trait CreateTableWriter[T] extends WriteConfigMethods[CreateTableWriter[T]]
Trait to restrict calls to create and replace operations.
- Source
- DataFrameWriterV2.scala
- Since
3.0.0
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- CreateTableWriter
- WriteConfigMethods
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abstract
def
create(): Unit
Create a new table from the contents of the data frame.
Create a new table from the contents of the data frame.
The new table's schema, partition layout, properties, and other configuration will be based on the configuration set on this writer.
If the output table exists, this operation will fail with org.apache.spark.sql.catalyst.analysis.TableAlreadyExistsException.
- Annotations
- @throws( ... )
- Exceptions thrown
org.apache.spark.sql.catalyst.analysis.TableAlreadyExistsExceptionIf the table already exists
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abstract
def
createOrReplace(): Unit
Create a new table or replace an existing table with the contents of the data frame.
Create a new table or replace an existing table with the contents of the data frame.
The output table's schema, partition layout, properties, and other configuration will be based on the contents of the data frame and the configuration set on this writer. If the table exists, its configuration and data will be replaced.
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abstract
def
option(key: String, value: String): CreateTableWriter[T]
Add a write option.
Add a write option.
- Definition Classes
- WriteConfigMethods
- Since
3.0.0
-
abstract
def
options(options: Map[String, String]): CreateTableWriter[T]
Add write options from a Java Map.
Add write options from a Java Map.
- Definition Classes
- WriteConfigMethods
- Since
3.0.0
-
abstract
def
options(options: Map[String, String]): CreateTableWriter[T]
Add write options from a Scala Map.
Add write options from a Scala Map.
- Definition Classes
- WriteConfigMethods
- Since
3.0.0
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abstract
def
partitionedBy(column: Column, columns: Column*): CreateTableWriter[T]
Partition the output table created by
create,createOrReplace, orreplaceusing the given columns or transforms.Partition the output table created by
create,createOrReplace, orreplaceusing the given columns or transforms.When specified, the table data will be stored by these values for efficient reads.
For example, when a table is partitioned by day, it may be stored in a directory layout like:
table/day=2019-06-01/table/day=2019-06-02/
Partitioning is one of the most widely used techniques to optimize physical data layout. It provides a coarse-grained index for skipping unnecessary data reads when queries have predicates on the partitioned columns. In order for partitioning to work well, the number of distinct values in each column should typically be less than tens of thousands.
- Since
3.0.0
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abstract
def
replace(): Unit
Replace an existing table with the contents of the data frame.
Replace an existing table with the contents of the data frame.
The existing table's schema, partition layout, properties, and other configuration will be replaced with the contents of the data frame and the configuration set on this writer.
If the output table does not exist, this operation will fail with org.apache.spark.sql.catalyst.analysis.CannotReplaceMissingTableException.
- Annotations
- @throws( ... )
- Exceptions thrown
org.apache.spark.sql.catalyst.analysis.CannotReplaceMissingTableExceptionIf the table does not exist
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abstract
def
tableProperty(property: String, value: String): CreateTableWriter[T]
Add a table property.
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abstract
def
using(provider: String): CreateTableWriter[T]
Specifies a provider for the underlying output data source.
Specifies a provider for the underlying output data source. Spark's default catalog supports "parquet", "json", etc.
- Since
3.0.0
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def
option(key: String, value: Double): CreateTableWriter[T]
Add a double output option.
Add a double output option.
- Definition Classes
- WriteConfigMethods
- Since
3.0.0
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def
option(key: String, value: Long): CreateTableWriter[T]
Add a long output option.
Add a long output option.
- Definition Classes
- WriteConfigMethods
- Since
3.0.0
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def
option(key: String, value: Boolean): CreateTableWriter[T]
Add a boolean output option.
Add a boolean output option.
- Definition Classes
- WriteConfigMethods
- Since
3.0.0
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synchronized[T0](arg0: ⇒ T0): T0
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