JDBC is a Java Application Programming Interface ( API) that you use to execute SQL statements. JDBC enables an application, such as Cold Fusion, to interact with various database management systems ( DBMSs without using interfaces that are database- and platform-specific. The following table describes the four types of JDBC drivers: Type Name Description JDBC- ODBC bridge Translates JDBC calls to ODBC calls, and sends them to the ODBC driver. Advantages: Allows access to many different databases. Disadvantages: The ODBC driver, and possibly the client database libraries, must reside on the Cold Fusion server computer. Performance is slower than other JDBC driver types. Adobe does not recommend this driver type unless your application requires DBMS-specific features. Native- API/partly Java driver Converts JDBC calls to database-specific calls. Advantages: Better performance than Type 1 driver. Disadvantages: The client database libraries of the vendor must reside on the same computer as Cold Fusion. Cold Fusion includes a Type 2 driver for use with Microsoft Access Unicode databases. JDBC- Net pure Java driver Translates JDBC calls to the middle-tier server, which then translates the request to the database-specific native-connectivity interface. Advantages: The database libraries of vendors are not required client computer. Can be tailored for small size (faster loading). Disadvantages: Database-specific code must be executed in the middle tier. Cold Fusion includes an ODBC socket Type 3 driver for use with Microsoft Access databases and ODBC data sources. Native-protocol/all- Java driver Converts JDBC calls to the network protocol used directly by the database. Advantages: Fast performance. No special software needed on the computer on which you run Cold Fusion. Disadvantages: Many of these protocols are proprietary, requiring a different driver for each database.
Please Rate, Comment System.out.println(date.to GMTString System.out.println(date.to String / different local time With the exception of to GMTString UTC and methods and constructors that take or return long, all other methods and constructors in these 4 classes are about local time. 3. All set XXX methods with a Calendar parameter in Prepared Statement are meant to send a local time value of the time zone in the Calendar parameter to the database. Therefore, if you want the database always store time value of a specific time zone ( EST, GMT, etc. you pass a Calendar instance of that time zone to these methods. For example, if a column must always stored GMT values, then the Prepare Statement for inserting new rows should have the following call: Calendar cal = Calendar.get Instance( Time Zone.get Time Zone( GMT prep.set Timestamp(1, timestamp, cal 4. All get XXX methods with a Calendar parameter in Callable Statement and Result Set are meant to create a local time of the VM computer from a local time value stored in the database, and the Calendar parameter indicates the time zone of the local time value from the database. For example, if the column in the database stores GMT values, then the Result Set used to retrieve this column should do the following: Calendar cal = Calendar.get Instance( Time Zone.get Time Zone( GMT Timestamp ts = rs.get Timestamp(column_name, cal 5. If you.
Getting Started The distribution comes with both a number of Junit Test Cases (package net.ucanaccess.test) and a simple java example class (net.ucanaccess.example. Example) which illustrate how UCan Access may be used. Getting UCan Access connection Class.for Name( net.ucanaccess.jdbc. Ucanaccess Driver Connection conn= Driver Manager.get Connection( jdbc:ucanaccess ,user, password for example: Connection conn= Driver Manager.get Connection( jdbc: Driver Properties Memory: set if hsqldb will work only in memory. Default=true. Lobscale(since UCan Access to optimize memory occupation when a relevant percent of memory occupation is for Ole( Blob) data. This may also allow, in many cases, to use the memory=true setting, whilst it was impossible before. It should be set to a value close to the average size of Ole instances. According with the HSQLDB documentation, the values allowed are 1,2,4,8,18,32 (the unit is Kb). Default is 2 if memory=true, 32 (hsqldb default) otherwise. Skipindexes (since UCan Access in order to minimize memory occupation. It allows skipping the creation of simple, untied to contraints, indexes. It doesn't have effect on referential integrity constraints (i.e., Index Unique, Foreign Key or Primary Key). Newdatabaseversion: UCan Access create a new access file in the specified version if this parameter is setted and the file specified in the jdbc url does not exist. Valid values for this parameter are: V2000, V2003, V2007, V2010. Openexclusive(it replaces Lockmdb that has been deprecated since UCan Access if Openexclusive is enabled ( Openexclusive=true Ucanaccess locks the mdb/accdb file to prevent access from other processes. Default=false. Showschema: if true, catalog PUBLIC and schema PUBLIC and others hsqldb schemas are shown in the Database Metadata implementation.
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