ABAP Select data from SAP table HTTP_API 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 HTTP_API 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 HTTP_API. 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 HTTP_API 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_HTTP_API TYPE STANDARD TABLE OF HTTP_API,
      WA_HTTP_API TYPE HTTP_API,
      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: <HTTP_API> TYPE HTTP_API.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HTTP_API
*  INTO TABLE @DATA(IT_HTTP_API2).
*--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_HTTP_API INDEX 1 INTO DATA(WA_HTTP_API2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HTTP_API>-COMMAND = 1.
<HTTP_API>-CONTREP = 1.
<HTTP_API>-ARCHIVE = 1.
<HTTP_API>-DOCID = 1.
<HTTP_API>-ACCESSMODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HTTP_API-COMPID, sy-vline,
  WA_HTTP_API-FROMOFFSET, sy-vline,
  WA_HTTP_API-TOOFFSET, sy-vline,
  WA_HTTP_API-DOCTYPE, sy-vline,
  WA_HTTP_API-DOCPROT, sy-vline,
  WA_HTTP_API-INFOPROT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HTTP_API 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_HTTP_API 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_HTTP_API INTO WA_HTTP_API.


*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_HTTP_API_STR, 
COMMAND TYPE STRING,
CONTREP TYPE STRING,
ARCHIVE TYPE STRING,
DOCID TYPE STRING,
ACCESSMODE TYPE STRING,
COMPID TYPE STRING,
FROMOFFSET TYPE STRING,
TOOFFSET TYPE STRING,
DOCTYPE TYPE STRING,
DOCPROT TYPE STRING,
INFOPROT TYPE STRING,
ROOTOBJECT TYPE STRING,
RESULTAS TYPE STRING,
LONG TYPE STRING,
PATTERN TYPE STRING,
CASESENSIT TYPE STRING,
FROMCOLUMN TYPE STRING,
TOCOLUMN TYPE STRING,
NUMRESULTS TYPE STRING,
VERSION TYPE STRING,
LENGTH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HTTP_API_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_HTTP_API_STR-COMMAND sy-vline 
WA_HTTP_API_STR-CONTREP sy-vline 
WA_HTTP_API_STR-ARCHIVE sy-vline 
WA_HTTP_API_STR-DOCID sy-vline 
WA_HTTP_API_STR-ACCESSMODE sy-vline 
WA_HTTP_API_STR-COMPID sy-vline 
WA_HTTP_API_STR-FROMOFFSET sy-vline 
WA_HTTP_API_STR-TOOFFSET sy-vline 
WA_HTTP_API_STR-DOCTYPE sy-vline 
WA_HTTP_API_STR-DOCPROT sy-vline 
WA_HTTP_API_STR-INFOPROT sy-vline 
WA_HTTP_API_STR-ROOTOBJECT sy-vline 
WA_HTTP_API_STR-RESULTAS sy-vline 
WA_HTTP_API_STR-LONG sy-vline 
WA_HTTP_API_STR-PATTERN sy-vline 
WA_HTTP_API_STR-CASESENSIT sy-vline 
WA_HTTP_API_STR-FROMCOLUMN sy-vline 
WA_HTTP_API_STR-TOCOLUMN sy-vline 
WA_HTTP_API_STR-NUMRESULTS sy-vline 
WA_HTTP_API_STR-VERSION sy-vline 
WA_HTTP_API_STR-LENGTH sy-vline      INTO ld_text SEPARATED BY SPACE.

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