Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Java DatabaseMetaData getTypeInfo() method with example
The getTypeInfo() method of the DatabaseMetadata interface is used to get the description of all the data-types supported by the underlying database.
This method returns a ResultSet object describing data types supported. This object holds values for the following details (as column names) −
| Column Name | Data Type | Description |
|---|---|---|
| TYPE_NAME | String | Name of the data type. |
| DATA_TYPE | int | Integer value representing this datatype. |
| PRECISION | int | Maximum precision of this datatype. |
| LITERAL_PREFIX | String | Prefix used to quote a string literal. |
| LITERAL_SUFFIX | String | suffix used to quote a string literal. |
| CASE_SENSITIVE | boolean | Determines whether this datatype is case sensitive |
| UNSIGNED_ATTRIBUTE | boolean | Determines whether this datatype is an un-signed attribute. |
| FIXED_PREC_SCALE | boolean | Determines whether the current datatype can be used as a value of currency. |
| AUTO_INCREMENT | boolean | Determines whether the current datatype can be used for auto-increment. |
| LOCAL_TYPE_NAME | String | Localized version of this datatype. |
To get the DatabaseMetaData object −
- Make sure your database is up and running.
- Register the driver using the registerDriver() method of the DriverManager class. Pass an object of the driver class corresponding to the underlying database.
- Get the connection object using the getConnection() method of the DriverManager class. Pass the URL the database and, user name, password of a user in the database, as String variables.
- Get the DatabaseMetaData object with respect to the current connection using the getMetaData() method of the Connection interface.
Finally get ResultSet object holding the description of the supported data types, by invoking the getTypeInfo() method of the DatabaseMetaData interface.
Following JDBC program establishes connection with MySQL database, retrieves the description of all the datatypes.
Example
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
public class DatabaseMetadata_getTypeInfo {
public static void main(String args[]) throws SQLException {
//Registering the Driver
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//Getting the connection
String url = "jdbc:mysql://localhost/mydatabase";
Connection con = DriverManager.getConnection(url, "root", "password");
System.out.println("Connection established......");
//Retrieving the meta data object
DatabaseMetaData metaData = con.getMetaData();
//Retrieving the columns in the database
ResultSet info = metaData.getTypeInfo();
//Printing the column name and size
while (info.next()) {
System.out.println("Data type name: "+info.getString("TYPE_NAME"));
System.out.println("Integer value representing this datatype: "+info.getInt("DATA_TYPE"));
System.out.println("Maximum precision of this datatype: "+info.getInt("PRECISION"));
if(info.getBoolean("CASE_SENSITIVE")) {
System.out.println("Current datatype is case sensitive ");
} else {
System.out.println("Current datatype is not case sensitive ");
}
if(info.getBoolean("AUTO_INCREMENT")) {
System.out.println("Current datatype can be used for auto increment");
} else {
System.out.println("Current datatype can not be used for auto increment");
}
System.out.println(" ");
}
}
}Output
Connection established...... Data type name: BIT Integer value representing this datatype: -7 Maximum precision of this datatype: 1 Current datatype is case sensitive Current datatype can not be used for auto increment Data type name: BOOL Integer value representing this datatype: -7 Maximum precision of this datatype: 1 Current datatype is case sensitive Current datatype can not be used for auto increment Data type name: TINYINT Integer value representing this datatype: -6 Maximum precision of this datatype: 3 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: TINYINT UNSIGNED Integer value representing this datatype: -6 Maximum precision of this datatype: 3 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: BIGINT Integer value representing this datatype: -5 Maximum precision of this datatype: 19 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: BIGINT UNSIGNED Integer value representing this datatype: -5 Maximum precision of this datatype: 20 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: LONG VARBINARY Integer value representing this datatype: -4 Maximum precision of this datatype: 16777215 Current datatype is case sensitive Current datatype can not be used for auto increment Data type name: MEDIUMBLOB Integer value representing this datatype: -4 Maximum precision of this datatype: 16777215 Current datatype is case sensitive Current datatype can not be used for auto increment Data type name: LONGBLOB Integer value representing this datatype: -4 Maximum precision of this datatype: 2147483647 Current datatype is case sensitive Current datatype can not be used for auto increment Data type name: BLOB Integer value representing this datatype: -4 Maximum precision of this datatype: 65535 Current datatype is case sensitive Current datatype can not be used for auto increment Data type name: TINYBLOB Integer value representing this datatype: -4 Maximum precision of this datatype: 255 Current datatype is case sensitive Current datatype can not be used for auto increment Data type name: VARBINARY Integer value representing this datatype: -3 Maximum precision of this datatype: 255 Current datatype is case sensitive Current datatype can not be used for auto increment Data type name: BINARY Integer value representing this datatype: -2 Maximum precision of this datatype: 255 Current datatype is case sensitive Current datatype can not be used for auto increment Data type name: LONG VARCHAR Integer value representing this datatype: -1 Maximum precision of this datatype: 16777215 Current datatype is not case sensitive Current datatype can not be used for auto increment Data type name: MEDIUMTEXT Integer value representing this datatype: -1 Maximum precision of this datatype: 16777215 Current datatype is not case sensitive Current datatype can not be used for auto increment Data type name: LONGTEXT Integer value representing this datatype: -1 Maximum precision of this datatype: 2147483647 Current datatype is not case sensitive Current datatype can not be used for auto increment Data type name: TEXT Integer value representing this datatype: -1 Maximum precision of this datatype: 65535 Current datatype is not case sensitive Current datatype can not be used for auto increment Data type name: TINYTEXT Integer value representing this datatype: -1 Maximum precision of this datatype: 255 Current datatype is not case sensitive Current datatype can not be used for auto increment Data type name: CHAR Integer value representing this datatype: 1 Maximum precision of this datatype: 255 Current datatype is not case sensitive Current datatype can not be used for auto increment Data type name: NUMERIC Integer value representing this datatype: 2 Maximum precision of this datatype: 65 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: DECIMAL Integer value representing this datatype: 3 Maximum precision of this datatype: 65 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: INTEGER Integer value representing this datatype: 4 Maximum precision of this datatype: 10 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: INTEGER UNSIGNED Integer value representing this datatype: 4 Maximum precision of this datatype: 10 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: INT Integer value representing this datatype: 4 Maximum precision of this datatype: 10 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: INT UNSIGNED Integer value representing this datatype: 4 Maximum precision of this datatype: 10 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: MEDIUMINT Integer value representing this datatype: 4 Maximum precision of this datatype: 7 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: MEDIUMINT UNSIGNED Integer value representing this datatype: 4 Maximum precision of this datatype: 8 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: SMALLINT Integer value representing this datatype: 5 Maximum precision of this datatype: 5 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: SMALLINT UNSIGNED Integer value representing this datatype: 5 Maximum precision of this datatype: 5 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: FLOAT Integer value representing this datatype: 7 Maximum precision of this datatype: 10 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: DOUBLE Integer value representing this datatype: 8 Maximum precision of this datatype: 17 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: DOUBLE PRECISION Integer value representing this datatype: 8 Maximum precision of this datatype: 17 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: REAL Integer value representing this datatype: 8 Maximum precision of this datatype: 17 Current datatype is not case sensitive Current datatype can be used for auto increment Data type name: VARCHAR Integer value representing this datatype: 12 Maximum precision of this datatype: 255 Current datatype is not case sensitive Current datatype can not be used for auto increment Data type name: ENUM Integer value representing this datatype: 12 Maximum precision of this datatype: 65535 Current datatype is not case sensitive Current datatype can not be used for auto increment Data type name: SET Integer value representing this datatype: 12 Maximum precision of this datatype: 64 Current datatype is not case sensitive Current datatype can not be used for auto increment Data type name: DATE Integer value representing this datatype: 91 Maximum precision of this datatype: 0 Current datatype is not case sensitive Current datatype can not be used for auto increment Data type name: TIME Integer value representing this datatype: 92 Maximum precision of this datatype: 0 Current datatype is not case sensitive Current datatype can not be used for auto increment Data type name: DATETIME Integer value representing this datatype: 93 Maximum precision of this datatype: 0 Current datatype is not case sensitive Current datatype can not be used for auto increment Data type name: TIMESTAMP Integer value representing this datatype: 93 Maximum precision of this datatype: 0 Current datatype is not case sensitive Current datatype can not be used for auto increment
Updated on: 30-Jul-2019
255 Views
Advertisements