ABAP Select data from SAP table HCMFAB_S_PERS_VH_SCHOOL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HCMFAB_S_PERS_VH_SCHOOL
*  INTO TABLE @DATA(IT_HCMFAB_S_PERS_VH_SCHOOL2).
*--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_HCMFAB_S_PERS_VH_SCHOOL INDEX 1 INTO DATA(WA_HCMFAB_S_PERS_VH_SCHOOL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HCMFAB_S_PERS_VH_SCHOOL>-HCMFAB_PERNR = 1.
<HCMFAB_S_PERS_VH_SCHOOL>-HCMFAB_INFTY = 1.
<HCMFAB_S_PERS_VH_SCHOOL>-HCMFAB_SUBTY = 1.
<HCMFAB_S_PERS_VH_SCHOOL>-HCMFAB_OBJPS = 1.
<HCMFAB_S_PERS_VH_SCHOOL>-HCMFAB_SPRPS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HCMFAB_S_PERS_VH_SCHOOL-HCMFAB_ENDDA, sy-vline,
  WA_HCMFAB_S_PERS_VH_SCHOOL-HCMFAB_BEGDA, sy-vline,
  WA_HCMFAB_S_PERS_VH_SCHOOL-HCMFAB_SEQNR, sy-vline,
  WA_HCMFAB_S_PERS_VH_SCHOOL-SCHUID, sy-vline,
  WA_HCMFAB_S_PERS_VH_SCHOOL-ENDDA, sy-vline,
  WA_HCMFAB_S_PERS_VH_SCHOOL-BEGDA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HCMFAB_S_PERS_VH_SCHOOL 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_HCMFAB_S_PERS_VH_SCHOOL 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_HCMFAB_S_PERS_VH_SCHOOL INTO WA_HCMFAB_S_PERS_VH_SCHOOL.


*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_HCMFAB_S_PERS_VH_SCHOOL_STR, 
HCMFAB_PERNR TYPE STRING,
HCMFAB_INFTY TYPE STRING,
HCMFAB_SUBTY TYPE STRING,
HCMFAB_OBJPS TYPE STRING,
HCMFAB_SPRPS TYPE STRING,
HCMFAB_ENDDA TYPE STRING,
HCMFAB_BEGDA TYPE STRING,
HCMFAB_SEQNR TYPE STRING,
SCHUID TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
NAME_E TYPE STRING,
NAME_A TYPE STRING,
ELEG TYPE STRING,
PER1 TYPE STRING,
AMT1 TYPE STRING,
PER2 TYPE STRING,
AMT2 TYPE STRING,
PER3 TYPE STRING,
AMT3 TYPE STRING,
PER4 TYPE STRING,
AMT4 TYPE STRING,
PER5 TYPE STRING,
AMT5 TYPE STRING,
PER6 TYPE STRING,
AMT6 TYPE STRING,
PER7 TYPE STRING,
AMT7 TYPE STRING,
PER8 TYPE STRING,
AMT8 TYPE STRING,
PER9 TYPE STRING,
AMT9 TYPE STRING,
PER10 TYPE STRING,
AMT10 TYPE STRING,
PER11 TYPE STRING,
AMT11 TYPE STRING,
PER12 TYPE STRING,
AMT12 TYPE STRING,
WAERS TYPE STRING,
VERSIONID TYPE STRING,
FIELDNAME TYPE STRING,
MAPPED_FIELDNAMES TYPE STRING,
IS_SEARCHHELP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HCMFAB_S_PERS_VH_SCHOOL_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_HCMFAB_S_PERS_VH_SCHOOL_STR-HCMFAB_PERNR sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-HCMFAB_INFTY sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-HCMFAB_SUBTY sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-HCMFAB_OBJPS sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-HCMFAB_SPRPS sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-HCMFAB_ENDDA sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-HCMFAB_BEGDA sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-HCMFAB_SEQNR sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-SCHUID sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-ENDDA sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-BEGDA sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-NAME_E sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-NAME_A sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-ELEG sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-PER1 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-AMT1 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-PER2 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-AMT2 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-PER3 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-AMT3 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-PER4 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-AMT4 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-PER5 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-AMT5 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-PER6 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-AMT6 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-PER7 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-AMT7 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-PER8 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-AMT8 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-PER9 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-AMT9 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-PER10 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-AMT10 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-PER11 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-AMT11 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-PER12 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-AMT12 sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-WAERS sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-VERSIONID sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-FIELDNAME sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-MAPPED_FIELDNAMES sy-vline 
WA_HCMFAB_S_PERS_VH_SCHOOL_STR-IS_SEARCHHELP sy-vline      INTO ld_text SEPARATED BY SPACE.

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