Comparison error in roots

[junknown]

Roots elements in predicates of types 'comparison' ( like where a.prop>2) shows only the first argument ( a.prop).

To replicate try to parse

MATCH (n)--(friend)
    WHERE n.age > 3
    RETURN n

it reports as roots:

[ { type: 'statement',
body:
{ type: 'query',
clauses:
[ { type: 'match',
optional: false,
pattern:
{ type: 'pattern',
paths:
[ { type: 'pattern-path',
elements:
[ { type: 'node-pattern',
identifier: { type: 'identifier', name: 'n' },
labels: [] },
{ type: 'rel-pattern', direction: 2, reltypes: [] },
{ type: 'node-pattern',
identifier: { type: 'identifier', name: 'friend' },
labels: [] } ] } ] },
hints: [],
predicate:
{ type: 'comparison',
length: 1,
ops: [ 'greater-than' ],
args:
[ { type: 'property-operator',
expression: { type: 'identifier', name: 'n' },
propName: { type: 'prop-name', value: 'age' } } ] } },
{ type: 'return',
distinct: false,
includeExisting: false,
projections:
[ { type: 'projection',
expression: { type: 'identifier', name: 'n' } } ] } ],
options: [] },
options: [] } ]

[Loupi]

Thank you for the detailed info, it allowed me to spot the error quickly.

In parser.cpp, line 920 looks like:
LoopNodes("args", cypher_ast_comparison_get_length(node), cypher_ast_comparison_get_argument);
In fact, it should be:
LoopNodes("args", cypher_ast_comparison_get_length(node) + 1, cypher_ast_comparison_get_argument);

A fix is coming.

[Loupi]

#7

[Loupi]

https://github.com/Loupi/node-cypher-parser/releases/tag/0.1.1

[junknown]

Thanks!