/**
* Validates this node in an expression context.
*
* <p>Usually, this method does much the same as {@link #validate}, but a {@link SqlIdentifier}
* can occur in expression and non-expression contexts.
*/
public void validateExpr(SqlValidator validator, SqlValidatorScope scope) {
validate(validator, scope);
Util.discard(validator.deriveType(scope, this));
}
public String getSignatureTemplate(final int operandsCount) {
Util.discard(operandsCount);
return "{1} {0} {2} AND {3}";
}