在 openGauss 中默认是不走索引的,这点与 MySQL 在默认情况下不太一致;openGauss 对字符串类型的字段,一般在进行等值查询时会选择使用索引,如果对于该字段更多地进行模糊查询(如 like 或正则),则需要在创建索引时显式地添加 text_pattern_ops 参数,如create index on movies (title text_patt
(如like或正则),则需要在创建索引时显式地添加text_pattern_ops参数,如 create index on movies (title text_pattern_ops); 同时,同MySQL等数据库一样,该B+ Tree索引也只仅支持前缀匹配查询,如果希望利用B+ Tree进行后缀匹配,可以使用字符串翻转小技巧;对于全文检索,可以使用openGauss支持的tsquery特性,并通过创建...
在openGauss中默认是不走索引的,这点与MySQL在默认情况下不太一致;openGauss对字符串类型的字段,一般在进行等值查询时会选择使用索引,如果对于该字段更多地进行模糊查询(如like或正则),则需要在创建索引时显式地添加text_pattern_ops参数,如 create index on movies (title text_pattern_ops); 同时,同MySQL等数据库...
在openGauss中默认是不走索引的,这点与MySQL在默认情况下不太一致;openGauss对字符串类型的字段,一般在进行等值查询时会选择使用索引,如果对于该字段更多地进行模糊查询(如like或正则),则需要在创建索引时显式地添加text_pattern_ops参数,如 create index on movies (title text_pattern_ops); 同时,同MySQL等数据库...
pg_catalog: CREATE UNIQUE INDEX pg_replication_origin_roname_index ON pg_replication_origin USING btree (roname text_pattern_ops) TABLESPACE pg_global; pg_catalog: CREATE UNIQUE INDEX pg_resource_pool_name_index ON pg_resource_pool USING btree (respool_name) TABLESPACE pg_global; ...
# Disabled by default.INDEXES_RENAMING 0 # Operator classes text_pattern_ops, varchar_pattern_ops, and bpchar_pattern_ops # support B-tree indexes on the corresponding types. The difference from the # default operator classes is that the values are compared strictly character by ...
pg_catalog: CREATE UNIQUE INDEX pg_replication_origin_roname_index ON pg_replication_origin USING btree (roname text_pattern_ops) TABLESPACE pg_global; pg_catalog: CREATE UNIQUE INDEX pg_resource_pool_name_index ON pg_resource_pool USING btree (respool_name) TABLESPACE pg_global; ...
Server name pattern is unnecessarily restrictive. DBZ-3765 Crash when processing MySQL 5.7.28 TIME fields returns empty blob instead of null DBZ-3773 Debezium UI and CDC DBZ-3781 Disable "Next" if any field value is changed after the validation. DBZ-3783 Add DEFAULT to partition option engine...
(如 like 或正则),则需要在创建索引时显式地添加 text_pattern_ops 参数,如 create index on movies (title text_pattern_ops); 同时,同 MySQL 等数据库一样,该 B+ Tree 索引也只仅支持前缀匹配查询,如果希望利用 B+ Tree 进行后缀匹配,可以使用字符串翻转小技巧;对于全文检索,可以使用 openGauss 支持的 ...
pg_catalog: CREATE UNIQUE INDEX pg_replication_origin_roname_index ON pg_replication_origin USING btree (roname text_pattern_ops) TABLESPACE pg_global; pg_catalog: CREATE UNIQUE INDEX pg_resource_pool_name_index ON pg_resource_pool USING btree (respool_name) TABLESPACE pg_global; ...