ABAP Select data from SAP table HRI1794 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP HRI1794 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 HRI1794. 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 HRI1794 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_HRI1794 TYPE STANDARD TABLE OF HRI1794,
      WA_HRI1794 TYPE HRI1794,
      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: <HRI1794> TYPE HRI1794.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_HRI1794.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM HRI1794
  INTO TABLE IT_HRI1794.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRI1794
*  INTO TABLE @DATA(IT_HRI17942).
*--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_HRI1794 INDEX 1 INTO DATA(WA_HRI17942).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_HRI1794 ASSIGNING <HRI1794>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRI1794>-CENTRE_ID = 1.
<HRI1794>-CENTRE_NAME = 1.
<HRI1794>-SCH_STATUS = 1.
<HRI1794>-GEN_CODE = 1.
<HRI1794>-CENTR_TYP = 1.

ENDLOOP.

LOOP AT IT_HRI1794 INTO WA_HRI1794.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRI1794-SCH_NTR, sy-vline,
  WA_HRI1794-SCH_TYP, sy-vline,
  WA_HRI1794-OWNR_NIF, sy-vline,
  WA_HRI1794-NIF, sy-vline,
  WA_HRI1794-GRPNG, sy-vline,
  WA_HRI1794-ORDER_NO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRI1794 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_HRI1794 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_HRI1794 INTO WA_HRI1794.


*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_HRI1794_STR, 
CENTRE_ID TYPE STRING,
CENTRE_NAME TYPE STRING,
SCH_STATUS TYPE STRING,
GEN_CODE TYPE STRING,
CENTR_TYP TYPE STRING,
SCH_NTR TYPE STRING,
SCH_TYP TYPE STRING,
OWNR_NIF TYPE STRING,
NIF TYPE STRING,
GRPNG TYPE STRING,
ORDER_NO TYPE STRING,
RULE_DAT TYPE STRING,
PBLCTN_DAT TYPE STRING,
MGZN_TYP TYPE STRING,
DSBLTY_TYP TYPE STRING,
BILINGUAL TYPE STRING,
BRTSH_AGRMNT TYPE STRING,
FSE_CNFNCD TYPE STRING,
MIN_IDENTIFIER TYPE STRING,
NIF_SCH_CNTR TYPE STRING,
OWNR_ENT TYPE STRING,
RANGE_REG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRI1794_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_HRI1794_STR-CENTRE_ID sy-vline 
WA_HRI1794_STR-CENTRE_NAME sy-vline 
WA_HRI1794_STR-SCH_STATUS sy-vline 
WA_HRI1794_STR-GEN_CODE sy-vline 
WA_HRI1794_STR-CENTR_TYP sy-vline 
WA_HRI1794_STR-SCH_NTR sy-vline 
WA_HRI1794_STR-SCH_TYP sy-vline 
WA_HRI1794_STR-OWNR_NIF sy-vline 
WA_HRI1794_STR-NIF sy-vline 
WA_HRI1794_STR-GRPNG sy-vline 
WA_HRI1794_STR-ORDER_NO sy-vline 
WA_HRI1794_STR-RULE_DAT sy-vline 
WA_HRI1794_STR-PBLCTN_DAT sy-vline 
WA_HRI1794_STR-MGZN_TYP sy-vline 
WA_HRI1794_STR-DSBLTY_TYP sy-vline 
WA_HRI1794_STR-BILINGUAL sy-vline 
WA_HRI1794_STR-BRTSH_AGRMNT sy-vline 
WA_HRI1794_STR-FSE_CNFNCD sy-vline 
WA_HRI1794_STR-MIN_IDENTIFIER sy-vline 
WA_HRI1794_STR-NIF_SCH_CNTR sy-vline 
WA_HRI1794_STR-OWNR_ENT sy-vline 
WA_HRI1794_STR-RANGE_REG sy-vline      INTO ld_text SEPARATED BY SPACE.

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