@Override
    public Set<String> getColumnNames(String tableName) {
        return getSQLHandler().getItemsAsStringSet("select COLUMN_NAME from "
          + "INFORMATION_SCHEMA.COLUMNS where TABLE_NAME = '" + tableName
          + "' AND TABLE_SCHEMA = '" + getSchemaName() + "'");
    }
Gets the names of all columns of the given table.

@param tableName The table, not null
@return The names of the columns of the table with the given name
spock-unitils/src/test/java/org/unitils/core/dbsupport/H2DbSupport.java