tristaZero edited a comment on issue #4890: Add start-index and stop-index assertion for ConstraintDefinitionSegment URL: https://github.com/apache/incubator-shardingsphere/issues/4890#issuecomment-602191085 ### How to find the targets to be fixed? 1. Open class `ConstraintDefinitionAssert` and clear the following comments in `assertIs`. ``` // assertThat(assertContext.getText("Constraint definition start index assertion error: "), actual.getStartIndex(), is(expected.getStartIndex())); // assertThat(assertContext.getText("Constraint 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 `add-constraint` and `constraint-definition` segments of this `SQL`. 4. Add the calculated `start-index` and `stop-index` labels of `add-constraint` and `constraint-definition` segments to `parsing result` of this `SQL Case ID`, like ``` <constraint-definition start-index="10" stop-index="11" /> ``` 5. Add the correct `literal-start-index` and `literal-stop-index` of `literal-expression` segment to `parsing result` of this `SQL Case ID` when it is necessary, like ``` <constraint-definition value="init" 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 are the definitions of `constraint-definition` and `add-constraint`? For instance, here is a SQL, ``` CREATE TABLE t_order (order_id INT, user_id INT, status VARCHAR(10), column1 VARCHAR(10), column2 VARCHAR(10), column3 VARCHAR(10), CONSTRAINT pk_order_id PRIMARY KEY (order_id)) ``` The segment of `CONSTRAINT pk_order_id PRIMARY KEY (order_id))` is a `constraint-definition`. ``` ALTER TABLE t_order ADD CONSTRAINT pk_user_id PRIMARY KEY (user_id) ``` The segment of `ADD CONSTRAINT pk_user_id PRIMARY KEY (user_id)` is `add-constraint`. 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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