Package org.apache.calcite.sql

Class SqlCollectionTypeNameSpec

java.lang.Object

org.apache.calcite.sql.SqlTypeNameSpec

org.apache.calcite.sql.SqlCollectionTypeNameSpec

public class SqlCollectionTypeNameSpec
extends SqlTypeNameSpec

A sql type name specification of collection type.

The grammar definition in SQL-2011 IWD 9075-2:201?(E) 6.1 <collection type> is as following:

 <collection type> ::=
     <array type>
   | <multiset type>

 <array type> ::=
   <data type> ARRAY
   [ <left bracket or trigraph>
     <maximum cardinality>
     <right bracket or trigraph> ]

 <maximum cardinality> ::=
   <unsigned integer>

 <multiset type> ::=
   <data type> MULTISET
 

This class is intended to describe SQL collection type. It can describe either simple collection type like "int array" or nested collection type like "int array array" or "int array multiset". For nested collection type, the element type name of this SqlCollectionTypeNameSpec is also a SqlCollectionTypeNameSpec.

Constructor Summary

Constructors

Constructor	Description
SqlCollectionTypeNameSpec(SqlTypeNameSpec elementTypeName, SqlTypeName collectionTypeName, SqlParserPos pos)	Creates a SqlCollectionTypeNameSpec.

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.
SqlTypeNameSpec	getElementTypeName()
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

SqlCollectionTypeNameSpec

public SqlCollectionTypeNameSpec(SqlTypeNameSpec elementTypeName,
 SqlTypeName collectionTypeName,
 SqlParserPos pos)

Creates a SqlCollectionTypeNameSpec.

Parameters:

elementTypeName - Type of the collection element

collectionTypeName - Collection type name

pos - Parser position, must not be null

Method Details

getElementTypeName

public SqlTypeNameSpec getElementTypeName()

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