org.clazzes.jdbc2xml.helper
Class SQLHelper

java.lang.Object
  org.clazzes.jdbc2xml.helper.SQLHelper

public abstract class SQLHelper
extends java.lang.Object

Helper functions common for many SQL engines.

Author:

wglas

Constructor Summary

SQLHelper()

Method Summary

static void	appendTypePrec(java.lang.StringBuffer sb, java.lang.String type, java.lang.Integer prec) Append an SQL type name together with a precision to a string buffer.
static void	appendTypePrecScale(java.lang.StringBuffer sb, java.lang.String type, java.lang.Integer prec, java.lang.Integer scale) Append an SQL type name together with a precision and a scale to a string buffer.
static void	copyResultField(java.sql.PreparedStatement ps, int pc, java.sql.ResultSet rs, int rc) Copies a column from a result set to a placeholder of a PreparedStatment.
static void	executeUpdate(java.sql.Connection connection, java.lang.String sql) Perform an SQL update statement.
static void	quoteISOSqlString(java.lang.StringBuffer sb, java.lang.String s) Quote the given string as defined by ISO SQL by doubling single quotes.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SQLHelper

public SQLHelper()

Method Detail

quoteISOSqlString

public static void quoteISOSqlString(java.lang.StringBuffer sb,
                                     java.lang.String s)

Quote the given string as defined by ISO SQL by doubling single quotes.

Parameters:

sb - The buffer to put the result to.

s - The String to quote.

appendTypePrec

public static void appendTypePrec(java.lang.StringBuffer sb,
                                  java.lang.String type,
                                  java.lang.Integer prec)

Append an SQL type name together with a precision to a string buffer.

Parameters:

sb - The buffer to put the result to.

type - The SQL name of the type.

prec - The optional precision (field width).

appendTypePrecScale

public static void appendTypePrecScale(java.lang.StringBuffer sb,
                                       java.lang.String type,
                                       java.lang.Integer prec,
                                       java.lang.Integer scale)

Append an SQL type name together with a precision and a scale to a string buffer.

Parameters:

sb - The buffer to put the result to.

type - The SQL name of the type.

prec - The optional precision (field width).

scale - The optional scale (fractional digits).

executeUpdate

public static void executeUpdate(java.sql.Connection connection,
                                 java.lang.String sql)
                          throws java.sql.SQLException

Perform an SQL update statement.

Parameters:

connection - The JDBC connection to use.

sql - The SQL update statement.

Throws:

java.sql.SQLException - Upon database errors

See Also:

Statement.executeUpdate(String)

copyResultField

public static void copyResultField(java.sql.PreparedStatement ps,
                                   int pc,
                                   java.sql.ResultSet rs,
                                   int rc)
                            throws java.sql.SQLException

Copies a column from a result set to a placeholder of a PreparedStatment.

Parameters:

ps - The prepared statement.

pc - The column number of the column to be filled.

rs - The result set from which to retrieve the data.

rc - The column of the result set to be evaluated.

Throws:

java.sql.SQLException