Table catalog_tbl = this.getTableCatalog(TwitterConstants.TABLENAME_USER);
assert(catalog_tbl != null);
String sql = SQLUtil.getInsertSQL(catalog_tbl);
PreparedStatement userInsert = this.conn.prepareStatement(sql);
NameHistogram name_h = new NameHistogram();
FlatHistogram<Integer> name_len_rng = new FlatHistogram<Integer>(this.rng(), name_h);
int total = 0;
int batchSize = 0;