luoyuxia commented on code in PR #22294:
URL: https://github.com/apache/flink/pull/22294#discussion_r1169457878
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flink-table/flink-sql-gateway/src/main/java/org/apache/flink/table/gateway/service/operation/OperationExecutor.java:
##########
@@ -182,23 +181,17 @@ public ResultFetcher configureSession(OperationHandle
handle, String statement)
public ResultFetcher executeStatement(OperationHandle handle, String
statement) {
// Instantiate the TableEnvironment lazily
- // TODO: remove the usage of the context classloader until {@link
Review Comment:
Althogh the comment said we need make `HiveParserUtils#getFunctionInfo` use
ResourceManager explicitly.
But after do some investigation, I found it's not necessary.
Currently, there's two callers to call method
`HiveParserUtils#getFunctionInfo`
1:
```java
FunctionInfo fi = HiveParserUtils.getFunctionInfo(funcText);
if (fi == null) {
desc = convertSqlOperator(funcText, children, ctx);
}
....
```
The `fi` will be null after we remove the classloader wrapper as it can't
load the function using `Thread.currentThread().getContextClassLoader()`. But
it's fine since it will then try to find the function from the function
catalog. Such case have been convered in flink-sql-client by `set.q`.
2: `getFuncExprNodeDescWithUdfData`
There're two places call method `getFuncExprNodeDescWithUdfData`.
a: convertGenericFunc(ExprNodeGenericFuncDesc func), but it will only be
called when it's hive build-in function, so it can be found in
`Thread.currentThread().getContextClassLoader()` as use must put
flink-connector-hive jar which include hive built-in functions to
FLINK_HOME/lib to use Hive Dialect.
b:
```java
// type conversion for LHS
if (TypeInfoUtils.isConversionRequiredForComparison(lhsType,
commonType)) {
lhsDesc =
HiveASTParseUtils.createConversionCast(
lhsDesc, (PrimitiveTypeInfo) commonType);
}
```
Also, ` HiveParserUtils.getFunctionInfo(funcText)` will only be called to
when it's build-in function which can then be loaded.
AFAIC, it's not easy to make `HiveParserUtils#getFunctionInfo` use
ResourceManager explicitly which will involves much modification. I think it's
fine to remove the usage of the context classloader in here.
cc @fsk119
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