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![]() This patch adds a way to override default collations (or "character set collations") for desired character sets. The SQL standard says: > Each collation known in an SQL-environment is applicable to one > or more character sets, and for each character set, one or more > collations are applicable to it, one of which is associated with > it as its character set collation. In MariaDB, character set collations has been hard-coded so far, e.g. utf8mb4_general_ci has been a hard-coded character set collation for utf8mb4. This patch allows to override (globally per server, or per session) character set collations, so for example, uca1400_ai_ci can be set as a character set collation for Unicode character sets (instead of compiled xxx_general_ci). The array of overridden character set collations is stored in a new (session and global) system variable @@character_set_collations and can be set as a comma separated list of charset=collation pairs, e.g.: SET @@character_set_collations='utf8mb3=uca1400_ai_ci,utf8mb4=uca1400_ai_ci'; The variable is empty by default, which mean use the hard-coded character set collations (e.g. utf8mb4_general_ci for utf8mb4). The variable can also be set globally by passing to the server startup command line, and/or in my.cnf. |
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archive | ||
atomic | ||
binlog | ||
binlog_encryption | ||
client | ||
compat | ||
csv | ||
encryption | ||
engines | ||
events | ||
federated | ||
funcs_1 | ||
funcs_2 | ||
galera | ||
galera_3nodes | ||
galera_3nodes_sr | ||
galera_sr | ||
gcol | ||
handler | ||
heap | ||
innodb | ||
innodb_fts | ||
innodb_gis | ||
innodb_i_s | ||
innodb_zip | ||
jp | ||
json | ||
large_tests | ||
maria | ||
mariabackup | ||
merge | ||
mtr/t | ||
mtr2 | ||
multi_source | ||
optimizer_unfixed_bugs | ||
parts | ||
perfschema | ||
perfschema_stress | ||
period | ||
plugins | ||
roles | ||
rpl | ||
s3 | ||
sql_sequence | ||
storage_engine | ||
stress | ||
sys_vars | ||
sysschema | ||
unit | ||
vcol | ||
versioning | ||
wsrep |