org.apache.calcite.sql.util

Class ReflectiveSqlOperatorTable

java.lang.Object

org.apache.calcite.sql.util.ReflectiveSqlOperatorTable

All Implemented Interfaces:

SqlOperatorTable

Direct Known Subclasses:

SqlStdOperatorTable

public abstract class ReflectiveSqlOperatorTable
extends Object
implements SqlOperatorTable

ReflectiveSqlOperatorTable implements the SqlOperatorTable interface by reflecting the public fields of a subclass.

Field Summary

Fields

Modifier and Type	Field and Description
static String	IS_NAME

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ReflectiveSqlOperatorTable()

Method Summary

Methods

Modifier and Type	Method and Description
List<SqlOperator>	getOperatorList() Retrieves a list of all functions and operators in this table.
void	init() Performs post-constructor initialization of an operator table.
void	lookupOperatorOverloads(SqlIdentifier opName, SqlFunctionCategory category, SqlSyntax syntax, List<SqlOperator> operatorList) Retrieves a list of operators with a given name and syntax.
void	register(SqlFunction function) Registers a function in the table.
void	register(SqlOperator op)

Methods inherited from class java.lang.Object

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

Field Detail

IS_NAME

public static final String IS_NAME

See Also:

Constant Field Values

Constructor Detail

ReflectiveSqlOperatorTable

protected ReflectiveSqlOperatorTable()

Method Detail

init

public final void init()

Performs post-constructor initialization of an operator table. It can't be part of the constructor, because the subclass constructor needs to complete first.

lookupOperatorOverloads

public void lookupOperatorOverloads(SqlIdentifier opName,
                           SqlFunctionCategory category,
                           SqlSyntax syntax,
                           List<SqlOperator> operatorList)

Description copied from interface: SqlOperatorTable

Retrieves a list of operators with a given name and syntax. For example, by passing SqlSyntax.Function, the returned list is narrowed to only matching SqlFunction objects.

Specified by:

lookupOperatorOverloads in interface SqlOperatorTable

Parameters:

opName - name of operator

category - function category to look up, or null for any matching operator

syntax - syntax type of operator

operatorList - mutable list to which to append matches

register

public void register(SqlOperator op)

register

public void register(SqlFunction function)

Registers a function in the table.

Parameters:

function - Function to register

getOperatorList

public List<SqlOperator> getOperatorList()

Description copied from interface: SqlOperatorTable

Retrieves a list of all functions and operators in this table. Used for automated testing.

Specified by:

getOperatorList in interface SqlOperatorTable

Returns:

list of SqlOperator objects