ABAP Select data from SAP table TPM_LINES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TPM_LINES
*  INTO TABLE @DATA(IT_TPM_LINES2).
*--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_TPM_LINES INDEX 1 INTO DATA(WA_TPM_LINES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TPM_LINES>-L01 = 1.
<TPM_LINES>-L02 = 1.
<TPM_LINES>-L03 = 1.
<TPM_LINES>-L04 = 1.
<TPM_LINES>-L05 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TPM_LINES-L06, sy-vline,
  WA_TPM_LINES-L07, sy-vline,
  WA_TPM_LINES-L08, sy-vline,
  WA_TPM_LINES-L09, sy-vline,
  WA_TPM_LINES-L10, sy-vline,
  WA_TPM_LINES-LX01, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TPM_LINES 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_TPM_LINES 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_TPM_LINES INTO WA_TPM_LINES.


*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_TPM_LINES_STR, 
L01 TYPE STRING,
L02 TYPE STRING,
L03 TYPE STRING,
L04 TYPE STRING,
L05 TYPE STRING,
L06 TYPE STRING,
L07 TYPE STRING,
L08 TYPE STRING,
L09 TYPE STRING,
L10 TYPE STRING,
LX01 TYPE STRING,
LX02 TYPE STRING,
LX03 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TPM_LINES_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_TPM_LINES_STR-L01 sy-vline 
WA_TPM_LINES_STR-L02 sy-vline 
WA_TPM_LINES_STR-L03 sy-vline 
WA_TPM_LINES_STR-L04 sy-vline 
WA_TPM_LINES_STR-L05 sy-vline 
WA_TPM_LINES_STR-L06 sy-vline 
WA_TPM_LINES_STR-L07 sy-vline 
WA_TPM_LINES_STR-L08 sy-vline 
WA_TPM_LINES_STR-L09 sy-vline 
WA_TPM_LINES_STR-L10 sy-vline 
WA_TPM_LINES_STR-LX01 sy-vline 
WA_TPM_LINES_STR-LX02 sy-vline 
WA_TPM_LINES_STR-LX03 sy-vline      INTO ld_text SEPARATED BY SPACE.

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