org.apache.iceberg.spark

Class RollbackStagedTable

java.lang.Object

org.apache.iceberg.spark.RollbackStagedTable

All Implemented Interfaces:

org.apache.spark.sql.connector.catalog.StagedTable, org.apache.spark.sql.connector.catalog.SupportsDelete, org.apache.spark.sql.connector.catalog.SupportsRead, org.apache.spark.sql.connector.catalog.SupportsWrite, org.apache.spark.sql.connector.catalog.Table

public class RollbackStagedTable
extends java.lang.Object
implements org.apache.spark.sql.connector.catalog.StagedTable, org.apache.spark.sql.connector.catalog.SupportsRead, org.apache.spark.sql.connector.catalog.SupportsWrite, org.apache.spark.sql.connector.catalog.SupportsDelete

An implementation of StagedTable that mimics the behavior of Spark's non-atomic CTAS and RTAS.

A Spark catalog can implement StagingTableCatalog to support atomic operations by producing StagedTable. But if a catalog implements StagingTableCatalog, Spark expects the catalog to be able to produce a StagedTable for any table loaded by the catalog. This assumption doesn't always work, as in the case of SparkSessionCatalog, which supports atomic operations can produce a StagedTable for Iceberg tables, but wraps the session catalog and cannot necessarily produce a working StagedTable implementation for tables that it loads.

The work-around is this class, which implements the StagedTable interface but does not have atomic behavior. Instead, the StagedTable interface is used to implement the behavior of the non-atomic SQL plans that will create a table, write, and will drop the table to roll back.

This StagedTable implements SupportsRead, SupportsWrite, and SupportsDelete by passing the calls to the real table. Implementing those interfaces is safe because Spark will not use them unless the table supports them and returns the corresponding capabilities from capabilities().

Constructor Summary

Constructors

Constructor and Description
RollbackStagedTable(org.apache.spark.sql.connector.catalog.TableCatalog catalog, org.apache.spark.sql.connector.catalog.Identifier ident, org.apache.spark.sql.connector.catalog.Table table)

Method Summary

Modifier and Type	Method and Description
void	abortStagedChanges()
java.util.Set<org.apache.spark.sql.connector.catalog.TableCapability>	capabilities()
void	commitStagedChanges()
void	deleteWhere(org.apache.spark.sql.sources.Filter[] filters)
java.lang.String	name()
org.apache.spark.sql.connector.read.ScanBuilder	newScanBuilder(org.apache.spark.sql.util.CaseInsensitiveStringMap options)
org.apache.spark.sql.connector.write.WriteBuilder	newWriteBuilder(org.apache.spark.sql.connector.write.LogicalWriteInfo info)
org.apache.spark.sql.connector.expressions.Transform[]	partitioning()
java.util.Map<java.lang.String,java.lang.String>	properties()
org.apache.spark.sql.types.StructType	schema()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RollbackStagedTable

public RollbackStagedTable(org.apache.spark.sql.connector.catalog.TableCatalog catalog,
                           org.apache.spark.sql.connector.catalog.Identifier ident,
                           org.apache.spark.sql.connector.catalog.Table table)

Method Detail

commitStagedChanges

public void commitStagedChanges()

Specified by:

commitStagedChanges in interface org.apache.spark.sql.connector.catalog.StagedTable

abortStagedChanges

public void abortStagedChanges()

Specified by:

abortStagedChanges in interface org.apache.spark.sql.connector.catalog.StagedTable

name

public java.lang.String name()

Specified by:

name in interface org.apache.spark.sql.connector.catalog.Table

schema

public org.apache.spark.sql.types.StructType schema()

Specified by:

schema in interface org.apache.spark.sql.connector.catalog.Table

partitioning

public org.apache.spark.sql.connector.expressions.Transform[] partitioning()

Specified by:

partitioning in interface org.apache.spark.sql.connector.catalog.Table

properties

public java.util.Map<java.lang.String,java.lang.String> properties()

Specified by:

properties in interface org.apache.spark.sql.connector.catalog.Table

capabilities

public java.util.Set<org.apache.spark.sql.connector.catalog.TableCapability> capabilities()

Specified by:

capabilities in interface org.apache.spark.sql.connector.catalog.Table

deleteWhere

public void deleteWhere(org.apache.spark.sql.sources.Filter[] filters)

Specified by:

deleteWhere in interface org.apache.spark.sql.connector.catalog.SupportsDelete

newScanBuilder

public org.apache.spark.sql.connector.read.ScanBuilder newScanBuilder(org.apache.spark.sql.util.CaseInsensitiveStringMap options)

Specified by:

newScanBuilder in interface org.apache.spark.sql.connector.catalog.SupportsRead

newWriteBuilder

public org.apache.spark.sql.connector.write.WriteBuilder newWriteBuilder(org.apache.spark.sql.connector.write.LogicalWriteInfo info)

Specified by:

newWriteBuilder in interface org.apache.spark.sql.connector.catalog.SupportsWrite