public void addToDefaultConstraints(SQLDefaultConstraint elem) {
    if (this.defaultConstraints == null) {
      this.defaultConstraints = new java.util.ArrayList<SQLDefaultConstraint>();
    }
    this.defaultConstraints.add(elem);
  }
Returns true if field notNullConstraints is set (has been assigned a value) and false otherwise
standalone-metastore/metastore-common/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/metastore/api/SQLAllTableConstraints.java