pg_constraint.conrelid = pg_class.oid inner join pg_attribute on pg_attribute.attrelid = pg_class.oid and pg_attribute.attnum = any(pg_constraint.conkey) inner join pg_type on pg_type.oid = pg_attribute.atttypid where pg_class.relname = c.relname and pg_constraint.contype = 'p' a...
CREATE OR REPLACE FUNCTION pgsql_type(a_type varchar) RETURNS varchar AS $BODY$ DECLARE v_type varchar; BEGIN IF a_type='int8' THEN v_type:='bigint'; ELSIF a_type='int4' THEN v_type:='integer'; ELSIF a_type='int2' THEN v_type:='smallint'; ELSIF a_type='bpchar' THEN v_t...
user_defined_type_schema user_defined_type_name is_insertable_into is_typed commit_action STATISTICS 索引信息 information_schema.STATISTICS 示例1 根据模式名查表记录数 SELECT relname AS TABLE_NAME, reltuples AS rowCounts FROM pg_class WHERE relkind = 'r' AND relnamespace = ( SELECT oid FROM...
pgsql Type 映射java什么类型 jpa实体类映射类 一、Spring Data JPA的基本使用 1、编写ORM实体类 实体类与数据表进行映射,并且配置好映射关系。 1. 1.1 创建实体类 举个例子 @Entity(name=" <mysql数据库里对应的表名> ") //该注解表示当前实体类是与表有映射关系的实体类 public class discuss{ @Id //...
pg_type as T WHERE C.relname = 'aaa' AND A.attrelid = C.oid AND A.atttypid= T.oid AND A.attnum > 0 AND NOT A.attisdropped 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. AND NOT A.attisdropped 过滤掉已删除的字段 ...
pg_typeof(1.33333::float(53)); pg_typeof --- double precision (1 row) db=# select pg_typeof(1.33333::float(54)); ERROR: precision for type float must be less than 54 bits LINE 1: select pg_typeof(1.3) -- 其中float4就是real db=# select pg_typeof(1.33333::float4); pg_...
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正在开发中的 PostgreSQL 17 即将增加一个新功能:PL/pgSQL 支持定义伪类型 %TYPE以及%ROWTYPE 数组。当我们使用 PL/pgSQL 编写存储过程或者函数时,可以定义不同类型的变量。例如: user_id integer; quantity …
CREATEORREPLACEFUNCTIONpgsql_type(a_type varchar)RETURNSvarcharAS$BODY$DECLAREv_type varchar;BEGINIFa_type='int8'THENv_type:='bigint';ELSIFa_type='int4'THENv_type:='integer';ELSIFa_type='int2'THENv_type:='smallint';ELSIFa_type='bpchar'THENv_type:='char';ELSEv_type:=a_type;ENDIF...