ABAP Select data from SAP table ALPFTHRHIST_TB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALPFTHRHIST_TB
*  INTO TABLE @DATA(IT_ALPFTHRHIST_TB2).
*--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_ALPFTHRHIST_TB INDEX 1 INTO DATA(WA_ALPFTHRHIST_TB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ALPFTHRHIST_TB>-MTSYSID = 1.
<ALPFTHRHIST_TB>-MTMCNAME = 1.
<ALPFTHRHIST_TB>-MTNUMRANGE = 1.
<ALPFTHRHIST_TB>-MTUID = 1.
<ALPFTHRHIST_TB>-MTCLASS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ALPFTHRHIST_TB-VALFR_DATE, sy-vline,
  WA_ALPFTHRHIST_TB-VALFR_TIME, sy-vline,
  WA_ALPFTHRHIST_TB-TIME_ZONE, sy-vline,
  WA_ALPFTHRHIST_TB-RELVALTYPE, sy-vline,
  WA_ALPFTHRHIST_TB-THRESHDIR, sy-vline,
  WA_ALPFTHRHIST_TB-THRESHG2Y, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ALPFTHRHIST_TB 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_ALPFTHRHIST_TB 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_ALPFTHRHIST_TB INTO WA_ALPFTHRHIST_TB.


*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_ALPFTHRHIST_TB_STR, 
MTSYSID TYPE STRING,
MTMCNAME TYPE STRING,
MTNUMRANGE TYPE STRING,
MTUID TYPE STRING,
MTCLASS TYPE STRING,
VALFR_DATE TYPE STRING,
VALFR_TIME TYPE STRING,
TIME_ZONE TYPE STRING,
RELVALTYPE TYPE STRING,
THRESHDIR TYPE STRING,
THRESHG2Y TYPE STRING,
THRESHY2R TYPE STRING,
THRESHY2G TYPE STRING,
THRESHR2Y TYPE STRING,
MSGCLASS TYPE STRING,
MSGID TYPE STRING,
CUSGRPNAME TYPE STRING,
NEWCUSSTAT TYPE STRING,
VALUNIT TYPE STRING,
DECIMALS TYPE STRING,
CHG_USER TYPE STRING,
TSTMP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALPFTHRHIST_TB_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_ALPFTHRHIST_TB_STR-MTSYSID sy-vline 
WA_ALPFTHRHIST_TB_STR-MTMCNAME sy-vline 
WA_ALPFTHRHIST_TB_STR-MTNUMRANGE sy-vline 
WA_ALPFTHRHIST_TB_STR-MTUID sy-vline 
WA_ALPFTHRHIST_TB_STR-MTCLASS sy-vline 
WA_ALPFTHRHIST_TB_STR-VALFR_DATE sy-vline 
WA_ALPFTHRHIST_TB_STR-VALFR_TIME sy-vline 
WA_ALPFTHRHIST_TB_STR-TIME_ZONE sy-vline 
WA_ALPFTHRHIST_TB_STR-RELVALTYPE sy-vline 
WA_ALPFTHRHIST_TB_STR-THRESHDIR sy-vline 
WA_ALPFTHRHIST_TB_STR-THRESHG2Y sy-vline 
WA_ALPFTHRHIST_TB_STR-THRESHY2R sy-vline 
WA_ALPFTHRHIST_TB_STR-THRESHY2G sy-vline 
WA_ALPFTHRHIST_TB_STR-THRESHR2Y sy-vline 
WA_ALPFTHRHIST_TB_STR-MSGCLASS sy-vline 
WA_ALPFTHRHIST_TB_STR-MSGID sy-vline 
WA_ALPFTHRHIST_TB_STR-CUSGRPNAME sy-vline 
WA_ALPFTHRHIST_TB_STR-NEWCUSSTAT sy-vline 
WA_ALPFTHRHIST_TB_STR-VALUNIT sy-vline 
WA_ALPFTHRHIST_TB_STR-DECIMALS sy-vline 
WA_ALPFTHRHIST_TB_STR-CHG_USER sy-vline 
WA_ALPFTHRHIST_TB_STR-TSTMP sy-vline      INTO ld_text SEPARATED BY SPACE.

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