ABAP Select data from SAP table /ISDFPS/ME_SEGM_EXP 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 /ISDFPS/ME_SEGM_EXP 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 /ISDFPS/ME_SEGM_EXP. 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 /ISDFPS/ME_SEGM_EXP 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_/ISDFPS/ME_SEGM_EXP TYPE STANDARD TABLE OF /ISDFPS/ME_SEGM_EXP,
      WA_/ISDFPS/ME_SEGM_EXP TYPE /ISDFPS/ME_SEGM_EXP,
      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: </ISDFPS/ME_SEGM_EXP> TYPE /ISDFPS/ME_SEGM_EXP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ISDFPS/ME_SEGM_EXP
*  INTO TABLE @DATA(IT_/ISDFPS/ME_SEGM_EXP2).
*--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_/ISDFPS/ME_SEGM_EXP INDEX 1 INTO DATA(WA_/ISDFPS/ME_SEGM_EXP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ISDFPS/ME_SEGM_EXP>-MANDT = 1.
</ISDFPS/ME_SEGM_EXP>-MBO_ID = 1.
</ISDFPS/ME_SEGM_EXP>-VERSION = 1.
</ISDFPS/ME_SEGM_EXP>-ACTIVE = 1.
</ISDFPS/ME_SEGM_EXP>-SEGM_NAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ISDFPS/ME_SEGM_EXP-SWCV_NAME, sy-vline,
  WA_/ISDFPS/ME_SEGM_EXP-MBO_NAME, sy-vline,
  WA_/ISDFPS/ME_SEGM_EXP-MBO_TRANS, sy-vline,
  WA_/ISDFPS/ME_SEGM_EXP-MBO_SEGM, sy-vline,
  WA_/ISDFPS/ME_SEGM_EXP-MIN_OCC, sy-vline,
  WA_/ISDFPS/ME_SEGM_EXP-MAX_OCC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ISDFPS/ME_SEGM_EXP 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_/ISDFPS/ME_SEGM_EXP 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_/ISDFPS/ME_SEGM_EXP INTO WA_/ISDFPS/ME_SEGM_EXP.


*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_/ISDFPS/ME_SEGM_EXP_STR, 
MANDT TYPE STRING,
MBO_ID TYPE STRING,
VERSION TYPE STRING,
ACTIVE TYPE STRING,
SEGM_NAME TYPE STRING,
SWCV_NAME TYPE STRING,
MBO_NAME TYPE STRING,
MBO_TRANS TYPE STRING,
MBO_SEGM TYPE STRING,
MIN_OCC TYPE STRING,
MAX_OCC TYPE STRING,
IS_CLNT_SPF TYPE STRING,
HIERARCHY TYPE STRING,
PSEGM_NAME TYPE STRING,
STATUS TYPE STRING,
OWNER TYPE STRING,
MOD_USER TYPE STRING,
MOD_TSTMP TYPE STRING,
DELETED TYPE STRING,
PSEGMGUID TYPE STRING,
GEN_NUM TYPE STRING,
GEN_FLAG TYPE STRING,
GEN_SEGM TYPE STRING,
SRCSYSTEM TYPE STRING,
CORR_TYPE TYPE STRING,
GEN_LANG_NODE TYPE STRING,
IS_LANG_NODE TYPE STRING,
LANG_NODE_GENNUM TYPE STRING,
NOT_DOWNLOADABLE TYPE STRING,
LINK_FIELD TYPE STRING,
BE_BF_TSTMP TYPE STRING,
BE_AF_TSTMP TYPE STRING,
P_ASCN_SEG_NAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ISDFPS/ME_SEGM_EXP_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_/ISDFPS/ME_SEGM_EXP_STR-MANDT sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-MBO_ID sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-VERSION sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-ACTIVE sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-SEGM_NAME sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-SWCV_NAME sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-MBO_NAME sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-MBO_TRANS sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-MBO_SEGM sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-MIN_OCC sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-MAX_OCC sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-IS_CLNT_SPF sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-HIERARCHY sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-PSEGM_NAME sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-STATUS sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-OWNER sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-MOD_USER sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-MOD_TSTMP sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-DELETED sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-PSEGMGUID sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-GEN_NUM sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-GEN_FLAG sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-GEN_SEGM sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-SRCSYSTEM sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-CORR_TYPE sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-GEN_LANG_NODE sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-IS_LANG_NODE sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-LANG_NODE_GENNUM sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-NOT_DOWNLOADABLE sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-LINK_FIELD sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-BE_BF_TSTMP sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-BE_AF_TSTMP sy-vline 
WA_/ISDFPS/ME_SEGM_EXP_STR-P_ASCN_SEG_NAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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