spark-instrumented-optimizer/sql/catalyst/src
Maxim Gekk 8aebc80e0e [SPARK-30625][SQL] Support escape as third parameter of the like function
### What changes were proposed in this pull request?
In the PR, I propose to transform the `Like` expression to `TernaryExpression`, and add third parameter `escape`. So, the `like` function will have feature parity with `LIKE ... ESCAPE` syntax supported by 187f3c1773.

### Why are the changes needed?
The `like` functions can be called with 2 or 3 parameters, and functionally equivalent to `LIKE` and `LIKE ... ESCAPE` SQL expressions.

### Does this PR introduce any user-facing change?
Yes, before `like` fails with the exception:
```sql
spark-sql> SELECT like('_Apache Spark_', '__%Spark__', '_');
Error in query: Invalid number of arguments for function like. Expected: 2; Found: 3; line 1 pos 7
```
After:
```sql
spark-sql> SELECT like('_Apache Spark_', '__%Spark__', '_');
true
```

### How was this patch tested?
- Add new example for the `like` function which is checked by `SQLQuerySuite`
- Run `RegexpExpressionsSuite` and `ExpressionParserSuite`.

Closes #27355 from MaxGekk/like-3-args.

Authored-by: Maxim Gekk <max.gekk@gmail.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>
2020-01-27 11:19:32 -08:00
..
main [SPARK-30625][SQL] Support escape as third parameter of the like function 2020-01-27 11:19:32 -08:00
test [SPARK-30633][SQL] Append L to seed when type is LongType 2020-01-27 10:32:15 -08:00