org.apache.calcite.sql.util

Class ChainedSqlOperatorTable

java.lang.Object

org.apache.calcite.sql.util.ChainedSqlOperatorTable

All Implemented Interfaces:

SqlOperatorTable

public class ChainedSqlOperatorTable
extends Object
implements SqlOperatorTable

ChainedSqlOperatorTable implements the SqlOperatorTable interface by chaining together any number of underlying operator table instances.

Field Summary

Fields

Modifier and Type	Field and Description
protected List<SqlOperatorTable>	tableList

Constructor Summary

Constructors

Constructor and Description
ChainedSqlOperatorTable(List<SqlOperatorTable> tableList) Creates a table based on a given list.

Method Summary

Methods

Modifier and Type	Method and Description
void	add(SqlOperatorTable table) Adds an underlying table.
List<SqlOperator>	getOperatorList() Retrieves a list of all functions and operators in this table.
void	lookupOperatorOverloads(SqlIdentifier opName, SqlFunctionCategory category, SqlSyntax syntax, List<SqlOperator> operatorList) Retrieves a list of operators with a given name and syntax.

Methods inherited from class java.lang.Object

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

Field Detail

tableList

protected final List<SqlOperatorTable> tableList

Constructor Detail

ChainedSqlOperatorTable

public ChainedSqlOperatorTable(List<SqlOperatorTable> tableList)

Creates a table based on a given list.

Method Detail

add

public void add(SqlOperatorTable table)

Adds an underlying table. The order in which tables are added is significant; tables added earlier have higher lookup precedence. A table is not added if it is already on the list.

Parameters:

table - table to add

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

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