWNER sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-OPT_EXECUTED sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-LOP_ID sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-DOC_TYPE sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-DOC_NO sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-DOC_ITEM_NO sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-REF_GUID sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-SIDE sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-CARDINALITY sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-TXT_GROUP sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-TXT_GROUP_IT sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-DECL_STATUS sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-TEXT_EXIST sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-MASTER_NO sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-DECL_GROUP sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-DECL_CAT sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-DECL_RULE sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-EVENT sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-EVENT_DATE sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-ORIGIN sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-EXPIRE_DATE sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-CAL_ID_RESULT sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-FIX_DATE sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-DATE_TYPE sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-NUM_OFFSET sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-DATE_RULE sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-FIX_DAY sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-PLACE_HOLDER sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-CR_NAME sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-CR_DATE sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-CR_TIME sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-CH_NAME sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-CH_DATE sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-CH_TIME sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-LOG_EXEC_DATE sy-vline 
WA_LOP_S_LIST_HD_COM_REF_H_STR-OWNER_EXEC sy-vline      INTO ld_text SEPARATED BY SPACE.

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