ABAP Select data from SAP table SMLS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SMLS
*  INTO TABLE @DATA(IT_SMLS2).
*--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_SMLS INDEX 1 INTO DATA(WA_SMLS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SMLS>-MLST_MANDT = 1.
<SMLS>-AUTYP = 1.
<SMLS>-MLST_SMLNR = 1.
<SMLS>-MLSET = 1.
<SMLS>-MLSTN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SMLS-USERH, sy-vline,
  WA_SMLS-DATEH, sy-vline,
  WA_SMLS-USERV, sy-vline,
  WA_SMLS-DATEV, sy-vline,
  WA_SMLS-LST_FERTG, sy-vline,
  WA_SMLS-LATED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SMLS 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_SMLS 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_SMLS INTO WA_SMLS.


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

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

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

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

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

*Conversion exit NUMCV, internal->external for field VORNR_ICPN
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_SMLS-VORNR_ICPN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SMLS-VORNR_ICPN.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit NUMCV, internal->external for field OPRST_ICSN
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_SMLS-OPRST_ICSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SMLS-OPRST_ICSN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field OPREN_ICSN
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_SMLS-OPREN_ICSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SMLS-OPREN_ICSN.
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_SMLS_STR, 
MLST_MANDT TYPE STRING,
AUTYP TYPE STRING,
MLST_SMLNR TYPE STRING,
MLSET TYPE STRING,
MLSTN TYPE STRING,
USERH TYPE STRING,
DATEH TYPE STRING,
USERV TYPE STRING,
DATEV TYPE STRING,
LST_FERTG TYPE STRING,
LATED TYPE STRING,
DLTAS TYPE STRING,
DELTA TYPE STRING,
DELTE TYPE STRING,
PRCNT TYPE STRING,
SDDAT TYPE STRING,
KZ_LSTWR TYPE STRING,
KZ_WFLOW TYPE STRING,
KZ_FAKTP TYPE STRING,
KZ_FRMST TYPE STRING,
RELSU TYPE STRING,
RELMS TYPE STRING,
INCPN TYPE STRING,
INCNW TYPE STRING,
INCSN TYPE STRING,
WKFLW TYPE STRING,
RELSU_SS TYPE STRING,
RELMS_SS TYPE STRING,
INCPN_SS TYPE STRING,
INCNW_SS TYPE STRING,
INCSN_SS TYPE STRING,
WKFLW_SS TYPE STRING,
RELSU_SM TYPE STRING,
RELMS_SM TYPE STRING,
INCPN_SM TYPE STRING,
INCNW_SM TYPE STRING,
INCSN_SM TYPE STRING,
WKFLW_SM TYPE STRING,
RELSU_CH TYPE STRING,
RELMS_CH TYPE STRING,
INCPN_CH TYPE STRING,
INCNW_CH TYPE STRING,
INCSN_CH TYPE STRING,
WKFLW_CH TYPE STRING,
RELSU_SG TYPE STRING,
RELMS_SG TYPE STRING,
INCPN_SG TYPE STRING,
INCNW_SG TYPE STRING,
INCSN_SG TYPE STRING,
WKFLW_SG TYPE STRING,
RELSU_TR TYPE STRING,
RELMS_TR TYPE STRING,
INCPN_TR TYPE STRING,
INCNW_TR TYPE STRING,
INCSN_TR TYPE STRING,
WKFLW_TR TYPE STRING,
RELSU_US TYPE STRING,
RELMS_US TYPE STRING,
INCPN_US TYPE STRING,
INCNW_US TYPE STRING,
INCSN_US TYPE STRING,
WKFLW_US TYPE STRING,
AUART_ICNW TYPE STRING,
STDNR_ICNW TYPE STRING,
ALTNR_ICNW TYPE STRING,
STDNR_ICPN TYPE STRING,
ALTNR_ICPN TYPE STRING,
VORNR_ICPN TYPE STRING,
STDNR_ICSN TYPE STRING,
ALTNR_ICSN TYPE STRING,
OPRST_ICSN TYPE STRING,
OPREN_ICSN TYPE STRING,
TASK_ID TYPE STRING,
BEGRU TYPE STRING,
STSMA TYPE STRING,
FPROZ TYPE STRING,
KZ_TREND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SMLS_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_SMLS_STR-MLST_MANDT sy-vline 
WA_SMLS_STR-AUTYP sy-vline 
WA_SMLS_STR-MLST_SMLNR sy-vline 
WA_SMLS_STR-MLSET sy-vline 
WA_SMLS_STR-MLSTN sy-vline 
WA_SMLS_STR-USERH sy-vline 
WA_SMLS_STR-DATEH sy-vline 
WA_SMLS_STR-USERV sy-vline 
WA_SMLS_STR-DATEV sy-vline 
WA_SMLS_STR-LST_FERTG sy-vline 
WA_SMLS_STR-LATED sy-vline 
WA_SMLS_STR-DLTAS sy-vline 
WA_SMLS_STR-DELTA sy-vline 
WA_SMLS_STR-DELTE sy-vline 
WA_SMLS_STR-PRCNT sy-vline 
WA_SMLS_STR-SDDAT sy-vline 
WA_SMLS_STR-KZ_LSTWR sy-vline 
WA_SMLS_STR-KZ_WFLOW sy-vline 
WA_SMLS_STR-KZ_FAKTP sy-vline 
WA_SMLS_STR-KZ_FRMST sy-vline 
WA_SMLS_STR-RELSU sy-vline 
WA_SMLS_STR-RELMS sy-vline 
WA_SMLS_STR-INCPN sy-vline 
WA_SMLS_STR-INCNW sy-vline 
WA_SMLS_STR-INCSN sy-vline 
WA_SMLS_STR-WKFLW sy-vline 
WA_SMLS_STR-RELSU_SS sy-vline 
WA_SMLS_STR-RELMS_SS sy-vline 
WA_SMLS_STR-INCPN_SS sy-vline 
WA_SMLS_STR-INCNW_SS sy-vline 
WA_SMLS_STR-INCSN_SS sy-vline 
WA_SMLS_STR-WKFLW_SS sy-vline 
WA_SMLS_STR-RELSU_SM sy-vline 
WA_SMLS_STR-RELMS_SM sy-vline 
WA_SMLS_STR-INCPN_SM sy-vline 
WA_SMLS_STR-INCNW_SM sy-vline 
WA_SMLS_STR-INCSN_SM sy-vline 
WA_SMLS_STR-WKFLW_SM sy-vline 
WA_SMLS_STR-RELSU_CH sy-vline 
WA_SMLS_STR-RELMS_CH sy-vline 
WA_SMLS_STR-INCPN_CH sy-vline 
WA_SMLS_STR-INCNW_CH sy-vline 
WA_SMLS_STR-INCSN_CH sy-vline 
WA_SMLS_STR-WKFLW_CH sy-vline 
WA_SMLS_STR-RELSU_SG sy-vline 
WA_SMLS_STR-RELMS_SG sy-vline 
WA_SMLS_STR-INCPN_SG sy-vline 
WA_SMLS_STR-INCNW_SG sy-vline 
WA_SMLS_STR-INCSN_SG sy-vline 
WA_SMLS_STR-WKFLW_SG sy-vline 
WA_SMLS_STR-RELSU_TR sy-vline 
WA_SMLS_STR-RELMS_TR sy-vline 
WA_SMLS_STR-INCPN_TR sy-vline 
WA_SMLS_STR-INCNW_TR sy-vline 
WA_SMLS_STR-INCSN_TR sy-vline 
WA_SMLS_STR-WKFLW_TR sy-vline 
WA_SMLS_STR-RELSU_US sy-vline 
WA_SMLS_STR-RELMS_US sy-vline 
WA_SMLS_STR-INCPN_US sy-vline 
WA_SMLS_STR-INCNW_US sy-vline 
WA_SMLS_STR-INCSN_US sy-vline 
WA_SMLS_STR-WKFLW_US sy-vline 
WA_SMLS_STR-AUART_ICNW sy-vline 
WA_SMLS_STR-STDNR_ICNW sy-vline 
WA_SMLS_STR-ALTNR_ICNW sy-vline 
WA_SMLS_STR-STDNR_ICPN sy-vline 
WA_SMLS_STR-ALTNR_ICPN sy-vline 
WA_SMLS_STR-VORNR_ICPN sy-vline 
WA_SMLS_STR-STDNR_ICSN sy-vline 
WA_SMLS_STR-ALTNR_ICSN sy-vline 
WA_SMLS_STR-OPRST_ICSN sy-vline 
WA_SMLS_STR-OPREN_ICSN sy-vline 
WA_SMLS_STR-TASK_ID sy-vline 
WA_SMLS_STR-BEGRU sy-vline 
WA_SMLS_STR-STSMA sy-vline 
WA_SMLS_STR-FPROZ sy-vline 
WA_SMLS_STR-KZ_TREND sy-vline      INTO ld_text SEPARATED BY SPACE.

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