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    copied!<p>Do that at compile time: sounds like job for maven <a href="http://maven.apache.org/plugins/maven-resources-plugin/examples/filter.html" rel="nofollow">filters</a> and/or <a href="http://maven.apache.org/guides/introduction/introduction-to-profiles.html" rel="nofollow">profiles</a> </p> <p>NOTE: be carefull with liquibase and any "marker" replacements... liquibase stores CRC of applied changessets</p> <p>pom.xml</p> <pre><code>&lt;project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"&gt; &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt; &lt;groupId&gt;test&lt;/groupId&gt; &lt;artifactId&gt;test&lt;/artifactId&gt; &lt;version&gt;0.0.1-SNAPSHOT&lt;/version&gt; &lt;build&gt; &lt;filters&gt; &lt;filter&gt;src/main/filters/liquibase.properties&lt;/filter&gt; &lt;/filters&gt; &lt;resources&gt; &lt;resource&gt; &lt;directory&gt;src/main/resources&lt;/directory&gt; &lt;filtering&gt;true&lt;/filtering&gt; &lt;includes&gt; &lt;include&gt;liquibase.xml&lt;/include&gt; &lt;/includes&gt; &lt;/resource&gt; &lt;/resources&gt; &lt;/build&gt; &lt;/project&gt; </code></pre> <p>/src/main/filters/liquibase.properties</p> <pre><code>table.name=TABLE_NAME column1.name=COLUMN1_NAME column1.length=10 column2.name=COLUMN2_NAME </code></pre> <p>/src/main/resources/liquibase.xml</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8" standalone="no"?&gt; &lt;databaseChangeLog logicalFilePath="liquibase.xml" xmlns="http://www.liquibase.org/xml/ns/dbchangelog" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-2.0.xsd"&gt; &lt;changeSet author="me" id="changeSetId1"&gt; &lt;comment&gt;Test&lt;/comment&gt; &lt;createTable tableName="${table.name}"&gt; &lt;column name="id" type="int" /&gt; &lt;column name="${column1.name}" type="varchar(${column1.length})" /&gt; &lt;column name="${column2.name}" type="int" /&gt; &lt;/createTable&gt; &lt;/changeSet&gt; &lt;/databaseChangeLog&gt; </code></pre> <p>EDIT: A <a href="http://www.liquibase.org/documentation/maven/" rel="nofollow">typical</a> invocation (using <a href="http://maven.apache.org/guides/getting-started/index.html#How_do_I_filter_resource_files" rel="nofollow">filtered</a> resources) would look like this: <code>mvn resources:resources liquibase:update</code> or more preferably use profiles... <code>mvn resources:resources liquibase:update -P&lt;profile_name&gt;</code></p> <p>EDIT2: There is one big advantage of this way of defining columns. You could use this property's (e.g.: column1.length) value (e.g.: 10) for validation of <b>every</b> layer: Hibernate, DAO, WEB, faces, JavaScript. Just use this property at each place where you need to validate against it. Even in i18n/messages.properties if needed (e.g.: input1.validation=No more than ${column1.length} letters.). </p> <p>The only complication is that if you need to change this value you need to provide proper liquibase update/rollback script. Sometimes it is possible to change value and set new liquibase checksum (safe operation like increase varchar length), but other times you need to create a <i>safe</i> update changescript using new property/value.</p>
 

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