From: Robert Haas <rhaas@postgresql.org>
Date: Wed, 16 Nov 2011 01:34:47 +0000 (-0500)
Subject: Don't elide blank lines when accumulating psql command history.
X-Git-Tag: REL9_0_6~17
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=90bbeb195deed468decbd03af713512a990c1938;p=postgresql

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.
---

diff --git a/src/bin/psql/input.c b/src/bin/psql/input.c
index d28fe9c0ba..56aa1bf702 100644
--- a/src/bin/psql/input.c
+++ b/src/bin/psql/input.c
@@ -95,10 +95,10 @@ 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