GOTO

Translation reference for the conversion of Goto command to Snowflake Scripting

Description

The BTEQ Goto command skips over all intervening BTEQ commands and SQL statements until a specified label is encountered, then resumes processing as usual. (Teradata Basic Query Reference Goto Command)

.GOTO LabelName;

Sample Source Patterns

Basic GOTO example

Snowflake scripting doesn't have an equivalent statement for Teradata BTEQ Goto command, but fortunately it can be removed from the input code and get an equivalent code, due to the sequence of Goto and Labels commands in reverse topological order always. In other words, the definitions come after their uses. Thus, Snowconvert just needs to copy bottom-up all Label section code to its corresponding Goto statements.

Teradata BTEQ

IN -> Teradata_01.bteq

-- Additional Params: -q SnowScript
.LOGON 0/dbc,dbc;
   DATABASE tduser;
.LOGON 127.0.0.1/dbc,dbc;

INSERT INTO TABLEB VALUES (1);
.IF activitycount = 0 then .GOTO SECTIONA
.IF activitycount >= 1 then .GOTO SECTIONB

.label SECTIONA
.REMARK 'Zero Hours on Account'
.GOTO SECTIONC

.label SECTIONB
.REMARK 'Total Hours on Account'

.label SECTIONC
.logoff      
.exit

Snowflake

OUT -> Teradata_01.sql

EXECUTE IMMEDIATE
$$
  DECLARE
    STATUS_OBJECT OBJECT := OBJECT_CONSTRUCT('SQLCODE', 0);
  BEGIN
    -- Additional Params: -q SnowScript
    --.LOGON 0/dbc,dbc
    !!!RESOLVE EWI!!! /*** SSC-EWI-0073 - PENDING FUNCTIONAL EQUIVALENCE REVIEW FOR 'BTLogOn' NODE ***/!!!
    null;
    BEGIN
      USE DATABASE tduser;
      STATUS_OBJECT := OBJECT_CONSTRUCT('SQLROWCOUNT', SQLROWCOUNT);
    EXCEPTION
      WHEN OTHER THEN
        STATUS_OBJECT := OBJECT_CONSTRUCT('SQLCODE', SQLCODE, 'SQLERRM', SQLERRM, 'SQLSTATE', SQLSTATE);
    END;
    --.LOGON
    !!!RESOLVE EWI!!! /*** SSC-EWI-0073 - PENDING FUNCTIONAL EQUIVALENCE REVIEW FOR 'BTLogOn' NODE ***/!!!
    null;
    /*** SSC-EWI-0001 - UNRECOGNIZED TOKEN ON LINE 4 COLUMN 8 OF THE SOURCE CODE STARTING AT '127.0'. EXPECTED 'STATEMENT' GRAMMAR. ***/
    /*--127.0.0.1/dbc,dbc*/
     
    BEGIN
      INSERT INTO TABLEB
      VALUES (1);
      STATUS_OBJECT := OBJECT_CONSTRUCT('SQLROWCOUNT', SQLROWCOUNT);
    EXCEPTION
      WHEN OTHER THEN
        STATUS_OBJECT := OBJECT_CONSTRUCT('SQLCODE', SQLCODE, 'SQLERRM', SQLERRM, 'SQLSTATE', SQLSTATE);
    END;
    IF (NOT (STATUS_OBJECT['SQLROWCOUNT'] = 0)) THEN
      !!!RESOLVE EWI!!! /*** SSC-EWI-TD0087 - GOTO SECTIONA WAS REMOVED DUE TO IF STATEMENT INVERSION ***/!!!
       
      IF (STATUS_OBJECT['SQLROWCOUNT'] >= 1) THEN
         
        /*.label SECTIONB*/
         
        --.REMARK 'Total Hours on Account'
        null;
        /*.label SECTIONC*/
         
        --.logoff
        null;
        RETURN 0;
      END IF;
    END IF;
    /*.label SECTIONA*/!!!RESOLVE EWI!!! /*** SSC-EWI-0002 - REMOVED NEXT STATEMENT, NOT APPLICABLE IN SNOWFLAKE.  ***/!!!
     
    --.REMARK 'Zero Hours on Account'
    !!!RESOLVE EWI!!! /*** SSC-EWI-0073 - PENDING FUNCTIONAL EQUIVALENCE REVIEW FOR 'Remark' NODE ***/!!!
    null;
     
    /*.label SECTIONC*/
     
    --.logoff
    null;
    RETURN 0;
    /*.label SECTIONB*/!!!RESOLVE EWI!!! /*** SSC-EWI-0002 - REMOVED NEXT STATEMENT, NOT APPLICABLE IN SNOWFLAKE.  ***/!!!
     
    --.REMARK 'Total Hours on Account'
    !!!RESOLVE EWI!!! /*** SSC-EWI-0073 - PENDING FUNCTIONAL EQUIVALENCE REVIEW FOR 'Remark' NODE ***/!!!
    null;
    /*.label SECTIONC*/!!!RESOLVE EWI!!! /*** SSC-EWI-0002 - REMOVED NEXT STATEMENT, NOT APPLICABLE IN SNOWFLAKE.  ***/!!!
     
    --.logoff
    !!!RESOLVE EWI!!! /*** SSC-EWI-0073 - PENDING FUNCTIONAL EQUIVALENCE REVIEW FOR 'LogOff' NODE ***/!!!
    null;
    RETURN 0;
  END
$$

Known Issues

No issues were found.

Related EWIS

1. SSC-EWI-0001: Unrecognized token on the line of the source code.

2. SSC-EWI-0002: Removed next statement, not applicable in SnowFlake.

3. SSC-EWI-0073: Pending Functional Equivalence Review

4. SSC-EWI-TD0087: GOTO statement was removed due to if statement inversion.