JiajunBernoulli opened a new pull request #2615:
URL: https://github.com/apache/calcite/pull/2615
# insert union case
Here is the sql:
```
insert into t3
select 'a', 1.0, 1 union
select 'b', 2, 2 union
select 'c', 3.0, CAST(3 AS SMALLINT) union
select 'd', 4.0, 4 union
select 'e', 5.0, 5
```
but the validated sql is :
```
INSERT INTO `CATALOG`.`SALES`.`T3`
SELECT 'a', CAST(1.0 AS INTEGER), CAST(1 AS SMALLINT) UNION
SELECT 'b', 2, CAST(2 AS SMALLINT) UNION -- Encountered an integer and ended
early
SELECT 'c', 3.0, CAST(3 AS SMALLINT) UNION -- Encountered an samlint and
ended early
SELECT 'd', 4.0, 4 UNION -- should be cast
SELECT 'e', 5.0, 5 -- should be cast
```
This is why CALCITE-4458 changed '&&' to '||', the right validated sql is:
```
INSERT INTO `CATALOG`.`SALES`.`T3`
SELECT 'a', CAST(1.0 AS INTEGER), CAST(1 AS SMALLINT)
UNION
SELECT 'b', 2, CAST(2 AS SMALLINT)
UNION
SELECT 'c', CAST(3.0 AS INTEGER), CAST(3 AS SMALLINT)
UNION
SELECT 'd', CAST(4.0 AS INTEGER), CAST(4 AS SMALLINT)
UNION
SELECT 'e', CAST(5.0 AS INTEGER), CAST(5 AS SMALLINT)
```
# case2
Here is the sql
```
INSERT INTO `CATALOG`.`SALES`.`T3`
SELECT 'a', CAST(1.0 AS INTEGER), CAST(1 AS SMALLINT)
UNION
SELECT 'b', 2, CAST(2 AS SMALLINT)
UNION
SELECT 'c', 3.0, CAST(3 AS SMALLINT)
UNION
SELECT 'd', 4.0, 4
UNION
SELECT 'e', 5.0, 5
```
the validated sql is :
```
INSERT INTO `CATALOG`.`SALES`.`T3`
VALUES ROW('a', CAST(1.0 AS INTEGER), CAST(1 AS SMALLINT)),
ROW('b', 2, CAST(2 AS SMALLINT)),-- Encountered an integer and ended early
ROW('c', 3.0, CAST(3 AS SMALLINT)),Encountered an samllint and ended early
ROW('d', 4.0, 4),
ROW('e', 5.0, 5)
```
the right validated sql is:
```
INSERT INTO `CATALOG`.`SALES`.`T3`
SELECT 'a', CAST(1.0 AS INTEGER), CAST(1 AS SMALLINT)
UNION
SELECT 'b', 2, CAST(2 AS SMALLINT)
UNION
SELECT 'c', CAST(3.0 AS INTEGER), CAST(3 AS SMALLINT)
UNION
SELECT 'd', CAST(4.0 AS INTEGER), CAST(4 AS SMALLINT)
UNION
SELECT 'e', CAST(5.0 AS INTEGER), CAST(5 AS SMALLINT)
```
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