ABAP Select data from SAP table CRMST_L2_SLINE_COMC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CRMST_L2_SLINE_COMC 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 CRMST_L2_SLINE_COMC. 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 CRMST_L2_SLINE_COMC 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_CRMST_L2_SLINE_COMC TYPE STANDARD TABLE OF CRMST_L2_SLINE_COMC,
      WA_CRMST_L2_SLINE_COMC TYPE CRMST_L2_SLINE_COMC,
      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: <CRMST_L2_SLINE_COMC> TYPE CRMST_L2_SLINE_COMC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CRMST_L2_SLINE_COMC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CRMST_L2_SLINE_COMC
  INTO TABLE IT_CRMST_L2_SLINE_COMC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRMST_L2_SLINE_COMC
*  INTO TABLE @DATA(IT_CRMST_L2_SLINE_COMC2).
*--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_CRMST_L2_SLINE_COMC INDEX 1 INTO DATA(WA_CRMST_L2_SLINE_COMC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CRMST_L2_SLINE_COMC ASSIGNING <CRMST_L2_SLINE_COMC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRMST_L2_SLINE_COMC>-HANDLE = 1.
<CRMST_L2_SLINE_COMC>-ETENR = 1.
<CRMST_L2_SLINE_COMC>-PRGBZ = 1.
<CRMST_L2_SLINE_COMC>-ETDAT = 1.
<CRMST_L2_SLINE_COMC>-EZEIT = 1.

ENDLOOP.

LOOP AT IT_CRMST_L2_SLINE_COMC INTO WA_CRMST_L2_SLINE_COMC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRMST_L2_SLINE_COMC-WMENG, sy-vline,
  WA_CRMST_L2_SLINE_COMC-CMENG, sy-vline,
  WA_CRMST_L2_SLINE_COMC-BMENG, sy-vline,
  WA_CRMST_L2_SLINE_COMC-VSMNG, sy-vline,
  WA_CRMST_L2_SLINE_COMC-ROMS1, sy-vline,
  WA_CRMST_L2_SLINE_COMC-VRKME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRMST_L2_SLINE_COMC 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_CRMST_L2_SLINE_COMC 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_CRMST_L2_SLINE_COMC INTO WA_CRMST_L2_SLINE_COMC.


*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_CRMST_L2_SLINE_COMC_STR, 
HANDLE TYPE STRING,
ETENR TYPE STRING,
PRGBZ TYPE STRING,
ETDAT TYPE STRING,
EZEIT TYPE STRING,
WMENG TYPE STRING,
CMENG TYPE STRING,
BMENG TYPE STRING,
VSMNG TYPE STRING,
ROMS1 TYPE STRING,
VRKME TYPE STRING,
ETTYP TYPE STRING,
LIFSP TYPE STRING,
EDATU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRMST_L2_SLINE_COMC_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_CRMST_L2_SLINE_COMC_STR-HANDLE sy-vline 
WA_CRMST_L2_SLINE_COMC_STR-ETENR sy-vline 
WA_CRMST_L2_SLINE_COMC_STR-PRGBZ sy-vline 
WA_CRMST_L2_SLINE_COMC_STR-ETDAT sy-vline 
WA_CRMST_L2_SLINE_COMC_STR-EZEIT sy-vline 
WA_CRMST_L2_SLINE_COMC_STR-WMENG sy-vline 
WA_CRMST_L2_SLINE_COMC_STR-CMENG sy-vline 
WA_CRMST_L2_SLINE_COMC_STR-BMENG sy-vline 
WA_CRMST_L2_SLINE_COMC_STR-VSMNG sy-vline 
WA_CRMST_L2_SLINE_COMC_STR-ROMS1 sy-vline 
WA_CRMST_L2_SLINE_COMC_STR-VRKME sy-vline 
WA_CRMST_L2_SLINE_COMC_STR-ETTYP sy-vline 
WA_CRMST_L2_SLINE_COMC_STR-LIFSP sy-vline 
WA_CRMST_L2_SLINE_COMC_STR-EDATU sy-vline      INTO ld_text SEPARATED BY SPACE.

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