ABAP Select data from SAP table FMCE_S_MAINT_SCREEN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMCE_S_MAINT_SCREEN
*  INTO TABLE @DATA(IT_FMCE_S_MAINT_SCREEN2).
*--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_FMCE_S_MAINT_SCREEN INDEX 1 INTO DATA(WA_FMCE_S_MAINT_SCREEN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMCE_S_MAINT_SCREEN>-FM_AREA = 1.
<FMCE_S_MAINT_SCREEN>-FISCYEAR = 1.
<FMCE_S_MAINT_SCREEN>-CEFFYEAR = 1.
<FMCE_S_MAINT_SCREEN>-BUDCAT = 1.
<FMCE_S_MAINT_SCREEN>-BUDCAT_TEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMCE_S_MAINT_SCREEN-CVRGRP, sy-vline,
  WA_FMCE_S_MAINT_SCREEN-TEXT, sy-vline,
  WA_FMCE_S_MAINT_SCREEN-CGAUTOIND, sy-vline,
  WA_FMCE_S_MAINT_SCREEN-ALDNR, sy-vline,
  WA_FMCE_S_MAINT_SCREEN-ALDNR_TEXT, sy-vline,
  WA_FMCE_S_MAINT_SCREEN-BM_RECEIVER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMCE_S_MAINT_SCREEN 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_FMCE_S_MAINT_SCREEN 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_FMCE_S_MAINT_SCREEN INTO WA_FMCE_S_MAINT_SCREEN.


*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_FMCE_S_MAINT_SCREEN-FISCYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMCE_S_MAINT_SCREEN-FISCYEAR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit FMCIL, internal->external for field CMMTITEM
CALL FUNCTION 'CONVERSION_EXIT_FMCIL_OUTPUT'
  EXPORTING
    input =                      WA_FMCE_S_MAINT_SCREEN-CMMTITEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMCE_S_MAINT_SCREEN-CMMTITEM.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field OTHER_ADDR_GRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FMCE_S_MAINT_SCREEN-OTHER_ADDR_GRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMCE_S_MAINT_SCREEN-OTHER_ADDR_GRANT_NBR.
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_FMCE_S_MAINT_SCREEN_STR, 
FM_AREA TYPE STRING,
FISCYEAR TYPE STRING,
CEFFYEAR TYPE STRING,
BUDCAT TYPE STRING,
BUDCAT_TEXT TYPE STRING,
CVRGRP TYPE STRING,
TEXT TYPE STRING,
CGAUTOIND TYPE STRING,
ALDNR TYPE STRING,
ALDNR_TEXT TYPE STRING,
BM_RECEIVER TYPE STRING,
BM_SENDER TYPE STRING,
BM_REC_AND_SEN TYPE STRING,
CRTUSER TYPE STRING,
CRTDATE TYPE STRING,
CRTTIME TYPE STRING,
CHGUSER TYPE STRING,
CHGDATE TYPE STRING,
CHGTIME TYPE STRING,
ACCESS_BY_CG TYPE STRING,
ACCESS_BY_BA TYPE STRING,
FUND TYPE STRING,
FUNDSCTR TYPE STRING,
CMMTITEM TYPE STRING,
FUNCAREA TYPE STRING,
GRANT_NBR TYPE STRING,
MEASURE TYPE STRING,
USERDIM TYPE STRING,
BUDGET_PD TYPE STRING,
RBBLDNR TYPE STRING,
RBBLDNR_TEXT TYPE STRING,
OTHER_ADDR_OBJNR TYPE STRING,
OTHER_ADDR_GRANT_NBR TYPE STRING,
OTHER_ADDR_TEXT TYPE STRING,
AUTHGRP TYPE STRING,
CGWITHGRANT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMCE_S_MAINT_SCREEN_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_FMCE_S_MAINT_SCREEN_STR-FM_AREA sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-FISCYEAR sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-CEFFYEAR sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-BUDCAT sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-BUDCAT_TEXT sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-CVRGRP sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-TEXT sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-CGAUTOIND sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-ALDNR sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-ALDNR_TEXT sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-BM_RECEIVER sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-BM_SENDER sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-BM_REC_AND_SEN sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-CRTUSER sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-CRTDATE sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-CRTTIME sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-CHGUSER sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-CHGDATE sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-CHGTIME sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-ACCESS_BY_CG sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-ACCESS_BY_BA sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-FUND sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-FUNDSCTR sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-CMMTITEM sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-FUNCAREA sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-GRANT_NBR sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-MEASURE sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-USERDIM sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-BUDGET_PD sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-RBBLDNR sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-RBBLDNR_TEXT sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-OTHER_ADDR_OBJNR sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-OTHER_ADDR_GRANT_NBR sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-OTHER_ADDR_TEXT sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-AUTHGRP sy-vline 
WA_FMCE_S_MAINT_SCREEN_STR-CGWITHGRANT sy-vline      INTO ld_text SEPARATED BY SPACE.

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