ABAP Select data from SAP table MESMINFO into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MESMINFO
*  INTO TABLE @DATA(IT_MESMINFO2).
*--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_MESMINFO INDEX 1 INTO DATA(WA_MESMINFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MESMINFO>-RUNNUM = 1.
<MESMINFO>-RUNTIMECNTR = 1.
<MESMINFO>-USERID = 1.
<MESMINFO>-LANGU = 1.
<MESMINFO>-DIRECTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MESMINFO-DATESMSYNC, sy-vline,
  WA_MESMINFO-TIMESMSYNC, sy-vline,
  WA_MESMINFO-MBL_ID, sy-vline,
  WA_MESMINFO-SYNCBO, sy-vline,
  WA_MESMINFO-SEQNO, sy-vline,
  WA_MESMINFO-TOPCNTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MESMINFO 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_MESMINFO 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_MESMINFO INTO WA_MESMINFO.


*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 ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MESMINFO-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MESMINFO-LANGU.
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_MESMINFO_STR, 
RUNNUM TYPE STRING,
RUNTIMECNTR TYPE STRING,
USERID TYPE STRING,
LANGU TYPE STRING,
DIRECTION TYPE STRING,
DATESMSYNC TYPE STRING,
TIMESMSYNC TYPE STRING,
MBL_ID TYPE STRING,
SYNCBO TYPE STRING,
SEQNO TYPE STRING,
TOPCNTR TYPE STRING,
JOBTYPE TYPE STRING,
JOBNAME TYPE STRING,
DATESMJOB TYPE STRING,
TIMESMJOB TYPE STRING,
DATESMJOBFIN TYPE STRING,
TIMESMJOBFIN TYPE STRING,
RUNTIME TYPE STRING,
RETURNCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MESMINFO_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_MESMINFO_STR-RUNNUM sy-vline 
WA_MESMINFO_STR-RUNTIMECNTR sy-vline 
WA_MESMINFO_STR-USERID sy-vline 
WA_MESMINFO_STR-LANGU sy-vline 
WA_MESMINFO_STR-DIRECTION sy-vline 
WA_MESMINFO_STR-DATESMSYNC sy-vline 
WA_MESMINFO_STR-TIMESMSYNC sy-vline 
WA_MESMINFO_STR-MBL_ID sy-vline 
WA_MESMINFO_STR-SYNCBO sy-vline 
WA_MESMINFO_STR-SEQNO sy-vline 
WA_MESMINFO_STR-TOPCNTR sy-vline 
WA_MESMINFO_STR-JOBTYPE sy-vline 
WA_MESMINFO_STR-JOBNAME sy-vline 
WA_MESMINFO_STR-DATESMJOB sy-vline 
WA_MESMINFO_STR-TIMESMJOB sy-vline 
WA_MESMINFO_STR-DATESMJOBFIN sy-vline 
WA_MESMINFO_STR-TIMESMJOBFIN sy-vline 
WA_MESMINFO_STR-RUNTIME sy-vline 
WA_MESMINFO_STR-RETURNCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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