ABAP Select data from SAP table V_T018C into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_T018C 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 V_T018C. 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 V_T018C 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_V_T018C TYPE STANDARD TABLE OF V_T018C,
      WA_V_T018C TYPE V_T018C,
      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: <V_T018C> TYPE V_T018C.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_T018C.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_T018C
  INTO TABLE IT_V_T018C.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_T018C
*  INTO TABLE @DATA(IT_V_T018C2).
*--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_V_T018C INDEX 1 INTO DATA(WA_V_T018C2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_T018C ASSIGNING <V_T018C>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_T018C>-MANDT = 1.
<V_T018C>-BUKRS = 1.
<V_T018C>-KONTO = 1.
<V_T018C>-BUKRZ = 1.
<V_T018C>-ZAHLWKONTO = 1.

ENDLOOP.

LOOP AT IT_V_T018C INTO WA_V_T018C.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_T018C-MINIM, sy-vline,
  WA_V_T018C-KLIMIT, sy-vline,
  WA_V_T018C-TOLUNT, sy-vline,
  WA_V_T018C-TOLUEB, sy-vline,
  WA_V_T018C-DIMIN, sy-vline,
  WA_V_T018C-MINAB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_T018C 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_V_T018C 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_V_T018C INTO WA_V_T018C.


*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 ALPHA, internal->external for field KONTO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_T018C-KONTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T018C-KONTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ZAHLWKONTO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_T018C-ZAHLWKONTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T018C-ZAHLWKONTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field MINIM
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_V_T018C-MINIM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T018C-MINIM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field KLIMIT
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_V_T018C-KLIMIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T018C-KLIMIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field TOLUNT
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_V_T018C-TOLUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T018C-TOLUNT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field TOLUEB
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_V_T018C-TOLUEB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T018C-TOLUEB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field DIMIN
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_V_T018C-DIMIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T018C-DIMIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field MINAB
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_V_T018C-MINAB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T018C-MINAB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ZKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_T018C-ZKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T018C-ZKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ZKONT_H
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_T018C-ZKONT_H
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T018C-ZKONT_H.
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_V_T018C_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
KONTO TYPE STRING,
BUKRZ TYPE STRING,
ZAHLWKONTO TYPE STRING,
MINIM TYPE STRING,
KLIMIT TYPE STRING,
TOLUNT TYPE STRING,
TOLUEB TYPE STRING,
DIMIN TYPE STRING,
MINAB TYPE STRING,
ZKONT TYPE STRING,
ZKONT_H TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_T018C_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_V_T018C_STR-MANDT sy-vline 
WA_V_T018C_STR-BUKRS sy-vline 
WA_V_T018C_STR-KONTO sy-vline 
WA_V_T018C_STR-BUKRZ sy-vline 
WA_V_T018C_STR-ZAHLWKONTO sy-vline 
WA_V_T018C_STR-MINIM sy-vline 
WA_V_T018C_STR-KLIMIT sy-vline 
WA_V_T018C_STR-TOLUNT sy-vline 
WA_V_T018C_STR-TOLUEB sy-vline 
WA_V_T018C_STR-DIMIN sy-vline 
WA_V_T018C_STR-MINAB sy-vline 
WA_V_T018C_STR-ZKONT sy-vline 
WA_V_T018C_STR-ZKONT_H sy-vline      INTO ld_text SEPARATED BY SPACE.

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