Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

[SPARK-43438][SQL] Error on missing input columns in INSERT #42393

Closed
wants to merge 17 commits into from

Conversation

MaxGekk
Copy link
Member

@MaxGekk MaxGekk commented Aug 8, 2023

What changes were proposed in this pull request?

In the PR, I propose to raise an error when an user uses V1 INSERT without a list of columns, and the number of inserting columns doesn't match to the number of actual table columns.

At the moment Spark inserts data successfully in such case after the PR #41262 which changed the behaviour of Spark 3.4.x.

Why are the changes needed?

  1. To conform the SQL standard which requires the number of columns must be the same:
    Screenshot 2023-08-07 at 11 01 27 AM

Apparently, the insertion below must not succeed:

spark-sql (default)> CREATE TABLE tabtest(c1 INT, c2 INT);
spark-sql (default)> INSERT INTO tabtest SELECT 1;
  1. To have the same behaviour as Spark 3.4:
spark-sql (default)> INSERT INTO tabtest SELECT 1;
`spark_catalog`.`default`.`tabtest` requires that the data to be inserted have the same number of columns as the target table: target table has 2 column(s) but the inserted data has 1 column(s), including 0 partition column(s) having constant value(s).

Does this PR introduce any user-facing change?

Yes.

After the changes:

spark-sql (default)> INSERT INTO tabtest SELECT 1;
[INSERT_COLUMN_ARITY_MISMATCH.NOT_ENOUGH_DATA_COLUMNS] Cannot write to `spark_catalog`.`default`.`tabtest`, the reason is not enough data columns:
Table columns: `c1`, `c2`.
Data columns: `1`.

How was this patch tested?

By running the modified tests:

$ build/sbt "test:testOnly *InsertSuite"
$ build/sbt "test:testOnly *ResolveDefaultColumnsSuite"
$ build/sbt -Phive "test:testOnly *HiveQuerySuite"

@MaxGekk MaxGekk changed the title [WIP][SPARK-43438][SQL] Error on missing input columns in INSERT [SPARK-43438][SQL] Error on missing input columns in INSERT Aug 29, 2023
@MaxGekk MaxGekk marked this pull request as ready for review August 29, 2023 07:28
@@ -1027,13 +1031,13 @@ class InsertSuite extends DataSourceTest with SharedSparkSession {
}
withTable("t") {
sql("create table t(i int, s bigint default 42, x bigint) using parquet")
sql("insert into t values(1)")
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

which Spark version added this test?

Copy link
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Added by #41262 which haven't been released yet.

Copy link
Contributor

@dtenedor dtenedor left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

LGTM, there's enough test coverage for INSERT commands with and without user-specified column lists, and with correct and incorrect numbers of attributes from the source table.

@MaxGekk
Copy link
Member Author

MaxGekk commented Aug 29, 2023

Merging to master/3.5. Thank you, @cloud-fan and @dtenedor for review.

@MaxGekk MaxGekk closed this in a7eef21 Aug 29, 2023
MaxGekk added a commit that referenced this pull request Aug 29, 2023
### What changes were proposed in this pull request?
In the PR, I propose to raise an error when an user uses V1 `INSERT` without a list of columns, and the number of inserting columns doesn't match to the number of actual table columns.

At the moment Spark inserts data successfully in such case after the PR #41262 which changed the behaviour of Spark 3.4.x.

### Why are the changes needed?
1. To conform the SQL standard which requires the number of columns must be the same:
![Screenshot 2023-08-07 at 11 01 27 AM](https://github.com/apache/spark/assets/1580697/c55badec-5716-490f-a83a-0bb6b22c84c7)

Apparently, the insertion below must not succeed:
```sql
spark-sql (default)> CREATE TABLE tabtest(c1 INT, c2 INT);
spark-sql (default)> INSERT INTO tabtest SELECT 1;
```

2. To have the same behaviour as **Spark 3.4**:
```sql
spark-sql (default)> INSERT INTO tabtest SELECT 1;
`spark_catalog`.`default`.`tabtest` requires that the data to be inserted have the same number of columns as the target table: target table has 2 column(s) but the inserted data has 1 column(s), including 0 partition column(s) having constant value(s).
```

### Does this PR introduce _any_ user-facing change?
Yes.

After the changes:
```sql
spark-sql (default)> INSERT INTO tabtest SELECT 1;
[INSERT_COLUMN_ARITY_MISMATCH.NOT_ENOUGH_DATA_COLUMNS] Cannot write to `spark_catalog`.`default`.`tabtest`, the reason is not enough data columns:
Table columns: `c1`, `c2`.
Data columns: `1`.
```

### How was this patch tested?
By running the modified tests:
```
$ build/sbt "test:testOnly *InsertSuite"
$ build/sbt "test:testOnly *ResolveDefaultColumnsSuite"
$ build/sbt -Phive "test:testOnly *HiveQuerySuite"
```

Closes #42393 from MaxGekk/fix-num-cols-insert.

Authored-by: Max Gekk <max.gekk@gmail.com>
Signed-off-by: Max Gekk <max.gekk@gmail.com>
(cherry picked from commit a7eef21)
Signed-off-by: Max Gekk <max.gekk@gmail.com>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
Projects
None yet
Development

Successfully merging this pull request may close these issues.

3 participants