Backpatch: Fix tsvector_out() and tsquery_out() to escape backslesh, add test of that.

Patch by Bruce Momjian <bruce@momjian.us>

1 files changed, 8 insertions, 0 deletions

diff --git a/contrib/tsearch2/tsvector.c b/contrib/tsearch2/tsvector.c
index 059a247f186..ac8923d8dac 100644
--- a/contrib/tsearch2/tsvector.c
+++ b/contrib/tsearch2/tsvector.c
@@ -550,6 +550,14 @@ tsvector_out(PG_FUNCTION_ARGS)
 				curout = outbuf + pos;
 				*curout++ = '\'';
 			}
+			else if (t_iseq(curin, '\\'))
+			{
+				int4		pos = curout - outbuf;
+
+				outbuf = (char *) repalloc((void *) outbuf, ++lenbuf);
+				curout = outbuf + pos;
+				*curout++ = '\\';
+			}
 			while (len--)
 				*curout++ = *curin++;
 		}