ABAP Select data from SAP table LGRWO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LGRWO
*  INTO TABLE @DATA(IT_LGRWO2).
*--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_LGRWO INDEX 1 INTO DATA(WA_LGRWO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LGRWO>-COLWD = 1.
<LGRWO>-DECIP = 1.
<LGRWO>-ROUND = 1.
<LGRWO>-SUM_FROM = 1.
<LGRWO>-SUM_TO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LGRWO-SUM_MAX, sy-vline,
  WA_LGRWO-FPAGE, sy-vline,
  WA_LGRWO-TPAGE, sy-vline,
  WA_LGRWO-FCOLUMN, sy-vline,
  WA_LGRWO-TCOLUMN, sy-vline,
  WA_LGRWO-FORMAT1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LGRWO 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_LGRWO 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_LGRWO INTO WA_LGRWO.


*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_LGRWO_STR, 
COLWD TYPE STRING,
DECIP TYPE STRING,
ROUND TYPE STRING,
SUM_FROM TYPE STRING,
SUM_TO TYPE STRING,
SUM_MAX TYPE STRING,
FPAGE TYPE STRING,
TPAGE TYPE STRING,
FCOLUMN TYPE STRING,
TCOLUMN TYPE STRING,
FORMAT1 TYPE STRING,
FORMAT2 TYPE STRING,
COL_ORDER TYPE STRING,
SETTEXT TYPE STRING,
ENTRYACT TYPE STRING,
ENTRYMAX TYPE STRING,
VAR_VALUE TYPE STRING,
VAR_SET TYPE STRING,
FIELD_TEXT TYPE STRING,
OUT_FILE TYPE STRING,
EXP_FILE TYPE STRING,
ACTIVE TYPE STRING,
LEVEL_L TYPE STRING,
SETNR_L TYPE STRING,
VALUE_L TYPE STRING,
TEXT_L TYPE STRING,
LEVEL_G TYPE STRING,
SETNR_G TYPE STRING,
VALUE_G TYPE STRING,
TEXT_G TYPE STRING,
VAR_FTEXT TYPE STRING,
VAR_LEVEL TYPE STRING,
VAR_SETVAL TYPE STRING,
VAR_TEXT TYPE STRING,
VAR_GLOBAL TYPE STRING,
VAR_LOCAL TYPE STRING,
PC_FORMAT TYPE STRING,
RW_PROGRAM TYPE STRING,
RW_COMMAND TYPE STRING,
MAX_PAGENR TYPE STRING,
CUR_PAGENR TYPE STRING,
NEW_PAGENR TYPE STRING,
PAGE_MODE TYPE STRING,
SAVE_PARMS TYPE STRING,
PRINT_ALL TYPE STRING,
PRINT_PAGE TYPE STRING,
PRINT_SEL TYPE STRING,
LINCT_DEF TYPE STRING,
LINCT_WIN TYPE STRING,
LINCT_SEL TYPE STRING,
LINCT_SELV TYPE STRING,
MAC_SGNTR TYPE STRING,
MAC_CMD TYPE STRING,
MAC_X1 TYPE STRING,
MAC_X2 TYPE STRING,
WIN_X1 TYPE STRING,
WIN_X2 TYPE STRING,
MAC_SGRTXT TYPE STRING,
RW_EXPONLY TYPE STRING,
X_EXPONLY1 TYPE STRING,
X_EXPONLY2 TYPE STRING,
X_SPREADSH TYPE STRING,
X_DBASE TYPE STRING,
X_WK1 TYPE STRING,
X_EXCEL TYPE STRING,
X_TEXTPROC TYPE STRING,
X_HTML TYPE STRING,
X_FORMAT_AMOUNTS TYPE STRING,
SEARCH_STRING TYPE STRING,
R_FROM_CURSOR TYPE STRING,
R_FROM_TOP TYPE STRING,
R_HIT_FIRST TYPE STRING,
R_HIT_ALL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LGRWO_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_LGRWO_STR-COLWD sy-vline 
WA_LGRWO_STR-DECIP sy-vline 
WA_LGRWO_STR-ROUND sy-vline 
WA_LGRWO_STR-SUM_FROM sy-vline 
WA_LGRWO_STR-SUM_TO sy-vline 
WA_LGRWO_STR-SUM_MAX sy-vline 
WA_LGRWO_STR-FPAGE sy-vline 
WA_LGRWO_STR-TPAGE sy-vline 
WA_LGRWO_STR-FCOLUMN sy-vline 
WA_LGRWO_STR-TCOLUMN sy-vline 
WA_LGRWO_STR-FORMAT1 sy-vline 
WA_LGRWO_STR-FORMAT2 sy-vline 
WA_LGRWO_STR-COL_ORDER sy-vline 
WA_LGRWO_STR-SETTEXT sy-vline 
WA_LGRWO_STR-ENTRYACT sy-vline 
WA_LGRWO_STR-ENTRYMAX sy-vline 
WA_LGRWO_STR-VAR_VALUE sy-vline 
WA_LGRWO_STR-VAR_SET sy-vline 
WA_LGRWO_STR-FIELD_TEXT sy-vline 
WA_LGRWO_STR-OUT_FILE sy-vline 
WA_LGRWO_STR-EXP_FILE sy-vline 
WA_LGRWO_STR-ACTIVE sy-vline 
WA_LGRWO_STR-LEVEL_L sy-vline 
WA_LGRWO_STR-SETNR_L sy-vline 
WA_LGRWO_STR-VALUE_L sy-vline 
WA_LGRWO_STR-TEXT_L sy-vline 
WA_LGRWO_STR-LEVEL_G sy-vline 
WA_LGRWO_STR-SETNR_G sy-vline 
WA_LGRWO_STR-VALUE_G sy-vline 
WA_LGRWO_STR-TEXT_G sy-vline 
WA_LGRWO_STR-VAR_FTEXT sy-vline 
WA_LGRWO_STR-VAR_LEVEL sy-vline 
WA_LGRWO_STR-VAR_SETVAL sy-vline 
WA_LGRWO_STR-VAR_TEXT sy-vline 
WA_LGRWO_STR-VAR_GLOBAL sy-vline 
WA_LGRWO_STR-VAR_LOCAL sy-vline 
WA_LGRWO_STR-PC_FORMAT sy-vline 
WA_LGRWO_STR-RW_PROGRAM sy-vline 
WA_LGRWO_STR-RW_COMMAND sy-vline 
WA_LGRWO_STR-MAX_PAGENR sy-vline 
WA_LGRWO_STR-CUR_PAGENR sy-vline 
WA_LGRWO_STR-NEW_PAGENR sy-vline 
WA_LGRWO_STR-PAGE_MODE sy-vline 
WA_LGRWO_STR-SAVE_PARMS sy-vline 
WA_LGRWO_STR-PRINT_ALL sy-vline 
WA_LGRWO_STR-PRINT_PAGE sy-vline 
WA_LGRWO_STR-PRINT_SEL sy-vline 
WA_LGRWO_STR-LINCT_DEF sy-vline 
WA_LGRWO_STR-LINCT_WIN sy-vline 
WA_LGRWO_STR-LINCT_SEL sy-vline 
WA_LGRWO_STR-LINCT_SELV sy-vline 
WA_LGRWO_STR-MAC_SGNTR sy-vline 
WA_LGRWO_STR-MAC_CMD sy-vline 
WA_LGRWO_STR-MAC_X1 sy-vline 
WA_LGRWO_STR-MAC_X2 sy-vline 
WA_LGRWO_STR-WIN_X1 sy-vline 
WA_LGRWO_STR-WIN_X2 sy-vline 
WA_LGRWO_STR-MAC_SGRTXT sy-vline 
WA_LGRWO_STR-RW_EXPONLY sy-vline 
WA_LGRWO_STR-X_EXPONLY1 sy-vline 
WA_LGRWO_STR-X_EXPONLY2 sy-vline 
WA_LGRWO_STR-X_SPREADSH sy-vline 
WA_LGRWO_STR-X_DBASE sy-vline 
WA_LGRWO_STR-X_WK1 sy-vline 
WA_LGRWO_STR-X_EXCEL sy-vline 
WA_LGRWO_STR-X_TEXTPROC sy-vline 
WA_LGRWO_STR-X_HTML sy-vline 
WA_LGRWO_STR-X_FORMAT_AMOUNTS sy-vline 
WA_LGRWO_STR-SEARCH_STRING sy-vline 
WA_LGRWO_STR-R_FROM_CURSOR sy-vline 
WA_LGRWO_STR-R_FROM_TOP sy-vline 
WA_LGRWO_STR-R_HIT_FIRST sy-vline 
WA_LGRWO_STR-R_HIT_ALL sy-vline      INTO ld_text SEPARATED BY SPACE.

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