ABAP Select data from SAP table VZCHESR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VZCHESR
*  INTO TABLE @DATA(IT_VZCHESR2).
*--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_VZCHESR INDEX 1 INTO DATA(WA_VZCHESR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VZCHESR>-VZBETR = 1.
<VZCHESR>-VZREFN = 1.
<VZCHESR>-VZWANB = 1.
<VZCHESR>-VZWAKZ = 1.
<VZCHESR>-VZERP1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VZCHESR-VZZAHL, sy-vline,
  WA_VZCHESR-VZFAKT, sy-vline,
  WA_VZCHESR-VZPROD, sy-vline,
  WA_VZCHESR-VZZWSU, sy-vline,
  WA_VZCHESR-VZRESU, sy-vline,
  WA_VZCHESR-VZTE01, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VZCHESR 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_VZCHESR 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_VZCHESR INTO WA_VZCHESR.


*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_VZCHESR_STR, 
VZBETR TYPE STRING,
VZREFN TYPE STRING,
VZWANB TYPE STRING,
VZWAKZ TYPE STRING,
VZERP1 TYPE STRING,
VZZAHL TYPE STRING,
VZFAKT TYPE STRING,
VZPROD TYPE STRING,
VZZWSU TYPE STRING,
VZRESU TYPE STRING,
VZTE01 TYPE STRING,
VZTE02 TYPE STRING,
VZERP2 TYPE STRING,
VZWORK TYPE STRING,
VZBEP1 TYPE STRING,
VZBEP2 TYPE STRING,
VZBEP3 TYPE STRING,
VZBEP4 TYPE STRING,
VZBEP5 TYPE STRING,
VZBEP6 TYPE STRING,
VZBEP7 TYPE STRING,
VZBEP8 TYPE STRING,
VZZWBE TYPE STRING,
VZTEIL TYPE STRING,
VZKODZ TYPE STRING,
VZPOPR TYPE STRING,
VZMWSTNR TYPE STRING,
VZEIGENTUMER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VZCHESR_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_VZCHESR_STR-VZBETR sy-vline 
WA_VZCHESR_STR-VZREFN sy-vline 
WA_VZCHESR_STR-VZWANB sy-vline 
WA_VZCHESR_STR-VZWAKZ sy-vline 
WA_VZCHESR_STR-VZERP1 sy-vline 
WA_VZCHESR_STR-VZZAHL sy-vline 
WA_VZCHESR_STR-VZFAKT sy-vline 
WA_VZCHESR_STR-VZPROD sy-vline 
WA_VZCHESR_STR-VZZWSU sy-vline 
WA_VZCHESR_STR-VZRESU sy-vline 
WA_VZCHESR_STR-VZTE01 sy-vline 
WA_VZCHESR_STR-VZTE02 sy-vline 
WA_VZCHESR_STR-VZERP2 sy-vline 
WA_VZCHESR_STR-VZWORK sy-vline 
WA_VZCHESR_STR-VZBEP1 sy-vline 
WA_VZCHESR_STR-VZBEP2 sy-vline 
WA_VZCHESR_STR-VZBEP3 sy-vline 
WA_VZCHESR_STR-VZBEP4 sy-vline 
WA_VZCHESR_STR-VZBEP5 sy-vline 
WA_VZCHESR_STR-VZBEP6 sy-vline 
WA_VZCHESR_STR-VZBEP7 sy-vline 
WA_VZCHESR_STR-VZBEP8 sy-vline 
WA_VZCHESR_STR-VZZWBE sy-vline 
WA_VZCHESR_STR-VZTEIL sy-vline 
WA_VZCHESR_STR-VZKODZ sy-vline 
WA_VZCHESR_STR-VZPOPR sy-vline 
WA_VZCHESR_STR-VZMWSTNR sy-vline 
WA_VZCHESR_STR-VZEIGENTUMER sy-vline      INTO ld_text SEPARATED BY SPACE.

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