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| author | Wenchen Fan <wenchen@databricks.com> | 2016-03-16 10:52:36 -0700 |
|---|---|---|
| committer | Reynold Xin <rxin@databricks.com> | 2016-03-16 10:52:36 -0700 |
| commit | d9e8f26d0334f393e3b02d7a3b607be54a2a5efe (patch) | |
| tree | 9790f502141132cf03c860411031f59cacd366ae /mllib | |
| parent | eacd9d8eda68260bbda7b0cd07410321dffaf428 (diff) | |
| download | spark-d9e8f26d0334f393e3b02d7a3b607be54a2a5efe.tar.gz spark-d9e8f26d0334f393e3b02d7a3b607be54a2a5efe.tar.bz2 spark-d9e8f26d0334f393e3b02d7a3b607be54a2a5efe.zip | |
[SPARK-13924][SQL] officially support multi-insert
## What changes were proposed in this pull request?
There is a feature of hive SQL called multi-insert. For example:
```
FROM src
INSERT OVERWRITE TABLE dest1
SELECT key + 1
INSERT OVERWRITE TABLE dest2
SELECT key WHERE key > 2
INSERT OVERWRITE TABLE dest3
SELECT col EXPLODE(arr) exp AS col
...
```
We partially support it currently, with some limitations: 1) WHERE can't reference columns produced by LATERAL VIEW. 2) It's not executed eagerly, i.e. `sql("...multi-insert clause...")` won't take place right away like other commands, e.g. CREATE TABLE.
This PR removes these limitations and make us fully support multi-insert.
## How was this patch tested?
new tests in `SQLQuerySuite`
Author: Wenchen Fan <wenchen@databricks.com>
Closes #11754 from cloud-fan/lateral-view.
Diffstat (limited to 'mllib')
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