Connection (gb.db2)

This class represents a connection to a database.

To connect to a database, create a connection object, fill the needed properties, and call the Open method.

属性

Charset	Returns the charset used by the database.
Collations	Return the list of collations available in the database
Databases	Returns a collection of all databases managed by the database server.
Error	Returns the code of the last error raised by the database driver.
FullVersion	Return the full version string of the database server.
Handle	Return the handle of the connection.
Host	Returns or sets the host where the database server resides.
IgnoreCharset	Return or set if the database charset should be ignored.
LastInsertId	Return the value of the last serial field used in an INSERT statement.
Login	Returns or sets the user used for establishing the connection.
Name	Returns or sets the name of the database you want to connect to.
Opened	Returns if the connection is opened.
Options	Return or set the connection options.
Password	Returns or sets the password used for establishing the connection.
Port	Returns or sets the TCP/IP port used for establishing the connection.
SQL	Returns a SQLRequest object on that connection.
Tables	Returns a virtual collection used for managing the tables of the database.
Timeout	Return or set the connection timeout in seconds.
Type	Represents the type of the database server you want to connect to.
Url	Return the connection URL.
User	A synonym for the Login property.
Users	Returns a collection of all users registered in the database server.
Version	Returns the version of the database that the driver has connected to.

方法

ApplyTemplate	Apply a template to the connection, i.e. replicate the database structure described by the template string into the current database.
Begin	Start a transaction.
Close	Close the connection.
Commit	Commit a transaction.
Copy	Return a copy of the connection object.
Create	Return a read/write Result object used for creating records in the specified table.
Delete	Removes records from a database table.
Edit	Returns a read/write Result object used for editing records in the specified table.
Exec	Executes an arbitrary SQL request, and returns a read-only Result containing the result of the request.
Find	Returns a read-only Result object used for querying records in the specified table.
GetTemplate	Return the structure of the database as a template string.
Limit	Limits the number of records returned by the next query.
Open	Opens a connection to the specified database.
Quote	Returns a quoted identifier so that you can freely insert it into a query.
Rollback	Cancel a transaction.
Subst	Creates a SQL sentence by substituting its arguments into a format string.

SQLite connections

For SQLite connections, the following algorithm is used:

• If Name is null, then a memory database is opened.

• If Name is an absolute path, then this path is used.

• If Name is a relative path, then:
  • If Host is null, then the database is located in the application temporary directory. See Temp$() for more information.

  • Otherwise, Host gives the database directory, and the database path is the result of concatenating Host and Name.

ODBC connections

For ODBC connections, the following algorithm is used:

• If Host are defined and also Login, it will connect using it as DSN name.

• If Host has semicolons at least one, it will assume the property holds a ConnStr.

• If Host has no semicolons, it will connect using it as DSN name.
  • Otherwise, it will use the ConnStr in .Host to call ODBC SQLDriverConnect function.

See also