caicancai commented on code in PR #3705:
URL: https://github.com/apache/calcite/pull/3705#discussion_r1506171264
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core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorUtil.java:
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@@ -1326,6 +1327,34 @@ public static void adjustTypeForArrayConstructor(
}
}
+ /**
+ * When the array_append and array_prepend element does not equal the array
component type
+ * make explicit casting.
+ *
+ * @param componentType derived array component type
+ * @param opBinding description of call
+ */
+ public static void adjustTypeForArrayAppendPrependConstructor(
+ RelDataType componentType, RelDataType elementType, SqlOperatorBinding
opBinding) {
+ if (opBinding instanceof SqlCallBinding) {
+ requireNonNull(componentType, "array component type");
+ switch (elementType.getSqlTypeName().getName()) {
+ case "DOUBLE":
+ case "FLOAT":
+ case "BIGINT":
+ adjustTypeForMultisetConstructor3(
+ elementType, elementType, (SqlCallBinding) opBinding);
+ break;
+ default:
+ if (!componentType.getSqlTypeName().getName().equals("UNKNOWN")) {
Review Comment:
If it is an unknown type, no conversion is required.
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