ABAP Select data from SAP table CSH2M_AENV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CSH2M_AENV 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 CSH2M_AENV. 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 CSH2M_AENV 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_CSH2M_AENV TYPE STANDARD TABLE OF CSH2M_AENV,
      WA_CSH2M_AENV TYPE CSH2M_AENV,
      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: <CSH2M_AENV> TYPE CSH2M_AENV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CSH2M_AENV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CSH2M_AENV
  INTO TABLE IT_CSH2M_AENV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CSH2M_AENV
*  INTO TABLE @DATA(IT_CSH2M_AENV2).
*--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_CSH2M_AENV INDEX 1 INTO DATA(WA_CSH2M_AENV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CSH2M_AENV ASSIGNING <CSH2M_AENV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CSH2M_AENV>-AENNR = 1.
<CSH2M_AENV>-AETYP = 1.
<CSH2M_AENV>-AEERL = 1.
<CSH2M_AENV>-AENSP = 1.
<CSH2M_AENV>-TOBJA = 1.

ENDLOOP.

LOOP AT IT_CSH2M_AENV INTO WA_CSH2M_AENV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CSH2M_AENV-INDFL, sy-vline,
  WA_CSH2M_AENV-OIGEN, sy-vline,
  WA_CSH2M_AENV-GENAN, sy-vline,
  WA_CSH2M_AENV-GENDI, sy-vline,
  WA_CSH2M_AENV-ANDAT, sy-vline,
  WA_CSH2M_AENV-ANNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CSH2M_AENV 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_CSH2M_AENV 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_CSH2M_AENV INTO WA_CSH2M_AENV.


*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 AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CSH2M_AENV-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSH2M_AENV-AENNR.
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_CSH2M_AENV_STR, 
AENNR TYPE STRING,
AETYP TYPE STRING,
AEERL TYPE STRING,
AENSP TYPE STRING,
TOBJA TYPE STRING,
INDFL TYPE STRING,
OIGEN TYPE STRING,
GENAN TYPE STRING,
GENDI TYPE STRING,
ANDAT TYPE STRING,
ANNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CSH2M_AENV_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_CSH2M_AENV_STR-AENNR sy-vline 
WA_CSH2M_AENV_STR-AETYP sy-vline 
WA_CSH2M_AENV_STR-AEERL sy-vline 
WA_CSH2M_AENV_STR-AENSP sy-vline 
WA_CSH2M_AENV_STR-TOBJA sy-vline 
WA_CSH2M_AENV_STR-INDFL sy-vline 
WA_CSH2M_AENV_STR-OIGEN sy-vline 
WA_CSH2M_AENV_STR-GENAN sy-vline 
WA_CSH2M_AENV_STR-GENDI sy-vline 
WA_CSH2M_AENV_STR-ANDAT sy-vline 
WA_CSH2M_AENV_STR-ANNAM sy-vline 
WA_CSH2M_AENV_STR-AEDAT sy-vline 
WA_CSH2M_AENV_STR-AENAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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