标签：inter rman hint sign where structure wrap new applet
Provides the API for accessing and processing data stored in a data source (usually a relational database) using the Java? programming language. This API includes a framework whereby different drivers can be installed dynamically to access different data sources. Although the JDBC? API is mainly geared to passing SQL statements to a database, it provides for reading and writing data from any data source with a tabular format. The reader/writer facility, available through the javax.sql.RowSet group of interfaces, can be customized to use and update data from a spread sheet, flat file, or any other tabular data source.
The JDBC? 4.3 API includes both the java.sql package, referred to as the JDBC core API, and the javax.sql package, referred to as the JDBC Optional Package API. This complete JDBC API is included in the Java? Standard Edition (Java SE?), version 7. The javax.sql package extends the functionality of the JDBC API from a client-side API to a server-side API, and it is an essential part of the Java? Enterprise Edition (Java EE?) technology.
The JDBC 4.3 API incorporates all of the previous JDBC API versions:
Classes, interfaces, methods, fields, constructors, and exceptions have the following "since" tags that indicate when they were introduced into the Java platform. When these "since" tags are used in Javadoc? comments for the JDBC API, they indicate the following:
NOTE: Many of the new features are optional; consequently, there is some variation in drivers and the features they support. Always check your driver‘s documentation to see whether it supports a feature before you try to use it.
NOTE: The class SQLPermission was added in the Java? 2 SDK, Standard Edition, version 1.3 release. This class is used to prevent unauthorized access to the logging stream associated with the DriverManager, which may contain information such as table names, column data, and so on.
java.sql Package Contains
The java.sql package contains API for the following:
DriverManager facility
DriverManager class -- makes a connection with a driverSQLPermission class -- provides permission when code running within a Security Manager, such as an applet, attempts to set up a logging stream through the DriverManagerDriver interface -- provides the API for registering and connecting drivers based on JDBC technology ("JDBC drivers"); generally used only by the DriverManager classDriverPropertyInfo class -- provides properties for a JDBC driver; not used by the general userStatement -- used to send basic SQL statementsPreparedStatement -- used to send prepared statements or basic SQL statements (derived from Statement)CallableStatement -- used to call database stored procedures (derived from PreparedStatement)Connection interface -- provides methods for creating statements and managing connections and their propertiesSavepoint -- provides savepoints in a transactionResultSet interfaceArray interface -- mapping for SQL ARRAYBlob interface -- mapping for SQL BLOBClob interface -- mapping for SQL CLOBDate class -- mapping for SQL DATENClob interface -- mapping for SQL NCLOBRef interface -- mapping for SQL REFRowId interface -- mapping for SQL ROWIDStruct interface -- mapping for SQL STRUCTSQLXML interface -- mapping for SQL XMLTime class -- mapping for SQL TIMETimestamp class -- mapping for SQL TIMESTAMPTypes class -- provides constants for SQL typesSQLData interface -- specifies the mapping of a UDT to an instance of this classSQLInput interface -- provides methods for reading UDT attributes from a streamSQLOutput interface -- provides methods for writing UDT attributes back to a streamDatabaseMetaData interface -- provides information about the databaseResultSetMetaData interface -- provides information about the columns of a ResultSet objectParameterMetaData interface -- provides information about the parameters to PreparedStatement commandsSQLException -- thrown by most methods when there is a problem accessing data and by some methods for other reasonsSQLWarning -- thrown to indicate a warningDataTruncation -- thrown to indicate that data may have been truncatedBatchUpdateException -- thrown to indicate that not all commands in a batch update executed successfullyjava.sql and javax.sql Features Introduced in the JDBC 4.3 APISharding supportConnection to be able to provide hints to the driver that a request, an independent unit of work, is beginning or endingDatabaseMetaData to determine if Sharding is supporteddrivers to DriverManager to return a Stream of the currently loaded and available JDBC driversStatement for enquoting literals and simple identifiersjava.sql and javax.sql Features Introduced in the JDBC 4.2 APIJDBCType enum and SQLType interfaceREF CURSORS in CallableStatementDatabaseMetaData methods to return maximum Logical LOB size and if Ref Cursors are supportedjava.sql and javax.sql Features Introduced in the JDBC 4.1 APIConnection, ResultSet and Statement objects to be used with the try-with-resources statementCallableStatement and ResultSet to specify the Java type to convert to via the getObject methodDatabaseMetaData methods to return PseudoColumns and if a generated key is always returnedConnection to specify a database schema, abort and timeout a physical connection.Statement object when its dependent objects have been closedDriver, DataSource, ConnectionPoolDataSource and XADataSourcejava.sql and javax.sql Features Introduced in the JDBC 4.0 APIjava.sql.Driver class via Class.forNamePreparedStatement that is associated with a PooledConnection has been closed or the driver determines is invalidjava.sql and javax.sql Features Introduced in the JDBC 3.0 APIConnectionPoolDataSource -- specify how connections are to be pooledPreparedStatement objectResultSet objects returned from CallableStatement objects open at the same timeCallableStatement objects by name as well as by indexResultSet holdability -- ability to specify whether cursors should be held open or closed at the end of a transactionRef object referencesBLOB, CLOB, ARRAY, and REF values.java.sql.Types.DATALINK data type -- allows JDBC drivers access to objects stored outside a data sourcejava.sql Features Introduced in the JDBC 2.1 Core APIResultSet interface that allow the cursor to be moved to a particular row or to a position relative to its current positionResultSet updater methodsjava.math.BigDecimal values, additional security, and support for time zones in date, time, and timestamp values.javax.sql Features Introduced in the JDBC 2.0 Optional Package APIDataSource interface as a means of making a connection. The Java Naming and Directory Interface? (JNDI) is used for registering a DataSource object with a naming service and also for retrieving it.RowSet technology -- providing a convenient means of handling and passing data
A user-defined type (UDT) defined in SQL can be mapped to a class in the Java programming language. An SQL structured type or an SQL DISTINCT type are the UDTs that may be custom mapped. The following three steps set up a custom mapping:
DISTINCT type in SQLSQLData interface.Connection object‘s type map that contains two things:
Class object for the class that implements the SQLData interfaceWhen these are in place for a UDT, calling the methods ResultSet.getObject or CallableStatement.getObject on that UDT will automatically retrieve the custom mapping for it. Also, thePreparedStatement.setObject method will automatically map the object back to its SQL type to store it in the data source.
标签：inter rman hint sign where structure wrap new applet
原文地址：https://www.cnblogs.com/borter/p/9459170.html
