Package org.apache.flink.table.catalog

Interface TemporaryOperationListener

@PublicEvolving
public interface TemporaryOperationListener

This interface is for a Catalog to listen on temporary object operations. When a catalog implements this interface, it'll get informed when certain operations are performed on temporary objects belonging to that catalog.

Method Summary

Modifier and Type	Method	Description
CatalogFunction	onCreateTemporaryFunction(ObjectPath functionPath, CatalogFunction function)	This method is called when a temporary function is to be created in this catalog.
CatalogBaseTable	onCreateTemporaryTable(ObjectPath tablePath, CatalogBaseTable table)	This method is called when a temporary table or view is to be created in this catalog.
void	onDropTemporaryFunction(ObjectPath functionPath)	This method is called when a temporary function in this catalog is to be dropped.
void	onDropTemporaryTable(ObjectPath tablePath)	This method is called when a temporary table or view in this catalog is to be dropped.

Method Detail

onCreateTemporaryTable

CatalogBaseTable onCreateTemporaryTable(ObjectPath tablePath,
                                        CatalogBaseTable table)
                                 throws CatalogException

This method is called when a temporary table or view is to be created in this catalog. The catalog can modify the table or view according to its needs and return the modified CatalogBaseTable instance, which will be stored for the user session.

Parameters:

tablePath - path of the table or view to be created

table - the table definition

Returns:

the modified table definition to be stored

Throws:

CatalogException - in case of any runtime exception

onDropTemporaryTable

void onDropTemporaryTable(ObjectPath tablePath)
                   throws CatalogException

This method is called when a temporary table or view in this catalog is to be dropped.

Parameters:

tablePath - path of the table or view to be dropped

Throws:

CatalogException - in case of any runtime exception

onCreateTemporaryFunction

CatalogFunction onCreateTemporaryFunction(ObjectPath functionPath,
                                          CatalogFunction function)
                                   throws CatalogException

This method is called when a temporary function is to be created in this catalog. The catalog can modify the function according to its needs and return the modified CatalogFunction instance, which will be stored for the user session.

Parameters:

functionPath - path of the function to be created

function - the function definition

Returns:

the modified function definition to be stored

Throws:

CatalogException - in case of any runtime exception

onDropTemporaryFunction

void onDropTemporaryFunction(ObjectPath functionPath)
                      throws CatalogException

This method is called when a temporary function in this catalog is to be dropped.

Parameters:

functionPath - path of the function to be dropped

Throws:

CatalogException - in case of any runtime exception