Trying create db using ant
===

My build.xml

<?xml version='1.0'?> 
<project xmlns:ivy="antlib:org.apache.ivy.ant" name='myTest' basedir='.' default='usage'> 
    <property file='build.properties' /> 
    <property name='src.dir' value='src' /> 
    <property name='web.dir' value='war' /> 
    <property name='build.dir' value='${web.dir}/WEB-INF/classes' /> 
    <property name='name' value='myTest' />
    <property name="sql.driver" value="org.postgresql.Driver"/>
	<property name="sql.url" value="jdbc:postgresql://localhost:5432/tbook"/>
	<property name="sql.user" value="postgres"/>
	<property name="sql.pass" value="admin"/>
    <path id='master-classpath'> 
        <fileset dir='${web.dir}/WEB-INF/lib'> 
            <include name='*.jar' /> 
        </fileset> 
        <!-- We need the servlet API classes: --> 
        <!-- * for Tomcat 5/6 use servlet-api.jar --> 
        <!-- * for other app servers - check the docs --> 
        <fileset dir='${appserver.lib}'> 
            <include name='servlet*.jar' /> 
        </fileset> 
        <pathelement path='${build.dir}' /> 
    </path> 
    <target name='usage'> 
        <echo message='' /> 
        <echo message='${name} build file' /> 
        <echo message='-----------------------------------' /> 
        <echo message='' /> 
        <echo message='Available targets are:' /> 
        <echo message='' /> 
        <echo message='build --> Build the application' /> 
        <echo message='deploy --> Deploy application as directory' /> 
        <echo message='deploywar --> Deploy application as a WAR file' /> 
    	<echo message='resolve --> retrieve dependencies with ivy' />
        <echo message='' /> 
    </target>
	<target name="createDB_PostgreSQl">
	      <sql driver="${sql.driver}" 
	           url="${sql.url}" 
	           userid="${sql.user}" 
	           password="${sql.pass}"
	           src="db.sql">
	      	   <classpath refid="master-classpath"/>
		</sql>
	   </target>

	   <target name="dropDB_PostgreSQl">
	      <input message="Do you really want to delete this table (y/n)?" validargs="y,n" addproperty="do.delete" /> 
	      <condition property="do.abort"> 
	            <equals arg1="n" arg2="${do.delete}"/> 
	      </condition> 
	      <fail if="do.abort">Build aborted by user.</fail> 
	      <sql driver="${sql.driver}" url="${sql.url}" userid="${sql.user}" password="${sql.pass}" >
	           <classpath>
	            <pathelement location="postgresql-9.0-802.jdbc4.jar"/>
	           </classpath>  
	           drop database sample_project;
	      </sql>
	   </target>
	<target name="createTables_PostgreSQL">
	      <sql driver="${sql.driver}" url="${sql.url}" userid="${sql.user}" password="${sql.pass}" >
	      	   <classpath refid="master-classpath"/>
	           <transaction src="user.sql"/>
	      </sql>
	   </target>
    <target name='build' description='Compile main source tree java files'> 
        <mkdir dir='${build.dir}' /> 
        <javac destdir='${build.dir}' source='1.5' target='1.5' debug='true' 
            deprecation='false' optimize='false' failonerror='true'> 
            <src path='${src.dir}' /> 
            <classpath refid='master-classpath' /> 
        </javac> 
    </target>
	
	<target name="clean">
		<delete includeemptydirs="false">
			<fileset dir="build/" includes="**/**"/>
		</delete>
	</target>

    <target name='deploy' depends='build' description='Deploy application'> 
        <copy todir='${deploy.path}/${name}' preservelastmodified='true'> 
            <fileset dir='${web.dir}'> 
                <include name='**/*.*' /> 
            </fileset> 
        </copy> 
    </target>
	
	
	<target name="resolve" description="retrieve dependencies with ivy">
	        <ivy:retrieve />
	</target>
    
	<target name='deploywar' depends='build' 
        description='Deploy application as a WAR file'> 
        <war destfile='${name}.war' webxml='${web.dir}/WEB-INF/web.xml'> 
            <fileset dir='${web.dir}'> 
                <include name='**/*.*' /> 
            </fileset> 
        </war> 
        <copy todir='${deploy.path}' preservelastmodified='true'> 
            <fileset dir='.'> 
                <include name='*.war' /> 
            </fileset> 
        </copy> 
    </target> 
</project>

Exception is:

org.postgresql.util.PSQLException:ERROR: CREATE DATABASE can not be executed inside a transaction block