Danny Chan created FLINK-14092:
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             Summary: Upgrade Calcite version to 1.21 for Flink SQL
                 Key: FLINK-14092
                 URL: https://issues.apache.org/jira/browse/FLINK-14092
             Project: Flink
          Issue Type: Improvement
          Components: Table SQL / API
    Affects Versions: 1.9.0
            Reporter: Danny Chan
             Fix For: 1.10.0


Calcite 1.21 has been released recently, we need to upgrade to version 1.21 for 
these reasons:
 # Previously we have made some temp code to support full data types in sql 
parser, since CALCITE-3213 has been resolved, we can do some refactoring for 
these codes;
 # We also fixed some important bug for Join which bring in from Calcite 1.20 
join like expression promotion, such as CALCITE-3170, CALCITE-3171.
 # CALCITE-2302 has been resolved, there is possibility we support implicit 
type coercion for Flink now.



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