ABAP Select data from SAP table PCMO4B into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP PCMO4B 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 PCMO4B. 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 PCMO4B 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_PCMO4B TYPE STANDARD TABLE OF PCMO4B,
      WA_PCMO4B TYPE PCMO4B,
      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: <PCMO4B> TYPE PCMO4B.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PCMO4B.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PCMO4B
  INTO TABLE IT_PCMO4B.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PCMO4B
*  INTO TABLE @DATA(IT_PCMO4B2).
*--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_PCMO4B INDEX 1 INTO DATA(WA_PCMO4B2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PCMO4B ASSIGNING <PCMO4B>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PCMO4B>-MANDT = 1.
<PCMO4B>-PCMNR = 1.
<PCMO4B>-ZAEHL = 1.
<PCMO4B>-ERNAM = 1.
<PCMO4B>-ERDAT = 1.

ENDLOOP.

LOOP AT IT_PCMO4B INTO WA_PCMO4B.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PCMO4B-AENAM, sy-vline,
  WA_PCMO4B-AEDAT, sy-vline,
  WA_PCMO4B-OBJTY, sy-vline,
  WA_PCMO4B-NETID, sy-vline,
  WA_PCMO4B-NNAME, sy-vline,
  WA_PCMO4B-MENGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PCMO4B 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_PCMO4B 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_PCMO4B INTO WA_PCMO4B.


*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.

*Conversion exit ALPHA, internal->external for field PCMNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PCMO4B-PCMNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PCMO4B-PCMNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PCMO4B-GEMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PCMO4B-GEMEIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AENNR_AUS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PCMO4B-AENNR_AUS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PCMO4B-AENNR_AUS.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PCMO4B_STR, 
MANDT TYPE STRING,
PCMNR TYPE STRING,
ZAEHL TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
OBJTY TYPE STRING,
NETID TYPE STRING,
NNAME TYPE STRING,
MENGE TYPE STRING,
GEMEIN TYPE STRING,
VBKZ TYPE STRING,
DATUB TYPE STRING,
AENNR_AUS TYPE STRING,
FLG_SEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PCMO4B_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_PCMO4B_STR-MANDT sy-vline 
WA_PCMO4B_STR-PCMNR sy-vline 
WA_PCMO4B_STR-ZAEHL sy-vline 
WA_PCMO4B_STR-ERNAM sy-vline 
WA_PCMO4B_STR-ERDAT sy-vline 
WA_PCMO4B_STR-AENAM sy-vline 
WA_PCMO4B_STR-AEDAT sy-vline 
WA_PCMO4B_STR-OBJTY sy-vline 
WA_PCMO4B_STR-NETID sy-vline 
WA_PCMO4B_STR-NNAME sy-vline 
WA_PCMO4B_STR-MENGE sy-vline 
WA_PCMO4B_STR-GEMEIN sy-vline 
WA_PCMO4B_STR-VBKZ sy-vline 
WA_PCMO4B_STR-DATUB sy-vline 
WA_PCMO4B_STR-AENNR_AUS sy-vline 
WA_PCMO4B_STR-FLG_SEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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