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Add initial support for multiple database schemata

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This adds initial basic support for handling different database schemata
at once to the backend code. This is still far from working properly but
shouldn't break much either - mostly because it's not really used yet in
the user interface code.
This commit is contained in:
Martin Kleusberg
2017-09-02 16:44:24 +02:00
parent 4339119377
commit 532fcd3f6b
16 changed files with 265 additions and 185 deletions
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src/sqlitedb.h
+21 -17
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@@ -16,7 +16,8 @@ enum
kLogMsg_App
};
typedef QMultiMap<QString, sqlb::ObjectPtr> objectMap;
typedef QMultiMap<QString, sqlb::ObjectPtr> objectMap; // Maps from object type (table, index, view, trigger) to a pointer to the object representation
typedef QMap<QString, objectMap> schemaMap; // Maps from the schema name (main, temp, attached schemas) to the object map for that schema
class DBBrowserDB : public QObject
{
@@ -42,50 +43,53 @@ public:
/**
* @brief getRow Executes a sqlite statement to get the rowdata(columns)
* for the given rowid.
* @param schemaName Name of the database schema.
* @param sTableName Table to query.
* @param rowid The rowid to fetch.
* @param rowdata A list of QByteArray containing the row data.
* @return true if statement execution was ok, else false.
*/
bool getRow(const QString& sTableName, const QString& rowid, QList<QByteArray>& rowdata);
bool getRow(const sqlb::ObjectIdentifier& table, const QString& rowid, QList<QByteArray>& rowdata);
/**
* @brief max Queries the table t for the max value of field.
* @param t Table to query
* @param tableName Table to query
* @param field Field to get the max value
* @return the max value of the field or 0 on error
*/
QString max(const sqlb::Table& t, sqlb::FieldPtr field) const;
QString max(const sqlb::ObjectIdentifier& tableName, sqlb::FieldPtr field) const;
void updateSchema();
QString addRecord(const QString& sTableName);
QString addRecord(const sqlb::ObjectIdentifier& tablename);
/**
* @brief Creates an empty insert statement.
* @param schemaName The name of the database schema in which to find the table
* @param pk_value This optional parameter can be used to manually set a specific value for the primary key column
* @return An sqlite conform INSERT INTO statement with empty values. (NULL,'',0)
*/
QString emptyInsertStmt(const sqlb::Table& t, const QString& pk_value = QString()) const;
bool deleteRecords(const QString& table, const QStringList& rowids);
bool updateRecord(const QString& table, const QString& column, const QString& rowid, const QByteArray& value, bool itsBlob, const QString& pseudo_pk = QString());
QString emptyInsertStmt(const QString& schemaName, const sqlb::Table& t, const QString& pk_value = QString()) const;
bool deleteRecords(const sqlb::ObjectIdentifier& table, const QStringList& rowids);
bool updateRecord(const sqlb::ObjectIdentifier& table, const QString& column, const QString& rowid, const QByteArray& value, bool itsBlob, const QString& pseudo_pk = QString());
bool createTable(const QString& name, const sqlb::FieldVector& structure);
bool renameTable(const QString& from_table, const QString& to_table);
bool addColumn(const QString& table, const sqlb::FieldPtr& field);
bool createTable(const sqlb::ObjectIdentifier& name, const sqlb::FieldVector& structure);
bool renameTable(const QString& schema, const QString& from_table, const QString& to_table);
bool addColumn(const sqlb::ObjectIdentifier& tablename, const sqlb::FieldPtr& field);
/**
* @brief renameColumn Can be used to rename, modify or drop an existing column of a given table
* @param table_name Specifies the name of the table to edit
* @param schema Specifies the name of the schema, i.e. the database name, of the table
* @param tablename Specifies the name of the table to edit
* @param table Specifies the table to edit. The table constraints are used from this but not the columns
* @param name Name of the column to edit
* @param to The new field definition with changed name, type or the like. If Null-Pointer is given the column is dropped.
* @param move Set this to a value != 0 to move the new column to a different position
* @return true if renaming was successful, false if not. In the latter case also lastErrorMessage is set
*/
bool renameColumn(const QString& tablename, const sqlb::Table& table, const QString& name, sqlb::FieldPtr to, int move = 0);
bool renameColumn(const sqlb::ObjectIdentifier& tablename, const sqlb::Table& table, const QString& name, sqlb::FieldPtr to, int move = 0);
objectMap getBrowsableObjects() const;
const sqlb::ObjectPtr getObjectByName(const QString& name) const;
objectMap getBrowsableObjects(const QString& schema) const;
const sqlb::ObjectPtr getObjectByName(const sqlb::ObjectIdentifier& name) const;
bool isOpen() const;
bool encrypted() const { return isEncrypted; }
bool readOnly() const { return isReadOnly; }
@@ -100,13 +104,13 @@ public:
bool loadExtension(const QString& filename);
QVector<QPair<QString, QString>> queryColumnInformation(const QString& object_name);
QVector<QPair<QString, QString>> queryColumnInformation(const QString& schema_name, const QString& object_name);
QString generateSavepointName(const QString& identifier = QString()) const;
sqlite3 * _db;
objectMap objMap;
schemaMap schemata;
signals:
void sqlExecuted(QString sql, int msgtype);