ABAP Select data from SAP table T370T into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T370T 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 T370T. 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 T370T 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_T370T TYPE STANDARD TABLE OF T370T,
      WA_T370T TYPE T370T,
      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: <T370T> TYPE T370T.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T370T.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T370T
  INTO TABLE IT_T370T.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T370T
*  INTO TABLE @DATA(IT_T370T2).
*--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_T370T INDEX 1 INTO DATA(WA_T370T2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T370T ASSIGNING <T370T>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T370T>-MANDT = 1.
<T370T>-EQTYP = 1.
<T370T>-REFTP = 1.
<T370T>-NUMKI = 1.
<T370T>-NUMKE = 1.

ENDLOOP.

LOOP AT IT_T370T INTO WA_T370T.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T370T-ZEIIN, sy-vline,
  WA_T370T-TPEIN, sy-vline,
  WA_T370T-MSTKZ, sy-vline,
  WA_T370T-AEBKZ, sy-vline,
  WA_T370T-PUEMA, sy-vline,
  WA_T370T-STADY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T370T 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_T370T 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_T370T INTO WA_T370T.


*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 PARVW, internal->external for field PARK1
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_T370T-PARK1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T370T-PARK1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field PARK2
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_T370T-PARK2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T370T-PARK2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field PARK3
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_T370T-PARK3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T370T-PARK3.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field PARK4
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_T370T-PARK4
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T370T-PARK4.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field PARK5
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_T370T-PARK5
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T370T-PARK5.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TMPLA, internal->external for field TSEGTP
CALL FUNCTION 'CONVERSION_EXIT_TMPLA_OUTPUT'
  EXPORTING
    input =                      WA_T370T-TSEGTP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T370T-TSEGTP.
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_T370T_STR, 
MANDT TYPE STRING,
EQTYP TYPE STRING,
REFTP TYPE STRING,
NUMKI TYPE STRING,
NUMKE TYPE STRING,
ZEIIN TYPE STRING,
TPEIN TYPE STRING,
MSTKZ TYPE STRING,
AEBKZ TYPE STRING,
PUEMA TYPE STRING,
STADY TYPE STRING,
STSMA TYPE STRING,
SDEQT TYPE STRING,
PARGR TYPE STRING,
PARK1 TYPE STRING,
PARK2 TYPE STRING,
PARK3 TYPE STRING,
PARK4 TYPE STRING,
PARK5 TYPE STRING,
INFOW TYPE STRING,
AMKNZ TYPE STRING,
WFKNZ TYPE STRING,
PASYN TYPE STRING,
KZKSD TYPE STRING,
KONFKNZ TYPE STRING,
SDKNZ TYPE STRING,
FHMKZ TYPE STRING,
ELSE_KNZ TYPE STRING,
ISU_KNZ TYPE STRING,
TSEGTP TYPE STRING,
VIEW_PROF TYPE STRING,
NO_SER_ENQ TYPE STRING,
BTMNS TYPE STRING,
CC_KNZ TYPE STRING,
AEBKZ_INS TYPE STRING,
LFE_IND TYPE STRING,
J_3GBAUKNZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T370T_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_T370T_STR-MANDT sy-vline 
WA_T370T_STR-EQTYP sy-vline 
WA_T370T_STR-REFTP sy-vline 
WA_T370T_STR-NUMKI sy-vline 
WA_T370T_STR-NUMKE sy-vline 
WA_T370T_STR-ZEIIN sy-vline 
WA_T370T_STR-TPEIN sy-vline 
WA_T370T_STR-MSTKZ sy-vline 
WA_T370T_STR-AEBKZ sy-vline 
WA_T370T_STR-PUEMA sy-vline 
WA_T370T_STR-STADY sy-vline 
WA_T370T_STR-STSMA sy-vline 
WA_T370T_STR-SDEQT sy-vline 
WA_T370T_STR-PARGR sy-vline 
WA_T370T_STR-PARK1 sy-vline 
WA_T370T_STR-PARK2 sy-vline 
WA_T370T_STR-PARK3 sy-vline 
WA_T370T_STR-PARK4 sy-vline 
WA_T370T_STR-PARK5 sy-vline 
WA_T370T_STR-INFOW sy-vline 
WA_T370T_STR-AMKNZ sy-vline 
WA_T370T_STR-WFKNZ sy-vline 
WA_T370T_STR-PASYN sy-vline 
WA_T370T_STR-KZKSD sy-vline 
WA_T370T_STR-KONFKNZ sy-vline 
WA_T370T_STR-SDKNZ sy-vline 
WA_T370T_STR-FHMKZ sy-vline 
WA_T370T_STR-ELSE_KNZ sy-vline 
WA_T370T_STR-ISU_KNZ sy-vline 
WA_T370T_STR-TSEGTP sy-vline 
WA_T370T_STR-VIEW_PROF sy-vline 
WA_T370T_STR-NO_SER_ENQ sy-vline 
WA_T370T_STR-BTMNS sy-vline 
WA_T370T_STR-CC_KNZ sy-vline 
WA_T370T_STR-AEBKZ_INS sy-vline 
WA_T370T_STR-LFE_IND sy-vline 
WA_T370T_STR-J_3GBAUKNZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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