ABAP Select data from SAP table LFSSTN 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 LFSSTN 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 LFSSTN. 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 LFSSTN 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_LFSSTN TYPE STANDARD TABLE OF LFSSTN,
      WA_LFSSTN TYPE LFSSTN,
      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: <LFSSTN> TYPE LFSSTN.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LFSSTN
*  INTO TABLE @DATA(IT_LFSSTN2).
*--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_LFSSTN INDEX 1 INTO DATA(WA_LFSSTN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LFSSTN>-MANDT = 1.
<LFSSTN>-LIFNR = 1.
<LFSSTN>-UUID = 1.
<LFSSTN>-LIFNR_SUST_ID = 1.
<LFSSTN>-CREATED_BY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LFSSTN-CHANGED_BY, sy-vline,
  WA_LFSSTN-CREATED_ON, sy-vline,
  WA_LFSSTN-LAST_CHANGED_ON, sy-vline,
  WA_LFSSTN-VALIDITY_START, sy-vline,
  WA_LFSSTN-VALIDITY_END, sy-vline,
  WA_LFSSTN-AUDIT_AGENCY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LFSSTN 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_LFSSTN 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_LFSSTN INTO WA_LFSSTN.


*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_LFSSTN-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFSSTN-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_LFSSTN-TTL_ENR_CONS_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFSSTN-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_LFSSTN-RENEW_ENERGY_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFSSTN-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_LFSSTN-TTL_WATER_CON_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFSSTN-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_LFSSTN-RECYCL_WATER_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFSSTN-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_LFSSTN-GHG_SCOPE1_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFSSTN-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_LFSSTN-GHG_SCOPE2_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFSSTN-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_LFSSTN-GHG_SCOPE3_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFSSTN-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_LFSSTN-WASTE_NON_HZD_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFSSTN-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_LFSSTN-WASTE_HZD_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFSSTN-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_LFSSTN-WASTE_RECYCLD_UN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LFSSTN-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_LFSSTN_STR, 
MANDT TYPE STRING,
LIFNR TYPE STRING,
UUID TYPE STRING,
LIFNR_SUST_ID TYPE STRING,
CREATED_BY TYPE STRING,
CHANGED_BY TYPE STRING,
CREATED_ON TYPE STRING,
LAST_CHANGED_ON TYPE STRING,
VALIDITY_START TYPE STRING,
VALIDITY_END TYPE STRING,
AUDIT_AGENCY TYPE STRING,
AUDIT_CONDUCT_ON TYPE STRING,
SUPP_COC TYPE STRING,
SUPP_COC_DATE TYPE STRING,
SUST_REPORT TYPE STRING,
SUST_RPT_RATING TYPE STRING,
SUST_REPORT_DATE TYPE STRING,
DEL_FLAG TYPE STRING,
OVERALL_SCORE TYPE STRING,
TOT_RESP_SCORE TYPE STRING,
TOT_ENV_SCORE TYPE STRING,
TOT_ECO_SCORE TYPE STRING,
SOC_COMMENTS TYPE STRING,
SOC_PROC_SYS TYPE STRING,
HUMAN_RIGHTS TYPE STRING,
HEALTH_SAFETY TYPE STRING,
SOC_FINES TYPE STRING,
SOC_FINES_CURR TYPE STRING,
DISCRIMINATION TYPE STRING,
CHILD_LABOUR TYPE STRING,
FORCED_LABOUR TYPE STRING,
COL_BARGAINING TYPE STRING,
ANTI_CORRUPTION TYPE STRING,
WOMEN_OWNED TYPE STRING,
WOM_OWNED_EXP TYPE STRING,
MINORITY_OWNED TYPE STRING,
MIN_OWNED_EXP 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,
TOTAL_SPEND TYPE STRING,
TOTAL_SPEND_CURR TYPE STRING,
TOTAL_REVENUE TYPE STRING,
TOT_REVENUE_CURR TYPE STRING,
EMPLOYEE_COUNT TYPE STRING,
TOTAL_RISK TYPE STRING,
FINANCIAL_RISK TYPE STRING,
LOGISTICAL_RISK TYPE STRING,
QUALITY_RISK TYPE STRING,
POLITICAL_RISK TYPE STRING,
DUMMY_EEW_SSTN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LFSSTN_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_LFSSTN_STR-MANDT sy-vline 
WA_LFSSTN_STR-LIFNR sy-vline 
WA_LFSSTN_STR-UUID sy-vline 
WA_LFSSTN_STR-LIFNR_SUST_ID sy-vline 
WA_LFSSTN_STR-CREATED_BY sy-vline 
WA_LFSSTN_STR-CHANGED_BY sy-vline 
WA_LFSSTN_STR-CREATED_ON sy-vline 
WA_LFSSTN_STR-LAST_CHANGED_ON sy-vline 
WA_LFSSTN_STR-VALIDITY_START sy-vline 
WA_LFSSTN_STR-VALIDITY_END sy-vline 
WA_LFSSTN_STR-AUDIT_AGENCY sy-vline 
WA_LFSSTN_STR-AUDIT_CONDUCT_ON sy-vline 
WA_LFSSTN_STR-SUPP_COC sy-vline 
WA_LFSSTN_STR-SUPP_COC_DATE sy-vline 
WA_LFSSTN_STR-SUST_REPORT sy-vline 
WA_LFSSTN_STR-SUST_RPT_RATING sy-vline 
WA_LFSSTN_STR-SUST_REPORT_DATE sy-vline 
WA_LFSSTN_STR-DEL_FLAG sy-vline 
WA_LFSSTN_STR-OVERALL_SCORE sy-vline 
WA_LFSSTN_STR-TOT_RESP_SCORE sy-vline 
WA_LFSSTN_STR-TOT_ENV_SCORE sy-vline 
WA_LFSSTN_STR-TOT_ECO_SCORE sy-vline 
WA_LFSSTN_STR-SOC_COMMENTS sy-vline 
WA_LFSSTN_STR-SOC_PROC_SYS sy-vline 
WA_LFSSTN_STR-HUMAN_RIGHTS sy-vline 
WA_LFSSTN_STR-HEALTH_SAFETY sy-vline 
WA_LFSSTN_STR-SOC_FINES sy-vline 
WA_LFSSTN_STR-SOC_FINES_CURR sy-vline 
WA_LFSSTN_STR-DISCRIMINATION sy-vline 
WA_LFSSTN_STR-CHILD_LABOUR sy-vline 
WA_LFSSTN_STR-FORCED_LABOUR sy-vline 
WA_LFSSTN_STR-COL_BARGAINING sy-vline 
WA_LFSSTN_STR-ANTI_CORRUPTION sy-vline 
WA_LFSSTN_STR-WOMEN_OWNED sy-vline 
WA_LFSSTN_STR-WOM_OWNED_EXP sy-vline 
WA_LFSSTN_STR-MINORITY_OWNED sy-vline 
WA_LFSSTN_STR-MIN_OWNED_EXP sy-vline 
WA_LFSSTN_STR-ENV_COMMENTS sy-vline 
WA_LFSSTN_STR-ENV_PROTECTION sy-vline 
WA_LFSSTN_STR-ENV_INITIATIVES sy-vline 
WA_LFSSTN_STR-ENV_TECHNOLOGY sy-vline 
WA_LFSSTN_STR-ENV_PROC_SYS sy-vline 
WA_LFSSTN_STR-ENV_FINES sy-vline 
WA_LFSSTN_STR-ENV_FINES_CURR sy-vline 
WA_LFSSTN_STR-TTL_ENR_CONS sy-vline 
WA_LFSSTN_STR-TTL_ENR_CONS_UN sy-vline 
WA_LFSSTN_STR-RENEWABLE_ENERGY sy-vline 
WA_LFSSTN_STR-RENEW_ENERGY_UN sy-vline 
WA_LFSSTN_STR-TTL_WATER_CONS sy-vline 
WA_LFSSTN_STR-TTL_WATER_CON_UN sy-vline 
WA_LFSSTN_STR-RECYCLED_WATER sy-vline 
WA_LFSSTN_STR-RECYCL_WATER_UN sy-vline 
WA_LFSSTN_STR-GHG_SCOPE1 sy-vline 
WA_LFSSTN_STR-GHG_SCOPE1_UN sy-vline 
WA_LFSSTN_STR-GHG_SCOPE2 sy-vline 
WA_LFSSTN_STR-GHG_SCOPE2_UN sy-vline 
WA_LFSSTN_STR-GHG_SCOPE3 sy-vline 
WA_LFSSTN_STR-GHG_SCOPE3_UN sy-vline 
WA_LFSSTN_STR-WASTE_NON_HZD sy-vline 
WA_LFSSTN_STR-WASTE_NON_HZD_UN sy-vline 
WA_LFSSTN_STR-WASTE_HZD sy-vline 
WA_LFSSTN_STR-WASTE_HZD_UNIT sy-vline 
WA_LFSSTN_STR-WASTE_RECYCLED sy-vline 
WA_LFSSTN_STR-WASTE_RECYCLD_UN sy-vline 
WA_LFSSTN_STR-TOTAL_SPEND sy-vline 
WA_LFSSTN_STR-TOTAL_SPEND_CURR sy-vline 
WA_LFSSTN_STR-TOTAL_REVENUE sy-vline 
WA_LFSSTN_STR-TOT_REVENUE_CURR sy-vline 
WA_LFSSTN_STR-EMPLOYEE_COUNT sy-vline 
WA_LFSSTN_STR-TOTAL_RISK sy-vline 
WA_LFSSTN_STR-FINANCIAL_RISK sy-vline 
WA_LFSSTN_STR-LOGISTICAL_RISK sy-vline 
WA_LFSSTN_STR-QUALITY_RISK sy-vline 
WA_LFSSTN_STR-POLITICAL_RISK sy-vline 
WA_LFSSTN_STR-DUMMY_EEW_SSTN sy-vline      INTO ld_text SEPARATED BY SPACE.

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