Dear group,
While investigating how to parse queries like this (all page/chapter
references refer to EDR 2.1, Dec 19th, 2011):
SELECT p
FROM Person p, in(pc.firstnames) n
WHERE n = 'Joe'
(firstnames is a List<String>)
I came across the following example provided in the spec, which is related
in structure:
section 4.4.4, p. 153:
SELECT i.name, VALUE(p)
FROM Item i JOIN i.photos p
WHERE KEY(p) LIKE ‘%egret’
I looked at the BNF how this is parsed, and did not find any derivation for
the FROM clause:
where_clause ::= WHERE conditional_expression
conditional_expression ::= conditional_term
conditional_term ::= conditional_factor
conditional_factor ::= conditional_primary
conditional_primary ::= simple_cond_expression
simple_cond_expression ::= like_expression
like_expression ::= string_expression LIKE pattern_value
So eventually I end up with 'string_expression', from which I can not
derive a 'qualified_identification_variable'
string_expression ::=
state_field_path_expression |
string_literal |
input_parameter |
functions_returning_strings |
aggregate_expression |
case_expression |
function_invocation |
(subquery)
Did I miss something, or is there actually a rule missing in the grammar
for this?
Thank you!
Christian
--
Christian Romberg
Chief Engineer | Versant GmbH
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(F) +49 40 60990-113
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