equal
deleted
inserted
replaced
9 The terminal elements are in capital letters, non-terminal in lowercase. |
9 The terminal elements are in capital letters, non-terminal in lowercase. |
10 The value of the terminal elements (between quotes) is a Python regular |
10 The value of the terminal elements (between quotes) is a Python regular |
11 expression. |
11 expression. |
12 :: |
12 :: |
13 |
13 |
14 statement:: = (select | delete | insert | update) ';' |
14 statement ::= (select | delete | insert | update) ';' |
15 |
15 |
16 |
16 |
17 # select specific rules |
17 # select specific rules |
18 select ::= 'DISTINCT'? E_TYPE selected_terms restriction? group? sort? |
18 select ::= 'DISTINCT'? E_TYPE selected_terms restriction? group? sort? |
19 |
19 |
128 |
128 |
129 - The current implementation does not support linking two relations of type 'is' |
129 - The current implementation does not support linking two relations of type 'is' |
130 with an OR. I do not think that the negation is supported on this type of |
130 with an OR. I do not think that the negation is supported on this type of |
131 relation (XXX to be confirmed). |
131 relation (XXX to be confirmed). |
132 |
132 |
133 - Relations defining the variables must be left to those using them. For |
133 - missing COALESCE and certainly other things... |
134 example:: |
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135 |
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136 Point P where P abs X, P ord Y, P value X+Y |
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137 |
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138 is valid, but:: |
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139 |
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140 Point P where P abs X, P value X+Y, P ord Y |
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141 |
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142 is not. |
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143 |
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144 - missing proper explicit type conversion, COALESCE and certainly other things... |
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145 |
134 |
146 - writing an rql query requires knowledge of the used schema (with real relation |
135 - writing an rql query requires knowledge of the used schema (with real relation |
147 names and entities, not those viewed in the user interface). On the other |
136 names and entities, not those viewed in the user interface). On the other |
148 hand, we cannot really bypass that, and it is the job of a user interface to |
137 hand, we cannot really bypass that, and it is the job of a user interface to |
149 hide the RQL. |
138 hide the RQL. |