How to save DataFrame directly to Hive

Question

Is it possible to save DataFrame in spark directly to Hive   I have tried with converting DataFrame to Rdd and then saving as a text file and then loading in hive  But I am wondering if I can directly save dataframe to hive

User · Answer

If you want to create a hive table which does not exist  from a dataframe  some times it fails to create with DataFrameWriter saveAsTable   StructType toDDL will helps in listing the columns as a string   val df        val schemaStr   df schema toDDL   This gives the columns  spark sql s quot  quot  quot create table hive table     schemaStr   quot  quot  quot      Now write the dataframe to the table df write saveAsTable  quot hive table quot    hive table will be created in default space since we did not provide any database at spark sql    stg hive table can be used to create hive table in stg database

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Here is PySpark version to create Hive table from parquet file  You may have generated Parquet files using inferred schema and now want to push definition to Hive metastore  You can also push definition to the system like AWS Glue or AWS Athena and not just to Hive metastore  Here I am using spark sql to push create permanent table        Location where my parquet files are present      df   spark read parquet  s3   my-location data        cols   df dtypes     buf          buf append  CREATE EXTERNAL TABLE test123         keyanddatatypes    df dtypes     sizeof   len df dtypes      print   size----------  sizeof      count 1      for eachvalue in keyanddatatypes          print count sizeof eachvalue         if count    sizeof              total   str eachvalue 0   str      str eachvalue 1           else              total   str eachvalue 0     str        str eachvalue 1     str              buf append total          count   count   1      buf append           buf append   STORED as parquet        buf append  LOCATION       buf append          buf append  s3   my-location data        buf append          buf append            partition by pt     tabledef      join buf       print  ---------print definition ---------      print tabledef        create a table using spark sql  Assuming you are using spark 2 1      spark sql tabledef

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In my case this works fine   from pyspark llap import HiveWarehouseSession hive   HiveWarehouseSession session spark  build   hive setDatabase  DatabaseName   df   spark read format  csv   option  Header  True  load   user csvlocation csv   df write format HiveWarehouseSession   HIVE WAREHOUSE CONNECTOR  option  table   lt tablename gt   save     Done    You can read the Data  let you give  as  Employee   hive executeQuery  select   from Employee   show     For more details use this URL  https   docs cloudera com HDPDocuments HDP3 HDP-3 1 5 integrating-hive content hive-read-write-operations html

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Use DataFrameWriter saveAsTable   df write saveAsTable       See Spark SQL and DataFrame Guide

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Saving to Hive is just a matter of using write   method of your SQLContext   df write saveAsTable tableName    See https   spark apache org docs 2 1 0 api java org apache spark sql DataFrameWriter html saveAsTable java lang String   From Spark 2 2  use DataSet instead DataFrame

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For Hive external tables I use this function in PySpark   def save table sparkSession  dataframe  database  table name  save format  PARQUET        print  Saving result in        format database  table name       output schema                  join          format x name lower    x dataType  for x in list dataframe schema               replace  StringType    STRING              replace  IntegerType    INT              replace  DateType    DATE              replace  LongType    INT              replace  TimestampType    INT              replace  BooleanType    BOOLEAN              replace  FloatType    FLOAT             replace  DoubleType   FLOAT       output schema   re sub r DecimalType    0-9    0-9         FLOAT   output schema       sparkSession sql  DROP TABLE IF EXISTS        format database  table name        query    CREATE EXTERNAL TABLE IF NOT EXISTS            STORED AS    LOCATION   user hive                    format database  table name  output schema  save format  database  table name      sparkSession sql query      dataframe write insertInto         format database  table name  overwrite   True

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I don t see df write saveAsTable      deprecated in Spark 2 0 documentation  It has worked for us on Amazon EMR  We were perfectly able to read data from S3 into a dataframe  process it  create a table from the result and read it with MicroStrategy  Vinays answer has also worked though

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you need to have create a HiveContext   import org apache spark sql hive HiveContext   HiveContext sqlContext   new org apache spark sql hive HiveContext sc sc       Then directly save dataframe or select the columns to store as hive table  df is dataframe   df write   mode  overwrite   saveAsTable  schemaName tableName      or  df select df col  col1   df col  col2    df col  col3     write   mode  overwrite   saveAsTable  schemaName tableName      or  df write   mode SaveMode Overwrite  saveAsTable  dbName tableName      SaveModes are Append Ignore Overwrite ErrorIfExists  I added here the definition for HiveContext from Spark Documentation    In addition to the basic SQLContext  you can also create a HiveContext  which provides a superset of the functionality provided by the basic SQLContext  Additional features include the ability to write queries using the more complete HiveQL parser  access to Hive UDFs  and the ability to read data from Hive tables  To use a HiveContext  you do not need to have an existing Hive setup  and all of the data sources available to a SQLContext are still available  HiveContext is only packaged separately to avoid including all of Hive   s dependencies in the default Spark build      on Spark version 1 6 2  using  dbName tableName  gives this error      org apache spark sql AnalysisException  Specifying database name or other qualifiers are not allowed for temporary tables  If the table name has dots     in it  please quote the table name with backticks

User · Answer

You could use Hortonworks spark-llap library like this import com hortonworks hwc HiveWarehouseSession  df write    format  quot com hortonworks spark sql hive llap HiveWarehouseConnector quot      mode  quot append quot      option  quot table quot    quot myDatabase myTable quot      save

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You can create an in-memory temporary table and store them in hive table using sqlContext    Lets say your data frame is myDf  You can create one temporary table using   myDf createOrReplaceTempView  mytempTable      Then you can use a simple hive statement to create table and dump the data from your temp table    sqlContext sql  create table mytable as select   from mytempTable

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Sorry writing late to the post but I see no accepted answer   df write   saveAsTable will throw AnalysisException and is not HIVE table compatible   Storing DF as df write   format  hive   should do the trick   However  if that doesn t work  then going by the previous comments and answers  this is what is the best solution in my opinion  Open to suggestions though    Best approach is to explicitly create HIVE table  including PARTITIONED table     def createHiveTable  Unit    spark sql  CREATE TABLE  hive table name  fields         PARTITIONED BY   partition column String  STORED AS  StorageType       save DF as temp table    df createOrReplaceTempView   tempTableName    and insert into PARTITIONED HIVE table   spark sql  insert into table default  hive table name PARTITION  partition column  select   from  tempTableName   spark sql  select   from default  hive table name   show 1000 false    Offcourse the LAST COLUMN in DF will be the PARTITION COLUMN so create HIVE table accordingly   Please comment if it works  or not     --UPDATE--  df write      partitionBy   partition column      format  hive      mode SaveMode append     saveAsTable  new table name to be created in hive     Table should not exist OR should be a PARTITIONED table in HIVE

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