CREATE OPERATOR CLASS定义一个新的操作符表。CREATE OPERATOR CLASS name [ DEFAULT ] FOR TYPE data_type USING index_method AS { OPERATOR strategy_number operator_name [ ( op_type, op_type ) ] [ RECHECK ] | FUNCTION support_number func_name ( argument_type [, ...] ) | STORAGE storage_...
CREATEOPERATORFAMILY integer_ops USING btree; CREATEOPERATORCLASSint8_opsDEFAULTFORTYPEint8 USING btree FAMILY integer_opsAS-- 标准 int8 比较OPERATOR1< ,OPERATOR2<= ,OPERATOR3= ,OPERATOR4>= ,OPERATOR5> ,FUNCTION1btint8cmp(int8, int8),FUNCTION2btint8sortsupport(internal);CREATEOPERATORCLASSint4...
以int4 支持 B-tree 索引定义int4_opsopclass 为例,假设用 SQL 定义,可以写为: CREATE OPERATOR CLASS int4_ops DEFAULT FOR TYPE int4 USING btree FAMILY integer_ops AS -- operator set (strategies) OPERATOR 1 <(int4, int4) , OPERATOR 2 <=(int4, int4) , OPERATOR 3 =(int4, int4) ...
CREATE OPERATOR CLASS name [ DEFAULT ] FOR TYPE data_type USING index_method AS { OPERATOR strategy_number operator_name [ ( op_type, op_type ) ] [ RECHECK ] | FUNCTION support_number func_name ( argument_type [, ...] ) | STORAGE storage_type } [, ... ] CREATE ROLE 定义一个新...
postgresql 创建索引:ERROR: operator class "gin_trgm_ops" does not exist for access method "gin" g_trgmis an extension, so: CREATEEXTENSION pg_trgm; If you get the following error ERROR: could not open extension control file ".../extension/pg_trgm.control":...
PostgreSQL 命令-CREATE FUNCTION PostgreSQL 命令-CREATE GROUP PostgreSQL 命令-CREATE INDEX PostgreSQL 命令-CREATE LANGUAGE PostgreSQL 命令-CREATE OPERATOR PostgreSQL 命令-CREATE OPERATOR CLASS PostgreSQL 命令-CREATE ROLE PostgreSQL 命令-CREATE RULE PostgreSQL 命令-CREATE SCHEMA PostgreSQL 命令-CREATE SERVER Postg...
CREATE OPERATOR CLASS 定义一个新的操作符表。 CREATE OPERATOR CLASS name [ DEFAULT ] FOR TYPE data_type USING index_method AS { OPERATOR strategy_number operator_name [ ( op_type, op_type ) ] [ RECHECK ] | FUNCTION support_number func_name ( argument_type [, ...] ) ...
https://www.postgresql.org/docs/11/static/sql-createoperator.html 2、PostgreSQL还允许用户自定义索引接口,因此操作符能否使用索引,能使用什么索引接口,这些都可以定义。并且也有对应关系。 https://www.postgresql.org/docs/11/static/sql-createopclass.html ...
tuples_fetched tuples_fetched from t),costs(startup_cost, run_cost) AS ( SELECT ( SELECT round( 358 /* child node cost */ + 0.1 * current_setting('cpu_operator_cost')::real * reltuples * 0.01027850 ) FROM pg_class WHERE relname = 'idx_a_t1' ), ...
operator class操作符类我没选 下边的partitions框就是创建具体分区的,我们先不创建,先创建父表 可以预览一下sql,毕竟不能只会用pgadmin可视化操作,保存结束 创建分区 找到刚才创建的父表,打开属性,找到分区(partitions),因为我们使用的list的类型,所以指定in字段即可 ...