org.apache.calcite.sql

Class SqlRowTypeNameSpec

java.lang.Object

org.apache.calcite.sql.SqlTypeNameSpec

org.apache.calcite.sql.SqlRowTypeNameSpec

public class SqlRowTypeNameSpec
extends SqlTypeNameSpec

A sql type name specification of row type.

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

 <row type> ::=
   ROW <row type body>
 <row type body> ::=
   <left paren> <field definition>
   [ { <comma> <field definition> }... ]
   <right paren>

 <field definition> ::=
   <field name> <data type>
 

As a extended syntax to the standard SQL, each field type can have a [ NULL | NOT NULL ] suffix specification, i.e. Row(f0 int null, f1 varchar not null). The default is NOT NULL(not nullable).

Constructor Summary

Constructors

Constructor and Description
SqlRowTypeNameSpec(SqlParserPos pos, List<SqlIdentifier> fieldNames, List<SqlDataTypeSpec> fieldTypes) Creates a row type specification.

Method Summary

Modifier and Type	Method and Description
RelDataType	deriveType(SqlValidator sqlValidator) Derive type from this SqlTypeNameSpec.
boolean	equalsDeep(SqlTypeNameSpec node, Litmus litmus) Returns whether this spec is structurally equivalent to another spec.
int	getArity()
List<SqlIdentifier>	getFieldNames()
List<SqlDataTypeSpec>	getFieldTypes()
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 Detail

SqlRowTypeNameSpec

public SqlRowTypeNameSpec(SqlParserPos pos,
                          List<SqlIdentifier> fieldNames,
                          List<SqlDataTypeSpec> fieldTypes)

Creates a row type specification.

Parameters:

pos - The parser position

fieldNames - The field names

fieldTypes - The field data types

Method Detail

getFieldNames

public List<SqlIdentifier> getFieldNames()

getFieldTypes

public List<SqlDataTypeSpec> getFieldTypes()

getArity

public int getArity()

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 node,
                          Litmus litmus)

Description copied from class: SqlTypeNameSpec

Returns whether this spec is structurally equivalent to another spec.

Specified by:

equalsDeep in class SqlTypeNameSpec

deriveType

public RelDataType deriveType(SqlValidator sqlValidator)

Description copied from class: SqlTypeNameSpec

Derive type from this SqlTypeNameSpec.

Specified by:

deriveType in class SqlTypeNameSpec

Parameters:

sqlValidator - The sql validator

Returns:

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