Package liquibase.change.core

Class MergeColumnChange

java.lang.Object

liquibase.AbstractExtensibleObject

liquibase.plugin.AbstractPlugin

liquibase.change.AbstractChange

liquibase.change.core.MergeColumnChange

All Implemented Interfaces:

Cloneable, Change, ExtensibleObject, Plugin, LiquibaseSerializable

public class MergeColumnChange
extends AbstractChange

Combines data from two existing columns into a new column and drops the original columns.

Nested Class Summary

Nested classes/interfaces inherited from interface liquibase.serializer.LiquibaseSerializable

LiquibaseSerializable.SerializationType

Field Summary

Fields inherited from class liquibase.change.AbstractChange

NODENAME_COLUMN

Fields inherited from interface liquibase.change.Change

EMPTY_CHANGE, SHOULD_EXECUTE

Fields inherited from interface liquibase.serializer.LiquibaseSerializable

GENERIC_CHANGELOG_EXTENSION_NAMESPACE, GENERIC_SNAPSHOT_EXTENSION_NAMESPACE, STANDARD_CHANGELOG_NAMESPACE, STANDARD_SNAPSHOT_NAMESPACE

Fields inherited from interface liquibase.plugin.Plugin

PRIORITY_DATABASE, PRIORITY_DEFAULT, PRIORITY_NOT_APPLICABLE, PRIORITY_SPECIALIZED

Constructor Summary

Constructors

Constructor	Description
MergeColumnChange()

Method Summary

Modifier and Type	Method	Description
SqlStatement[]	generateStatements(Database database)	Generates the SqlStatement objects required to run the change for the given database.
boolean	generateStatementsVolatile(Database database)	Implementation delegates logic to the SqlGenerator.generateStatementsIsVolatile(Database) method on the SqlStatement objects returned by Change.generateStatements(liquibase.database.Database).
String	getCatalogName()
String	getColumn1Name()
String	getColumn2Name()
String	getConfirmationMessage()	Confirmation message to be displayed after the change is executed.
String	getFinalColumnName()
String	getFinalColumnType()
String	getJoinString()
String	getSchemaName()
String	getSerializedObjectNamespace()
String	getTableName()
boolean	supports(Database database)	Implementation delegates logic to the SqlGenerator.supports(liquibase.statement.SqlStatement, liquibase.database.Database) method on the SqlStatement objects returned by Change.generateStatements(liquibase.database.Database).

Methods inherited from class liquibase.change.AbstractChange

checkStatus, createAlternateParameterNames, createChangeMetaData, createChangeParameterMetadata, createDescriptionMetaData, createEmptyColumnConfig, createExampleValueMetaData, createInverses, createMustEqualExistingMetaData, createRequiredDatabasesMetaData, createSerializationTypeMetaData, createSinceMetaData, createSupportedDatabasesMetaData, customLoadLogic, equals, finishInitialization, generateCheckSum, generateRollbackStatements, generateRollbackStatementsVolatile, getAffectedDatabaseObjects, getChangeSet, getDescription, getExcludedFieldFilters, getResourceAccessor, getSerializableFieldNamespace, getSerializableFields, getSerializableFieldType, getSerializableFieldValue, getSerializedObjectName, hashCode, isInvalidProperty, load, modify, serialize, serializeValue, setChangeSet, setResourceAccessor, shouldExecuteChange, supportsRollback, toString, validate, warn

Methods inherited from class liquibase.AbstractExtensibleObject

clone, describe, get, get, get, getAttributes, getFieldValue, getObjectMetaData, getValuePath, has, set

Methods inherited from class java.lang.Object

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

Methods inherited from interface liquibase.ExtensibleObject

clone, describe, get, get, getAttributes, getObjectMetaData, getValuePath, has, set

Constructor Details

MergeColumnChange

public MergeColumnChange()

Method Details

supports

public boolean supports(Database database)

Description copied from class: AbstractChange

Implementation delegates logic to the SqlGenerator.supports(liquibase.statement.SqlStatement, liquibase.database.Database) method on the SqlStatement objects returned by Change.generateStatements(liquibase.database.Database). If no or null SqlStatements are returned by generateStatements then this method returns true. If AbstractChange.generateStatementsVolatile(liquibase.database.Database) returns true, we cannot call generateStatements and so assume true.

Specified by:

supports in interface Change

Overrides:

supports in class AbstractChange

getCatalogName

public String getCatalogName()

getSchemaName

public String getSchemaName()

getTableName

public String getTableName()

getColumn1Name

public String getColumn1Name()

getColumn2Name

public String getColumn2Name()

getJoinString

public String getJoinString()

getFinalColumnName

public String getFinalColumnName()

getFinalColumnType

public String getFinalColumnType()

generateStatementsVolatile

public boolean generateStatementsVolatile(Database database)

Description copied from class: AbstractChange

Implementation delegates logic to the SqlGenerator.generateStatementsIsVolatile(Database) method on the SqlStatement objects returned by Change.generateStatements(liquibase.database.Database). If zero or null SqlStatements are returned by generateStatements then this method returns false.

Specified by:

generateStatementsVolatile in interface Change

Overrides:

generateStatementsVolatile in class AbstractChange

generateStatements

public SqlStatement[] generateStatements(Database database)

Description copied from interface: Change

Generates the SqlStatement objects required to run the change for the given database.

NOTE: This method may be called multiple times throughout the changelog execution process and may be called in documentation generation and other integration points as well.

If this method reads from the current database state or uses any other logic that will be affected by whether previous changeSets have ran or not, you must return true from Change.generateStatementsVolatile(liquibase.database.Database).

getConfirmationMessage

public String getConfirmationMessage()

Description copied from interface: Change

Confirmation message to be displayed after the change is executed. Should include relevant configuration settings to make it as helpful as possible. This method may be called outside the changelog execution process, such as in documentation generation.

getSerializedObjectNamespace

public String getSerializedObjectNamespace()

Specified by:

getSerializedObjectNamespace in interface LiquibaseSerializable

Overrides:

getSerializedObjectNamespace in class AbstractChange