Cheng Lian created SPARK-19737: ---------------------------------- Summary: New analysis rule for reporting unregistered functions without relying on relation resolution Key: SPARK-19737 URL: https://issues.apache.org/jira/browse/SPARK-19737 Project: Spark Issue Type: Bug Components: SQL Affects Versions: 2.2.0 Reporter: Cheng Lian Fix For: 2.2.0
Let's consider the following simple SQL query that reference an invalid function {{foo}} that is never registered in the function registry: {code:sql} SELECT foo(a) FROM t {code} Assuming table {{t}} is a partitioned temporary view consisting of a large number of files stored on S3, then it may take the analyzer a long time before realizing that {{foo}} is not registered yet. The reason is that the existing analysis rule {{ResolveFunctions}} requires all child expressions to be resolved first. Therefore, {{ResolveRelations}} has to be executed first to resolve all columns referenced by the unresolved function invocation. This further leads to partition discovery for {{t}}, which may take a long time. To address this case, we propose a new lightweight analysis rule {{LookupFunctions}} that # Matches all unresolved function invocation # Look up the function name from the function registry # Report analysis error for any unregistered functions Since this rule doesn't try to actually resolve the unresolved functions, it doesn't rely on {{ResolveRelations}} and therefore doesn't trigger partition discovery. We may put this analysis rule in a separate {{Once}} rule batch that sits between the "Substitution" batch and the "Resolution" batch to avoid running it repeatedly. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org