Package org.apache.calcite.sql.util

Class ReflectiveSqlOperatorTable

java.lang.Object

org.apache.calcite.sql.util.ReflectiveSqlOperatorTable

All Implemented Interfaces:

SqlOperatorTable

Direct Known Subclasses:

OracleSqlOperatorTable, 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	Description
static final String	IS_NAME
protected com.google.common.collect.ImmutableMultimap<String,SqlOperator>	operators	Contains all (name, operator) pairs.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ReflectiveSqlOperatorTable()

Method Summary

Modifier and Type	Method	Description
protected static com.google.common.collect.ImmutableMultimap<String,SqlOperator>	buildIndex(Iterable<? extends SqlOperator> operators)	Derives a value to be assigned to operators from a given list of operators.
List<SqlOperator>	getOperatorList()	Retrieves a list of all functions and operators in this table.
final SqlOperatorTable	init()	Performs post-constructor initialization of an operator table.
void	lookupOperatorOverloads(SqlIdentifier opName, @Nullable SqlFunctionCategory category, SqlSyntax syntax, List<SqlOperator> operatorList, SqlNameMatcher nameMatcher)	Retrieves a list of operators with a given name and syntax.
protected void	lookUpOperators(String name, boolean caseSensitive, Consumer<SqlOperator> consumer)	Looks up operators, optionally matching case-sensitively.
void	register(SqlOperator op)	Deprecated. This table is designed to be initialized from the fields of a class, and adding operators is not efficient
protected void	setOperators(com.google.common.collect.Multimap<String,SqlOperator> operators)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.calcite.sql.SqlOperatorTable

getOperatorList

Field Details

IS_NAME

public static final String IS_NAME

See Also:

• Constant Field Values

operators

protected com.google.common.collect.ImmutableMultimap<String,SqlOperator> operators

Contains all (name, operator) pairs. Effectively a sorted immutable multimap.

There can be several operators with the same name (case-insensitive or case-sensitive) and these operators will lie in a contiguous range which we can find efficiently using binary search.

Constructor Details

ReflectiveSqlOperatorTable

protected ReflectiveSqlOperatorTable()

Method Details

init

public final SqlOperatorTable 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,
 @Nullable SqlFunctionCategory category,
 SqlSyntax syntax,
 List<SqlOperator> operatorList,
 SqlNameMatcher nameMatcher)

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

nameMatcher - Name matcher

register

@Deprecated
public void register(SqlOperator op)

Deprecated.

This table is designed to be initialized from the fields of a class, and adding operators is not efficient

Registers a function or operator in the table.

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. Depending on the table type, may or may not be mutable.

Specified by:

getOperatorList in interface SqlOperatorTable

Returns:

list of SqlOperator objects

setOperators

protected void setOperators(com.google.common.collect.Multimap<String,SqlOperator> operators)

buildIndex

protected static com.google.common.collect.ImmutableMultimap<String,SqlOperator> buildIndex(Iterable<? extends SqlOperator> operators)

Derives a value to be assigned to operators from a given list of operators.

lookUpOperators

protected void lookUpOperators(String name,
 boolean caseSensitive,
 Consumer<SqlOperator> consumer)

Looks up operators, optionally matching case-sensitively.