Hive Table

Reads and writes data Hive tables that are managed by the execution environment's Metadata catalog (Metastore).

note

Choose the provider as Hive on properties page.

Source

Source Parameters

Parameter	Description	Required	Default
Database name	Name of the database	True
Table name	Name of the table	True
Provider	Must be set to hive	True
Filter Predicate	Where clause to filter the table	False	(all records)

Source Example

Generated Code

Without filter predicate

Python

def Source(spark: SparkSession) -> DataFrame:
    return spark.read.table(f"test_db.test_table")

Scala

object Source {

  def apply(spark: SparkSession): DataFrame = {
    spark.read.table("test_db.test_table")
  }

}

With filter predicate

Python

def Source(spark: SparkSession) -> DataFrame:
    return spark.sql("SELECT * FROM test_db.test_table WHERE col > 10")

Scala

object Source {

  def apply(spark: SparkSession): DataFrame =
    spark.sql("SELECT * FROM test_db.test_table WHERE col > 10")

}

Target

Target Parameters

Parameter	Description	Required	Default
Database name	Name of the database	True
Table name	Name of the table	True
Custom file path	Use custom file path to store underlying files.	False
Provider	Must be set to hive	True
Write Mode	How to handle existing data. See the this table for a list of available options.	True	error
File Format	File format to use when saving data. See this table for supported formats.	True	parquet
Partition Columns	Columns to partition by	False	(empty)
Use insert into	If true, use .insertInto instead of .save when generating code.	False	false

Supported Write Modes

Write Mode	Description
overwrite	If data already exists, overwrite with the contents of the DataFrame.
append	If data already exists, append the contents of the DataFrame.
ignore	If data already exists, do nothing with the contents of the DataFrame. This is similar to a CREATE TABLE IF NOT EXISTS in SQL.
error	If data already exists, throw an exception.

Supported File formats

1. Parquet
2. Text file
3. Avro
4. ORC
5. RC file
6. Sequence file

Target Example

Generated Code

Python

def Target(spark: SparkSession, in0: DataFrame):
    in0.write\
        .format("hive")\
        .option("fileFormat", "parquet")\
        .mode("overwrite")\
        .saveAsTable("test_db.test_table")

Scala

object Target {

  def apply(spark: SparkSession, in: DataFrame): DataFrame = {
    in.write
        .format("hive")
        .option("fileFormat", "parquet")
        .mode("overwrite")
        .saveAsTable("test_db.test_table")
  }

}