Gopal V created HIVE-11679:
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Summary: SemanticAnalysis of "a=1" can result in a new
Configuration() object
Key: HIVE-11679
URL: https://issues.apache.org/jira/browse/HIVE-11679
Project: Hive
Issue Type: Bug
Components: Query Planning
Affects Versions: 1.3.0, 2.0.0
Reporter: Gopal V
{code}
public static ExprNodeGenericFuncDesc newInstance(GenericUDF genericUDF,
String funcText,
List<ExprNodeDesc> children) throws UDFArgumentException {
...
if (genericUDF instanceof GenericUDFBaseCompare && children.size() == 2) {
TypeInfo oiTypeInfo0 = children.get(0).getTypeInfo();
TypeInfo oiTypeInfo1 = children.get(1).getTypeInfo();
SessionState ss = SessionState.get();
Configuration conf = (ss != null) ? ss.getConf() : new Configuration();
{code}
This is both a SessionState.get() which is a threadlocal lookup or worse, a
new Configuration() which means XML parsing of multiple files for each
equality expression in the query.
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