ABAP Select data from SAP table SQLMXE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SQLMXE
*  INTO TABLE @DATA(IT_SQLMXE2).
*--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_SQLMXE INDEX 1 INTO DATA(WA_SQLMXE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SQLMXE>-TABLENAMES = 1.
<SQLMXE>-IDX = 1.
<SQLMXE>-TABLEVIEWNAME = 1.
<SQLMXE>-CDSVIEWNAME = 1.
<SQLMXE>-SQLVIEWNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SQLMXE-PROXYSQLVIEWNAME, sy-vline,
  WA_SQLMXE-PROXYCDSVIEWNAME, sy-vline,
  WA_SQLMXE-TABLEFUNCTIONNAME, sy-vline,
  WA_SQLMXE-AMDPNAME, sy-vline,
  WA_SQLMXE-ANNOSERVICEQUALITY, sy-vline,
  WA_SQLMXE-ANNOSIZECATEGORY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SQLMXE 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_SQLMXE 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_SQLMXE INTO WA_SQLMXE.


*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_SQLMXE_STR, 
TABLENAMES TYPE STRING,
IDX TYPE STRING,
TABLEVIEWNAME TYPE STRING,
CDSVIEWNAME TYPE STRING,
SQLVIEWNAME TYPE STRING,
PROXYSQLVIEWNAME TYPE STRING,
PROXYCDSVIEWNAME TYPE STRING,
TABLEFUNCTIONNAME TYPE STRING,
AMDPNAME TYPE STRING,
ANNOSERVICEQUALITY TYPE STRING,
ANNOSIZECATEGORY TYPE STRING,
ANNODATACLASS TYPE STRING,
AS4DATE TYPE STRING,
AS4TIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SQLMXE_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_SQLMXE_STR-TABLENAMES sy-vline 
WA_SQLMXE_STR-IDX sy-vline 
WA_SQLMXE_STR-TABLEVIEWNAME sy-vline 
WA_SQLMXE_STR-CDSVIEWNAME sy-vline 
WA_SQLMXE_STR-SQLVIEWNAME sy-vline 
WA_SQLMXE_STR-PROXYSQLVIEWNAME sy-vline 
WA_SQLMXE_STR-PROXYCDSVIEWNAME sy-vline 
WA_SQLMXE_STR-TABLEFUNCTIONNAME sy-vline 
WA_SQLMXE_STR-AMDPNAME sy-vline 
WA_SQLMXE_STR-ANNOSERVICEQUALITY sy-vline 
WA_SQLMXE_STR-ANNOSIZECATEGORY sy-vline 
WA_SQLMXE_STR-ANNODATACLASS sy-vline 
WA_SQLMXE_STR-AS4DATE sy-vline 
WA_SQLMXE_STR-AS4TIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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