ABAP Select data from SAP table ALMONSEG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALMONSEG
*  INTO TABLE @DATA(IT_ALMONSEG2).
*--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_ALMONSEG INDEX 1 INTO DATA(WA_ALMONSEG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ALMONSEG>-SEGSTATUS = 1.
<ALMONSEG>-SEGTYPE = 1.
<ALMONSEG>-SEGSDATE = 1.
<ALMONSEG>-SEGSTIME = 1.
<ALMONSEG>-SEGSDUMMY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ALMONSEG-SEGNAME, sy-vline,
  WA_ALMONSEG-SEGSYSID, sy-vline,
  WA_ALMONSEG-SEGOWNER, sy-vline,
  WA_ALMONSEG-SEGLONGTXT, sy-vline,
  WA_ALMONSEG-TOOLNAME, sy-vline,
  WA_ALMONSEG-TOOLSTATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ALMONSEG 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_ALMONSEG 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_ALMONSEG INTO WA_ALMONSEG.


*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_ALMONSEG_STR, 
SEGSTATUS TYPE STRING,
SEGTYPE TYPE STRING,
SEGSDATE TYPE STRING,
SEGSTIME TYPE STRING,
SEGSDUMMY TYPE STRING,
SEGNAME TYPE STRING,
SEGSYSID TYPE STRING,
SEGOWNER TYPE STRING,
SEGLONGTXT TYPE STRING,
TOOLNAME TYPE STRING,
TOOLSTATUS TYPE STRING,
STARTDATE TYPE STRING,
STARTTIME TYPE STRING,
STARTDUMMY TYPE STRING,
TOOLDISPAT TYPE STRING,
MTSYSID TYPE STRING,
MTMCNAME TYPE STRING,
MTNUMRANGE TYPE STRING,
MTUID TYPE STRING,
MTCLASS TYPE STRING,
MTINDEX TYPE STRING,
EXTINDEX TYPE STRING,
ALSYSID TYPE STRING,
MSEGNAME TYPE STRING,
ALUNIQNUM TYPE STRING,
ALINDEX TYPE STRING,
ALERTDATE TYPE STRING,
ALERTTIME TYPE STRING,
DUMMYALIGN TYPE STRING,
WHICHTOOL TYPE STRING,
SYXAPPLSRV TYPE STRING,
SYXSTARDAT TYPE STRING,
SYXSTARTIM TYPE STRING,
SYXSTARTDU TYPE STRING,
SYXSTOPDAT TYPE STRING,
SYXSTOPTIM TYPE STRING,
SYXSTOPDUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALMONSEG_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_ALMONSEG_STR-SEGSTATUS sy-vline 
WA_ALMONSEG_STR-SEGTYPE sy-vline 
WA_ALMONSEG_STR-SEGSDATE sy-vline 
WA_ALMONSEG_STR-SEGSTIME sy-vline 
WA_ALMONSEG_STR-SEGSDUMMY sy-vline 
WA_ALMONSEG_STR-SEGNAME sy-vline 
WA_ALMONSEG_STR-SEGSYSID sy-vline 
WA_ALMONSEG_STR-SEGOWNER sy-vline 
WA_ALMONSEG_STR-SEGLONGTXT sy-vline 
WA_ALMONSEG_STR-TOOLNAME sy-vline 
WA_ALMONSEG_STR-TOOLSTATUS sy-vline 
WA_ALMONSEG_STR-STARTDATE sy-vline 
WA_ALMONSEG_STR-STARTTIME sy-vline 
WA_ALMONSEG_STR-STARTDUMMY sy-vline 
WA_ALMONSEG_STR-TOOLDISPAT sy-vline 
WA_ALMONSEG_STR-MTSYSID sy-vline 
WA_ALMONSEG_STR-MTMCNAME sy-vline 
WA_ALMONSEG_STR-MTNUMRANGE sy-vline 
WA_ALMONSEG_STR-MTUID sy-vline 
WA_ALMONSEG_STR-MTCLASS sy-vline 
WA_ALMONSEG_STR-MTINDEX sy-vline 
WA_ALMONSEG_STR-EXTINDEX sy-vline 
WA_ALMONSEG_STR-ALSYSID sy-vline 
WA_ALMONSEG_STR-MSEGNAME sy-vline 
WA_ALMONSEG_STR-ALUNIQNUM sy-vline 
WA_ALMONSEG_STR-ALINDEX sy-vline 
WA_ALMONSEG_STR-ALERTDATE sy-vline 
WA_ALMONSEG_STR-ALERTTIME sy-vline 
WA_ALMONSEG_STR-DUMMYALIGN sy-vline 
WA_ALMONSEG_STR-WHICHTOOL sy-vline 
WA_ALMONSEG_STR-SYXAPPLSRV sy-vline 
WA_ALMONSEG_STR-SYXSTARDAT sy-vline 
WA_ALMONSEG_STR-SYXSTARTIM sy-vline 
WA_ALMONSEG_STR-SYXSTARTDU sy-vline 
WA_ALMONSEG_STR-SYXSTOPDAT sy-vline 
WA_ALMONSEG_STR-SYXSTOPTIM sy-vline 
WA_ALMONSEG_STR-SYXSTOPDUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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