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This is done by mapping most of the existing MySQL unicode 0900 collations to MariadB 1400 unicode collations. The assumption is that 1400 is a super set of 0900 for all practical purposes. I also added a new function 'compare_collations()' and changed most code to use this instead of comparing character sets directly. This enables one to seamlessly mix-and-match the corresponding 0900 and 1400 sets. Field comparision and alter table treats the character sets as identical. All MySQL 8.0 0900 collations are supported except: - utf8mb4_ja_0900_as_cs - utf8mb4_ja_0900_as_cs_ks - utf8mb4_ru_0900_as_cs - utf8mb4_zh_0900_as_cs These do not have corresponding entries in the MariadB 01400 collations. Other things: - Added COMMENT colum to information_schema.collations. For utf8mb4_0900 colletions it contains the corresponding alias collation. |
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