ABAP Select data from SAP table ALXMBPFALERT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALXMBPFALERT
*  INTO TABLE @DATA(IT_ALXMBPFALERT2).
*--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_ALXMBPFALERT INDEX 1 INTO DATA(WA_ALXMBPFALERT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ALXMBPFALERT>-NODE_NAME = 1.
<ALXMBPFALERT>-PARTYAGENCYF = 1.
<ALXMBPFALERT>-PARTYTYPEF = 1.
<ALXMBPFALERT>-PARTYF = 1.
<ALXMBPFALERT>-SERVICEF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ALXMBPFALERT-NAMEF, sy-vline,
  WA_ALXMBPFALERT-NAMESPACEF, sy-vline,
  WA_ALXMBPFALERT-PARTYAGENCYT, sy-vline,
  WA_ALXMBPFALERT-PARTYTYPET, sy-vline,
  WA_ALXMBPFALERT-PARTYT, sy-vline,
  WA_ALXMBPFALERT-SERVICET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ALXMBPFALERT 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_ALXMBPFALERT 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_ALXMBPFALERT INTO WA_ALXMBPFALERT.


*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_ALXMBPFALERT_STR, 
NODE_NAME TYPE STRING,
PARTYAGENCYF TYPE STRING,
PARTYTYPEF TYPE STRING,
PARTYF TYPE STRING,
SERVICEF TYPE STRING,
NAMEF TYPE STRING,
NAMESPACEF TYPE STRING,
PARTYAGENCYT TYPE STRING,
PARTYTYPET TYPE STRING,
PARTYT TYPE STRING,
SERVICET TYPE STRING,
NAMET TYPE STRING,
NAMESPACET TYPE STRING,
THRESHG2Y TYPE STRING,
THRESHY2R TYPE STRING,
MODIFIEDBY TYPE STRING,
MODIFYDATE TYPE STRING,
MODIFYTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALXMBPFALERT_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_ALXMBPFALERT_STR-NODE_NAME sy-vline 
WA_ALXMBPFALERT_STR-PARTYAGENCYF sy-vline 
WA_ALXMBPFALERT_STR-PARTYTYPEF sy-vline 
WA_ALXMBPFALERT_STR-PARTYF sy-vline 
WA_ALXMBPFALERT_STR-SERVICEF sy-vline 
WA_ALXMBPFALERT_STR-NAMEF sy-vline 
WA_ALXMBPFALERT_STR-NAMESPACEF sy-vline 
WA_ALXMBPFALERT_STR-PARTYAGENCYT sy-vline 
WA_ALXMBPFALERT_STR-PARTYTYPET sy-vline 
WA_ALXMBPFALERT_STR-PARTYT sy-vline 
WA_ALXMBPFALERT_STR-SERVICET sy-vline 
WA_ALXMBPFALERT_STR-NAMET sy-vline 
WA_ALXMBPFALERT_STR-NAMESPACET sy-vline 
WA_ALXMBPFALERT_STR-THRESHG2Y sy-vline 
WA_ALXMBPFALERT_STR-THRESHY2R sy-vline 
WA_ALXMBPFALERT_STR-MODIFIEDBY sy-vline 
WA_ALXMBPFALERT_STR-MODIFYDATE sy-vline 
WA_ALXMBPFALERT_STR-MODIFYTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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