yanlin-Lynn commented on a change in pull request #1426: [CALCITE-3313]
Describe the end-user functionality of REGEXP_REPLACE
URL: https://github.com/apache/calcite/pull/1426#discussion_r321122343
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File path: core/src/main/java/org/apache/calcite/sql/SqlOperator.java
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@@ -192,8 +192,9 @@ public SqlOperandTypeChecker getOperandTypeChecker() {
* @return acceptable range
*/
public SqlOperandCountRange getOperandCountRange() {
- if (operandTypeChecker != null) {
- return operandTypeChecker.getOperandCountRange();
+ SqlOperandTypeChecker checker = getOperandTypeChecker();
Review comment:
In case the sub class of SqlOperator override the `getOperandTypeChecker`
function, but pass a null value of `operandTypeChecker` in constructor, use
`getOperandTypeChecker` function instead of access `operandTypeChecker`
directly.
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