ABAP Select data from SAP table /ECRS/POIA_OBJ_S into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ECRS/POIA_OBJ_S
*  INTO TABLE @DATA(IT_/ECRS/POIA_OBJ_S2).
*--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_/ECRS/POIA_OBJ_S INDEX 1 INTO DATA(WA_/ECRS/POIA_OBJ_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ECRS/POIA_OBJ_S>-MANDT = 1.
</ECRS/POIA_OBJ_S>-POIID = 1.
</ECRS/POIA_OBJ_S>-RPCTY = 1.
</ECRS/POIA_OBJ_S>-BUKRS = 1.
</ECRS/POIA_OBJ_S>-POIAD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ECRS/POIA_OBJ_S-EXCHT, sy-vline,
  WA_/ECRS/POIA_OBJ_S-RPLE1, sy-vline,
  WA_/ECRS/POIA_OBJ_S-RPLE2, sy-vline,
  WA_/ECRS/POIA_OBJ_S-GFFID, sy-vline,
  WA_/ECRS/POIA_OBJ_S-COLCE, sy-vline,
  WA_/ECRS/POIA_OBJ_S-FDTOF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ECRS/POIA_OBJ_S 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_/ECRS/POIA_OBJ_S 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_/ECRS/POIA_OBJ_S INTO WA_/ECRS/POIA_OBJ_S.


*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 POIID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ECRS/POIA_OBJ_S-POIID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ECRS/POIA_OBJ_S-POIID.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field TPDNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ECRS/POIA_OBJ_S-TPDNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ECRS/POIA_OBJ_S-TPDNO.
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_/ECRS/POIA_OBJ_S_STR, 
MANDT TYPE STRING,
POIID TYPE STRING,
RPCTY TYPE STRING,
BUKRS TYPE STRING,
POIAD TYPE STRING,
EXCHT TYPE STRING,
RPLE1 TYPE STRING,
RPLE2 TYPE STRING,
GFFID TYPE STRING,
COLCE TYPE STRING,
FDTOF TYPE STRING,
STENR TYPE STRING,
MTNUM TYPE STRING,
MTNU2 TYPE STRING,
AUTNR TYPE STRING,
AUTCO TYPE STRING,
REGNR TYPE STRING,
REGON TYPE STRING,
IAGID TYPE STRING,
POICP TYPE STRING,
POISG TYPE STRING,
TPDNO TYPE STRING,
CRTBY TYPE STRING,
CRTTS TYPE STRING,
LCHBY TYPE STRING,
LCHTS TYPE STRING,
POIC TYPE STRING,
CPNAM TYPE STRING,
CP_NAMLAST TYPE STRING,
CP_NAMFIRST TYPE STRING,
CPSTN TYPE STRING,
CPPOC TYPE STRING,
CPCIT TYPE STRING,
CPPHO TYPE STRING,
CPMPN TYPE STRING,
CPFAX TYPE STRING,
CPEML TYPE STRING,
SGNAM TYPE STRING,
SGPHO TYPE STRING,
SGEML TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ECRS/POIA_OBJ_S_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_/ECRS/POIA_OBJ_S_STR-MANDT sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-POIID sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-RPCTY sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-BUKRS sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-POIAD sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-EXCHT sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-RPLE1 sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-RPLE2 sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-GFFID sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-COLCE sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-FDTOF sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-STENR sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-MTNUM sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-MTNU2 sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-AUTNR sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-AUTCO sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-REGNR sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-REGON sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-IAGID sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-POICP sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-POISG sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-TPDNO sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-CRTBY sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-CRTTS sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-LCHBY sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-LCHTS sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-POIC sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-CPNAM sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-CP_NAMLAST sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-CP_NAMFIRST sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-CPSTN sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-CPPOC sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-CPCIT sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-CPPHO sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-CPMPN sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-CPFAX sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-CPEML sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-SGNAM sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-SGPHO sy-vline 
WA_/ECRS/POIA_OBJ_S_STR-SGEML sy-vline      INTO ld_text SEPARATED BY SPACE.

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