TableOperations

All Known Implementing Classes:

BaseMetastoreTableOperations, HadoopTableOperations, HiveTableOperations, NessieTableOperations, StaticTableOperations
```
public interface TableOperations
```
SPI interface to abstract table metadata access and updates.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`void`	`commit(TableMetadata base, TableMetadata metadata)` Replace the base table metadata with a new version.
`TableMetadata`	`current()` Return the currently loaded table metadata, without checking for updates.
`default EncryptionManager`	`encryption()` Returns a `EncryptionManager` to encrypt and decrypt data files.
`FileIO`	`io()` Returns a `FileIO` to read and write table data and metadata files.
`LocationProvider`	`locationProvider()` Returns a `LocationProvider` that supplies locations for new new data files.
`java.lang.String`	`metadataFileLocation(java.lang.String fileName)` Given the name of a metadata file, obtain the full path of that file using an appropriate base location of the implementation's choosing.
`default long`	`newSnapshotId()` Create a new ID for a Snapshot
`TableMetadata`	`refresh()` Return the current table metadata after checking for updates.
`default TableOperations`	`temp(TableMetadata uncommittedMetadata)` Return a temporary `TableOperations` instance that uses configuration from uncommitted metadata.

- Method Detail
  - current
```
TableMetadata current()
```
    Return the currently loaded table metadata, without checking for updates.
    
    Returns:
    
    table metadata
  - refresh
```
TableMetadata refresh()
```
    Return the current table metadata after checking for updates.
    
    Returns:
    
    table metadata
  - commit
```
void commit(TableMetadata base,
            TableMetadata metadata)
```
    Replace the base table metadata with a new version.
    This method should implement and document atomicity guarantees.
    Implementations must check that the base metadata is current to avoid overwriting updates. Once the atomic commit operation succeeds, implementations must not perform any operations that may fail because failure in this method cannot be distinguished from commit failure.
    Implementations must throw a CommitStateUnknownException in cases where it cannot be determined if the commit succeeded or failed. For example if a network partition causes the confirmation of the commit to be lost, the implementation should throw a CommitStateUnknownException. This is important because downstream users of this API need to know whether they can clean up the commit or not, if the state is unknown then it is not safe to remove any files. All other exceptions will be treated as if the commit has failed.
    
    Parameters:
    
    base - table metadata on which changes were based
    
    metadata - new table metadata with updates
  - io
```
FileIO io()
```
    Returns a FileIO to read and write table data and metadata files.
  - encryption
```
default EncryptionManager encryption()
```
    Returns a EncryptionManager to encrypt and decrypt data files.
  - metadataFileLocation
```
java.lang.String metadataFileLocation(java.lang.String fileName)
```
    Given the name of a metadata file, obtain the full path of that file using an appropriate base location of the implementation's choosing.
    The file may not exist yet, in which case the path should be returned as if it were to be created by e.g. FileIO.newOutputFile(String).
  - locationProvider
```
LocationProvider locationProvider()
```
    Returns a LocationProvider that supplies locations for new new data files.
    
    Returns:
    
    a location provider configured for the current table state
  - temp
```
default TableOperations temp(TableMetadata uncommittedMetadata)
```
    Return a temporary TableOperations instance that uses configuration from uncommitted metadata.
    This is called by transactions when uncommitted table metadata should be used; for example, to create a metadata file location based on metadata in the transaction that has not been committed.
    Transactions will not call refresh() or commit(TableMetadata, TableMetadata).
    
    Parameters:
    
    uncommittedMetadata - uncommitted table metadata
    
    Returns:
    
    a temporary table operations that behaves like the uncommitted metadata is current
  - newSnapshotId
```
default long newSnapshotId()
```
    Create a new ID for a Snapshot
    
    Returns:
    
    a long snapshot ID

Interface TableOperations

Method Summary

Method Detail

current

refresh

commit

io

encryption

metadataFileLocation

locationProvider

temp

newSnapshotId