ABAP Select data from SAP table /PMG/GE_REC_CORR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /PMG/GE_REC_CORR 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 /PMG/GE_REC_CORR. 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 /PMG/GE_REC_CORR 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_/PMG/GE_REC_CORR TYPE STANDARD TABLE OF /PMG/GE_REC_CORR,
      WA_/PMG/GE_REC_CORR TYPE /PMG/GE_REC_CORR,
      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: </PMG/GE_REC_CORR> TYPE /PMG/GE_REC_CORR.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /PMG/GE_REC_CORR
  INTO TABLE IT_/PMG/GE_REC_CORR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /PMG/GE_REC_CORR
*  INTO TABLE @DATA(IT_/PMG/GE_REC_CORR2).
*--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_/PMG/GE_REC_CORR INDEX 1 INTO DATA(WA_/PMG/GE_REC_CORR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/PMG/GE_REC_CORR ASSIGNING </PMG/GE_REC_CORR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</PMG/GE_REC_CORR>-CLIENT = 1.
</PMG/GE_REC_CORR>-REC_CORR_RUN_ID = 1.
</PMG/GE_REC_CORR>-REC_CORR_EXEC_ID = 1.
</PMG/GE_REC_CORR>-MPONUM_VL = 1.
</PMG/GE_REC_CORR>-COTYP = 1.

ENDLOOP.

LOOP AT IT_/PMG/GE_REC_CORR INTO WA_/PMG/GE_REC_CORR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/PMG/GE_REC_CORR-REC_COR_FREQ, sy-vline,
  WA_/PMG/GE_REC_CORR-OCCURRENCE_DATE, sy-vline,
  WA_/PMG/GE_REC_CORR-RUN_ID_TT, sy-vline,
  WA_/PMG/GE_REC_CORR-DOCSTATE_CD, sy-vline,
  WA_/PMG/GE_REC_CORR-DOCNR_TT, sy-vline,
  WA_/PMG/GE_REC_CORR-DUMMY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/PMG/GE_REC_CORR 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_/PMG/GE_REC_CORR 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_/PMG/GE_REC_CORR INTO WA_/PMG/GE_REC_CORR.


*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 MPONUM_VL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PMG/GE_REC_CORR-MPONUM_VL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PMG/GE_REC_CORR-MPONUM_VL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCNR_TT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PMG/GE_REC_CORR-DOCNR_TT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PMG/GE_REC_CORR-DOCNR_TT.
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_/PMG/GE_REC_CORR_STR, 
CLIENT TYPE STRING,
REC_CORR_RUN_ID TYPE STRING,
REC_CORR_EXEC_ID TYPE STRING,
MPONUM_VL TYPE STRING,
COTYP TYPE STRING,
REC_COR_FREQ TYPE STRING,
OCCURRENCE_DATE TYPE STRING,
RUN_ID_TT TYPE STRING,
DOCSTATE_CD TYPE STRING,
DOCNR_TT TYPE STRING,
DUMMY TYPE STRING,
UNAME TYPE STRING,
CDATE TYPE STRING,
CTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/PMG/GE_REC_CORR_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_/PMG/GE_REC_CORR_STR-CLIENT sy-vline 
WA_/PMG/GE_REC_CORR_STR-REC_CORR_RUN_ID sy-vline 
WA_/PMG/GE_REC_CORR_STR-REC_CORR_EXEC_ID sy-vline 
WA_/PMG/GE_REC_CORR_STR-MPONUM_VL sy-vline 
WA_/PMG/GE_REC_CORR_STR-COTYP sy-vline 
WA_/PMG/GE_REC_CORR_STR-REC_COR_FREQ sy-vline 
WA_/PMG/GE_REC_CORR_STR-OCCURRENCE_DATE sy-vline 
WA_/PMG/GE_REC_CORR_STR-RUN_ID_TT sy-vline 
WA_/PMG/GE_REC_CORR_STR-DOCSTATE_CD sy-vline 
WA_/PMG/GE_REC_CORR_STR-DOCNR_TT sy-vline 
WA_/PMG/GE_REC_CORR_STR-DUMMY sy-vline 
WA_/PMG/GE_REC_CORR_STR-UNAME sy-vline 
WA_/PMG/GE_REC_CORR_STR-CDATE sy-vline 
WA_/PMG/GE_REC_CORR_STR-CTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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