The optional where clause is analogous to a rule’s conditions. The expression in the where clause can be simple or complex. In the where clause you can use following:
● Entities that are declared in the from clausewhere A.id = B@extid // Entity attributesand A.tokens[5] = 50 // array property
The pound sign (#) is used to escape reserved (key) words. See Reserved Words for a complete listing.
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