小编Man*_*dar的帖子

我正在尝试使用freetts运行程序.我能够编译程序但是我无法使用kevin或mbrola语音我最后得到了输出消息

系统属性"mbrola.base"未定义.不会使用MBROLA的声音.
LINE UNAVAILABLE:格式为pcm_signed 16000.0 Hz 16位1通道大端

import javax.speech.*;
import javax.speech.synthesis.*;
import java.util.*;

class freetts {

    public static void main(String[] args) {
        try{ 
            Calendar calendar = new GregorianCalendar();
            String sayTime = "It is " + calendar.get(Calendar.HOUR) + " " + calendar.get(Calendar.MINUTE) + " " + (calendar.get(Calendar.AM_PM)==0 ? "AM":"PM");
            Synthesizer synth = Central.createSynthesizer(null);
            synth.allocate();
            synth.resume();
            synth.speakPlainText(sayTime, null);
            synth.waitEngineState(Synthesizer.QUEUE_EMPTY);
            synth.deallocate();
        }
        catch(Exception e){
            e.printStackTrace();
        }
    }
}

我知道这是可能的模型导出为PMML用Spark-MLlib,但怎么样Spark-ML？

是否有可能转换LinearRegressionModel从org.apache.spark.ml.regression到LinearRegressionModel从org.apache.spark.mllib.regression到能够调用的toPMML()方法？

I am working with Impala and fetching the list of tables from the database with some pattern like below.

Assume i have a Database bank, and tables under this database are like below.

cust_profile
cust_quarter1_transaction
cust_quarter2_transaction
product_cust_xyz
....
....
etc

Now i am filtering like

show tables in bank like '*cust*'

It is returning the expected results like, which are the tables has a word cust in its name.

现在我的要求是我想要名称中包含的所有表，cust而表中不应包含quarter2.

有人可以帮助我如何解决这个问题。

我在Oracle DB 中使用了一个查询来生成数据库中的表列表及其所有者和各自的表大小。这是我分享的示例查询。

select owner, table_name, round((num_rows*avg_row_len)/(1024*1024)) MB 
from all_tables 
where owner not like 'SYS%'  -- Exclude system tables.
and num_rows > 0  -- Ignore empty Tables.
order by MB desc -- Biggest first.

我想要来自 Impala/Hive 的类似输出。

注意：我试过show table stats <table_name>这将显示单个表的统计信息。但我想一次性获得所有表格统计信息。有人可以帮助我吗。