Pyspark sparkSql问题

我使用的是cloudera 10.0，其spark版本为1.6。Pyspark sparkSql问题

我想下面的语句登录到控制台pyspark

sqlContext.sql("select * from /user/hive/warehouse/default.party").show()

我得到如下错误给后来从蜂巢数据。

Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
    File "/usr/lib/spark/python/pyspark/sql/context.py", line 580, in sql 
    return DataFrame(self._ssql_ctx.sql(sqlQuery), self) 
    File "/usr/lib/spark/python/lib/py4j-0.9-src.zip/py4j/java_gateway.py", line 813, in __call__ 
    File "/usr/lib/spark/python/pyspark/sql/utils.py", line 45, in deco 
    return f(*a, **kw) 
    File "/usr/lib/spark/python/lib/py4j-0.9-src.zip/py4j/protocol.py", line 308, in get_return_value 
py4j.protocol.Py4JJavaError: An error occurred while calling o18.sql. 
: java.lang.RuntimeException: [1.15] failure: ``('' expected but `/' found 


select * from /user/hive/warehouse/default.party 
      ^
    at scala.sys.package$.error(package.scala:27) 
    at org.apache.spark.sql.catalyst.AbstractSparkSQLParser.parse(AbstractSparkSQLParser.scala:36) 
    at org.apache.spark.sql.catalyst.DefaultParserDialect.parse(ParserDialect.scala:67) 
    at org.apache.spark.sql.SQLContext$$anonfun$2.apply(SQLContext.scala:211) 
    at org.apache.spark.sql.SQLContext$$anonfun$2.apply(SQLContext.scala:211) 
    at org.apache.spark.sql.execution.SparkSQLParser$$anonfun$org$apache$spark$sql$execution$SparkSQLParser$$others$1.apply(SparkSQLParser.scala:114) 
    at org.apache.spark.sql.execution.SparkSQLParser$$anonfun$org$apache$spark$sql$execution$SparkSQLParser$$others$1.apply(SparkSQLParser.scala:113) 
    at scala.util.parsing.combinator.Parsers$Success.map(Parsers.scala:136) 
    at scala.util.parsing.combinator.Parsers$Success.map(Parsers.scala:135) 
    at scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242) 
    at scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242) 
    at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222) 
    at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1$$anonfun$apply$2.apply(Parsers.scala:254) 
    at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1$$anonfun$apply$2.apply(Parsers.scala:254) 
    at scala.util.parsing.combinator.Parsers$Failure.append(Parsers.scala:202) 
    at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254) 
    at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254) 
    at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222) 
    at scala.util.parsing.combinator.Parsers$$anon$2$$anonfun$apply$14.apply(Parsers.scala:891) 
    at scala.util.parsing.combinator.Parsers$$anon$2$$anonfun$apply$14.apply(Parsers.scala:891) 
    at scala.util.DynamicVariable.withValue(DynamicVariable.scala:57) 
    at scala.util.parsing.combinator.Parsers$$anon$2.apply(Parsers.scala:890) 
    at scala.util.parsing.combinator.PackratParsers$$anon$1.apply(PackratParsers.scala:110) 
    at org.apache.spark.sql.catalyst.AbstractSparkSQLParser.parse(AbstractSparkSQLParser.scala:34) 
    at org.apache.spark.sql.SQLContext$$anonfun$1.apply(SQLContext.scala:208) 
    at org.apache.spark.sql.SQLContext$$anonfun$1.apply(SQLContext.scala:208) 
    at org.apache.spark.sql.execution.datasources.DDLParser.parse(DDLParser.scala:43) 
    at org.apache.spark.sql.SQLContext.parseSql(SQLContext.scala:231) 
    at org.apache.spark.sql.SQLContext.sql(SQLContext.scala:817) 
    at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:231) 
    at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:381) 
    at py4j.Gateway.invoke(Gateway.java:259) 
    at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:133) 
    at py4j.commands.CallCommand.execute(CallCommand.java:79) 
    at py4j.GatewayConnection.run(GatewayConnection.java:209) 
    at java.lang.Thread.run(Thread.java:745)

请帮我解决这个障碍

来源

2017-07-03 Naveen Srikanth

您需要创建一个'HiveContext'，然后使用表名而不是表路径访问表。像'SELECT * from default.party'。 – philantrovert

嗨Philantrovert，谢谢你的回复。执行命令 party = sqlContext.table（“default.party”）后出现错误：错误：表未找到。但表格存在于配置单元默认数据库中 –

为了查询蜂巢表你就需要先注册为临时表。

from pyspark.sql import HiveContext 
sqlContext = HiveContext(sc) 
party = sqlContext.table("default.party") 
party.registerTempTable("party_temp_in_spark") 
sqlContext.sql("select * from party_temp_in_spark").show()

希望它有帮助！

来源

2017-07-03 07:40:47 Prem

Pyspark sparkSql问题

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