Fix Bit Type default value bug

[marsishandsome]

What problem does this PR solve?

close #1147

see pingcap/tidb#12168

CREATE TABLE t_origin_default_value_1 (id bigint(20) NOT NULL, approved bit(8) NOT NULL DEFAULT b'11111111');
insert into t_origin_default_value_1(id) values (1), (2), (3);

CREATE TABLE t_origin_default_value_2 (id bigint(20) NOT NULL);
insert into t_origin_default_value_2(id) values (1), (2), (3);
alter table t_origin_default_value_2 add approved bit(8) NOT NULL DEFAULT b'11111111';

spark-sql> select * from t_origin_default_value_1;
1       255
2       255
3       255
Time taken: 0.144 seconds, Fetched 3 row(s)

spark-sql> select * from t_origin_default_value_2;                                                                      
19/10/15 10:49:14 ERROR SparkSQLDriver: Failed in [select * from t_origin_default_value_2]                              
java.lang.NumberFormatException: For input string: "�"                                                                  
        at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)                                
        at java.lang.Long.parseLong(Long.java:589)                                                                      
        at java.lang.Long.parseLong(Long.java:631)                                                                      
        at com.pingcap.tikv.types.IntegerType.getOriginDefaultValueNonNull(IntegerType.java:157)                        
        at com.pingcap.tikv.types.DataType.getOriginDefaultValue(DataType.java:327)                                     
        at com.pingcap.tikv.meta.TiColumnInfo.getOriginDefaultValueAsByteString(TiColumnInfo.java:192)                  
        at com.pingcap.tikv.meta.TiColumnInfo.toProtoBuilder(TiColumnInfo.java:315)                                     
        at com.pingcap.tikv.meta.TiColumnInfo.toProto(TiColumnInfo.java:304)                                            
        at com.pingcap.tikv.meta.TiDAGRequest.buildScan(TiDAGRequest.java:427)                                          
        at com.pingcap.tikv.meta.TiDAGRequest.buildTableScan(TiDAGRequest.java:276)                                     
        at com.pingcap.tikv.meta.TiDAGRequest.init(TiDAGRequest.java:969)                                               
        at com.pingcap.tikv.meta.TiDAGRequest.init(TiDAGRequest.java:974)                                               
        at com.pingcap.tikv.meta.TiDAGRequest.toString(TiDAGRequest.java:997)                                           
        at java.lang.String.valueOf(String.java:2994)      
        at java.lang.StringBuilder.append(StringBuilder.java:131) 

What is changed and how it works?

use defaultValueBit instead of originDefaultValue for Bit Type

Check List

Tests

• Unit test

Related changes

• Need to cherry-pick to the release branch
• Need to be included in the release note

[marsishandsome]

/run-all-tests

[marsishandsome]

/run-all-tests tikv=v3.0.4 tidb=v3.0.4 pd=v3.0.4

[marsishandsome]

/run-all-tests tikv=v2.1.17 tidb=v2.1.17 pd=v2.1.17

[birdstorm]

LGTM after resolving comments

[marsishandsome]

/run-all-tests tikv=v2.1.17 tidb=v2.1.17 pd=v2.1.17

[marsishandsome]

/run-all-tests tikv=v2.1.17 tidb=v2.1.17 pd=v2.1.17