asereda-gs commented on a change in pull request #2657:
URL: https://github.com/apache/calcite/pull/2657#discussion_r785276009
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File path:
elasticsearch/src/main/java/org/apache/calcite/adapter/elasticsearch/ElasticsearchMapping.java
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@@ -102,19 +105,28 @@ String index() {
private static final JsonNodeFactory FACTORY = JsonNodeFactory.instance;
// pre-cache missing values
- private static final Set<JsonNode> MISSING_VALUES =
+ private static final Set<JsonNode> MIN_MISSING_VALUES =
Stream.of("string", // for ES2
"text", "keyword",
"date", "long", "integer", "double", "float")
- .map(Datatype::missingValueForType)
+ .map(Datatype::minMissingValueForType)
+ .collect(Collectors.toSet());
+
+ private static final Set<JsonNode> MAX_MISSING_VALUES =
Review comment:
But how min/max missing string value will be sorted ? I assume it also
needs two values for nulls last/first ?
Should it be empty string `""` (for min) and `zzzzzz` (for max) ?
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