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commit    692ca693b90667fbbf25b8e8fc99c120543df114
Author:   Robert Haas <rhaas@postgresql.org>
Date:     Wed Nov 16 01:34:47 2011 +0000
First released in: 9.2.0, 8.2.23, 8.3.17, 8.4.10, 9.0.6, 9.1.2

    Don't elide blank lines when accumulating psql command history.
    
    This can change the meaning of queries, if the blank line happens to
    occur in the middle of a quoted literal, as per complaint from Tomas Vondra.
    
    Back-patch to all supported branches.


 src/bin/psql/input.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/bin/psql/input.c b/src/bin/psql/input.c
index 6a12dc9ff51..702d8aab8de 100644
--- a/src/bin/psql/input.c
+++ b/src/bin/psql/input.c
@@ -86,10 +86,10 @@ void
 pg_append_history(const char *s, PQExpBuffer history_buf)
 {
 #ifdef USE_READLINE
-	if (useHistory && s && s[0])
+	if (useHistory && s)
 	{
 		appendPQExpBufferStr(history_buf, s);
-		if (s[strlen(s) - 1] != '\n')
+		if (!s[0] || s[strlen(s) - 1] != '\n')
 			appendPQExpBufferChar(history_buf, '\n');
 	}
 #endif


[parent: e7c8efa064c8]