[TINKERPOP-2856] math() step fails if variable name contains a keyword

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 3.5.4
• Fix Version/s: 3.7.0, 3.6.3, 3.5.6
• Component/s: process
• Environment: Any Gremlin version that has the math() step. Reproduced on 3.6.0
• Assignee: Stephen Mallette
• Reporter: Kelvin Lawrence
• Created: 18/Jan/23 19:55
• Updated: 07/Apr/23 02:40
• Resolved: 07/Apr/23 02:40

Description

As reported on StackOverflow if a variable used as part of the math() step contains a reserved word such as "exp" the evaluation of the expression fails. For example

 

math('number1-expected_value').next()

results in

*GremlinServerError: 499: {"detailedMessage":"Unknown function or variable 'cted_value' at pos 20 in expression 'number1 - expected_value'","requestId":"01e3f9e6-3cf2-4af0-bf94-5a4979d488b4","code":"InvalidParameterException"}*

I am able to reproduce this in the Gremlin Console using TinkerPop version 3.6.0 using:{}

gremlin> g.inject(1).as('expa').constant(2).as('c').math('c - expa')
Unknown function or variable 'a' at pos 7 in expression 'c - expa'
Type ':help' or ':h' for help.
Display stack trace? [yN]

gremlin> g.inject(1).as('a').constant(2).as('c').math('c - a')
==>1.0