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collect_pattern_variables

risingwave_frontend::binder::relation::match_recognize

Function collect_pattern_variables 

Source 
fn collect_pattern_variables(
    pattern: &MatchRecognizePattern,
    symbols: &[SymbolDefinition],
) -> Vec<String>
Expand description

Collect the distinct pattern-variable names appearing in a pattern, unioned with the DEFINE symbols. The union is defensive: bind_match_recognize rejects any DEFINE symbol absent from the pattern before this runs, so the two sets are equal there.