Package org.apache.calcite.sql

Class SqlTypeNameSpec

java.lang.Object

org.apache.calcite.sql.SqlTypeNameSpec

Direct Known Subclasses:

SqlBasicTypeNameSpec, SqlCollectionTypeNameSpec, SqlMapTypeNameSpec, SqlRowTypeNameSpec, SqlUserDefinedTypeNameSpec

public abstract class SqlTypeNameSpec
extends Object

A SqlTypeNameSpec is a type name specification that allows user to customize sql node unparsing and data type deriving.

To customize sql node unparsing, override the method unparse(SqlWriter, int, int).

To customize data type deriving, override the method deriveType(SqlValidator).

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SqlTypeNameSpec(SqlIdentifier name, SqlParserPos pos)	Creates a SqlTypeNameSpec.

Method Summary

Modifier and Type	Method	Description
abstract RelDataType	deriveType(SqlValidator validator)	Derive type from this SqlTypeNameSpec.
abstract boolean	equalsDeep(SqlTypeNameSpec spec, Litmus litmus)	Returns whether this spec is structurally equivalent to another spec.
SqlParserPos	getParserPos()
SqlIdentifier	getTypeName()
abstract void	unparse(SqlWriter writer, int leftPrec, int rightPrec)	Writes a SQL representation of this spec to a writer.

Methods inherited from class java.lang.Object

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

Constructor Details

SqlTypeNameSpec

protected SqlTypeNameSpec(SqlIdentifier name,
 SqlParserPos pos)

Creates a SqlTypeNameSpec.

Parameters:

name - Name of the type

pos - Parser position, must not be null

Method Details

deriveType

public abstract RelDataType deriveType(SqlValidator validator)

Derive type from this SqlTypeNameSpec.

Parameters:

validator - The sql validator

Returns:

the RelDataType instance, throws exception if we could not deduce the type

unparse

public abstract void unparse(SqlWriter writer,
 int leftPrec,
 int rightPrec)

Writes a SQL representation of this spec to a writer.

equalsDeep

public abstract boolean equalsDeep(SqlTypeNameSpec spec,
 Litmus litmus)

Returns whether this spec is structurally equivalent to another spec.

getParserPos

public SqlParserPos getParserPos()

getTypeName

public SqlIdentifier getTypeName()