Runkang He created FLINK-30499:
----------------------------------

             Summary: over window codegen error when member code incorrectly 
used in method body
                 Key: FLINK-30499
                 URL: https://issues.apache.org/jira/browse/FLINK-30499
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Planner
    Affects Versions: 1.16.0
            Reporter: Runkang He


There is a bug in batch over window operator codegen, the comparator codegen 
logic is wrong that member code incorrectly used in method body. This causes 
over window code compile failed when operator initialization.

 

The incorrect generated code for RangeBoundComparator is below, and the wrong 
place is *private static final java.util.TimeZone timeZone = 
java.util.TimeZone.getTimeZone("Asia/Shanghai");*

which is a member statments that should be placed in class body, not method 
body.
{code:java}
      public class RangeBoundComparator$40 implements 
org.apache.flink.table.runtime.generated.RecordComparator {

        private final Object[] references;
        

        public RangeBoundComparator$40(Object[] references) {
          this.references = references;
          
          
        }

        @Override
        public int compare(org.apache.flink.table.data.RowData in1, 
org.apache.flink.table.data.RowData in2) {
          
                  org.apache.flink.table.data.TimestampData field$41;
                  boolean isNull$41;
                  org.apache.flink.table.data.TimestampData field$42;
                  boolean isNull$42;
                  isNull$41 = in1.isNullAt(0);
                  field$41 = null;
                  if (!isNull$41) {
                    field$41 = in1.getTimestamp(0, 3);
                  }
                  isNull$42 = in2.isNullAt(0);
                  field$42 = null;
                  if (!isNull$42) {
                    field$42 = in2.getTimestamp(0, 3);
                  }
                  if (isNull$41 && isNull$42) {
                     return 1;
                  } else if (isNull$41 || isNull$42) {
                     return -1;
                  } else {
                     
                            private static final java.util.TimeZone timeZone =
                                             
java.util.TimeZone.getTimeZone("Asia/Shanghai");
                            org.apache.flink.table.data.TimestampData result$43;
                            boolean isNull$43;
                            boolean isNull$44;
                            org.apache.flink.table.data.binary.BinaryStringData 
result$45;
                            boolean isNull$46;
                            long result$47;
                            org.apache.flink.table.data.TimestampData result$48;
                            boolean isNull$48;
                            boolean isNull$49;
                            org.apache.flink.table.data.binary.BinaryStringData 
result$50;
                            boolean isNull$51;
                            long result$52;
                            boolean isNull$53;
                            long result$54;
                            boolean isNull$55;
                            boolean result$56;
                            isNull$43 = 
(org.apache.flink.table.data.TimestampData) field$41 == null;
                            result$43 = null;
                            if (!isNull$43) {
                              result$43 = 
(org.apache.flink.table.data.TimestampData) field$41;
                            }
                            isNull$48 = 
(org.apache.flink.table.data.TimestampData) field$42 == null;
                            result$48 = null;
                            if (!isNull$48) {
                              result$48 = 
(org.apache.flink.table.data.TimestampData) field$42;
                            }
                            
                            
                            
                            
                            
                            isNull$44 = isNull$43;
                            result$45 = 
org.apache.flink.table.data.binary.BinaryStringData.EMPTY_UTF8;
                            
                            if (!isNull$44) {
                              
                              result$45 = 
org.apache.flink.table.data.binary.BinaryStringData.fromString(org.apache.flink.table.runtime.functions.SqlDateTimeUtils.timestampToString(result$43,
 6));
                              isNull$44 = (result$45 == null);
                            }
                            
                            isNull$46 = isNull$44;
                            result$47 = -1L;
                            
                            if (!isNull$46) {
                              
                              result$47 = 
                            
org.apache.flink.table.runtime.functions.SqlDateTimeUtils.unixTimestamp(result$45.toString(),
 timeZone)
                                       ;
                              
                            }
                            
                            
                            
                            
                            isNull$49 = isNull$48;
                            result$50 = 
org.apache.flink.table.data.binary.BinaryStringData.EMPTY_UTF8;
                            
                            if (!isNull$49) {
                              
                              result$50 = 
org.apache.flink.table.data.binary.BinaryStringData.fromString(org.apache.flink.table.runtime.functions.SqlDateTimeUtils.timestampToString(result$48,
 6));
                              isNull$49 = (result$50 == null);
                            }
                            
                            isNull$51 = isNull$49;
                            result$52 = -1L;
                            
                            if (!isNull$51) {
                              
                              result$52 = 
                            
org.apache.flink.table.runtime.functions.SqlDateTimeUtils.unixTimestamp(result$50.toString(),
 timeZone)
                                       ;
                              
                            }
                            
                            isNull$53 = isNull$46 || isNull$51;
                            result$54 = -1L;
                            
                            if (!isNull$53) {
                              
                              result$54 = (long) (result$47 - result$52);
                              
                            }
                            
                            
                            isNull$55 = isNull$53 || false;
                            result$56 = false;
                            
                            if (!isNull$55) {
                              
                              result$56 = result$54 >= ((int) -600000);
                              
                            }
                            
                            if (result$56) {
                              return 1;
                            } else {
                              return -1;
                            }
                          
                  }
               
        }
      }
       {code}



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