ABAP Select data from SAP table LTR2_RN_MAPMGR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LTR2_RN_MAPMGR 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 LTR2_RN_MAPMGR. 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 LTR2_RN_MAPMGR 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_LTR2_RN_MAPMGR TYPE STANDARD TABLE OF LTR2_RN_MAPMGR,
      WA_LTR2_RN_MAPMGR TYPE LTR2_RN_MAPMGR,
      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: <LTR2_RN_MAPMGR> TYPE LTR2_RN_MAPMGR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_LTR2_RN_MAPMGR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM LTR2_RN_MAPMGR
  INTO TABLE IT_LTR2_RN_MAPMGR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LTR2_RN_MAPMGR
*  INTO TABLE @DATA(IT_LTR2_RN_MAPMGR2).
*--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_LTR2_RN_MAPMGR INDEX 1 INTO DATA(WA_LTR2_RN_MAPMGR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_LTR2_RN_MAPMGR ASSIGNING <LTR2_RN_MAPMGR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LTR2_RN_MAPMGR>-RN_GUID = 1.
<LTR2_RN_MAPMGR>-OBJECT = 1.
<LTR2_RN_MAPMGR>-SUBOBJECT = 1.
<LTR2_RN_MAPMGR>-NRRANGENR = 1.
<LTR2_RN_MAPMGR>-TOYEAR = 1.

ENDLOOP.

LOOP AT IT_LTR2_RN_MAPMGR INTO WA_LTR2_RN_MAPMGR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LTR2_RN_MAPMGR-MAP_MODE, sy-vline,
  WA_LTR2_RN_MAPMGR-MAP_BUILT, sy-vline,
  WA_LTR2_RN_MAPMGR-MAX_BUILT_VAL, sy-vline,
  WA_LTR2_RN_MAPMGR-MAP_OFFSET, sy-vline,
  WA_LTR2_RN_MAPMGR-USED, sy-vline,
  WA_LTR2_RN_MAPMGR-MAX_USED_VAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LTR2_RN_MAPMGR 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_LTR2_RN_MAPMGR 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_LTR2_RN_MAPMGR INTO WA_LTR2_RN_MAPMGR.


*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 GJAHR, internal->external for field TOYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_LTR2_RN_MAPMGR-TOYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTR2_RN_MAPMGR-TOYEAR.
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_LTR2_RN_MAPMGR_STR, 
RN_GUID TYPE STRING,
OBJECT TYPE STRING,
SUBOBJECT TYPE STRING,
NRRANGENR TYPE STRING,
TOYEAR TYPE STRING,
MAP_MODE TYPE STRING,
MAP_BUILT TYPE STRING,
MAX_BUILT_VAL TYPE STRING,
MAP_OFFSET TYPE STRING,
USED TYPE STRING,
MAX_USED_VAL TYPE STRING,
ADJUST_MODE TYPE STRING,
CHK_STATUS TYPE STRING,
SOURCE TYPE STRING,
TOL_OFFSET TYPE STRING,
ANALYZED TYPE STRING,
EXTERNIND TYPE STRING,
NR_STATE TYPE STRING,
NRLEVEL_STATE TYPE STRING,
ADJUST_NUM TYPE STRING,
ADJUST_VALUE TYPE STRING,
ANA_USED_NO TYPE STRING,
APPL_TABLE_ANALYZED TYPE STRING,
LOG_FLAG TYPE STRING,
PROC_MODE TYPE STRING,
PROC_PARAM TYPE STRING,
AUTO_CREATE TYPE STRING,
PREFIX TYPE STRING,
BUILD_TS TYPE STRING,
ADJUST_EXT_VAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LTR2_RN_MAPMGR_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_LTR2_RN_MAPMGR_STR-RN_GUID sy-vline 
WA_LTR2_RN_MAPMGR_STR-OBJECT sy-vline 
WA_LTR2_RN_MAPMGR_STR-SUBOBJECT sy-vline 
WA_LTR2_RN_MAPMGR_STR-NRRANGENR sy-vline 
WA_LTR2_RN_MAPMGR_STR-TOYEAR sy-vline 
WA_LTR2_RN_MAPMGR_STR-MAP_MODE sy-vline 
WA_LTR2_RN_MAPMGR_STR-MAP_BUILT sy-vline 
WA_LTR2_RN_MAPMGR_STR-MAX_BUILT_VAL sy-vline 
WA_LTR2_RN_MAPMGR_STR-MAP_OFFSET sy-vline 
WA_LTR2_RN_MAPMGR_STR-USED sy-vline 
WA_LTR2_RN_MAPMGR_STR-MAX_USED_VAL sy-vline 
WA_LTR2_RN_MAPMGR_STR-ADJUST_MODE sy-vline 
WA_LTR2_RN_MAPMGR_STR-CHK_STATUS sy-vline 
WA_LTR2_RN_MAPMGR_STR-SOURCE sy-vline 
WA_LTR2_RN_MAPMGR_STR-TOL_OFFSET sy-vline 
WA_LTR2_RN_MAPMGR_STR-ANALYZED sy-vline 
WA_LTR2_RN_MAPMGR_STR-EXTERNIND sy-vline 
WA_LTR2_RN_MAPMGR_STR-NR_STATE sy-vline 
WA_LTR2_RN_MAPMGR_STR-NRLEVEL_STATE sy-vline 
WA_LTR2_RN_MAPMGR_STR-ADJUST_NUM sy-vline 
WA_LTR2_RN_MAPMGR_STR-ADJUST_VALUE sy-vline 
WA_LTR2_RN_MAPMGR_STR-ANA_USED_NO sy-vline 
WA_LTR2_RN_MAPMGR_STR-APPL_TABLE_ANALYZED sy-vline 
WA_LTR2_RN_MAPMGR_STR-LOG_FLAG sy-vline 
WA_LTR2_RN_MAPMGR_STR-PROC_MODE sy-vline 
WA_LTR2_RN_MAPMGR_STR-PROC_PARAM sy-vline 
WA_LTR2_RN_MAPMGR_STR-AUTO_CREATE sy-vline 
WA_LTR2_RN_MAPMGR_STR-PREFIX sy-vline 
WA_LTR2_RN_MAPMGR_STR-BUILD_TS sy-vline 
WA_LTR2_RN_MAPMGR_STR-ADJUST_EXT_VAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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