错误：SQL问题：错误：运算符不存在：日期> =字符变化

Question

我将iReport 3.6.0与postgresql数据库一起使用，对于日期类型参数，当写查询“ Error：SQL Problems：ERROR：operator not exist：date> = character different”时，它给出以下错误，请帮助

Answer 1

There should be datefield >= textfield::date. I think that there would be comparing two date fields not two textfields so the datefield::text >= textfield would be rather wrong.

Answer 2

强制转换功能也有帮助：

cast(date_trunc('year', current_date) as text)

Answer 3

See PostgreSQL 8.3 Release Notes for explanation and workaround. You should use

datefield::text>=textfield