General Bug Report: obscure error when misusing table name as an attribute

Added to TODO list. I like your error message much better.

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POSTGRESQL BUG REPORT TEMPLATE
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Your name : Diab Jerius
Your email address : djerius@cfa.harvard.edu

Category : unknown
Severity : non-critical

Summary: obscure error when misusing table name as an attribute

System Configuration
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Operating System : Solaris 2.6

PostgreSQL version : 6.4.2

Compiler used : Sunpro cc 4.2

Hardware:
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SunOS fondue 5.6 Generic_105181-12 sun4m sparc SUNW,SPARCstation-20

Versions of other tools:
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flex 2.5.4

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Problem Description:
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I get a very obscure error message when I mistakenly use
a table name as an attribute and compare it to
an IN clause

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Test Case:
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xrcf_tc_log is a table; there is no attribute in xrcf_tc_log
named xrcf_tc_log

spectral=> select xtc_testid from xrcf_tc_log where xrcf_tc_log not in ( select trwid from as_run_cmdb );
NOTICE: unknown node tag 704 in fireRIRonSubselect()
NOTICE: Node is: { IDENT "xrcf_tc_log" }
ERROR: ExecEvalExpr: unknown expression type 704

Shouldn't it say something like "Yo Dude! no such attribute"?

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Solution:
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