[BUG] eval returns integer division result instead of decimal

[penghuo]

What is the bug?
A clear and concise description of the bug.

How can one reproduce the bug?
The value of v is returned as 0

source=test002 | eval v=5/10

What is the expected behavior?
The expected result is:

v = 0.5

What is your host/environment?

• OS: [e.g. iOS]
• Version [e.g. 22], 3.1
• Plugins, SQL

Do you have any screenshots?
n/a

Do you have any additional context?
n/a

[LantaoJin]

In most database, 5/10 should return 0 instead of 0.5. User should change to 5.0/10 or 5d/10 for example.