General Bug Report: Documentation problem

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                        POSTGRESQL BUG REPORT TEMPLATE
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Your name               : Dan Merillat
Your email address      : Dan@merillat.org

Category                : install: other
Severity                : non-critical

Summary: Documentation problem

System Configuration
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  Operating System   : N/A

  PostgreSQL version : 6.3

  Compiler used      : N/A

Hardware:
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N/A

Versions of other tools:
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N/A

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Problem Description:
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libpq documentation has a few errors.  Most notably, the reccomended style of error handling.
psuedocode: res=PQexec(conn, "error-prone-statement"); if (PQresultStatus(res) != PGRES_TUPLES_OK) { do_error_code(); }
This is actually incorrect, since on error, PQexec returns null, so PQresultStatus (which I can't find documented)
derefrencesa null pointer. 
Correct example code would be res=PQexec(conn, "error-prone-statment"); if (!res) { printf("PQexec(): %s\n",
PQerrorMessage(conn));exit(1) } 

If nobody else is working on the documentation reply to me, and I'll submit diffs.

--Dan


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Test Case:
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Solution:
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