sql SELECT a.attname AS field_name, t.typname AS field_type FROM pg_attribute a JOIN pg_type t ON a.atttypid = t.oid WHERE a.attrelid = 'your_table_name'::regclass -- 替换为你的表名 AND a.attnum > 0 -- 过滤掉系统字段 AND NOT a.attisdropped; -- 过滤掉已删除的字段 ...
SELECT pg_attribute.attname, pg_attribute.attnum,pg_description.description as description FROM pg_index, pg_class, pg_attribute ,pg_description WHERE 1=1 AND pg_index.indrelid = pg_class.oid AND pg_attribute.attrelid = pg_class.oid and pg_description.objoid=pg_attribute.attrelid and pg_...
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...
### 使用 `pg_catalog.pg_attribute` 和其他系统表这是更底层的方法,直接查询 PostgreSQL 内部使用的系统表。通常这种方法会复杂一些,但可以提供更多的细节。 ```sql SELECT a.attname AS column_name, pg_catalog.format_type(a.atttypid, a.atttypmod) AS data_type, CASE WHEN a.attnotnull THEN 'NO...
FROM pg_attribute AS att JOIN pg_class AS tbl ON att.attrelid = tbl.oid JOIN pg_namespace AS ns ON ns.oid = tbl.relnamespace LEFT JOIN pg_stats AS s ON s.schemaname=ns.nspname AND s.tablename = tbl.relname AND s.inherited=false AND s.attname=att.attname ...
pg_attribute.attname as colname from pg_constraint inner joinpg_class on pg_constraint.conrelid = pg_class.oid inner join pg_attribute on pg_attribute.attrelid = pg_class.oid and pg_attribute.attnum = pg_constraint.conkey[1] inner join pg_type on ...
TableAttributeNumber uint16 // 特定表的列属性编号，其他为0 DataTypeOID uint32 // 数据类型OID DataTypeSize int16 // 数据类型大小 TypeModifier int32 // 类型修改器 Format int16 // 字段的格式 0为text, 1为binary } type ColumnInfo struct { Schema string // Schema名称 Table ...
pg_attribute系统表中atttypid与attname字段分别是表字段类型与名称。 c)更改字段由int4更改为int8: AI检测代码解析 alter table student alter column sex type bigint; 1. d)如果把字段name把属性Text转化为int,原来text里面存在空啥的,可以 AI检测代码解析 ...
/* current per-attribute values */#defineFIELDNO_TUPLETABLESLOT_ISNULL6bool*tts_isnull;/* current per-attribute isnull flags */MemoryContext tts_mcxt;/* slot itself is in this context */ItemPointerData tts_tid;/* stored tuple's tid */Oid tts_tableOid;/* table oid of tuple */}...
objsubid对于一个表字段的注释,它是字段号,对应于pg_attribute.attnum。对于其它对象类型,它是零。 description作为对该对象的描述的任意文本 查询用户表 SELECT a.oid, a.relnameAS name, b.descriptionAS comment FROM pg_class a LEFT OUTERJOIN pg_description bON b.objsubid=0AND a.oid = b.objoid ...