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    Fix psql to not go into infinite recursion when expanding a variable that · 93dc6a1b
    Tom Lane 提交于
    refers to itself (directly or indirectly).  Instead, print a message when
    recursion is detected, and don't expand the repeated reference.  Per bug
    #5448 from Francis Markham.
    
    Back-patch to 8.0.  Although the issue exists in 7.4 as well, it seems
    impractical to fix there because of the lack of any state stack that
    could be used to track active expansions.
    93dc6a1b
psqlscan.l 45.6 KB