dbcheck.cpp File Reference

Go to the source code of this file.

Functions
static bool	UpdateDBVersionNumber (const QString &newnumber, QString &dbver)
	Updates the schema version stored in the database.
static bool	performActualUpdate (const char **updates, const char *version, QString &dbver)
	Runs a number of SQL commands, and updates the schema version.
static bool	doUpgradeTVDatabaseSchema (void)
	This is called by UpgradeTVDatabaseSchema() to actually upgrade the schema to what MythTV expects.
bool	UpgradeTVDatabaseSchema (const bool upgradeAllowed, const bool upgradeIfNoUI)
	Called from outside dbcheck.cpp to update the schema.
bool	InitializeMythSchema (void)
	command to get the the initial database layout from an empty database:
Variables
const QString	currentDatabaseVersion = MYTH_DATABASE_VERSION

---

Function Documentation

static bool UpdateDBVersionNumber	(	const QString &	newnumber,
		QString &	dbver
	)			[static]

Updates the schema version stored in the database.

Updates "DBSchemaVer" property in the settings table.

Parameters:

	newnumber	New schema version.
	dbver	the database version at the end of the function is returned in this parameter, if things go well this will be 'newnumber'.

Definition at line 343 of file mythtv/libs/libmythtv/dbcheck.cpp.

Referenced by doUpgradeTVDatabaseSchema(), and performActualUpdate().

static bool performActualUpdate	(	const char **	updates,
		const char *	version,
		QString &	dbver
	)			[static]

Runs a number of SQL commands, and updates the schema version.

Parameters:

	updates	array of SQL commands to issue, terminated by a NULL string.
	version	version we are updating db to.
	dbver	the database version at the end of the function is returned in this parameter, if things go well this will be 'version'.

Returns:

true on success, false on failure

Definition at line 394 of file mythtv/libs/libmythtv/dbcheck.cpp.

Referenced by doUpgradeTVDatabaseSchema(), doUpgradeVideoDatabaseSchema(), InitializeMythSchema(), InitializeVideoSchema(), and performActualUpdate().

static bool doUpgradeTVDatabaseSchema

(

void

)

[static]

This is called by UpgradeTVDatabaseSchema() to actually upgrade the schema to what MythTV expects.

This function Initializes the database if the "DBSchemaVer" property does not exist in the database. Otherwise it upgrades the schema from the one in that property to the currentDatabaseVersion, by running the SQL commands needed for each upgrade between the two versions. This will only upgrade the schema, so bad things may happen if you upgrade and then downgrade MythTV across DB Schema versions.

Definition at line 532 of file mythtv/libs/libmythtv/dbcheck.cpp.

Referenced by UpgradeTVDatabaseSchema().

bool UpgradeTVDatabaseSchema	(	const bool	upgradeAllowed,
		const bool	upgradeIfNoUI
	)

Called from outside dbcheck.cpp to update the schema.

If the "DBSchemaVer" property equals the currentDatabase version this returns true immediately. If not, we try to do a database backup, prompt the user for permission to do the upgrade, lock the schemalock table, call doUpgradeTVDatabaseSchema() to do the actual update, and then we unlock the schemalock table.

If the program running this function is killed while this is running then the schema may be corrupted.

Returns:

false on failure, error, or if the user selected "Exit."

Definition at line 443 of file mythtv/libs/libmythtv/dbcheck.cpp.

Referenced by main(), and run_backend().

bool InitializeMythSchema

(

void

)

command to get the the initial database layout from an empty database:

mysqldump --skip-comments --skip-opt --compact --skip-quote-names \ --create-options --ignore-table=mythconverg.schemalock mythconverg | \ sed '/^\(SET\|INS\).*;$/d;/^\/\*!40101.*$/d;s/^.*[^;]$/"&"/;s/^).*;$/"&",/'

command to get the initial data:

mysqldump --skip-comments --skip-opt --compact --skip-quote-names -t \ mythconverg | sed -e 's/^.*$/"&",/' -e 's#\#\\g'

don't forget to delete host specific data

Definition at line 6157 of file mythtv/libs/libmythtv/dbcheck.cpp.

Referenced by doUpgradeTVDatabaseSchema(), and main().

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Variable Documentation

const QString currentDatabaseVersion = MYTH_DATABASE_VERSION

Definition at line 22 of file mythtv/libs/libmythtv/dbcheck.cpp.

Referenced by doUpgradeTVDatabaseSchema(), InitializeDatabase(), UpgradeArchiveDatabaseSchema(), UpgradeBrowserDatabaseSchema(), UpgradeGalleryDatabaseSchema(), UpgradeGameDatabaseSchema(), UpgradeMusicDatabaseSchema(), UpgradeNewsDatabaseSchema(), and UpgradeTVDatabaseSchema().