Github user windpiger commented on the issue:
https://github.com/apache/spark/pull/16938
**1. CREATE TABLE ... LOCATION path**
```
a) path exists
hive -> ok
spark -> ok
b) path not exists
hive -> ok
spark -> throw exception(path does not exists)
```
**2. CREATE TABLE ... LOCATION path AS SELECT ...**
```
a) path exists
hive -> throw exception(CREATE-TABLE-AS-SELECT cannot create table
with location to a non-empty directory.)
spark -> throw exception(path already exists)
b) path not exists
hive -> ok
spark -> ok
```
**3. ALTER TABLE ... SET LOCATION path**
```
a) path exists
hive -> ok
spark -> ok
b) path not exists
hive -> ok
spark -> ok
```
**4. CREATE TABLE ... **
```
a) default warehouse table path exists
hive -> ok
spark -> ok
b) default warehouse table path not exists
hive -> ok
spark -> ok
```
**5. CREATE TABLE ... AS SELECT ...**
```
a) default warehouse table path exists
hive -> ok
spark -> throw exception(path already exists)
b) default warehouse table path not exists
hive -> ok
spark -> ok
```
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