ABAP Select data from SAP table REXCC_PT_IMI_POSTPAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCC_PT_IMI_POSTPAR
*  INTO TABLE @DATA(IT_REXCC_PT_IMI_POSTPAR2).
*--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_REXCC_PT_IMI_POSTPAR INDEX 1 INTO DATA(WA_REXCC_PT_IMI_POSTPAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXCC_PT_IMI_POSTPAR>-MANDT = 1.
<REXCC_PT_IMI_POSTPAR>-FISCYEAR = 1.
<REXCC_PT_IMI_POSTPAR>-FIRSTINSTDATE = 1.
<REXCC_PT_IMI_POSTPAR>-SECINSTDATE = 1.
<REXCC_PT_IMI_POSTPAR>-THIRDINSTDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXCC_PT_IMI_POSTPAR-ACCRDAY, sy-vline,
  WA_REXCC_PT_IMI_POSTPAR-INSTLIMIT, sy-vline,
  WA_REXCC_PT_IMI_POSTPAR-INSTLIMIT2, sy-vline,
  WA_REXCC_PT_IMI_POSTPAR-CURRENCY, sy-vline,
  WA_REXCC_PT_IMI_POSTPAR-RECNTYPE, sy-vline,
  WA_REXCC_PT_IMI_POSTPAR-CONDTYPE_ACCR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXCC_PT_IMI_POSTPAR 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_REXCC_PT_IMI_POSTPAR 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_REXCC_PT_IMI_POSTPAR INTO WA_REXCC_PT_IMI_POSTPAR.


*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 GJAHR, internal->external for field FISCYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_REXCC_PT_IMI_POSTPAR-FISCYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCC_PT_IMI_POSTPAR-FISCYEAR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field CONDTYPE_INST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCC_PT_IMI_POSTPAR-CONDTYPE_INST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCC_PT_IMI_POSTPAR-CONDTYPE_INST.
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_REXCC_PT_IMI_POSTPAR_STR, 
MANDT TYPE STRING,
FISCYEAR TYPE STRING,
FIRSTINSTDATE TYPE STRING,
SECINSTDATE TYPE STRING,
THIRDINSTDATE TYPE STRING,
ACCRDAY TYPE STRING,
INSTLIMIT TYPE STRING,
INSTLIMIT2 TYPE STRING,
CURRENCY TYPE STRING,
RECNTYPE TYPE STRING,
CONDTYPE_ACCR TYPE STRING,
CONDTYPE_INST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXCC_PT_IMI_POSTPAR_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_REXCC_PT_IMI_POSTPAR_STR-MANDT sy-vline 
WA_REXCC_PT_IMI_POSTPAR_STR-FISCYEAR sy-vline 
WA_REXCC_PT_IMI_POSTPAR_STR-FIRSTINSTDATE sy-vline 
WA_REXCC_PT_IMI_POSTPAR_STR-SECINSTDATE sy-vline 
WA_REXCC_PT_IMI_POSTPAR_STR-THIRDINSTDATE sy-vline 
WA_REXCC_PT_IMI_POSTPAR_STR-ACCRDAY sy-vline 
WA_REXCC_PT_IMI_POSTPAR_STR-INSTLIMIT sy-vline 
WA_REXCC_PT_IMI_POSTPAR_STR-INSTLIMIT2 sy-vline 
WA_REXCC_PT_IMI_POSTPAR_STR-CURRENCY sy-vline 
WA_REXCC_PT_IMI_POSTPAR_STR-RECNTYPE sy-vline 
WA_REXCC_PT_IMI_POSTPAR_STR-CONDTYPE_ACCR sy-vline 
WA_REXCC_PT_IMI_POSTPAR_STR-CONDTYPE_INST sy-vline      INTO ld_text SEPARATED BY SPACE.

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