org.apache.hudi.internal.schema

Class InternalSchema

java.lang.Object

org.apache.hudi.internal.schema.InternalSchema

All Implemented Interfaces:

Serializable

public class InternalSchema
extends Object
implements Serializable

Internal schema for hudi table. used to support schema evolution.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
InternalSchema(List<Types.Field> columns)
InternalSchema(long versionId, int maxColumnId, List<Types.Field> cols)
InternalSchema(long versionId, int maxColumnId, Types.Field... cols)
InternalSchema(long versionId, List<Types.Field> cols)
InternalSchema(Types.Field... columns)

Method Summary

Modifier and Type	Method and Description
List<Types.Field>	columns() Returns a List of the columns in this Schema.
boolean	equals(Object o)
boolean	findDuplicateCol(String colName) Whether colName exists in current Schema.
Types.Field	findField(int id) Returns the sub-field identified by the field id.
Types.Field	findField(String name) Returns a sub-field by name as a Types.Field.
String	findfullName(int id) Returns the Type of a sub-field identified by the field name.
int	findIdByName(String name)
Type	findType(int id) Returns the Type of a sub-field identified by the field id.
Type	findType(String name) Returns the Type of a sub-field identified by the field name.
List<String>	getAllColsFullName() Get all columns full name.
Set<Integer>	getAllIds() Returns all field ids
static InternalSchema	getEmptyInternalSchema()
int	getMaxColumnId() Returns the max column id for this schema.
Types.RecordType	getRecord()
int	hashCode()
boolean	isEmptySchema()
long	schemaId() Returns the version ID for this schema.
void	setMaxColumnId(int maxColumnId) Set the version ID for this schema.
InternalSchema	setSchemaId(long versionId) Set the version ID for this schema.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

InternalSchema

public InternalSchema(List<Types.Field> columns)

InternalSchema

public InternalSchema(Types.Field... columns)

InternalSchema

public InternalSchema(long versionId,
                      List<Types.Field> cols)

InternalSchema

public InternalSchema(long versionId,
                      int maxColumnId,
                      List<Types.Field> cols)

InternalSchema

public InternalSchema(long versionId,
                      int maxColumnId,
                      Types.Field... cols)

Method Detail

getEmptyInternalSchema

public static InternalSchema getEmptyInternalSchema()

isEmptySchema

public boolean isEmptySchema()

getRecord

public Types.RecordType getRecord()

getAllColsFullName

public List<String> getAllColsFullName()

Get all columns full name.

setSchemaId

public InternalSchema setSchemaId(long versionId)

Set the version ID for this schema.

schemaId

public long schemaId()

Returns the version ID for this schema.

setMaxColumnId

public void setMaxColumnId(int maxColumnId)

Set the version ID for this schema.

getMaxColumnId

public int getMaxColumnId()

Returns the max column id for this schema.

columns

public List<Types.Field> columns()

Returns a List of the columns in this Schema.

findfullName

public String findfullName(int id)

Returns the Type of a sub-field identified by the field name.

Parameters:

id - a field id

Returns:

fullName of field of

findType

public Type findType(String name)

Returns the Type of a sub-field identified by the field name.

Parameters:

name - a field name

Returns:

a Type for the sub-field or null if it is not found

findType

public Type findType(int id)

Returns the Type of a sub-field identified by the field id.

Parameters:

id - a field id

Returns:

a Type for the sub-field or null if it is not found

getAllIds

public Set<Integer> getAllIds()

Returns all field ids

findField

public Types.Field findField(int id)

Returns the sub-field identified by the field id.

Parameters:

id - a field id

Returns:

the sub-field or null if it is not found

findField

public Types.Field findField(String name)

Returns a sub-field by name as a Types.Field. The result may be a top-level or a nested field.

Parameters:

name - a String name

Returns:

a Type for the sub-field or null if it is not found

findDuplicateCol

public boolean findDuplicateCol(String colName)

Whether colName exists in current Schema. Case insensitive.

Parameters:

colName - a colName

Returns:

Whether colName exists in current Schema

findIdByName

public int findIdByName(String name)

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object