Method isMinusSetOp

pkg/sql/parser/select_set_ops.go:99–108

isMinusSetOp returns true if the current token is the Snowflake / Oracle MINUS keyword used as a set operator (synonym for EXCEPT). MINUS tokenizes as an identifier; gate by dialect so that MINUS as a legitimate column alias in other dialects is not hijacked.

()

// as an identifier; gate by dialect so that MINUS as a legitimate column
// alias in other dialects is not hijacked.
func (p *Parser) isMinusSetOp() bool {
	if p.dialect != string(keywords.DialectSnowflake) &&
		p.dialect != string(keywords.DialectOracle) {
		return false
	}
	if !p.isIdentifier() {
		return false
	}
	return strings.EqualFold(p.currentToken.Token.Value, "MINUS")
}