code: private void alterColumnType(TableInfo tableInfo, CQLTranslator translator, ColumnInfo column) throws Exception
      {
          StringBuilder alterColumnTypeQuery = new StringBuilder("ALTER TABLE ");
          translator.ensureCase(alterColumnTypeQuery, tableInfo.getTableName(), false);
          alterColumnTypeQuery.append(" ALTER ");
          translator.ensureCase(alterColumnTypeQuery, column.getColumnName(), false);
          alterColumnTypeQuery.append(" TYPE "
                  + translator.getCQLType(CassandraValidationClassMapper.getValidationClass(column.getType(),
                          isCql3Enabled(tableInfo))));
          cassandra_client.execute_cql3_query(ByteBuffer.wrap(alterColumnTypeQuery.toString().getBytes()),
                  Compression.NONE, ConsistencyLevel.ONE);
  
          KunderaCoreUtils.printQuery(alterColumnTypeQuery.toString(), showQuery);
      }
docs: showSchema Alters column type of an existing column.
  
  @param tableInfo
  the table info
  @param translator
  the translator
  @param column
  the column
  @throws Exception
  the exception