parser error in lookup sentence

[cangfengzhs]

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Describe the bug (must be provided)

(root@nebula) [t2]>  lookup on t where t.height<-1.0;
[ERROR (-1004)]: SyntaxError: syntax error near `<-'

(root@nebula) [t2]>  lookup on t where t.height< -1.0;
+----------+
| VertexID |
+----------+
+----------+

The second one has one space between < and -
A clear and concise description of what the bug is.

Your Environments (must be provided)

• OS: uname -a
• Compliler: g++ --version or clang++ --version
• CPU: lscpu
• Commit id (e.g. a3ffc7d8)

How To Reproduce(must be provided)

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2. Step 2
3. Step 3

Expected behavior

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Additional context

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[Shylock-Hg]

It's not a bug but a syntax error. <- is the symbol of match pattern, so should add space between less than and negative number.

[cangfengzhs]

It's not a bug but a syntax error. <- is the symbol of match pattern, so should add space between less than and negative number.

Maybe there is any way to resolve this grammatical ambiguity

[CPWstatic]

As said by @Shylock-Hg , it is a syntax error indeed.