Package org.apache.flink.table.operations

Class ShowFunctionsOperation

java.lang.Object

org.apache.flink.table.operations.AbstractShowOperation

org.apache.flink.table.operations.ShowFunctionsOperation

All Implemented Interfaces:

ExecutableOperation, Operation, ShowOperation

@Internal
public class ShowFunctionsOperation
extends AbstractShowOperation

Operation to describe a SHOW FUNCTIONS statement. The full syntax for SHOW FUNCTIONS is as followings:

 SHOW [USER] FUNCTIONS [ ( FROM | IN ) [catalog_name.]database_name ] [ [NOT] (LIKE | ILIKE)
 <sql_like_pattern> ] statement
 

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ShowFunctionsOperation.FunctionScope	Represent scope of function.

Nested classes/interfaces inherited from interface org.apache.flink.table.operations.ExecutableOperation

ExecutableOperation.Context

Field Summary

Fields inherited from class org.apache.flink.table.operations.AbstractShowOperation

catalogName, likeOp, preposition

Constructor Summary

Constructors

Constructor	Description
ShowFunctionsOperation(String catalogName, String databaseName)
ShowFunctionsOperation(ShowFunctionsOperation.FunctionScope functionScope, String preposition, String catalogName, String databaseName, ShowLikeOperator likeOp)
ShowFunctionsOperation(ShowFunctionsOperation.FunctionScope functionScope, String catalogName, String databaseName, ShowLikeOperator likeOp)

Method Summary

Modifier and Type	Method	Description
protected String	getColumnName()
protected String	getOperationName()
String	getPrepositionSummaryString()
protected Collection<String>	retrieveDataForTableResult(ExecutableOperation.Context ctx)

Methods inherited from class org.apache.flink.table.operations.AbstractShowOperation

asSummaryString, equals, execute, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ShowFunctionsOperation

public ShowFunctionsOperation(@Nullable
                              String catalogName,
                              @Nullable
                              String databaseName)

ShowFunctionsOperation

public ShowFunctionsOperation(ShowFunctionsOperation.FunctionScope functionScope,
                              @Nullable
                              String catalogName,
                              @Nullable
                              String databaseName,
                              @Nullable
                              ShowLikeOperator likeOp)

ShowFunctionsOperation

public ShowFunctionsOperation(ShowFunctionsOperation.FunctionScope functionScope,
                              @Nullable
                              String preposition,
                              @Nullable
                              String catalogName,
                              @Nullable
                              String databaseName,
                              @Nullable
                              ShowLikeOperator likeOp)

Method Detail

retrieveDataForTableResult

protected Collection<String> retrieveDataForTableResult(ExecutableOperation.Context ctx)

Specified by:

retrieveDataForTableResult in class AbstractShowOperation

getOperationName

protected String getOperationName()

Specified by:

getOperationName in class AbstractShowOperation

getColumnName

protected String getColumnName()

Specified by:

getColumnName in class AbstractShowOperation

getPrepositionSummaryString

public String getPrepositionSummaryString()

Overrides:

getPrepositionSummaryString in class AbstractShowOperation