Fixed blankspace padding in char datatype for multibyte characters (b…

…abelfish-for-postgresql#2167)

Currently when multi-byte character is casted to char(1) space padding was not done properly. This PR will fix this issue.

Task: BABEL-4638
Signed-off-by: Rohit Bhagat <[email protected]>

contrib/babelfishpg_common/src/varchar.c

@@ -1133,6 +1133,7 @@ bpchar(PG_FUNCTION_ARGS)
 		size_t		maxmblen;
 
 		maxmblen = pg_encoding_mbcliplen(collInfo.enc, tmp, byteLen, maxByteLen);
+		blankSpace = maxByteLen - maxmblen;
 
 		if (!isExplicit &&
 			!(suppress_string_truncation_error_hook && (*suppress_string_truncation_error_hook) ()))

test/JDBC/expected/BABEL-4638-vu-cleanup.out

@@ -0,0 +1,16 @@
+DROP TABLE babel_4638_t1
+DROP TABLE babel_4638_t2
+DROP TABLE babel_4638_t3
+DROP TABLE babel_4638_t4
+DROP TABLE babel_4638_t5
+DROP TABLE babel_4638_char_t1
+DROP TABLE babel_4638_char_t2
+DROP TABLE babel_4638_char_t3
+DROP TABLE babel_4638_char_t4
+DROP TABLE babel_4638_char_t5
+DROP TABLE babel_4638_nchar_t1
+DROP TABLE babel_4638_nchar_t2
+DROP TABLE babel_4638_nchar_t3
+DROP TABLE babel_4638_nchar_t4
+DROP TABLE babel_4638_nchar_t5
+GO

test/JDBC/expected/BABEL-4638-vu-prepare.out

@@ -0,0 +1,37 @@
+CREATE TABLE babel_4638_t1(a VARCHAR(10) COLLATE arabic_ci_as);
+CREATE TABLE babel_4638_t2(a VARCHAR(10) COLLATE chinese_prc_ci_as);
+CREATE TABLE babel_4638_t3(a VARCHAR(10) COLLATE japanese_ci_as);
+CREATE TABLE babel_4638_t4(a VARCHAR(10) COLLATE hebrew_ci_as);
+CREATE TABLE babel_4638_t5(a VARCHAR(10));
+GO
+
+CREATE TABLE babel_4638_char_t1(a CHAR(10) COLLATE arabic_ci_as);
+CREATE TABLE babel_4638_char_t2(a CHAR(10) COLLATE chinese_prc_ci_as);
+CREATE TABLE babel_4638_char_t3(a CHAR(10) COLLATE japanese_ci_as);
+CREATE TABLE babel_4638_char_t4(a CHAR(10) COLLATE hebrew_ci_as);
+CREATE TABLE babel_4638_char_t5(a CHAR(10));
+GO
+
+CREATE TABLE babel_4638_nchar_t1(a NCHAR(10) COLLATE arabic_ci_as);
+CREATE TABLE babel_4638_nchar_t2(a NCHAR(10) COLLATE chinese_prc_ci_as);
+CREATE TABLE babel_4638_nchar_t3(a NCHAR(10) COLLATE japanese_ci_as);
+CREATE TABLE babel_4638_nchar_t4(a NCHAR(10) COLLATE hebrew_ci_as);
+CREATE TABLE babel_4638_nchar_t5(a NCHAR(10));
+GO
+
+INSERT INTO babel_4638_t1 VALUES('ح'), ('غ'), ('سسس'), ('للل');
+INSERT INTO babel_4638_t2 VALUES('五'), ('九'), ('乙乙乙'), ('魚魚魚');
+INSERT INTO babel_4638_t3 VALUES('あ'), ('九'), ('ちちち'), ('さささ');
+INSERT INTO babel_4638_t4 VALUES('ב'), ('א'), ('קקק'), ('מממ');
+INSERT INTO babel_4638_t5 VALUES('a'), ('🙂'), ('🙂🙂🙂'), ('さささ');
+GO
+~~ROW COUNT: 4~~
+
+~~ROW COUNT: 4~~
+
+~~ROW COUNT: 4~~
+
+~~ROW COUNT: 4~~
+
+~~ROW COUNT: 4~~
+