QueryDSL:如何选择文字作为 SQLSubQuery 的一部分? [英] QueryDSL: How to SELECT literals as part of a SQLSubQuery?
问题描述
如何使用 QueryDSL SQL 实现 https://stackoverflow.com/a/16392399/14731?>
我明白
<块引用>new SQLSubQuery().from(customer).where(customer.email.eq("foo@example.com"))
模型
<块引用>select customer where customer.email = 'foo@example.com'
但我不明白如何选择[文字]，例如:
select 1 from customer 或选择'foo@example.com', 0
根据上述链接的要求.
如果可以使用参数，那么使用常量应该可以
new SQLSubQuery().from(customer).where(customer.email.eq("foo@example.com")).list(Expressions.constant("foo@example.com"),表达式.常量(0))Expressions.constant 记录在此处 http://www.querydsl.com/static/querydsl/3.2.3/apidocs/com/mysema/query/support/Expressions.html#constant%28T%29
How do I implement https://stackoverflow.com/a/16392399/14731 using QueryDSL SQL?
I understand that
new SQLSubQuery().from(customer).where(customer.email.eq("foo@example.com"))
models
select customer where customer.email = 'foo@example.com'
but I don't understand how to select [literal] such as:
select 1 from customer or
select 'foo@example.com', 0
as required by the aforementioned link.
If it is ok to use parameters then using constants should work
new SQLSubQuery().from(customer)
.where(customer.email.eq("foo@example.com"))
.list(Expressions.constant("foo@example.com"),
Expressions.constant(0))
Expressions.constant is documented here http://www.querydsl.com/static/querydsl/3.2.3/apidocs/com/mysema/query/support/Expressions.html#constant%28T%29
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