[jira] [Created] (PHOENIX-1620) Add API for getting tenant ID from an HBase row of a Phoenix table

["James Taylor (JIRA)" <ji...@apache.org>]

James Taylor created PHOENIX-1620:
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             Summary: Add API for getting tenant ID from an HBase row of a Phoenix table
                 Key: PHOENIX-1620
                 URL: https://issues.apache.org/jira/browse/PHOENIX-1620
             Project: Phoenix
          Issue Type: Bug
            Reporter: James Taylor


Provide a means for HBase-level tools to get the tenant ID from an HBase row of any Phoenix table by adding the following method to PhoenixRuntime:

    public static Expression getTenantIdExpression(PhoenixConnection conn, String fullTableName);

Then you'd call this once to get back an Expression which could be used again and again to get the tenantId from a List<Cell>, like this:

    Tuple tuple = new MultiKeyValueTuple();
    ImmutableBytesWritable ptr = new ImmutableBytesWritable();
    Expression expression = PhoenixRuntime.getTenantIdExpression(conn, fullTableName);
    while (more rows) {
        List<Cell> cells = get cells from row
        tuple.setKeyValues(cells);
        expression.evaluate(tuple, ptr);
        // At this point ptr would point to the tenant ID with its offset and length
    }




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