code: private static String generateCrudMigrate(Table table, Column partitioncolumn, Constraint pkey) {
          final StringBuilder sb = new StringBuilder("MIGRATE FROM ").append(table.getTypeName());
          generateCrudPKeyWhereClause(partitioncolumn, pkey, sb);
          return sb.append(';').toString();
      }
docs: Create a statement like:
  "MIGRATE FROM <table> where {...}"
  @param table target table
  @param partitioncolumn partition column of a partitioned table, or null if table is replicated
  @param pkey primary key
  @return statement string