ABAP Select data from SAP table TPDA_TOOL_GL_STACK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TPDA_TOOL_GL_STACK
*  INTO TABLE @DATA(IT_TPDA_TOOL_GL_STACK2).
*--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_TPDA_TOOL_GL_STACK INDEX 1 INTO DATA(WA_TPDA_TOOL_GL_STACK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TPDA_TOOL_GL_STACK>-IT_STACK_TC = 1.
<TPDA_TOOL_GL_STACK>-WA_STACK_LINE_TC = 1.
<TPDA_TOOL_GL_STACK>-STACKPOINTER = 1.
<TPDA_TOOL_GL_STACK>-STACKLEVEL = 1.
<TPDA_TOOL_GL_STACK>-STACKINDEX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TPDA_TOOL_GL_STACK-IMODELEVEL, sy-vline,
  WA_TPDA_TOOL_GL_STACK-ENHANCELEVEL, sy-vline,
  WA_TPDA_TOOL_GL_STACK-SYSTEMPROG, sy-vline,
  WA_TPDA_TOOL_GL_STACK-FLAGDYNPCONT, sy-vline,
  WA_TPDA_TOOL_GL_STACK-PROGRAM, sy-vline,
  WA_TPDA_TOOL_GL_STACK-INCLUDE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TPDA_TOOL_GL_STACK 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_TPDA_TOOL_GL_STACK 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_TPDA_TOOL_GL_STACK INTO WA_TPDA_TOOL_GL_STACK.


*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_TPDA_TOOL_GL_STACK_STR, 
IT_STACK_TC TYPE STRING,
WA_STACK_LINE_TC TYPE STRING,
STACKPOINTER TYPE STRING,
STACKLEVEL TYPE STRING,
STACKINDEX TYPE STRING,
IMODELEVEL TYPE STRING,
ENHANCELEVEL TYPE STRING,
SYSTEMPROG TYPE STRING,
FLAGDYNPCONT TYPE STRING,
PROGRAM TYPE STRING,
INCLUDE TYPE STRING,
LINE TYPE STRING,
EVENTTYPE TYPE STRING,
EVENTNAME TYPE STRING,
LOCCLASSNAME TYPE STRING,
FLAG_EOEV TYPE STRING,
FLAG_EOEV_NOLREF TYPE STRING,
ACTION1 TYPE STRING,
STACK_KIND TYPE STRING,
MERGE TYPE STRING,
SUBINDEX TYPE STRING,
NAVI_PROG TYPE STRING,
NAVI_DYNNR TYPE STRING,
TITLE TYPE STRING,
TC_STACK TYPE STRING,
FIXED_COLS TYPE STRING,
LINES TYPE STRING,
TOP_LINE TYPE STRING,
CURRENT_LINE TYPE STRING,
LEFT_COL TYPE STRING,
LINE_SEL_MODE TYPE STRING,
COL_SEL_MODE TYPE STRING,
LINE_SELECTOR TYPE STRING,
V_SCROLL TYPE STRING,
H_GRID TYPE STRING,
V_GRID TYPE STRING,
COLS TYPE STRING,
INVISIBLE TYPE STRING,
REF_STACK_CLASS TYPE STRING,
REF_CONTEXT_MENUE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TPDA_TOOL_GL_STACK_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_TPDA_TOOL_GL_STACK_STR-IT_STACK_TC sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-WA_STACK_LINE_TC sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-STACKPOINTER sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-STACKLEVEL sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-STACKINDEX sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-IMODELEVEL sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-ENHANCELEVEL sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-SYSTEMPROG sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-FLAGDYNPCONT sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-PROGRAM sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-INCLUDE sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-LINE sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-EVENTTYPE sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-EVENTNAME sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-LOCCLASSNAME sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-FLAG_EOEV sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-FLAG_EOEV_NOLREF sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-ACTION1 sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-STACK_KIND sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-MERGE sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-SUBINDEX sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-NAVI_PROG sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-NAVI_DYNNR sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-TITLE sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-TC_STACK sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-FIXED_COLS sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-LINES sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-TOP_LINE sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-CURRENT_LINE sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-LEFT_COL sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-LINE_SEL_MODE sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-COL_SEL_MODE sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-LINE_SELECTOR sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-V_SCROLL sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-H_GRID sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-V_GRID sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-COLS sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-INVISIBLE sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-REF_STACK_CLASS sy-vline 
WA_TPDA_TOOL_GL_STACK_STR-REF_CONTEXT_MENUE sy-vline      INTO ld_text SEPARATED BY SPACE.

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