ABAP Select data from SAP table CUST1120 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CUST1120 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 CUST1120. 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 CUST1120 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_CUST1120 TYPE STANDARD TABLE OF CUST1120,
      WA_CUST1120 TYPE CUST1120,
      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: <CUST1120> TYPE CUST1120.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CUST1120.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CUST1120
  INTO TABLE IT_CUST1120.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CUST1120
*  INTO TABLE @DATA(IT_CUST11202).
*--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_CUST1120 INDEX 1 INTO DATA(WA_CUST11202).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CUST1120 ASSIGNING <CUST1120>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CUST1120>-MTSYSID = 1.
<CUST1120>-MTMCNAME = 1.
<CUST1120>-MTNUMRANGE = 1.
<CUST1120>-MTUID = 1.
<CUST1120>-MTCLASS = 1.

ENDLOOP.

LOOP AT IT_CUST1120 INTO WA_CUST1120.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CUST1120-SETNAME, sy-vline,
  WA_CUST1120-MTINDEX, sy-vline,
  WA_CUST1120-EXTINDEX, sy-vline,
  WA_CUST1120-OBJECTNAME, sy-vline,
  WA_CUST1120-MTNAMESHRT, sy-vline,
  WA_CUST1120-DBSTATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CUST1120 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_CUST1120 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_CUST1120 INTO WA_CUST1120.


*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_CUST1120_STR, 
MTSYSID TYPE STRING,
MTMCNAME TYPE STRING,
MTNUMRANGE TYPE STRING,
MTUID TYPE STRING,
MTCLASS TYPE STRING,
SETNAME TYPE STRING,
MTINDEX TYPE STRING,
EXTINDEX TYPE STRING,
OBJECTNAME TYPE STRING,
MTNAMESHRT TYPE STRING,
DBSTATUS TYPE STRING,
RELVALTYPE TYPE STRING,
THRESHDIR TYPE STRING,
THRESHG2Y TYPE STRING,
THRESHY2R TYPE STRING,
THRESHY2G TYPE STRING,
THRESHR2Y TYPE STRING,
MSGCLASS TYPE STRING,
MSGID TYPE STRING,
VALUNIT TYPE STRING,
DECIMALS TYPE STRING,
CRTBYASSI TYPE STRING,
CHG_USER TYPE STRING,
CHG_DATE TYPE STRING,
CHG_TIME TYPE STRING,
MT_NAME TYPE STRING,
STATUSTEXT TYPE STRING,
DIR_BELOW TYPE STRING,
DIR_ABOVE TYPE STRING,
RELV_LAST TYPE STRING,
RELV_HOUR TYPE STRING,
RELV_QUART TYPE STRING,
RELV_SMO01 TYPE STRING,
RELV_SMO05 TYPE STRING,
RELV_SMO15 TYPE STRING,
UNIT1 TYPE STRING,
UNIT2 TYPE STRING,
UNIT3 TYPE STRING,
UNIT4 TYPE STRING,
T100_ARBGB TYPE STRING,
T100_MSGNR TYPE STRING,
T100_TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CUST1120_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_CUST1120_STR-MTSYSID sy-vline 
WA_CUST1120_STR-MTMCNAME sy-vline 
WA_CUST1120_STR-MTNUMRANGE sy-vline 
WA_CUST1120_STR-MTUID sy-vline 
WA_CUST1120_STR-MTCLASS sy-vline 
WA_CUST1120_STR-SETNAME sy-vline 
WA_CUST1120_STR-MTINDEX sy-vline 
WA_CUST1120_STR-EXTINDEX sy-vline 
WA_CUST1120_STR-OBJECTNAME sy-vline 
WA_CUST1120_STR-MTNAMESHRT sy-vline 
WA_CUST1120_STR-DBSTATUS sy-vline 
WA_CUST1120_STR-RELVALTYPE sy-vline 
WA_CUST1120_STR-THRESHDIR sy-vline 
WA_CUST1120_STR-THRESHG2Y sy-vline 
WA_CUST1120_STR-THRESHY2R sy-vline 
WA_CUST1120_STR-THRESHY2G sy-vline 
WA_CUST1120_STR-THRESHR2Y sy-vline 
WA_CUST1120_STR-MSGCLASS sy-vline 
WA_CUST1120_STR-MSGID sy-vline 
WA_CUST1120_STR-VALUNIT sy-vline 
WA_CUST1120_STR-DECIMALS sy-vline 
WA_CUST1120_STR-CRTBYASSI sy-vline 
WA_CUST1120_STR-CHG_USER sy-vline 
WA_CUST1120_STR-CHG_DATE sy-vline 
WA_CUST1120_STR-CHG_TIME sy-vline 
WA_CUST1120_STR-MT_NAME sy-vline 
WA_CUST1120_STR-STATUSTEXT sy-vline 
WA_CUST1120_STR-DIR_BELOW sy-vline 
WA_CUST1120_STR-DIR_ABOVE sy-vline 
WA_CUST1120_STR-RELV_LAST sy-vline 
WA_CUST1120_STR-RELV_HOUR sy-vline 
WA_CUST1120_STR-RELV_QUART sy-vline 
WA_CUST1120_STR-RELV_SMO01 sy-vline 
WA_CUST1120_STR-RELV_SMO05 sy-vline 
WA_CUST1120_STR-RELV_SMO15 sy-vline 
WA_CUST1120_STR-UNIT1 sy-vline 
WA_CUST1120_STR-UNIT2 sy-vline 
WA_CUST1120_STR-UNIT3 sy-vline 
WA_CUST1120_STR-UNIT4 sy-vline 
WA_CUST1120_STR-T100_ARBGB sy-vline 
WA_CUST1120_STR-T100_MSGNR sy-vline 
WA_CUST1120_STR-T100_TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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