Rong Rong created FLINK-7137: -------------------------------- Summary: Flink table API defaults top level fields as nullable and all nested fields within CompositeType as non-nullable Key: FLINK-7137 URL: https://issues.apache.org/jira/browse/FLINK-7137 Project: Flink Issue Type: Bug Affects Versions: 1.3.1 Reporter: Rong Rong
Right now FlinkTypeFactory does conversion between Flink TypeInformation to Calcite RelDataType by assuming the following: All top level fields will be set to nullable and all nested fields within CompositeRelDataType and GenericRelDataType will be set to Calcite default (which is non-nullable). This triggers Calcite SQL optimization engine drop all `IS NOT NULL` clause on nested fields, and would not be able to optimize when top level fields were actually non-nullable. -- This message was sent by Atlassian JIRA (v6.4.14#64029)