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normalize_joins

polyglot_sql::optimizer::optimize_joins

Function normalize_joins 

Source 
pub fn normalize_joins(expression: Expression) -> Expression
Expand description

Normalize join syntax by removing unnecessary keywords.

  • Remove INNER keyword (it’s the default for joins with ON clause)
  • Remove OUTER keyword (only LEFT/RIGHT/FULL matter)
  • Add CROSS keyword to joins without any join type
  • Add TRUE to joins without ON or USING clause