jinxing64 commented on a change in pull request #1521: [CALCITE-3429] Support
MAP type for JavaToSqlTypeConversionRules
URL: https://github.com/apache/calcite/pull/1521#discussion_r339323846
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File path:
core/src/main/java/org/apache/calcite/rel/type/RelDataTypeFactoryImpl.java
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@@ -603,6 +603,32 @@ public RelDataType getComponentType() {
}
}
+ /**
+ * For {@link JavaType} created with {@link Map} class,
+ * cannot get the type of key and value.
+ * Using ANY type as key type.
+ */
+ @Override public RelDataType getKeyType() {
+ if (Map.class.isAssignableFrom(clazz)) {
+ return createSqlType(SqlTypeName.ANY);
Review comment:
Say the map is by <Integer, Integer>
Why return SqlTypeName.ANY here ?
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