ABAP Select data from SAP table LFS_SSTN_ENVIRONMENT_UI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LFS_SSTN_ENVIRONMENT_UI
*  INTO TABLE @DATA(IT_LFS_SSTN_ENVIRONMENT_UI2).
*--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_LFS_SSTN_ENVIRONMENT_UI INDEX 1 INTO DATA(WA_LFS_SSTN_ENVIRONMENT_UI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LFS_SSTN_ENVIRONMENT_UI>-LIFNR = 1.
<LFS_SSTN_ENVIRONMENT_UI>-UUID = 1.
<LFS_SSTN_ENVIRONMENT_UI>-ENV_COMMENTS = 1.
<LFS_SSTN_ENVIRONMENT_UI>-ENV_PROTECTION = 1.
<LFS_SSTN_ENVIRONMENT_UI>-ENV_INITIATIVES = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LFS_SSTN_ENVIRONMENT_UI-ENV_TECHNOLOGY, sy-vline,
  WA_LFS_SSTN_ENVIRONMENT_UI-ENV_PROC_SYS, sy-vline,
  WA_LFS_SSTN_ENVIRONMENT_UI-ENV_FINES, sy-vline,
  WA_LFS_SSTN_ENVIRONMENT_UI-ENV_FINES_CURR, sy-vline,
  WA_LFS_SSTN_ENVIRONMENT_UI-TTL_ENR_CONS, sy-vline,
  WA_LFS_SSTN_ENVIRONMENT_UI-TTL_ENR_CONS_UN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LFS_SSTN_ENVIRONMENT_UI 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_LFS_SSTN_ENVIRONMENT_UI 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_LFS_SSTN_ENVIRONMENT_UI INTO WA_LFS_SSTN_ENVIRONMENT_UI.


*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 LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LFS_SSTN_ENVIRONMENT_UI-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFS_SSTN_ENVIRONMENT_UI-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field TTL_ENR_CONS_UN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LFS_SSTN_ENVIRONMENT_UI-TTL_ENR_CONS_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFS_SSTN_ENVIRONMENT_UI-TTL_ENR_CONS_UN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field RENEW_ENERGY_UN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LFS_SSTN_ENVIRONMENT_UI-RENEW_ENERGY_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFS_SSTN_ENVIRONMENT_UI-RENEW_ENERGY_UN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field TTL_WATER_CON_UN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LFS_SSTN_ENVIRONMENT_UI-TTL_WATER_CON_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFS_SSTN_ENVIRONMENT_UI-TTL_WATER_CON_UN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field RECYCL_WATER_UN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LFS_SSTN_ENVIRONMENT_UI-RECYCL_WATER_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFS_SSTN_ENVIRONMENT_UI-RECYCL_WATER_UN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GHG_SCOPE1_UN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LFS_SSTN_ENVIRONMENT_UI-GHG_SCOPE1_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFS_SSTN_ENVIRONMENT_UI-GHG_SCOPE1_UN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GHG_SCOPE2_UN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LFS_SSTN_ENVIRONMENT_UI-GHG_SCOPE2_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFS_SSTN_ENVIRONMENT_UI-GHG_SCOPE2_UN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GHG_SCOPE3_UN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LFS_SSTN_ENVIRONMENT_UI-GHG_SCOPE3_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFS_SSTN_ENVIRONMENT_UI-GHG_SCOPE3_UN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field WASTE_NON_HZD_UN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LFS_SSTN_ENVIRONMENT_UI-WASTE_NON_HZD_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFS_SSTN_ENVIRONMENT_UI-WASTE_NON_HZD_UN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field WASTE_HZD_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LFS_SSTN_ENVIRONMENT_UI-WASTE_HZD_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFS_SSTN_ENVIRONMENT_UI-WASTE_HZD_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field WASTE_RECYCLD_UN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LFS_SSTN_ENVIRONMENT_UI-WASTE_RECYCLD_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFS_SSTN_ENVIRONMENT_UI-WASTE_RECYCLD_UN.
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_LFS_SSTN_ENVIRONMENT_UI_STR, 
LIFNR TYPE STRING,
UUID TYPE STRING,
ENV_COMMENTS TYPE STRING,
ENV_PROTECTION TYPE STRING,
ENV_INITIATIVES TYPE STRING,
ENV_TECHNOLOGY TYPE STRING,
ENV_PROC_SYS TYPE STRING,
ENV_FINES TYPE STRING,
ENV_FINES_CURR TYPE STRING,
TTL_ENR_CONS TYPE STRING,
TTL_ENR_CONS_UN TYPE STRING,
RENEWABLE_ENERGY TYPE STRING,
RENEW_ENERGY_UN TYPE STRING,
TTL_WATER_CONS TYPE STRING,
TTL_WATER_CON_UN TYPE STRING,
RECYCLED_WATER TYPE STRING,
RECYCL_WATER_UN TYPE STRING,
GHG_SCOPE1 TYPE STRING,
GHG_SCOPE1_UN TYPE STRING,
GHG_SCOPE2 TYPE STRING,
GHG_SCOPE2_UN TYPE STRING,
GHG_SCOPE3 TYPE STRING,
GHG_SCOPE3_UN TYPE STRING,
WASTE_NON_HZD TYPE STRING,
WASTE_NON_HZD_UN TYPE STRING,
WASTE_HZD TYPE STRING,
WASTE_HZD_UNIT TYPE STRING,
WASTE_RECYCLED TYPE STRING,
WASTE_RECYCLD_UN TYPE STRING,
PER_PERSON TYPE STRING,
DUMMY3 TYPE STRING,
ENV_PROTECTION_UI TYPE STRING,
ENV_INITIATIVES_UI TYPE STRING,
ENV_TECHNOLOGY_UI TYPE STRING,
ENV_PROC_SYS_UI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LFS_SSTN_ENVIRONMENT_UI_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_LFS_SSTN_ENVIRONMENT_UI_STR-LIFNR sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-UUID sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-ENV_COMMENTS sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-ENV_PROTECTION sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-ENV_INITIATIVES sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-ENV_TECHNOLOGY sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-ENV_PROC_SYS sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-ENV_FINES sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-ENV_FINES_CURR sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-TTL_ENR_CONS sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-TTL_ENR_CONS_UN sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-RENEWABLE_ENERGY sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-RENEW_ENERGY_UN sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-TTL_WATER_CONS sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-TTL_WATER_CON_UN sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-RECYCLED_WATER sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-RECYCL_WATER_UN sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-GHG_SCOPE1 sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-GHG_SCOPE1_UN sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-GHG_SCOPE2 sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-GHG_SCOPE2_UN sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-GHG_SCOPE3 sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-GHG_SCOPE3_UN sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-WASTE_NON_HZD sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-WASTE_NON_HZD_UN sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-WASTE_HZD sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-WASTE_HZD_UNIT sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-WASTE_RECYCLED sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-WASTE_RECYCLD_UN sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-PER_PERSON sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-DUMMY3 sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-ENV_PROTECTION_UI sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-ENV_INITIATIVES_UI sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-ENV_TECHNOLOGY_UI sy-vline 
WA_LFS_SSTN_ENVIRONMENT_UI_STR-ENV_PROC_SYS_UI sy-vline      INTO ld_text SEPARATED BY SPACE.

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