From e9b228b4d38283baa098e572a23475935dab0bcb Mon Sep 17 00:00:00 2001
From: KaiGai Kohei <kaigai@heterodb.com>
Date: Tue, 2 Apr 2024 23:45:04 +0900
Subject: [PATCH] bpchar's write_datum handler follows atttypmod, to add
 padding space if string is smaller

issue reported at #746
---
 src/xpu_textlib.cu | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/xpu_textlib.cu b/src/xpu_textlib.cu
index ef0e71c7d..10d9393be 100644
--- a/src/xpu_textlib.cu
+++ b/src/xpu_textlib.cu
@@ -170,10 +170,14 @@ xpu_bpchar_datum_write(kern_context *kcxt,
 	}
 	else
 	{
-		nbytes = VARHDRSZ + arg->length;
+		int		sz = VARHDRSZ + arg->length;
+
+		nbytes = Max(sz, cmeta->atttypmod);
 		if (buffer)
 		{
 			memcpy(buffer+VARHDRSZ, arg->value, arg->length);
+			if (sz < cmeta->atttypmod)
+				memset(buffer+sz, ' ', cmeta->atttypmod - sz);
 			SET_VARSIZE(buffer, nbytes);
 		}
 	}