[jira] [Assigned] (IMPALA-4061) HdfsAvroScanner::CodegenReadRecord() may generate code with unassigned values

["Zoltán Borók-Nagy (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-4061?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zoltán Borók-Nagy reassigned IMPALA-4061:
-----------------------------------------

    Assignee: Zoltán Borók-Nagy

> HdfsAvroScanner::CodegenReadRecord() may generate code with unassigned values
> -----------------------------------------------------------------------------
>
>                 Key: IMPALA-4061
>                 URL: https://issues.apache.org/jira/browse/IMPALA-4061
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Backend
>    Affects Versions: Impala 2.7.0
>            Reporter: Michael Ho
>            Assignee: Zoltán Borók-Nagy
>            Priority: Major
>              Labels: codegen
>
> {noformat}    
>     Value* ret_val;
>     if (field->schema->type == AVRO_RECORD) {
>       BasicBlock* insert_before_block =
>           (null_block != NULL) ? null_block : end_field_block;
>       RETURN_IF_ERROR(CodegenReadRecord(new_path, *field, node, codegen, builder, fn,
>           insert_before_block, bail_out, this_val, pool_val, tuple_val, data_val,
>           data_end_val));
>     } else {
>       RETURN_IF_ERROR(CodegenReadScalar(*field, slot_desc, codegen, builder,
>           this_val, pool_val, tuple_val, data_val, data_end_val, &ret_val));
>     }
>     builder->CreateCondBr(ret_val, end_field_block, bail_out);
> {noformat}
> {{ret_val}} is not assigned in the path CodegenReadRecord(). It appears to only affect nested type with avro only which we don't really support.



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