org.apache.calcite.sql

Class SqlAlienSystemTypeNameSpec

java.lang.Object

org.apache.calcite.sql.SqlTypeNameSpec

org.apache.calcite.sql.SqlBasicTypeNameSpec

org.apache.calcite.sql.SqlAlienSystemTypeNameSpec

public class SqlAlienSystemTypeNameSpec
extends SqlBasicTypeNameSpec

Represents a type name for an alien system. For example, UNSIGNED is a built-in type in MySQL which is synonym of INTEGER.

You can use this class to define a customized type name with specific alias, for example, in some systems, STRING is synonym of VARCHAR and BYTES is synonym of VARBINARY.

Internally we may use the SqlAlienSystemTypeNameSpec to unparse as the builtin data type name for some alien systems during rel-to-sql conversion.

Constructor Summary

Constructors

Constructor and Description
SqlAlienSystemTypeNameSpec(String typeAlias, SqlTypeName typeName, int precision, SqlParserPos pos) Creates a SqlAlienSystemTypeNameSpec instance.
SqlAlienSystemTypeNameSpec(String typeAlias, SqlTypeName typeName, SqlParserPos pos) Creates a SqlAlienSystemTypeNameSpec instance.

Method Summary

Modifier and Type	Method and Description
boolean	equalsDeep(SqlTypeNameSpec node, 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.SqlBasicTypeNameSpec

deriveType, getCharSetName, getPrecision, getScale

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

SqlAlienSystemTypeNameSpec

public SqlAlienSystemTypeNameSpec(String typeAlias,
                                  SqlTypeName typeName,
                                  SqlParserPos pos)

Creates a SqlAlienSystemTypeNameSpec instance.

Parameters:

typeAlias - Type alias of the alien system

typeName - Type name the typeAlias implies as the (standard) basic type name

pos - The parser position

SqlAlienSystemTypeNameSpec

public SqlAlienSystemTypeNameSpec(String typeAlias,
                                  SqlTypeName typeName,
                                  int precision,
                                  SqlParserPos pos)

Creates a SqlAlienSystemTypeNameSpec instance.

Parameters:

typeAlias - Type alias of the alien system

typeName - Type name the typeAlias implies as the (standard) basic type name

precision - Type Precision

pos - The parser position

Method Detail

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.

Overrides:

unparse in class SqlBasicTypeNameSpec

equalsDeep

public boolean equalsDeep(SqlTypeNameSpec node,
                          Litmus litmus)

Description copied from class: SqlTypeNameSpec

Returns whether this spec is structurally equivalent to another spec.

Overrides:

equalsDeep in class SqlBasicTypeNameSpec