ABAP Select data from SAP table ISU17_METERDOCU_MASTERDATA_M18 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ISU17_METERDOCU_MASTERDATA_M18 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 ISU17_METERDOCU_MASTERDATA_M18. 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 ISU17_METERDOCU_MASTERDATA_M18 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_ISU17_METERDOCU_MASTERDATA_M18 TYPE STANDARD TABLE OF ISU17_METERDOCU_MASTERDATA_M18,
      WA_ISU17_METERDOCU_MASTERDATA_M18 TYPE ISU17_METERDOCU_MASTERDATA_M18,
      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: <ISU17_METERDOCU_MASTERDATA_M18> TYPE ISU17_METERDOCU_MASTERDATA_M18.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ISU17_METERDOCU_MASTERDATA_M18.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ISU17_METERDOCU_MASTERDATA_M18
  INTO TABLE IT_ISU17_METERDOCU_MASTERDATA_M18.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISU17_METERDOCU_MASTERDATA_M18
*  INTO TABLE @DATA(IT_ISU17_METERDOCU_MASTERDATA_M182).
*--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_ISU17_METERDOCU_MASTERDATA_M18 INDEX 1 INTO DATA(WA_ISU17_METERDOCU_MASTERDATA_M182).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ISU17_METERDOCU_MASTERDATA_M18 ASSIGNING <ISU17_METERDOCU_MASTERDATA_M18>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISU17_METERDOCU_MASTERDATA_M18>-AUFRUF = 1.
<ISU17_METERDOCU_MASTERDATA_M18>-IETDZ = 1.
<ISU17_METERDOCU_MASTERDATA_M18>-ETDZ_PROVIDED = 1.
<ISU17_METERDOCU_MASTERDATA_M18>-IEASTE = 1.
<ISU17_METERDOCU_MASTERDATA_M18>-EASTE_PROVIDED = 1.

ENDLOOP.

LOOP AT IT_ISU17_METERDOCU_MASTERDATA_M18 INTO WA_ISU17_METERDOCU_MASTERDATA_M18.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISU17_METERDOCU_MASTERDATA_M18-IEZUZ, sy-vline,
  WA_ISU17_METERDOCU_MASTERDATA_M18-EZUZ_PROVIDED, sy-vline,
  WA_ISU17_METERDOCU_MASTERDATA_M18-IEADZ, sy-vline,
  WA_ISU17_METERDOCU_MASTERDATA_M18-EADZ_PROVIDED, sy-vline,
  WA_ISU17_METERDOCU_MASTERDATA_M18-IEDISCOBJ, sy-vline,
  WA_ISU17_METERDOCU_MASTERDATA_M18-EDISCOBJ_PROVIDED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISU17_METERDOCU_MASTERDATA_M18 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_ISU17_METERDOCU_MASTERDATA_M18 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_ISU17_METERDOCU_MASTERDATA_M18 INTO WA_ISU17_METERDOCU_MASTERDATA_M18.


*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_ISU17_METERDOCU_MASTERDATA_M18_STR, 
AUFRUF TYPE STRING,
IETDZ TYPE STRING,
ETDZ_PROVIDED TYPE STRING,
IEASTE TYPE STRING,
EASTE_PROVIDED TYPE STRING,
IEZUZ TYPE STRING,
EZUZ_PROVIDED TYPE STRING,
IEADZ TYPE STRING,
EADZ_PROVIDED TYPE STRING,
IEDISCOBJ TYPE STRING,
EDISCOBJ_PROVIDED TYPE STRING,
IEASTS TYPE STRING,
EASTS_PROVIDED TYPE STRING,
IEVER TYPE STRING,
EVER_PROVIDED TYPE STRING,
IEANL TYPE STRING,
EANL_PROVIDED TYPE STRING,
IETFND TYPE STRING,
IETFND_PROVIDED TYPE STRING,
IETRF TYPE STRING,
ETRF_PROVIDED TYPE STRING,
IEGER TYPE STRING,
EGER_PROVIDED TYPE STRING,
IEABL TYPE STRING,
EABL_PROVIDED TYPE STRING,
IEZWG_NEW TYPE STRING,
IEZWG_NEW_PROVIDED TYPE STRING,
IEADZ_QD TYPE STRING,
EADZ_QD_PROVIDED TYPE STRING,
IEZWG_QD_NEW TYPE STRING,
IEZWG_QD_NEW_PROVIDED TYPE STRING,
AMI_DATA_NEW TYPE STRING,
AMI_DATA_NEW_PROVIDED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISU17_METERDOCU_MASTERDATA_M18_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_ISU17_METERDOCU_MASTERDATA_M18_STR-AUFRUF sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IETDZ sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-ETDZ_PROVIDED sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IEASTE sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-EASTE_PROVIDED sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IEZUZ sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-EZUZ_PROVIDED sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IEADZ sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-EADZ_PROVIDED sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IEDISCOBJ sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-EDISCOBJ_PROVIDED sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IEASTS sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-EASTS_PROVIDED sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IEVER sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-EVER_PROVIDED sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IEANL sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-EANL_PROVIDED sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IETFND sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IETFND_PROVIDED sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IETRF sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-ETRF_PROVIDED sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IEGER sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-EGER_PROVIDED sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IEABL sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-EABL_PROVIDED sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IEZWG_NEW sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IEZWG_NEW_PROVIDED sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IEADZ_QD sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-EADZ_QD_PROVIDED sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IEZWG_QD_NEW sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-IEZWG_QD_NEW_PROVIDED sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-AMI_DATA_NEW sy-vline 
WA_ISU17_METERDOCU_MASTERDATA_M18_STR-AMI_DATA_NEW_PROVIDED sy-vline      INTO ld_text SEPARATED BY SPACE.

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