Fixed "*DB.Raw()" bug where single or double quotes containing '@' were incorrectly identified as named variables

[Rankgice]

• [*] Do only one thing
• [*] Non breaking API changes
• [*] Tested

What did this pull request do?

Fixed "*DB.Raw()" has a bug where single or double quotes containing '@' are incorrectly recognized as named variables.
When I call the Raw method, if the SQL contains a quote wrapped @, then this @ will not be treated as part of the string, but as a named parameter. I have increased the judgment of quotation marks to ensure that the content inside the quotation marks will not be recognized as distinctive symbols.

User Case Description

Values

values := map[string]interface{}{
	"email": `%qq.com`,
}

Origin

select * from users where email like @email and name = "@email"

Result

D:/go/src/runtime/proc.go:271 sql: expected 1 arguments, got 2
[21.008ms] [rows:-] select * from users where email like '%qq.com' and name = "'%qq.com'"

After repair

Result

D:/go/src/runtime/proc.go:271
[29.642ms] [rows:0] select * from users where email like '%qq.com' and name = "@email"

[Rankgice]

The failure of this test seems to be due to an issue with the test image container. I noticed that other PRs have also encountered the same problem as me.

[jinzhu]

Hi, can you add some tests?

[Rankgice]

Hi, can you add some tests?

Hello, of course not a problem. I will add some tests later

[Rankgice]

Hi, can you add some tests?

I have added some test cases. May I proceed with the next review