Create table: data type
/*
Copyright 2003 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
Use of this software is authorized pursuant to the terms of the license found at
http://developer.java.sun.com/berkeley_license.html.
Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
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are permitted provided that the following conditions are met:
- Redistribution of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
- Redistribution in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
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be used to endorse or promote products derived from this software without
specific prior written permission.
This software is provided "AS IS," without a warranty of any kind.
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ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICORSYSTEMS, INC. ("SUN")
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/*
* Copyright 2003 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
* Use of this software is authorized pursuant to the terms of the license found at
* http://developer.java.sun.com/berkeley_license.html.
*/
import java.sql.*;
import java.util.*;
public class CreateNewTable {
public static void main(String [] args) {
String url = "jdbc:mySubprotocol:myDataSource";
Connection con;
Statement stmt;
try {
Class.forName("myDriver.ClassName");
} catch(java.lang.ClassNotFoundException e) {
System.err.print("ClassNotFoundException: ");
System.err.println(e.getMessage());
}
try {
con = DriverManager.getConnection(url,
"myLogin", "myPassword");
stmt = con.createStatement();
Vector dataTypes = getDataTypes(con);
String tableName;
String columnName;
String sqlType;
String prompt = "Enter the new table name and hit Return: ";
tableName = getInput(prompt);
String createTableString = "create table " + tableName + " (";
String commaAndSpace = ", ";
boolean firstTime = true;
while (true){
System.out.println("");
prompt = "Enter a column name " +
"(or nothing when finished) \nand hit Return: ";
columnName = getInput(prompt);
if (firstTime) {
if (columnName.length() == 0) {
System.out.print("Need at least one column;");
System.out.println(" please try again");
continue;
} else {
createTableString += columnName + " ";
firstTime = false;
}
} else if (columnName.length() == 0) {
break;
} else {
createTableString += commaAndSpace
+ columnName + " ";
}
String localTypeName = null;
String paramString = "";
while (true) {
System.out.println("");
System.out.println("LIST OF TYPES YOU MAY USE: ");
boolean firstPrinted = true;
int length = 0;
for (int i = 0; i < dataTypes.size(); i++) {
DataType dataType = (DataType)dataTypes.get(i);
if (!dataType.needsToBeSet()) {
if (!firstPrinted)
System.out.print(commaAndSpace);
else
firstPrinted = false;
System.out.print(dataType.getSQLType());
length += dataType.getSQLType().length();
if ( length > 50 ) {
System.out.println("");
length = 0;
firstPrinted = true;
}
}
}
System.out.println("");
int index;
prompt = "Enter a column type " +
"from the list and hit Return: ";
sqlType = getInput(prompt);
for (index = 0; index < dataTypes.size(); index++) {
DataType dataType = (DataType)dataTypes.get(index);
if (dataType.getSQLType().equalsIgnoreCase(
sqlType) &&
!dataType.needsToBeSet()) {
break;
}
}
localTypeName = null;
paramString = "";
if (index < dataTypes.size()) { // there was a match
String params;
DataType dataType = (DataType)dataTypes.get(index);
params = dataType.getParams();
localTypeName = dataType.getLocalType();
if (params != null) {
prompt = "Enter " + params + ": ";
paramString = "(" + getInput(prompt) + ")";
}
break;
}
else { // use the name as given
prompt = "Are you sure? " +
"Enter 'y' or 'n' and hit Return: ";
String check = getInput(prompt) + " ";
check = check.toLowerCase().substring(0,1);
if (check.equals("n"))
continue;
else {
localTypeName = sqlType;
break;
}
}
}
createTableString += localTypeName + paramString;
}
createTableString += ")";
System.out.println("");
System.out.print("Your CREATE TABLE statement as ");
System.out.println("sent to your DBMS: ");
System.out.println(createTableString);
System.out.println("");
stmt.executeUpdate(createTableString);
stmt.close();
con.close();
} catch(SQLException ex) {
System.err.println("SQLException: " + ex.getMessage());
}
}
private static Vector getDataTypes(Connection con) throws SQLException {
String structName = null,
distinctName = null,
javaName = null;
// create a vector of class DataType initialized with
// the SQL code, the SQL type name, and two null entries
// for the local type name and the creation parameter(s)
Vector dataTypes = new Vector();
dataTypes.add(new DataType(java.sql.Types.BIT, "BIT"));
dataTypes.add(new DataType(java.sql.Types.TINYINT, "TINYINT"));
dataTypes.add(new DataType(java.sql.Types.SMALLINT, "SMALLINT"));
dataTypes.add(new DataType(java.sql.Types.INTEGER, "INTEGER"));
dataTypes.add(new DataType(java.sql.Types.BIGINT, "BIGINT"));
dataTypes.add(new DataType(java.sql.Types.FLOAT, "FLOAT"));
dataTypes.add(new DataType(java.sql.Types.REAL, "REAL"));
dataTypes.add(new DataType(java.sql.Types.DOUBLE, "DOUBLE"));
dataTypes.add(new DataType(java.sql.Types.NUMERIC, "NUMERIC"));
dataTypes.add(new DataType(java.sql.Types.DECIMAL, "DECIMAL"));
dataTypes.add(new DataType(java.sql.Types.CHAR, "CHAR"));
dataTypes.add(new DataType(java.sql.Types.VARCHAR, "VARCHAR"));
dataTypes.add(new DataType(java.sql.Types.LONGVARCHAR, "LONGVARCHAR"));
dataTypes.add(new DataType(java.sql.Types.DATE, "DATE"));
dataTypes.add(new DataType(java.sql.Types.TIME,"TIME"));
dataTypes.add(new DataType(java.sql.Types.TIMESTAMP, "TIMESTAMP"));
dataTypes.add(new DataType(java.sql.Types.BINARY, "BINARY"));
dataTypes.add(new DataType(java.sql.Types.VARBINARY, "VARBINARY"));
dataTypes.add(new DataType(java.sql.Types.LONGVARBINARY,
"LONGVARBINARY"));
dataTypes.add(new DataType(java.sql.Types.NULL, "NULL"));
dataTypes.add(new DataType(java.sql.Types.OTHER, "OTHER"));
dataTypes.add(new DataType(java.sql.Types.BLOB, "BLOB"));
dataTypes.add(new DataType(java.sql.Types.CLOB, "CLOB"));
DatabaseMetaData dbmd = con.getMetaData();
ResultSet rs = dbmd.getTypeInfo();
while (rs.next()) {
int codeNumber = rs.getInt("DATA_TYPE");
String dbmsName = rs.getString("TYPE_NAME");
String createParams = rs.getString("CREATE_PARAMS");
if ( codeNumber == Types.STRUCT && structName == null )
structName = dbmsName;
else if ( codeNumber == Types.DISTINCT && distinctName == null )
distinctName = dbmsName;
else if ( codeNumber == Types.JAVA_OBJECT && javaName == null )
javaName = dbmsName;
else {
for (int i = 0; i < dataTypes.size(); i++) {
// find entry that matches the SQL code,
// and if local type and params are not already set,
// set them
DataType type = (DataType)dataTypes.get(i);
if (type.getCode() == codeNumber) {
type.setLocalTypeAndParams(dbmsName, createParams);
}
}
}
}
int[] types = {Types.STRUCT, Types.DISTINCT, Types.JAVA_OBJECT};
rs = dbmd.getUDTs(null, "%", "%", types);
while (rs.next()) {
String typeName = null;
DataType dataType = null;
if ( dbmd.isCatalogAtStart() )
typeName = rs.getString(1) + dbmd.getCatalogSeparator() +
rs.getString(2) + "." + rs.getString(3);
else
typeName = rs.getString(2) + "." + rs.getString(3) +
dbmd.getCatalogSeparator() + rs.getString(1);
switch (rs.getInt(5)) {
case Types.STRUCT:
dataType = new DataType(Types.STRUCT, typeName);
dataType.setLocalTypeAndParams(structName, null);
break;
case Types.DISTINCT:
dataType = new DataType(Types.DISTINCT, typeName);
dataType.setLocalTypeAndParams(distinctName, null);
break;
case Types.JAVA_OBJECT:
dataType = new DataType(Types.JAVA_OBJECT, typeName);
dataType.setLocalTypeAndParams(javaName, null);
break;
}
dataTypes.add(dataType);
}
return dataTypes;
}
private static String getInput(String prompt) throws SQLException {
System.out.print(prompt);
System.out.flush();
try {
java.io.BufferedReader bin;
bin = new java.io.BufferedReader(
new java.io.InputStreamReader(System.in));
String result = bin.readLine();
return result;
} catch(java.io.IOException ex) {
System.out.println("Caught java.io.IOException:");
System.out.println(ex.getMessage());
return "";
}
}
}
class DataType {
private int code;
private String SQLType;
private String localType = null;
private String params = null;
private boolean needsSetting = true;
public DataType(int code, String SQLType) {
this.code = code;
this.SQLType = SQLType;
}
public boolean needsToBeSet() {
return needsSetting;
}
public int getCode() {
return code;
}
public String getSQLType() {
return SQLType;
}
public String getLocalType() {
return localType;
}
public String getParams() {
return params;
}
public void setLocalTypeAndParams(String local, String p) {
if (needsSetting) {
localType = local;
params = p;
needsSetting = false;
}
}
}
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