HyukjinKwon opened a new pull request, #44846:
URL: https://github.com/apache/spark/pull/44846
### What changes were proposed in this pull request?
This PR improves error message for spark.table when argument type is wrong
```python
spark.table(None)
```
**Before:**
```
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/.../spark/python/pyspark/sql/session.py", line 1710, in table
return DataFrame(self._jsparkSession.table(tableName), self)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/.../spark/python/lib/py4j-0.10.9.7-src.zip/py4j/java_gateway.py",
line 1322, in __call__
File "/.../spark/python/pyspark/errors/exceptions/captured.py", line 215,
in deco
return f(*a, **kw)
^^^^^^^^^^^
File "/.../spark/python/lib/py4j-0.10.9.7-src.zip/py4j/protocol.py", line
326, in get_return_value
py4j.protocol.Py4JJavaError: An error occurred while calling o27.table.
: java.lang.NullPointerException: Cannot invoke "String.length()" because
"s" is null
at org.antlr.v4.runtime.CharStreams.fromString(CharStreams.java:222)
at org.antlr.v4.runtime.CharStreams.fromString(CharStreams.java:212)
at
org.apache.spark.sql.catalyst.parser.AbstractParser.parse(parsers.scala:58)
at
org.apache.spark.sql.execution.SparkSqlParser.parse(SparkSqlParser.scala:55)
at
org.apache.spark.sql.catalyst.parser.AbstractSqlParser.parseMultipartIdentifier(AbstractSqlParser.scala:54)
at org.apache.spark.sql.DataFrameReader.table(DataFrameReader.scala:681)
at org.apache.spark.sql.SparkSession.table(SparkSession.scala:619)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:374)
at py4j.Gateway.invoke(Gateway.java:282)
```
**After:**
```
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/.../spark/python/pyspark/sql/session.py", line 1711, in table
raise PySparkTypeError(
pyspark.errors.exceptions.base.PySparkTypeError: [INVALID_TYPE] Argument
`tableName` should not be a str.
```
### Why are the changes needed?
For better error messages to the end users.
### Does this PR introduce _any_ user-facing change?
Yes, it fixes the user-facing error messages.
### How was this patch tested?
Unittest was added.
### Was this patch authored or co-authored using generative AI tooling?
No.
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