Package org.apache.calcite.sql

Class SqlUserDefinedTypeNameSpec

java.lang.Object

org.apache.calcite.sql.SqlTypeNameSpec

org.apache.calcite.sql.SqlUserDefinedTypeNameSpec

public class SqlUserDefinedTypeNameSpec
extends SqlTypeNameSpec

A sql type name specification of user defined type.

Usually you should register the UDT into the CalciteSchema first before referencing it in the sql statement.

Constructor Summary

Constructors

Constructor	Description
SqlUserDefinedTypeNameSpec(String name, SqlParserPos pos)
SqlUserDefinedTypeNameSpec(SqlIdentifier typeName, SqlParserPos pos)	Create a SqlUserDefinedTypeNameSpec instance.

Method Summary

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

Methods inherited from class org.apache.calcite.sql.SqlTypeNameSpec

getParserPos, getTypeName

Methods inherited from class java.lang.Object

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

Constructor Details

SqlUserDefinedTypeNameSpec

public SqlUserDefinedTypeNameSpec(SqlIdentifier typeName,
 SqlParserPos pos)

Create a SqlUserDefinedTypeNameSpec instance.

Parameters:

typeName - Type name as SQL identifier

pos - The parser position

SqlUserDefinedTypeNameSpec

public SqlUserDefinedTypeNameSpec(String name,
 SqlParserPos pos)

Method Details

deriveType

public RelDataType deriveType(SqlValidator validator)

Description copied from class: SqlTypeNameSpec

Derive type from this SqlTypeNameSpec.

Specified by:

deriveType in class SqlTypeNameSpec

Parameters:

validator - The sql validator

Returns:

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

unparse

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

Description copied from class: SqlTypeNameSpec

Writes a SQL representation of this spec to a writer.

Specified by:

unparse in class SqlTypeNameSpec

equalsDeep

public boolean equalsDeep(SqlTypeNameSpec spec,
 Litmus litmus)

Description copied from class: SqlTypeNameSpec

Returns whether this spec is structurally equivalent to another spec.

Specified by:

equalsDeep in class SqlTypeNameSpec