The following bug has been logged online:

Bug reference:      5732
Logged by:          Josh Kupershmidt
Email address:      schmi...@gmail.com
PostgreSQL version: 8.3 and HEAD
Operating system:   Linux and OS X
Description:        parsing of: "WHERE mycol=123AND ..."
Details: 

I noticed that Postgres in many cases will happily tokenize WHERE clauses
having no space between a condition and "AND" or "OR". 

For example:
  CREATE TABLE mytab (mycol int);
  INSERT INTO mytab (mycol) VALUES (1), (2);

  SELECT * FROM mytab WHERE mycol = 1AND true;
  SELECT * FROM mytab WHERE mycol = 2OR true;

although some cases produce an error, as I would expect, such as:
  SELECT * FROM mytab WHERE mycol = 2::intOR true;

I think it would be more consistent to raise syntax errors in all these
cases. 

Josh

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