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Free database schema discovery and comprehension tool

SchemaCrawler Database Scripting

SchemaCrawler is a command-line tool that allows you to script against your database, using JavaScript, Groovy, Ruby or Python. (SchemaCrawler supports any scripting language supported on the JDK.) Database meta-data is provided to your script, as the “database” object, and you can use any of the API methods to obtain details about your schema. A live database connection is provided to your script as the “connection” object. You can use standard JDBC to script against the database.

For more details, see scripting example in the SchemaCrawler examples download, in the examples\javascript, examples\groovy, examples\ruby and examples\python directories.

An hypothetical example of SchemaCrawler JavaScript support is in the following script, which attempts to drop all the tables in the database.

var dropTables = function()
  var statement = connection.createStatement();
  var tables = catalog.tables.toArray();
  for ( var i = (tables.length - 1); i >= 0; i--)
    var table = tables[i];
    var sql = "DROP " + table.type + " " + table.fullName;
    println("Executing SQL: " + sql);
    } catch (e)
      println("(Not dropping any more tables, due to exception)");


Note: SchemaCrawler’s scripting and templating functionality allows the execution of arbitrary scripts or templates. It is recommended not to distribute the SchemaCrawler scripting jar file in production, unless you have an explicit need for this functionality. Do not include this dependency in your SchemaCrawler project unless you need it.