ABAP Select data from SAP table ALMTDATSEL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALMTDATSEL
*  INTO TABLE @DATA(IT_ALMTDATSEL2).
*--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_ALMTDATSEL INDEX 1 INTO DATA(WA_ALMTDATSEL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ALMTDATSEL>-GENDATA = 1.
<ALMTDATSEL>-PERFDATA = 1.
<ALMTDATSEL>-PSMODATA = 1.
<ALMTDATSEL>-PHISTINTVL = 1.
<ALMTDATSEL>-SMESDATA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ALMTDATSEL-MSCDATA, sy-vline,
  WA_ALMTDATSEL-MSCTIMINTV, sy-vline,
  WA_ALMTDATSEL-FROM_UTC, sy-vline,
  WA_ALMTDATSEL-TO_UTC, sy-vline,
  WA_ALMTDATSEL-LAST_N_MIN, sy-vline,
  WA_ALMTDATSEL-TEXTLKDATA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ALMTDATSEL 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_ALMTDATSEL 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_ALMTDATSEL INTO WA_ALMTDATSEL.


*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_ALMTDATSEL_STR, 
GENDATA TYPE STRING,
PERFDATA TYPE STRING,
PSMODATA TYPE STRING,
PHISTINTVL TYPE STRING,
SMESDATA TYPE STRING,
MSCDATA TYPE STRING,
MSCTIMINTV TYPE STRING,
FROM_UTC TYPE STRING,
TO_UTC TYPE STRING,
LAST_N_MIN TYPE STRING,
TEXTLKDATA TYPE STRING,
HIGHALERTS TYPE STRING,
VISILEVEL TYPE STRING,
TREE TYPE STRING,
TREEMAXLVL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALMTDATSEL_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_ALMTDATSEL_STR-GENDATA sy-vline 
WA_ALMTDATSEL_STR-PERFDATA sy-vline 
WA_ALMTDATSEL_STR-PSMODATA sy-vline 
WA_ALMTDATSEL_STR-PHISTINTVL sy-vline 
WA_ALMTDATSEL_STR-SMESDATA sy-vline 
WA_ALMTDATSEL_STR-MSCDATA sy-vline 
WA_ALMTDATSEL_STR-MSCTIMINTV sy-vline 
WA_ALMTDATSEL_STR-FROM_UTC sy-vline 
WA_ALMTDATSEL_STR-TO_UTC sy-vline 
WA_ALMTDATSEL_STR-LAST_N_MIN sy-vline 
WA_ALMTDATSEL_STR-TEXTLKDATA sy-vline 
WA_ALMTDATSEL_STR-HIGHALERTS sy-vline 
WA_ALMTDATSEL_STR-VISILEVEL sy-vline 
WA_ALMTDATSEL_STR-TREE sy-vline 
WA_ALMTDATSEL_STR-TREEMAXLVL sy-vline      INTO ld_text SEPARATED BY SPACE.

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