tristaZero edited a comment on issue #4853: Add start-index and stop-index assertion for `ColumnDefinitionSegment` URL: https://github.com/apache/incubator-shardingsphere/issues/4853#issuecomment-601120579 This issue is to count the `start-index` and `stop-index` to assert `ColumnDefinitionSegment ` ### How to find the targets to be fixed? 1. Open class `ColumnDefinitionAssert` and clear the comment of ``` assertThat(assertContext.getText("Column definition start index assertion error: "), actual.getStartIndex(), is(expected.getStartIndex())); assertThat(assertContext.getText("Column definition stop index assertion error: "), actual.getStopIndex(), is(expected.getStopIndex())); } ``` 2. run `SQLParserParameterizedTest` 3. All the SQL cases which have the error assertion results are our targets to be fixed. ### How to fix the above assertion results? 1. Look at the exception log and find the corresponding `SQL Case ID` and `SQL`. 2. Find out the `parsing result` of this `SQL Case ID` in `./incubator-shardingsphere/shardingsphere-sql-parser/shardingsphere-sql-parser-test/src/test/resources/sql/dml` 3. Calculate the correct `start-index` and `stop-index` of ` ColumnDefinitionSegment` segment of this `SQL`. 4. Add the calculated `start-index` and `stop-index` labels of `ColumnDefinitionSegment` segment to `parsing result` of this `SQL Case ID`, like ``` <column-definition type="int" primary-key="true" start-index="10" stop-index="11" /> ``` 5. Add the correct `literal-start-index` and `literal-stop-index` of `ColumnDefinitionSegment` segment to `parsing result` of this `SQL Case ID` when it is necessary, like ``` <column-definition type="int" primary-key="true" literal-start-index="10" literal-stop-index="11" /> ``` 6. Run `SQLParserParameterizedTest` again to check whether this `SQL Case ID` does not stay in the list of `SQL` with `bad assertion result`. ### Note 1. What is the definition of `ColumnDefinitionSegment` segment? For instance, here is a SQL, > CREATE TABLE t_log(id int PRIMARY KEY, status varchar(10)) The segment of `id int PRIMARY KEY` or `status varchar(10)` is a `ColumnDefinitionSegment `, which defines a column. 2. What is the difference between `literal-start-index` and `start-index`? When a SQL does not contain parameter maker, i.e.,`?`, this SQL only has one form; Otherwise, you will see two forms of this SQL, i.e, a SQL form filled with parameter and a SQL form only with parameter marks. For instance, ``` Case1 One SQL without parameter mark, select * from table where id = 1; Case2 One SQL with parameter mark, Original SQL: select * from table where id = ?; SQL filled with Parameter: select * from table where id = 1; ``` Replace `the parameter mark` with `the actual parameter` will change the position of the segment. Therefore we need to add `start-index` to represent the start position of a segment for `Original SQL`, and `literal-start-index` is used to represent the start position of a segment for `SQL filled with Parameter`.
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