AlterTable

java.lang.Object
- org.h2.command.Prepared
- - org.h2.command.ddl.DefineCommand
  - - org.h2.command.ddl.SchemaCommand
    - - org.h2.command.ddl.AlterTable

Direct Known Subclasses:

AlterTableAddConstraint, AlterTableDropConstraint, AlterTableRename, AlterTableRenameColumn, AlterTableRenameConstraint
```
public abstract class AlterTable
extends SchemaCommand
```
The base class for ALTER TABLE commands.

Field Summary

Fields
Modifier and Type Field Description

(package private) boolean ifTableExists

(package private) java.lang.String tableName
- Fields inherited from class org.h2.command.ddl.DefineCommand
  transactional
- Fields inherited from class org.h2.command.Prepared
  create, parameters, prepareAlways, session, sqlStatement, sqlTokens

Constructor Summary

Constructors
Constructor Description

AlterTable(SessionLocal session, Schema schema)

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`setIfTableExists(boolean b)`
`void`	`setTableName(java.lang.String tableName)`
`long`	`update()`	Execute the statement.
`(package private) abstract long`	`update(Table table)`

Methods inherited from class org.h2.command.ddl.SchemaCommand
getSchema

Methods inherited from class org.h2.command.ddl.DefineCommand
isReadOnly, isTransactional, queryMeta, setTransactional

Methods inherited from class org.h2.command.Prepared
checkCanceled, checkParameters, collectDependencies, getCteCleanups, getCurrentRowNumber, getObjectId, getParameters, getPersistedObjectId, getPlanSQL, getSession, getSimpleSQL, getSQL, getSQLTokens, getType, isCacheable, isQuery, needRecompile, prepare, query, setCommand, setCteCleanups, setCurrentRowNumber, setParameterList, setPersistedObjectId, setPrepareAlways, setRow, setSession, setSQL, toString

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

tableName
```
java.lang.String tableName
```

ifTableExists
```
boolean ifTableExists
```

Constructor Detail

AlterTable

AlterTable(SessionLocal session,
           Schema schema)

Method Detail

setTableName

public final void setTableName(java.lang.String tableName)

setIfTableExists

public final void setIfTableExists(boolean b)

update
```
public final long update()
```
Description copied from class: Prepared

Execute the statement.

Overrides:

update in class Prepared

Returns:

the update count

update
```
abstract long update(Table table)
```