ABAP Select data from SAP table TLANEXP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TLANEXP
*  INTO TABLE @DATA(IT_TLANEXP2).
*--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_TLANEXP INDEX 1 INTO DATA(WA_TLANEXP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TLANEXP>-ACTID = 1.
<TLANEXP>-LFD_SPRAS = 1.
<TLANEXP>-SPRAS = 1.
<TLANEXP>-REL = 1.
<TLANEXP>-UNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TLANEXP-TEXT, sy-vline,
  WA_TLANEXP-ADATE, sy-vline,
  WA_TLANEXP-ATIME, sy-vline,
  WA_TLANEXP-JOBNAME, sy-vline,
  WA_TLANEXP-JOBCOUNT, sy-vline,
  WA_TLANEXP-STATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TLANEXP 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_TLANEXP 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_TLANEXP INTO WA_TLANEXP.


*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 ISOLA, internal->external for field LFD_SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TLANEXP-LFD_SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TLANEXP-LFD_SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TLANEXP-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TLANEXP-SPRAS.
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_TLANEXP_STR, 
ACTID TYPE STRING,
LFD_SPRAS TYPE STRING,
SPRAS TYPE STRING,
REL TYPE STRING,
UNAME TYPE STRING,
TEXT TYPE STRING,
ADATE TYPE STRING,
ATIME TYPE STRING,
JOBNAME TYPE STRING,
JOBCOUNT TYPE STRING,
STATUS TYPE STRING,
MAXRC TYPE STRING,
LOG_HANDLE TYPE STRING,
STEP TYPE STRING,
GENERIC TYPE STRING,
DELIVERY TYPE STRING,
MASTERLANG TYPE STRING,
FLAG_UPG TYPE STRING,
FLAG_SMLT TYPE STRING,
FLAG_FULL TYPE STRING,
PACK_MODE TYPE STRING,
UCON TYPE STRING,
TRKORR TYPE STRING,
R3TRANSOP TYPE STRING,
PAREXP TYPE STRING,
PACK TYPE STRING,
TRNUM TYPE STRING,
TR_SCHEME TYPE STRING,
PAT_SCHEME TYPE STRING,
NOTES TYPE STRING,
TP_LSM TYPE STRING,
CHECK_EXIST TYPE STRING,
PRECOND_PATCH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TLANEXP_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_TLANEXP_STR-ACTID sy-vline 
WA_TLANEXP_STR-LFD_SPRAS sy-vline 
WA_TLANEXP_STR-SPRAS sy-vline 
WA_TLANEXP_STR-REL sy-vline 
WA_TLANEXP_STR-UNAME sy-vline 
WA_TLANEXP_STR-TEXT sy-vline 
WA_TLANEXP_STR-ADATE sy-vline 
WA_TLANEXP_STR-ATIME sy-vline 
WA_TLANEXP_STR-JOBNAME sy-vline 
WA_TLANEXP_STR-JOBCOUNT sy-vline 
WA_TLANEXP_STR-STATUS sy-vline 
WA_TLANEXP_STR-MAXRC sy-vline 
WA_TLANEXP_STR-LOG_HANDLE sy-vline 
WA_TLANEXP_STR-STEP sy-vline 
WA_TLANEXP_STR-GENERIC sy-vline 
WA_TLANEXP_STR-DELIVERY sy-vline 
WA_TLANEXP_STR-MASTERLANG sy-vline 
WA_TLANEXP_STR-FLAG_UPG sy-vline 
WA_TLANEXP_STR-FLAG_SMLT sy-vline 
WA_TLANEXP_STR-FLAG_FULL sy-vline 
WA_TLANEXP_STR-PACK_MODE sy-vline 
WA_TLANEXP_STR-UCON sy-vline 
WA_TLANEXP_STR-TRKORR sy-vline 
WA_TLANEXP_STR-R3TRANSOP sy-vline 
WA_TLANEXP_STR-PAREXP sy-vline 
WA_TLANEXP_STR-PACK sy-vline 
WA_TLANEXP_STR-TRNUM sy-vline 
WA_TLANEXP_STR-TR_SCHEME sy-vline 
WA_TLANEXP_STR-PAT_SCHEME sy-vline 
WA_TLANEXP_STR-NOTES sy-vline 
WA_TLANEXP_STR-TP_LSM sy-vline 
WA_TLANEXP_STR-CHECK_EXIST sy-vline 
WA_TLANEXP_STR-PRECOND_PATCH sy-vline      INTO ld_text SEPARATED BY SPACE.

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