danny0405 commented on a change in pull request #2025:
URL: https://github.com/apache/calcite/pull/2025#discussion_r439913573
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File path: core/src/main/java/org/apache/calcite/sql/SqlCall.java
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@@ -97,7 +97,13 @@ public void unparse(
if (leftPrec > operator.getLeftPrec()
|| (operator.getRightPrec() <= rightPrec && (rightPrec != 0))
|| writer.isAlwaysUseParentheses() && isA(SqlKind.EXPRESSION)) {
- final SqlWriter.Frame frame = writer.startList("(", ")");
+ final SqlWriter.Frame frame;
+ if (operator instanceof SqlUnnestOperator) {
+ frame = writer.startList(SqlWriter.FrameTypeEnum.SIMPLE);
+ } else {
Review comment:
Use `SqlKind.UNNEST` instead of `instanceOf`.
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