caicancai commented on code in PR #3705:
URL: https://github.com/apache/calcite/pull/3705#discussion_r1506173209
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core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorUtil.java:
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@@ -1398,6 +1471,28 @@ private static SqlNode castTo(SqlNode node, RelDataType
type) {
SqlTypeUtil.convertTypeToSpec(type).withNullable(type.isNullable()));
}
+ /**
+ * Creates a CAST operation that converts the given Array in {@link SqlNode}
to the specified {@link RelDataType}.
+ * This method uses the {@link SqlStdOperatorTable#CAST} operator to create
a new {@link SqlCall}
+ * node representing a CAST operation. The original 'node' is cast to the
desired 'type',
+ * preserving the nullability of the 'type'.
+ *
+ * @param node the {@link SqlNode} which is to be cast
+ * @param type the target {@link RelDataType} to which 'node' should be cast
+ * @return a new {@link SqlNode} representing the CAST operation
+ */
+ private static SqlNode arrayToCast(SqlNode node, RelDataType type) {
Review Comment:
In order to convert the types in the array to the same type as elementType
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