ABAP Select data from SAP table SGLWLSH1ST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SGLWLSH1ST 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 SGLWLSH1ST. 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 SGLWLSH1ST 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_SGLWLSH1ST TYPE STANDARD TABLE OF SGLWLSH1ST,
      WA_SGLWLSH1ST TYPE SGLWLSH1ST,
      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: <SGLWLSH1ST> TYPE SGLWLSH1ST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SGLWLSH1ST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SGLWLSH1ST
  INTO TABLE IT_SGLWLSH1ST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SGLWLSH1ST
*  INTO TABLE @DATA(IT_SGLWLSH1ST2).
*--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_SGLWLSH1ST INDEX 1 INTO DATA(WA_SGLWLSH1ST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SGLWLSH1ST ASSIGNING <SGLWLSH1ST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SGLWLSH1ST>-RECNO = 1.
<SGLWLSH1ST>-DISPCNT = 1.
<SGLWLSH1ST>-DATE = 1.
<SGLWLSH1ST>-STARTDATE = 1.
<SGLWLSH1ST>-STARTTIME = 1.

ENDLOOP.

LOOP AT IT_SGLWLSH1ST INTO WA_SGLWLSH1ST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SGLWLSH1ST-ENDDATE, sy-vline,
  WA_SGLWLSH1ST-ENDTIME, sy-vline,
  WA_SGLWLSH1ST-RESPTI, sy-vline,
  WA_SGLWLSH1ST-CPUTI, sy-vline,
  WA_SGLWLSH1ST-QUEUETI, sy-vline,
  WA_SGLWLSH1ST-WPID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SGLWLSH1ST 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_SGLWLSH1ST 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_SGLWLSH1ST INTO WA_SGLWLSH1ST.


*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_SGLWLSH1ST_STR, 
RECNO TYPE STRING,
DISPCNT TYPE STRING,
DATE TYPE STRING,
STARTDATE TYPE STRING,
STARTTIME TYPE STRING,
ENDDATE TYPE STRING,
ENDTIME TYPE STRING,
RESPTI TYPE STRING,
CPUTI TYPE STRING,
QUEUETI TYPE STRING,
WPID TYPE STRING,
TASKTYPE TYPE STRING,
TABLOAD TYPE STRING,
DYNPRONR TYPE STRING,
REPORT TYPE STRING,
ACCOUNT TYPE STRING,
MANDT TYPE STRING,
ROLLKEY TYPE STRING,
INPUTLEN TYPE STRING,
OUTPUTLEN TYPE STRING,
MAXROLL TYPE STRING,
MAXPAGE TYPE STRING,
ROLLINCNT TYPE STRING,
ROLLINTI TYPE STRING,
ROLLOUTCNT TYPE STRING,
ROLLOUTTI TYPE STRING,
LOCKCNT TYPE STRING,
LOCKTI TYPE STRING,
READDIRCNT TYPE STRING,
READDIRTI TYPE STRING,
READDIRREC TYPE STRING,
READDIRBUF TYPE STRING,
READSEQCNT TYPE STRING,
READSEQTI TYPE STRING,
READSEQREC TYPE STRING,
READSEQBUF TYPE STRING,
PHYREADCNT TYPE STRING,
INSCNT TYPE STRING,
INSTI TYPE STRING,
INSREC TYPE STRING,
PHYINSCNT TYPE STRING,
UPDCNT TYPE STRING,
UPDTI TYPE STRING,
UPDREC TYPE STRING,
PHYUPDCNT TYPE STRING,
DELCNT TYPE STRING,
DELTI TYPE STRING,
DELREC TYPE STRING,
PHYDELCNT TYPE STRING,
COMMITTI TYPE STRING,
GENERATETI TYPE STRING,
REPLOADTI TYPE STRING,
CUALOADTI TYPE STRING,
DYNPLOADTI TYPE STRING,
DSQLCNT TYPE STRING,
QUECNT TYPE STRING,
QUETI TYPE STRING,
DDICTI TYPE STRING,
RFCCNT TYPE STRING,
RFCTI TYPE STRING,
MEMSUM TYPE STRING,
PRIVSUM TYPE STRING,
USEDBYTES TYPE STRING,
MAXBYTES TYPE STRING,
MAXBYTESDI TYPE STRING,
PRIVMODE TYPE STRING,
WPRESTART TYPE STRING,
TRANSID TYPE STRING,
ROLLED_OUT TYPE STRING,
DBPROCCNT TYPE STRING,
DBPROCTI TYPE STRING,
LUW_INFO TYPE STRING,
SLI_CNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SGLWLSH1ST_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_SGLWLSH1ST_STR-RECNO sy-vline 
WA_SGLWLSH1ST_STR-DISPCNT sy-vline 
WA_SGLWLSH1ST_STR-DATE sy-vline 
WA_SGLWLSH1ST_STR-STARTDATE sy-vline 
WA_SGLWLSH1ST_STR-STARTTIME sy-vline 
WA_SGLWLSH1ST_STR-ENDDATE sy-vline 
WA_SGLWLSH1ST_STR-ENDTIME sy-vline 
WA_SGLWLSH1ST_STR-RESPTI sy-vline 
WA_SGLWLSH1ST_STR-CPUTI sy-vline 
WA_SGLWLSH1ST_STR-QUEUETI sy-vline 
WA_SGLWLSH1ST_STR-WPID sy-vline 
WA_SGLWLSH1ST_STR-TASKTYPE sy-vline 
WA_SGLWLSH1ST_STR-TABLOAD sy-vline 
WA_SGLWLSH1ST_STR-DYNPRONR sy-vline 
WA_SGLWLSH1ST_STR-REPORT sy-vline 
WA_SGLWLSH1ST_STR-ACCOUNT sy-vline 
WA_SGLWLSH1ST_STR-MANDT sy-vline 
WA_SGLWLSH1ST_STR-ROLLKEY sy-vline 
WA_SGLWLSH1ST_STR-INPUTLEN sy-vline 
WA_SGLWLSH1ST_STR-OUTPUTLEN sy-vline 
WA_SGLWLSH1ST_STR-MAXROLL sy-vline 
WA_SGLWLSH1ST_STR-MAXPAGE sy-vline 
WA_SGLWLSH1ST_STR-ROLLINCNT sy-vline 
WA_SGLWLSH1ST_STR-ROLLINTI sy-vline 
WA_SGLWLSH1ST_STR-ROLLOUTCNT sy-vline 
WA_SGLWLSH1ST_STR-ROLLOUTTI sy-vline 
WA_SGLWLSH1ST_STR-LOCKCNT sy-vline 
WA_SGLWLSH1ST_STR-LOCKTI sy-vline 
WA_SGLWLSH1ST_STR-READDIRCNT sy-vline 
WA_SGLWLSH1ST_STR-READDIRTI sy-vline 
WA_SGLWLSH1ST_STR-READDIRREC sy-vline 
WA_SGLWLSH1ST_STR-READDIRBUF sy-vline 
WA_SGLWLSH1ST_STR-READSEQCNT sy-vline 
WA_SGLWLSH1ST_STR-READSEQTI sy-vline 
WA_SGLWLSH1ST_STR-READSEQREC sy-vline 
WA_SGLWLSH1ST_STR-READSEQBUF sy-vline 
WA_SGLWLSH1ST_STR-PHYREADCNT sy-vline 
WA_SGLWLSH1ST_STR-INSCNT sy-vline 
WA_SGLWLSH1ST_STR-INSTI sy-vline 
WA_SGLWLSH1ST_STR-INSREC sy-vline 
WA_SGLWLSH1ST_STR-PHYINSCNT sy-vline 
WA_SGLWLSH1ST_STR-UPDCNT sy-vline 
WA_SGLWLSH1ST_STR-UPDTI sy-vline 
WA_SGLWLSH1ST_STR-UPDREC sy-vline 
WA_SGLWLSH1ST_STR-PHYUPDCNT sy-vline 
WA_SGLWLSH1ST_STR-DELCNT sy-vline 
WA_SGLWLSH1ST_STR-DELTI sy-vline 
WA_SGLWLSH1ST_STR-DELREC sy-vline 
WA_SGLWLSH1ST_STR-PHYDELCNT sy-vline 
WA_SGLWLSH1ST_STR-COMMITTI sy-vline 
WA_SGLWLSH1ST_STR-GENERATETI sy-vline 
WA_SGLWLSH1ST_STR-REPLOADTI sy-vline 
WA_SGLWLSH1ST_STR-CUALOADTI sy-vline 
WA_SGLWLSH1ST_STR-DYNPLOADTI sy-vline 
WA_SGLWLSH1ST_STR-DSQLCNT sy-vline 
WA_SGLWLSH1ST_STR-QUECNT sy-vline 
WA_SGLWLSH1ST_STR-QUETI sy-vline 
WA_SGLWLSH1ST_STR-DDICTI sy-vline 
WA_SGLWLSH1ST_STR-RFCCNT sy-vline 
WA_SGLWLSH1ST_STR-RFCTI sy-vline 
WA_SGLWLSH1ST_STR-MEMSUM sy-vline 
WA_SGLWLSH1ST_STR-PRIVSUM sy-vline 
WA_SGLWLSH1ST_STR-USEDBYTES sy-vline 
WA_SGLWLSH1ST_STR-MAXBYTES sy-vline 
WA_SGLWLSH1ST_STR-MAXBYTESDI sy-vline 
WA_SGLWLSH1ST_STR-PRIVMODE sy-vline 
WA_SGLWLSH1ST_STR-WPRESTART sy-vline 
WA_SGLWLSH1ST_STR-TRANSID sy-vline 
WA_SGLWLSH1ST_STR-ROLLED_OUT sy-vline 
WA_SGLWLSH1ST_STR-DBPROCCNT sy-vline 
WA_SGLWLSH1ST_STR-DBPROCTI sy-vline 
WA_SGLWLSH1ST_STR-LUW_INFO sy-vline 
WA_SGLWLSH1ST_STR-SLI_CNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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