[CASSANDRA-12606] CQLSSTableWriter unable to use blob conversion functions

• Type: Bug
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 3.0.15, 3.11.1, 4.0-alpha1, 4.0
• Component/s: Legacy/CQL, Legacy/Tools
• Severity: Low
• Since Version: 3.0.0
• Assignee: Alex Petrov
• Reporter: Mark Reddy

Authors

Alex Petrov

Reviewers

Joel Knighton

• Created: 02/Sep/16 22:56
• Updated: 15/May/20 08:03
• Resolved: 29/Jun/17 16:10

Description

Attempting to use blob conversion functions e.g. textAsBlob, from 3.0 - 3.7 results in:

Exception in thread "main" org.apache.cassandra.exceptions.InvalidRequestException: Unknown function textasblob called
	at org.apache.cassandra.cql3.functions.FunctionCall$Raw.prepare(FunctionCall.java:136)
	at org.apache.cassandra.cql3.Operation$SetValue.prepare(Operation.java:163)
	at org.apache.cassandra.cql3.statements.UpdateStatement$ParsedInsert.prepareInternal(UpdateStatement.java:173)
	at org.apache.cassandra.cql3.statements.ModificationStatement$Parsed.prepare(ModificationStatement.java:785)
	at org.apache.cassandra.cql3.statements.ModificationStatement$Parsed.prepare(ModificationStatement.java:771)
	at org.apache.cassandra.io.sstable.CQLSSTableWriter$Builder.prepareInsert(CQLSSTableWriter.java:567)
	at org.apache.cassandra.io.sstable.CQLSSTableWriter$Builder.build(CQLSSTableWriter.java:510)

The following snippet will reproduce the issue

String table = String.format("%s.%s", "test_ks", "test_table");
String schema = String.format("CREATE TABLE %s (test_text text, test_blob blob, PRIMARY KEY(test_text));", table);
String insertStatement = String.format("INSERT INTO %s (test_text, test_blob) VALUES (?, textAsBlob(?))", table);

File tempDir = Files.createTempDirectory("tempDir").toFile();

CQLSSTableWriter sstableWriter = CQLSSTableWriter.builder()
        .forTable(schema)
        .using(insertStatement)
        .inDirectory(tempDir)
        .build();

This is caused in FunctionResolver.get(...) when candidates.addAll(Schema.instance.getFunctions(name.asNativeFunction())); is called, as there is no system keyspace initialised.