ABAP Select data from SAP table TEWAMIGREQUZ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TEWAMIGREQUZ
*  INTO TABLE @DATA(IT_TEWAMIGREQUZ2).
*--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_TEWAMIGREQUZ INDEX 1 INTO DATA(WA_TEWAMIGREQUZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TEWAMIGREQUZ>-MANDT = 1.
<TEWAMIGREQUZ>-EQUNR = 1.
<TEWAMIGREQUZ>-DEVLOC = 1.
<TEWAMIGREQUZ>-EQLFN = 1.
<TEWAMIGREQUZ>-DATAB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TEWAMIGREQUZ-TIMAB, sy-vline,
  WA_TEWAMIGREQUZ-DATBI, sy-vline,
  WA_TEWAMIGREQUZ-TIMBI, sy-vline,
  WA_TEWAMIGREQUZ-STORNOFLAG, sy-vline,
  WA_TEWAMIGREQUZ-MIGRATEFLAG, sy-vline,
  WA_TEWAMIGREQUZ-STORNOFLAG_ERROR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TEWAMIGREQUZ 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_TEWAMIGREQUZ 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_TEWAMIGREQUZ INTO WA_TEWAMIGREQUZ.


*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 EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TEWAMIGREQUZ-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TEWAMIGREQUZ-EQUNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field DEVLOC
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_TEWAMIGREQUZ-DEVLOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TEWAMIGREQUZ-DEVLOC.
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_TEWAMIGREQUZ_STR, 
MANDT TYPE STRING,
EQUNR TYPE STRING,
DEVLOC TYPE STRING,
EQLFN TYPE STRING,
DATAB TYPE STRING,
TIMAB TYPE STRING,
DATBI TYPE STRING,
TIMBI TYPE STRING,
STORNOFLAG TYPE STRING,
MIGRATEFLAG TYPE STRING,
STORNOFLAG_ERROR TYPE STRING,
MIGRATEFLAG_ERROR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TEWAMIGREQUZ_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_TEWAMIGREQUZ_STR-MANDT sy-vline 
WA_TEWAMIGREQUZ_STR-EQUNR sy-vline 
WA_TEWAMIGREQUZ_STR-DEVLOC sy-vline 
WA_TEWAMIGREQUZ_STR-EQLFN sy-vline 
WA_TEWAMIGREQUZ_STR-DATAB sy-vline 
WA_TEWAMIGREQUZ_STR-TIMAB sy-vline 
WA_TEWAMIGREQUZ_STR-DATBI sy-vline 
WA_TEWAMIGREQUZ_STR-TIMBI sy-vline 
WA_TEWAMIGREQUZ_STR-STORNOFLAG sy-vline 
WA_TEWAMIGREQUZ_STR-MIGRATEFLAG sy-vline 
WA_TEWAMIGREQUZ_STR-STORNOFLAG_ERROR sy-vline 
WA_TEWAMIGREQUZ_STR-MIGRATEFLAG_ERROR sy-vline      INTO ld_text SEPARATED BY SPACE.

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