ABAP Select data from SAP table APL_S_ODATA_APPL_LOG_HEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM APL_S_ODATA_APPL_LOG_HEADER
*  INTO TABLE @DATA(IT_APL_S_ODATA_APPL_LOG_HEADER2).
*--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_APL_S_ODATA_APPL_LOG_HEADER INDEX 1 INTO DATA(WA_APL_S_ODATA_APPL_LOG_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<APL_S_ODATA_APPL_LOG_HEADER>-LOGNUMBER = 1.
<APL_S_ODATA_APPL_LOG_HEADER>-OBJECT = 1.
<APL_S_ODATA_APPL_LOG_HEADER>-SUBOBJECT = 1.
<APL_S_ODATA_APPL_LOG_HEADER>-EXTNUMBER = 1.
<APL_S_ODATA_APPL_LOG_HEADER>-ALDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_APL_S_ODATA_APPL_LOG_HEADER-ALTIME, sy-vline,
  WA_APL_S_ODATA_APPL_LOG_HEADER-ALUSER, sy-vline,
  WA_APL_S_ODATA_APPL_LOG_HEADER-ALTCODE, sy-vline,
  WA_APL_S_ODATA_APPL_LOG_HEADER-ALPROG, sy-vline,
  WA_APL_S_ODATA_APPL_LOG_HEADER-ALMODE, sy-vline,
  WA_APL_S_ODATA_APPL_LOG_HEADER-ALTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_APL_S_ODATA_APPL_LOG_HEADER 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_APL_S_ODATA_APPL_LOG_HEADER 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_APL_S_ODATA_APPL_LOG_HEADER INTO WA_APL_S_ODATA_APPL_LOG_HEADER.


*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_APL_S_ODATA_APPL_LOG_HEADER_STR, 
LOGNUMBER TYPE STRING,
OBJECT TYPE STRING,
SUBOBJECT TYPE STRING,
EXTNUMBER TYPE STRING,
ALDATE TYPE STRING,
ALTIME TYPE STRING,
ALUSER TYPE STRING,
ALTCODE TYPE STRING,
ALPROG TYPE STRING,
ALMODE TYPE STRING,
ALTEXT TYPE STRING,
USEREXITP TYPE STRING,
USEREXITF TYPE STRING,
PROBCLASS TYPE STRING,
ALDATE_DEL TYPE STRING,
DEL_BEFORE TYPE STRING,
ALSTATE TYPE STRING,
USEREXITT TYPE STRING,
ALCHDATE TYPE STRING,
ALCHTIME TYPE STRING,
ALCHUSER TYPE STRING,
LOG_HANDLE TYPE STRING,
TABNAME TYPE STRING,
MSG_CNT_AL TYPE STRING,
MSG_CNT_A TYPE STRING,
MSG_CNT_E TYPE STRING,
MSG_CNT_W TYPE STRING,
MSG_CNT_I TYPE STRING,
MSG_CNT_S TYPE STRING,
LAST_MSGNR TYPE STRING,
TIM_STMP TYPE STRING,
DB_VERSION TYPE STRING,
MSG_CNT_P1 TYPE STRING,
MSG_CNT_P2 TYPE STRING,
MSG_CNT_P3 TYPE STRING,
MSG_CNT_P4 TYPE STRING,
CLIENT_CRE TYPE STRING,
CHAR_SIZE TYPE STRING,
SEARCH_DATETIME TYPE STRING,
CREATED_AT TYPE STRING,
OBJ_TXT TYPE STRING,
SUBOBJ_TXT TYPE STRING,
SEVERITY TYPE STRING,
LOG_CREATED_BY_FORMATTED_NAME TYPE STRING,
HAS_MSG_CTX_FIELD1 TYPE STRING,
HAS_MSG_CTX_FIELD2 TYPE STRING,
HAS_MSG_CTX_FIELD3 TYPE STRING,
HAS_MSG_CTX_FIELD4 TYPE STRING,
HAS_MSG_CTX_FIELD5 TYPE STRING,
MSG_CTX_FIELD1_LABEL TYPE STRING,
MSG_CTX_FIELD2_LABEL TYPE STRING,
MSG_CTX_FIELD3_LABEL TYPE STRING,
MSG_CTX_FIELD4_LABEL TYPE STRING,
MSG_CTX_FIELD5_LABEL TYPE STRING,
MSG_CTX_FIELD1_TYPE TYPE STRING,
MSG_CTX_FIELD2_TYPE TYPE STRING,
MSG_CTX_FIELD3_TYPE TYPE STRING,
MSG_CTX_FIELD4_TYPE TYPE STRING,
MSG_CTX_FIELD5_TYPE TYPE STRING,
SEVERITY_TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_APL_S_ODATA_APPL_LOG_HEADER_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_APL_S_ODATA_APPL_LOG_HEADER_STR-LOGNUMBER sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-OBJECT sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-SUBOBJECT sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-EXTNUMBER sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-ALDATE sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-ALTIME sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-ALUSER sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-ALTCODE sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-ALPROG sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-ALMODE sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-ALTEXT sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-USEREXITP sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-USEREXITF sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-PROBCLASS sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-ALDATE_DEL sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-DEL_BEFORE sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-ALSTATE sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-USEREXITT sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-ALCHDATE sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-ALCHTIME sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-ALCHUSER sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-LOG_HANDLE sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-TABNAME sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CNT_AL sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CNT_A sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CNT_E sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CNT_W sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CNT_I sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CNT_S sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-LAST_MSGNR sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-TIM_STMP sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-DB_VERSION sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CNT_P1 sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CNT_P2 sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CNT_P3 sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CNT_P4 sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-CLIENT_CRE sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-CHAR_SIZE sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-SEARCH_DATETIME sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-CREATED_AT sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-OBJ_TXT sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-SUBOBJ_TXT sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-SEVERITY sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-LOG_CREATED_BY_FORMATTED_NAME sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-HAS_MSG_CTX_FIELD1 sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-HAS_MSG_CTX_FIELD2 sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-HAS_MSG_CTX_FIELD3 sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-HAS_MSG_CTX_FIELD4 sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-HAS_MSG_CTX_FIELD5 sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CTX_FIELD1_LABEL sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CTX_FIELD2_LABEL sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CTX_FIELD3_LABEL sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CTX_FIELD4_LABEL sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CTX_FIELD5_LABEL sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CTX_FIELD1_TYPE sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CTX_FIELD2_TYPE sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CTX_FIELD3_TYPE sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CTX_FIELD4_TYPE sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-MSG_CTX_FIELD5_TYPE sy-vline 
WA_APL_S_ODATA_APPL_LOG_HEADER_STR-SEVERITY_TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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