kexi

KexiDB::AlterTableHandler::ChangeFieldPropertyAction Class Reference

#include <alter.h>

Inheritance diagram for KexiDB::AlterTableHandler::ChangeFieldPropertyAction:

KexiDB::AlterTableHandler::FieldActionBase KexiDB::AlterTableHandler::ActionBase List of all members.

Detailed Description

Defines an action for changing a single property value of a table field. Supported properties are currently: "name", "type", "caption", "description", "unsigned", "length", "precision", "width", "defaultValue", "primaryKey", "unique", "notNull", "allowEmpty", "autoIncrement", "indexed", "visibleDecimalPlaces"

More to come.

Definition at line 271 of file alter.h.


Public Member Functions

 ChangeFieldPropertyAction (const QString &fieldName, const QString &propertyName, const QVariant &newValue, int uid)
 ChangeFieldPropertyAction (bool null)
virtual ~ChangeFieldPropertyAction ()
QString propertyName () const
QVariant newValue () const
virtual QString debugString (const DebugOptions &debugOptions=DebugOptions())
virtual void simplifyActions (ActionDictDict &fieldActions)
virtual bool shouldBeRemoved (ActionDictDict &fieldActions)
virtual tristate updateTableSchema (TableSchema &table, Field *field, QMap< QString, QString > &fieldMap)

Protected Member Functions

virtual void updateAlteringRequirements ()
virtual tristate execute (Connection &conn, TableSchema &table)

Protected Attributes

QString m_propertyName
QVariant m_newValue

Member Function Documentation

void AlterTableHandler::ChangeFieldPropertyAction::simplifyActions ( ActionDictDict fieldActions  )  [virtual]

Legend: A,B==fields, P==property, [....]==action, (..,..,..) group of actions, <...> internal operation. Case 1. (special) when new action=[rename A to B] and exists=[rename B to C] => remove [rename B to C] and set result to new [rename A to C] and go to 1b. Case 1b. when new action=[rename A to B] and actions exist like [set property P to C in field B] or like [delete field B] or like [move field B] => change B to A for all these actions Case 2. when new action=[change property in field A] (property != name) and exists=[remove A] or exists=[change property in field A] => do not add [change property in field A] because it will be removed anyway or the property will change

Reimplemented from KexiDB::AlterTableHandler::ActionBase.

Definition at line 312 of file alter.cpp.

bool AlterTableHandler::ChangeFieldPropertyAction::shouldBeRemoved ( ActionDictDict fieldActions  )  [virtual]

After calling simplifyActions() for each action, shouldBeRemoved() is called for them as an additional step. This is used for ChangeFieldPropertyAction items so actions that do not change property values are removed.

Reimplemented from KexiDB::AlterTableHandler::ActionBase.

Definition at line 385 of file alter.cpp.

tristate AlterTableHandler::ChangeFieldPropertyAction::execute ( Connection conn,
TableSchema table 
) [protected, virtual]

Performs physical execution of this action.

Many of the properties must be applied using a separate algorithm.

Todo:
errmsg

Todo:

Reimplemented from KexiDB::AlterTableHandler::ActionBase.

Definition at line 413 of file alter.cpp.


The documentation for this class was generated from the following files:
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