ABAP Select data from SAP table SAPWLINSTP 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 SAPWLINSTP 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 SAPWLINSTP. 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 SAPWLINSTP 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_SAPWLINSTP TYPE STANDARD TABLE OF SAPWLINSTP,
      WA_SAPWLINSTP TYPE SAPWLINSTP,
      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: <SAPWLINSTP> TYPE SAPWLINSTP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SAPWLINSTP
*  INTO TABLE @DATA(IT_SAPWLINSTP2).
*--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_SAPWLINSTP INDEX 1 INTO DATA(WA_SAPWLINSTP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SAPWLINSTP>-INSTANCE = 1.
<SAPWLINSTP>-HOST = 1.
<SAPWLINSTP>-ADREC = 1.
<SAPWLINSTP>-BTCREC = 1.
<SAPWLINSTP>-DBPROCREC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SAPWLINSTP-RFCREC, sy-vline,
  WA_SAPWLINSTP-SPOREC, sy-vline,
  WA_SAPWLINSTP-TABREC, sy-vline,
  WA_SAPWLINSTP-HTTPRECNO, sy-vline,
  WA_SAPWLINSTP-NOSTAT, sy-vline,
  WA_SAPWLINSTP-TCODE1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SAPWLINSTP 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_SAPWLINSTP 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_SAPWLINSTP INTO WA_SAPWLINSTP.


*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_SAPWLINSTP_STR, 
INSTANCE TYPE STRING,
HOST TYPE STRING,
ADREC TYPE STRING,
BTCREC TYPE STRING,
DBPROCREC TYPE STRING,
RFCREC TYPE STRING,
SPOREC TYPE STRING,
TABREC TYPE STRING,
HTTPRECNO TYPE STRING,
NOSTAT TYPE STRING,
TCODE1 TYPE STRING,
TCODE2 TYPE STRING,
TCODE3 TYPE STRING,
TCODE4 TYPE STRING,
TCODE5 TYPE STRING,
VMCREC TYPE STRING,
DBCONREC TYPE STRING,
SMTPREC TYPE STRING,
APCREC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SAPWLINSTP_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_SAPWLINSTP_STR-INSTANCE sy-vline 
WA_SAPWLINSTP_STR-HOST sy-vline 
WA_SAPWLINSTP_STR-ADREC sy-vline 
WA_SAPWLINSTP_STR-BTCREC sy-vline 
WA_SAPWLINSTP_STR-DBPROCREC sy-vline 
WA_SAPWLINSTP_STR-RFCREC sy-vline 
WA_SAPWLINSTP_STR-SPOREC sy-vline 
WA_SAPWLINSTP_STR-TABREC sy-vline 
WA_SAPWLINSTP_STR-HTTPRECNO sy-vline 
WA_SAPWLINSTP_STR-NOSTAT sy-vline 
WA_SAPWLINSTP_STR-TCODE1 sy-vline 
WA_SAPWLINSTP_STR-TCODE2 sy-vline 
WA_SAPWLINSTP_STR-TCODE3 sy-vline 
WA_SAPWLINSTP_STR-TCODE4 sy-vline 
WA_SAPWLINSTP_STR-TCODE5 sy-vline 
WA_SAPWLINSTP_STR-VMCREC sy-vline 
WA_SAPWLINSTP_STR-DBCONREC sy-vline 
WA_SAPWLINSTP_STR-SMTPREC sy-vline 
WA_SAPWLINSTP_STR-APCREC sy-vline      INTO ld_text SEPARATED BY SPACE.

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