General Bug Report: adding column to table w/ index causes column not to be seen

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POSTGRESQL BUG REPORT TEMPLATE
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Your name : Diab Jerius
Your email address : djerius(at)cfa(dot)harvard(dot)edu

Category : runtime: back-end
Severity : serious

Summary: adding column to table w/ index causes column not to be seen

System Configuration
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Operating System : Solaris 2.6

PostgreSQL version : 6.4.2

Compiler used : SunCC 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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It seems that if a column is created in a table with an existant index,
and an attempt is made to use that index, the backend doesn't
see the new column.

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Test Case:
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The following SQL illustrates the problem:

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drop table snafu;
create table snafu ( a1 text, a2 text );
insert into snafu values ( 'snark', 'fido' );
create index snafu_i1 on snafu using hash ( a1 );
alter table snafu add column a3 text;
update snafu set a3 = 'snzay' where a1 = 'snark';
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This results in

drop table snafu;
DROP

create table snafu ( a1 text, a2 text );
CREATE

insert into snafu values ( 'snark', 'fido' );
INSERT 156996266 1

create index snafu_i1 on snafu using hash ( a1 );
CREATE

alter table snafu add column a3 text;
ADD

update snafu set a3 = 'snzay' where a1 = 'snark';
ERROR: Relation snafu does not have attribute a3

Removing the "create index ..." line causes the problem to
go away.

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Solution:
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