org.apache.hudi.internal.schema.action

Class InternalSchemaChangeApplier

java.lang.Object

org.apache.hudi.internal.schema.action.InternalSchemaChangeApplier

public class InternalSchemaChangeApplier
extends Object

Manage schema change for HoodieWriteClient.

Constructor Summary

Constructors

Constructor and Description
InternalSchemaChangeApplier(InternalSchema latestSchema)

Method Summary

Modifier and Type	Method and Description
InternalSchema	applyAddChange(String colName, Type colType, String doc, String position, TableChange.ColumnPositionChange.ColumnPositionType positionType) Add columns to table.
InternalSchema	applyColumnCommentChange(String colName, String doc) Update col comment for hudi table.
InternalSchema	applyColumnNullabilityChange(String colName, boolean nullable) Update col nullability for hudi table.
InternalSchema	applyColumnTypeChange(String colName, Type newType) Update col type for hudi table.
InternalSchema	applyDeleteChange(String... colNames) Delete columns to table.
InternalSchema	applyRenameChange(String colName, String newName) Rename col name for hudi table.
InternalSchema	applyReOrderColPositionChange(String colName, String referColName, TableChange.ColumnPositionChange.ColumnPositionType positionType) Reorder the position of col.

Methods inherited from class java.lang.Object

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

Constructor Detail

InternalSchemaChangeApplier

public InternalSchemaChangeApplier(InternalSchema latestSchema)

Method Detail

applyAddChange

public InternalSchema applyAddChange(String colName,
                                     Type colType,
                                     String doc,
                                     String position,
                                     TableChange.ColumnPositionChange.ColumnPositionType positionType)

Add columns to table.

Parameters:

colName - col name to be added. if we want to add col to a nested filed, the fullName should be specify

colType - col type to be added.

doc - col doc to be added.

position - col position to be added

positionType - col position change type. now support three change types: first/after/before

applyDeleteChange

public InternalSchema applyDeleteChange(String... colNames)

Delete columns to table.

Parameters:

colNames - col name to be deleted. if we want to delete col from a nested filed, the fullName should be specify

applyRenameChange

public InternalSchema applyRenameChange(String colName,
                                        String newName)

Rename col name for hudi table.

Parameters:

colName - col name to be renamed. if we want to rename col from a nested filed, the fullName should be specify

newName - new name for current col. no need to specify fullName.

applyColumnNullabilityChange

public InternalSchema applyColumnNullabilityChange(String colName,
                                                   boolean nullable)

Update col nullability for hudi table.

Parameters:

colName - col name to be changed. if we want to change col from a nested filed, the fullName should be specify

nullable - .

applyColumnTypeChange

public InternalSchema applyColumnTypeChange(String colName,
                                            Type newType)

Update col type for hudi table.

Parameters:

colName - col name to be changed. if we want to change col from a nested filed, the fullName should be specify

newType - .

applyColumnCommentChange

public InternalSchema applyColumnCommentChange(String colName,
                                               String doc)

Update col comment for hudi table.

Parameters:

colName - col name to be changed. if we want to change col from a nested filed, the fullName should be specify

doc - .

applyReOrderColPositionChange

public InternalSchema applyReOrderColPositionChange(String colName,
                                                    String referColName,
                                                    TableChange.ColumnPositionChange.ColumnPositionType positionType)

Reorder the position of col.

Parameters:

colName - column which need to be reordered. if we want to change col from a nested filed, the fullName should be specify.

referColName - reference position.

positionType - col position change type. now support three change types: first/after/before