ABAP Select data from SAP table MSSMEMQGRANTS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MSSMEMQGRANTS
*  INTO TABLE @DATA(IT_MSSMEMQGRANTS2).
*--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_MSSMEMQGRANTS INDEX 1 INTO DATA(WA_MSSMEMQGRANTS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MSSMEMQGRANTS>-SESSID = 1.
<MSSMEMQGRANTS>-REQID = 1.
<MSSMEMQGRANTS>-SCHEDID = 1.
<MSSMEMQGRANTS>-DOP = 1.
<MSSMEMQGRANTS>-REQTIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MSSMEMQGRANTS-GRANTTIME, sy-vline,
  WA_MSSMEMQGRANTS-REQMEMKB, sy-vline,
  WA_MSSMEMQGRANTS-GRANTMEMKB, sy-vline,
  WA_MSSMEMQGRANTS-REQRMEMKB, sy-vline,
  WA_MSSMEMQGRANTS-USEDMEMKB, sy-vline,
  WA_MSSMEMQGRANTS-MAXUSEDMEMKB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MSSMEMQGRANTS 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_MSSMEMQGRANTS 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_MSSMEMQGRANTS INTO WA_MSSMEMQGRANTS.


*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_MSSMEMQGRANTS_STR, 
SESSID TYPE STRING,
REQID TYPE STRING,
SCHEDID TYPE STRING,
DOP TYPE STRING,
REQTIME TYPE STRING,
GRANTTIME TYPE STRING,
REQMEMKB TYPE STRING,
GRANTMEMKB TYPE STRING,
REQRMEMKB TYPE STRING,
USEDMEMKB TYPE STRING,
MAXUSEDMEMKB TYPE STRING,
QCOST TYPE STRING,
TIMEOUTSEC TYPE STRING,
RESSEMID TYPE STRING,
QUEUEID TYPE STRING,
WAITORDER TYPE STRING,
ISNEXTCND TYPE STRING,
WAITMS TYPE STRING,
PLANHANDLE TYPE STRING,
SQLHANDLE TYPE STRING,
GRPID TYPE STRING,
POOLID TYPE STRING,
ISSMALL TYPE STRING,
IDEALMEMKB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MSSMEMQGRANTS_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_MSSMEMQGRANTS_STR-SESSID sy-vline 
WA_MSSMEMQGRANTS_STR-REQID sy-vline 
WA_MSSMEMQGRANTS_STR-SCHEDID sy-vline 
WA_MSSMEMQGRANTS_STR-DOP sy-vline 
WA_MSSMEMQGRANTS_STR-REQTIME sy-vline 
WA_MSSMEMQGRANTS_STR-GRANTTIME sy-vline 
WA_MSSMEMQGRANTS_STR-REQMEMKB sy-vline 
WA_MSSMEMQGRANTS_STR-GRANTMEMKB sy-vline 
WA_MSSMEMQGRANTS_STR-REQRMEMKB sy-vline 
WA_MSSMEMQGRANTS_STR-USEDMEMKB sy-vline 
WA_MSSMEMQGRANTS_STR-MAXUSEDMEMKB sy-vline 
WA_MSSMEMQGRANTS_STR-QCOST sy-vline 
WA_MSSMEMQGRANTS_STR-TIMEOUTSEC sy-vline 
WA_MSSMEMQGRANTS_STR-RESSEMID sy-vline 
WA_MSSMEMQGRANTS_STR-QUEUEID sy-vline 
WA_MSSMEMQGRANTS_STR-WAITORDER sy-vline 
WA_MSSMEMQGRANTS_STR-ISNEXTCND sy-vline 
WA_MSSMEMQGRANTS_STR-WAITMS sy-vline 
WA_MSSMEMQGRANTS_STR-PLANHANDLE sy-vline 
WA_MSSMEMQGRANTS_STR-SQLHANDLE sy-vline 
WA_MSSMEMQGRANTS_STR-GRPID sy-vline 
WA_MSSMEMQGRANTS_STR-POOLID sy-vline 
WA_MSSMEMQGRANTS_STR-ISSMALL sy-vline 
WA_MSSMEMQGRANTS_STR-IDEALMEMKB sy-vline      INTO ld_text SEPARATED BY SPACE.

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