Method addColumn

xutils/src/main/java/org/xutils/db/table/DbBase.java:77–92

(Class<?> entityType, String column)

    }

    @Override
    public void addColumn(Class<?> entityType, String column) throws DbException {
        TableEntity<?> table = this.getTable(entityType);
        ColumnEntity col = table.getColumnMap().get(column);
        if (col != null) {
            if (!table.tableIsExists()) return; // 不需要添加, 表创建时会自动添加
            StringBuilder builder = new StringBuilder();
            builder.append("ALTER TABLE ").append("\"").append(table.getName()).append("\"").
                    append(" ADD COLUMN ").append("\"").append(col.getName()).append("\"").
                    append(" ").append(col.getColumnDbType()).
                    append(" ").append(col.getProperty());
            execNonQuery(builder.toString());
        } else {
            throw new DbException("the column(" + column + ") is not defined in table: " + table.getName());
        }
    }

    protected void removeTable(Class<?> entityType) {
        synchronized (tableMap) {