Support MariaDB 10.2 collations

[bgrainger]

From the query select coll.ID, coll.COLLATION_NAME, cs.MAXLEN from information_schema.collations coll inner join information_schema.character_sets cs using(CHARACTER_SET_NAME) order by coll.ID; on MariaDB 10.2.8.

ID	Collation	Max Length
576	utf8_croatian_ci	3
577	utf8_myanmar_ci	3
578	utf8_thai_520_w2	3
608	utf8mb4_croatian_ci	4
609	utf8mb4_myanmar_ci	4
610	utf8mb4_thai_520_w2	4
640	ucs2_croatian_ci	2
641	ucs2_myanmar_ci	2
642	ucs2_thai_520_w2	2
672	utf16_croatian_ci	4
673	utf16_myanmar_ci	4
674	utf16_thai_520_w2	4
736	utf32_croatian_ci	4
737	utf32_myanmar_ci	4
738	utf32_thai_520_w2	4
1025	big5_chinese_nopad_ci	2
1027	dec8_swedish_nopad_ci	1
1028	cp850_general_nopad_ci	1
1030	hp8_english_nopad_ci	1
1031	koi8r_general_nopad_ci	1
1032	latin1_swedish_nopad_ci	1
1033	latin2_general_nopad_ci	1
1034	swe7_swedish_nopad_ci	1
1035	ascii_general_nopad_ci	1
1036	ujis_japanese_nopad_ci	3
1037	sjis_japanese_nopad_ci	2
1040	hebrew_general_nopad_ci	1
1042	tis620_thai_nopad_ci	1
1043	euckr_korean_nopad_ci	2
1046	koi8u_general_nopad_ci	1
1048	gb2312_chinese_nopad_ci	2
1049	greek_general_nopad_ci	1
1050	cp1250_general_nopad_ci	1
1052	gbk_chinese_nopad_ci	2
1054	latin5_turkish_nopad_ci	1
1056	armscii8_general_nopad_ci	1
1057	utf8_general_nopad_ci	3
1059	ucs2_general_nopad_ci	2
1060	cp866_general_nopad_ci	1
1061	keybcs2_general_nopad_ci	1
1062	macce_general_nopad_ci	1
1063	macroman_general_nopad_ci	1
1064	cp852_general_nopad_ci	1
1065	latin7_general_nopad_ci	1
1067	macce_nopad_bin	1
1069	utf8mb4_general_nopad_ci	4
1070	utf8mb4_nopad_bin	4
1071	latin1_nopad_bin	1
1074	cp1251_nopad_bin	1
1075	cp1251_general_nopad_ci	1
1077	macroman_nopad_bin	1
1078	utf16_general_nopad_ci	4
1079	utf16_nopad_bin	4
1080	utf16le_general_nopad_ci	4
1081	cp1256_general_nopad_ci	1
1082	cp1257_nopad_bin	1
1083	cp1257_general_nopad_ci	1
1084	utf32_general_nopad_ci	4
1085	utf32_nopad_bin	4
1086	utf16le_nopad_bin	4
1088	armscii8_nopad_bin	1
1089	ascii_nopad_bin	1
1090	cp1250_nopad_bin	1
1091	cp1256_nopad_bin	1
1092	cp866_nopad_bin	1
1093	dec8_nopad_bin	1
1094	greek_nopad_bin	1
1095	hebrew_nopad_bin	1
1096	hp8_nopad_bin	1
1097	keybcs2_nopad_bin	1
1098	koi8r_nopad_bin	1
1099	koi8u_nopad_bin	1
1101	latin2_nopad_bin	1
1102	latin5_nopad_bin	1
1103	latin7_nopad_bin	1
1104	cp850_nopad_bin	1
1105	cp852_nopad_bin	1
1106	swe7_nopad_bin	1
1107	utf8_nopad_bin	3
1108	big5_nopad_bin	2
1109	euckr_nopad_bin	2
1110	gb2312_nopad_bin	2
1111	gbk_nopad_bin	2
1112	sjis_nopad_bin	2
1113	tis620_nopad_bin	1
1114	ucs2_nopad_bin	2
1115	ujis_nopad_bin	3
1116	geostd8_general_nopad_ci	1
1117	geostd8_nopad_bin	1
1119	cp932_japanese_nopad_ci	2
1120	cp932_nopad_bin	2
1121	eucjpms_japanese_nopad_ci	3
1122	eucjpms_nopad_bin	3
1125	utf16_unicode_nopad_ci	4
1147	utf16_unicode_520_nopad_ci	4
1152	ucs2_unicode_nopad_ci	2
1174	ucs2_unicode_520_nopad_ci	2
1184	utf32_unicode_nopad_ci	4
1206	utf32_unicode_520_nopad_ci	4
1216	utf8_unicode_nopad_ci	3
1238	utf8_unicode_520_nopad_ci	3
1248	utf8mb4_unicode_nopad_ci	4
1270	utf8mb4_unicode_520_nopad_ci	4