scarlin-cloudera commented on a change in pull request #782: HIVE-22209:
Graceful error msg when there is no table for a materiali…
URL: https://github.com/apache/hive/pull/782#discussion_r327715922
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File path: ql/src/java/org/apache/hadoop/hive/ql/parse/QB.java
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@@ -456,4 +456,22 @@ public boolean containsQueryWithoutSourceTable() {
}
return aliasToTabs.size()==0 && aliasToSubq.size()==0;
}
+
+ // returns false when the query block doesn't have
+ // a table defined, e.g. "select 5"
+ public boolean hasTableDefined() {
+ // A table is not defined when there only exists a dummy
+ // table in the alias, so if it is blank, we know a table
+ // is defined.
+ if (aliasToTabs.size() == 0) {
+ return true;
+ }
+ for (String alias : aliasToTabs.keySet()) {
Review comment:
I looked at the code again...do you men aliases? That would definitely be a
better struct to use than the hashmap of tableAliases. If you confirm this,
I'll make the change.
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