ABAP Select data from SAP table PMRHB8 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PMRHB8 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 PMRHB8. 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 PMRHB8 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_PMRHB8 TYPE STANDARD TABLE OF PMRHB8,
      WA_PMRHB8 TYPE PMRHB8,
      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: <PMRHB8> TYPE PMRHB8.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PMRHB8.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PMRHB8
  INTO TABLE IT_PMRHB8.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMRHB8
*  INTO TABLE @DATA(IT_PMRHB82).
*--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_PMRHB8 INDEX 1 INTO DATA(WA_PMRHB82).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PMRHB8 ASSIGNING <PMRHB8>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMRHB8>-BUTGR = 1.
<PMRHB8>-BUTYP = 1.
<PMRHB8>-BUTYPT = 1.
<PMRHB8>-SHORT = 1.
<PMRHB8>-STEXT = 1.

ENDLOOP.

LOOP AT IT_PMRHB8 INTO WA_PMRHB8.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMRHB8-BEGDA, sy-vline,
  WA_PMRHB8-ENDDA, sy-vline,
  WA_PMRHB8-TRFNAME, sy-vline,
  WA_PMRHB8-BETRG, sy-vline,
  WA_PMRHB8-WAERS, sy-vline,
  WA_PMRHB8-FREQ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMRHB8 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_PMRHB8 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_PMRHB8 INTO WA_PMRHB8.


*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_PMRHB8_STR, 
BUTGR TYPE STRING,
BUTYP TYPE STRING,
BUTYPT TYPE STRING,
SHORT TYPE STRING,
STEXT TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
TRFNAME TYPE STRING,
BETRG TYPE STRING,
WAERS TYPE STRING,
FREQ TYPE STRING,
AMNT TYPE STRING,
UNIT TYPE STRING,
BELNR TYPE STRING,
OBJID TYPE STRING,
AKTE TYPE STRING,
KOMM TYPE STRING,
GREDT1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMRHB8_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_PMRHB8_STR-BUTGR sy-vline 
WA_PMRHB8_STR-BUTYP sy-vline 
WA_PMRHB8_STR-BUTYPT sy-vline 
WA_PMRHB8_STR-SHORT sy-vline 
WA_PMRHB8_STR-STEXT sy-vline 
WA_PMRHB8_STR-BEGDA sy-vline 
WA_PMRHB8_STR-ENDDA sy-vline 
WA_PMRHB8_STR-TRFNAME sy-vline 
WA_PMRHB8_STR-BETRG sy-vline 
WA_PMRHB8_STR-WAERS sy-vline 
WA_PMRHB8_STR-FREQ sy-vline 
WA_PMRHB8_STR-AMNT sy-vline 
WA_PMRHB8_STR-UNIT sy-vline 
WA_PMRHB8_STR-BELNR sy-vline 
WA_PMRHB8_STR-OBJID sy-vline 
WA_PMRHB8_STR-AKTE sy-vline 
WA_PMRHB8_STR-KOMM sy-vline 
WA_PMRHB8_STR-GREDT1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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