SELECT f28(); ERROR: 程序EXCEPTION 日志中会记录这个ERRCODE。 plaintext 20230824 14:54:58.909 CST,"teledb","teledb",335778,coord(335778,179),"192.168.30.5:48140",64e6fad7.51fa2,coord(335778,179),17,"SELECT",20230824 14:38:15 CST,16/179,0,ERROR,23505," 程序EXCEPTION ",,,,,"PL/pgSQL function f28() line 5 at RAISE","SELECT f28();",,,"telesql" 20230824 14:55:26.626 CST,"teledb","teledb",335778,coord(335778,180),"192.168.30.5:48140",64e6fad7.51fa2,coord(335778,180),18,"idle",20230824 14:38:15 CST,16/180,0,ERROR,42601,"syntax error at or near ""exit""",,,,,,"exit

本文为您介绍如何删除数据表。 删除当前模式下的数据表。 plaintext teledb drop table t; DROP TABLE 删除某个模式下数据表。 plaintext teledb d+ t Table "public.t" Column Type Collation Nullable Default Storage Stats target Description +++++++ id integer plain mc text extended Distribute By: SHARD(id) Location Nodes: ALL DATANODES teledb d+ tas Table "public.tas" Column Type Collation Nullable Default Storage Stats target Description +++++++ id integer plain mc text extended Distribute By: SHARD(id) Location Nodes: ALL DATANODES teledb drop table public.test; DROP TABLE 删除数据表，不存在时不执行，不报错。 plaintext teledb drop table IF EXISTS t; NOTICE: table "t" does not exist, skipping DROP TABLE 使用CASCADE无条件删除数据表。 plaintext teledb create view shardview as select from testshard; CREATE VIEW teledb drop table testshard; ERROR: cannot drop table testshard because other objects depend on it DETAIL: view shardview depends on table testshard HINT: Use DROP ... CASCADE to drop the dependent objects too. teledb drop table testshard cascade; NOTICE: drop cascades to view shardview DROP TABLE

本文为您介绍如何指定模式创建表。 plaintext teledb create table public.t1(id int,mc text); CREATE TABLE

本页为您介绍如何使用使用 IF NOT EXISTS关键字。 带IF NOT EXISTS 关键字作用表示表不存在时才创建。 plaintext teledb create table t(id int,mc text); CREATE TABLE teledb create table t(id int,mc text); ERROR: relation "t" already exists teledb create table IF NOT EXISTS t(id int,mc text); NOTICE: relation "t" already exists, skipping CREATE TABLE

本文介绍如何在使用SELECT语法时添加all条件。 需要大于所有值才为真。 plaintext teledb select from teledbpg where id > all (select 1 union select 3); id nickname + 4 (1 row)

本文介绍如何在使用SELECT语法时添加any条件。 只需要大于其中一个值即为真。 plaintext teledb select from teledbpg where id > any (select 1 union select 3); id nickname + 3 pg 4 2 TELEDB (3 rows)

本文为您介绍json应用的相关操作。 创建json 类型字段表 plaintext teledb create table tjson(id int,fjson json); CREATE TABLE 插入数据 plaintext teledb insert into tjson values(1,'{"col1":1,"col2":"teledb"}'); INSERT 0 1 teledb insert into tjson values(2,'{"col1":1,"col2":"teledb","col3":"pgxz"}'); INSERT 0 1 teledb select from tjson; id fjson + 1 {"col1":1,"col2":"teledb"} 2 {"col1":1,"col2":"teledb","col3":"pgxz"} (2 rows) 通过键获得json对象域 plaintext teledb select fjson >'col2' as col2 ,fjson > 'col3' as col3 from tjson; col2 col3 + "teledb" "teledb" "pgxz" (2 rows) 以文本形式获取对象值 plaintext teledb select fjson >>'col2' as col2 ,fjson >> 'col3' as col3 from tjson; col2 col3 + teledb teledb pgxz (2 rows) teledb select fjson >>'col2' as col2 ,fjson >> 'col3' as col3 from tjson where fjson >> 'col3' is not null; col2 col3 + teledb pgxz (1 row)

本文介绍只查询某个DN数据的操作。 plaintext teledb execute direct on (dn01) 'select from teledbpg'; id nickname + 1 teledb 1 hello,pgxc 2 TELEDB (3 rows) teledb execute direct on (dn02) 'select from teledbpg'; id nickname + 3 pg 4 (2 rows)

本文介绍如何在使用SELECT语法时进行聚合函数并发计算。 plaintext teledb set maxparallelworkerspergather to 0; SET Time: 0.214 ms teledb select count(1) from tcount; count 20000000 (1 row) Time: 2700.569 ms (00:02.701) teledb set maxparallelworkerspergather to 2; SET Time: 0.269 ms teledb select count(1) from tcount; count 20000000 (1 row) Time: 1867.719 ms (00:01.868)

本文为您介绍如何修改数据库配置。 修改数据库名称 plaintext teledb alter database teledbdb rename to teledbdbnew; ALTER DATABASE 修改连接数 plaintext teledb alter database teledbdbnew connection limit 50; ALTER DATABASE 修改数据库所有者 plaintext teledb alter database teledbdbnew owner to teledb; ALTER DATABASE 配置数据默认searchpath plaintext teledb alter database teledbdbnew set searchpath to public, pgcatalog; ALTER DATABASE alter database不支持修改的项目 项目 备注 encoding 编码 lccollate 排序规则 lcctype 分组规则

本页介绍天翼云TeleDB数据库修改存储过程名称的语法。 修改不带参数的存储过程名称 plaintext teledb CREATE OR REPLACE PROCEDURE proc1() AS $$ begin raise notice 'Hello telebdxpg'; end; $$ LANGUAGE PLPGSQL; CREATE PROCEDURE teledb alter procedure proc1() rename to proc11; ALTER PROCEDURE teledb 修改带参数的存储过程名称 plaintext teledb CREATE OR REPLACE PROCEDURE proc1(aint int) AS $$ begin raise notice '%',aint; end; $$ LANGUAGE PLPGSQL; CREATE PROCEDURE teledb alter procedure proc1 (aint int) rename to proc11; ALTER PROCEDURE

本文为您介绍如何通过SELECT语法访问函数。 plaintext teledb select md5(random()::text); md5 ed5b356234979a63efc6c4f6537c4853 (1 row)

本页介绍天翼云TeleDB数据库Oracle语法中的统计函数。 listagg plaintext listagg (filedname,',') WITHIN GROUP (ORDER BY filedname) 行转列函数。 plaintext teledb create table person teledb ( teledb( deptno varchar2(10), teledb( ename varchar(20) teledb( ); CREATE TABLE teledb insert into person values('20','aaa'); INSERT 0 1 teledb teledb insert into person values('20','bbb'); INSERT 0 1 teledb teledb insert into person values('20','ccc'); INSERT 0 1 teledb teledb insert into person values('21','ddd'); INSERT 0 1 teledb teledb insert into person values('21','eee'); INSERT 0 1 teledb select teledb deptno, teledb listagg (ename,',') WITHIN GROUP (ORDER BY ENAME) teledb from teledb person teledb group by teledb deptno ; deptno listagg + 20 aaa,bbb,ccc 21 ddd,eee (2 rows)

本页介绍天翼云TeleDB数据库Oracle语法中的二进制操作函数。 emptyclob 需要加载插件teledbxoraclepackagefunction plaintext create extension teledboraclepackagefunction; 初始化CLOB 字段。 plaintext teledb select emptyclob(); emptyclob (1 row) teledb create table t1 (f1 int,f2 clob); CREATE TABLE teledb insert into t1(f1,f2) values (1,emptyclob()); INSERT 0 1 teledb

本页介绍天翼云TeleDB数据库Oracle语法中的转换函数。 toclob 转换字符为clob类型。 plaintext teledb select toclob('teledb') from dual; toclob teledb (1 row) teledb ROWIDTOCHAR 转换rowid值为varchar2类型。 plaintext teledb d+ trowid Table "public.trowid" Column Type Collation Nullable Default Storage Stats target Descripti on +++++++ f1 integer plain f2 integer plain Has ROWIDs: yes Distribute By: SHARD(f1) Location Nodes: ALL DATANODES teledb SELECT ROWIDTOCHAR(rowid),rowid from trowid; rowidtochar rowid + XPK3fwAQAAAAAAAAA XPK3fwAQAAAAAAAAA (1 row) teledb CHARTOROWID CHARTOROWID(c1) 转换varchar2类型为rowid值，c1，字符串，长度为20的字符串，字符串必须符合rowid 格式。 plaintext teledb select CHARTOROWID('AAAFd1AAFAAAABSACCAA') a1 from dual; a1 AAAFdwFAAAABSACCA (1 row) teledb

本页介绍天翼云TeleDB数据库Oracle语法中的日期函数。 NUMTODSINTERVAL numtodsinterval( , ) x是一个数字、c是一个字符串，表明x的单位，这个函数把x转为interval day to second数据类型。 plaintext teledb select sysdate,sysdate+numtodsinterval(2,'hour') as res from dual; orclsysdate res + 20230824 10:49:53.417051 20230824 12:49:53.417051 (1 row) teledb DBTIMEZONE plaintext teledb select DBTIMEZONE from dual; dbtimezone 08:00:00 (1 row) teledb MONTHSBETWEEN plaintext teledb select monthsbetween(todate('20210331', 'yyyymmdd'), todate('20200131', 'yyyymmdd')) as months from dual; months 14 (1 row) teledb LASTDAY LASTDAY函数返回指定日期对应月份的最后一天。 plaintext teledb SELECT lastday('20200501') FROM dual; lastday 20200531 00:00:00+08 (1 row) teledb ADDMONTHS ADDMONTHS(x,y) x值为日期，y值为数量，用于计算某个日期向前或者向后y个月后的时间。 plaintext teledb select addmonths(sysdate,1) from dual; addmonths 20230924 11:08:17.194487 (1 row) teledb select addmonths(sysdate,1) from dual; addmonths 20230724 11:08:21.019573 (1 row) teledb

本页介绍天翼云TeleDB数据库PL/pgsql函数的返回值。 返回值可以是一个简单数据类型、复合类型、RECORD、已经存在的表行类型、表字段类型、游标、另外还可以返回一个记录集、如果不需要返回值，则可以用RETURN void。返回值的字段名及类型可以在参数OUT、INOUT模式中声明。

本文为您介绍如何删除索引。 plaintext teledb drop index tmulidxidx; DROP INDEX

本文为您介绍如何管理表达式索引。 plaintext teledb create table tupper(id int,mc text); CREATE TABLE teledb create index tuppermc on tupper(mc); CREATE INDEX teledb insert into tupper select t,md5(t::text) from generateseries(1,10000) as t; INSERT 0 10000 teledb analyze tupper; ANALYZE teledb explain select from tupper where upper(mc)md5('1'); QUERY PLAN Remote Fast Query Execution (cost0.00..0.00 rows0 width0) Node/s: dn01, dn02 > Seq Scan on tupper (cost0.00..133.58 rows25 width37) Filter: (upper(mc) 'c4ca4238a0b923820dcc509a6f75849b'::text) (4 rows) teledb create index tuppermc on tupper(upper(mc)); ERROR: relation "tuppermc" already exists teledb create index tuppermc1 on tupper(upper(mc)); CREATE INDEX teledb explain select from tupper where upper(mc)md5('1'); QUERY PLAN Remote Fast Query Execution (cost0.00..0.00 rows0 width0) Node/s: dn01, dn02 > Bitmap Heap Scan on tupper (cost4.48..50.94 rows25 width37) Recheck Cond: (upper(mc) 'c4ca4238a0b923820dcc509a6f75849b'::text) > Bitmap Index Scan on tuppermc1 (cost0.00..4.47 rows25 width0) Index Cond: (upper(mc) 'c4ca4238a0b923820dcc509a6f75849b'::text) (6 rows)

本文为您介绍如何使用查询结果创建数据表。 plaintext teledb insert into t values(1,'teledb'); INSERT 0 1 teledb create table tas as select from t; INSERT 0 1 teledb select from tas; id mc + 1 teledb (1 row)

本文为您介绍如何管理普通索引。 plaintext teledb create index tididx on t1 using btree(id); CREATE INDEX

本文为您介绍如何添加分区子表。 plaintext teledb d+ trange Table "public.trange" Column Type Collation Nullable Default Storage Stats target Description +++++++ f1 bigint plain f2 timestamp without time zone now() plain f3 integer plain Distribute By: SHARD(f1) Location Nodes: ALL DATANODES Partition By: RANGE(f3) Of Partitions: 3 Start With: 1 Interval Of Partition: 50 teledb alter table trange add partitions 2; ALTER TABLE teledb d+ trange Table "public.trange" Column Type Collation Nullable Default Storage Stats target Description +++++++ f1 bigint plain f2 timestamp without time zone now() plain f3 integer plain Distribute By: SHARD(f1) Location Nodes: ALL DATANODES Partition By: RANGE(f3) Of Partitions: 5 Start With: 1 Interval Of Partition: 50

本页介绍天翼云TeleDB数据库存储过程名的语法。 建立存储过程，模式名可以指定，也可以不指定，不指定则存放在当前模式下，如上面例子就没有指定模式名，则就存放在当前模式下，如下所示。 plaintext teledb select from pgnamespace; nspname nspowner nspacl ++ pgtoast 10 pgtemp1 10 pgtoasttemp1 10 pgcatalog 10 {teledbUC/teledb,U/teledb} public 10 {teledbUC/teledb,UC/teledb} informationschema 10 {teledbUC/teledb,U/teledb} (6 行记录) teledb show searchpath; searchpath "$user",public (1 行记录) teledb select pgnamespace.nspname,pgproc.prosrc from pgproc,pgnamespace where pgproc.pronamespacepgnamespace.oid and pgproc.proname'proc1'; nspname prosrc + public + begin + raise notice 'Hello，teledbpg';+ end; + (1 row) 因为$user模式不存在，所以存在public模式下。

本文为您介绍如何指定模式创建表。 plaintext teledb create table public.t1(id int,mc text); CREATE TABLE

本文介绍如何管理存储组，包括创建存储组、初始化创建sharding、删除存储组、修改存储组和查看存储组相关信息。 TeleDB中存储组将不同的dn节点组成不同的存储组，不同的存储组之间数据隔离。 创建存储组 将多个dn组成一个group plaintext 创建默认存储组 create default node group groupname with (dn1,dn2...) 创建普通存储组 create node group groupname with (dn1,dn2...) 初始化创建sharding 在存储组创建sharding之后，才能创建表，插入数据 plaintext teledb CREATE sharding group to group defaultgroup; CREATE SHARDING GROUP teledb clean sharding; CLEAN SHARDING 说明 TeleDB实例创建成功后，默认会将所有dn节点组成一个默认存储组defaultgroup 如果不存在默认存储组，则建表时需指定存储组 如果没有任何存储组，则不允许创建表 create sharding map创建的为主shard map, 当主shard map存在时，该命令会报错 主shard map已经存在时，后续新增一个存储组，需要通过下述命令创建扩展shard map plaintext teledb create extension sharding group to group group2; CREATE SHARDING GROUP 删除存储组 plaintext drop node group groupname 如果group中已经存在sharding，会抛出异常，需要先删除sharding； 如果group中存在表等对象，删除sharding也会失败，需先清空所有对象。 plaintext teledb drop node group defaultgroup; ERROR: shard info exist in group:defaultgroup groupoid:49156 删除sharding teledb drop sharding in group defaultgroup; ERROR: node group defaultgroup still has relations inside, please remove them first. 清空表和sharding之后可正常删除节点组 plaintext teledb

本文为您介绍如何创建分区表。 创建范围分区表 plaintext teledb create table trange (f1 bigint,f2 timestamp default now(), f3 integer) partition by range (f3) begin (1) step (50) partitions (3) distribute by shard(f1); CREATE TABLE teledb insert into trange(f1,f3) values(1,1),(2,50),(3,100),(2,110); COPY 4 teledb insert into trange(f1,f3) values(1,1),(2,50),(3,100),(2,110); COPY 4 teledb d+ trange; Table "public.trange" Column Type Collation Nullable Default Storage Stats target Description +++++++ f1 bigint plain f2 timestamp without time zone now() plain f3 integer plain Distribute By: SHARD(f1) Location Nodes: ALL DATANODES Partition By: RANGE(f3) Of Partitions: 3 Start With: 1 Interval Of Partition: 50 创建时间范围分区表 plaintext teledb create table ttimerange (f1 bigint, f2 timestamp ,f3 bigint) partition by range (f2) begin (timestamp without time zone '20170901 0:0:0') step (interval '1 month') partitions (12) distribute by shard(f1); CREATE TABLE teledb d+ ttimerange Table "public.ttimerange" Column Type Collation Nullable Default Storage Stats target Description +++++++ f1 bigint plain f2 timestamp without time zone plain f3 bigint plain Distribute By: SHARD(f1) Location Nodes: ALL DATANODES Partition By: RANGE(f2)

本文为您介绍如何删除模式。 plaintext teledb drop schema teledbschemaowner; DROP SCHEMA 当模式中存在对象时，则会删除失败，提示如下。 plaintext teledb create table teledbschemanew.test(id int); CREATE TABLE teledb drop schema teledbschemanew; ERROR: cannot drop schema teledbschemanew because other objects depend on it DETAIL: table teledbschemanew.test depends on schema teledbschemanew HINT: Use DROP ... CASCADE to drop the dependent objects too. 参考如下强制删除，会将模式中的对象也级联删除掉。 plaintext teledb drop schema teledbschemanew cascade; NOTICE: drop cascades to table teledbschemanew.test DROP SCHEMA

本文为您介绍json应用的相关操作。 创建json 类型字段表 plaintext teledb create table tjson(id int,fjson json); CREATE TABLE 插入数据 plaintext teledb insert into tjson values(1,'{"col1":1,"col2":"teledb"}'); INSERT 0 1 teledb insert into tjson values(2,'{"col1":1,"col2":"teledb","col3":"pgxz"}'); INSERT 0 1 teledb select from tjson; id fjson + 1 {"col1":1,"col2":"teledb"} 2 {"col1":1,"col2":"teledb","col3":"pgxz"} (2 rows) 通过键获得json对象域 plaintext teledb select fjson >'col2' as col2 ,fjson > 'col3' as col3 from tjson; col2 col3 + "teledb" "teledb" "pgxz" (2 rows) 以文本形式获取对象值 plaintext teledb select fjson >>'col2' as col2 ,fjson >> 'col3' as col3 from tjson; col2 col3 + teledb teledb pgxz (2 rows) teledb select fjson >>'col2' as col2 ,fjson >> 'col3' as col3 from tjson where fjson >> 'col3' is not null; col2 col3 + teledb pgxz (1 row)

本页介绍天翼云TeleDB数据库Oracle兼容语法的数据类型。 varchar2 plaintext teledb create table tvarchar2(f1 varchar2,f2 int); CREATE TABLE teledb d+ tvarchar2 Table "public.tvarchar2" Column Type Collation Nullable Default Storage Stats target Description +++++++ f1 varchar2 extended f2 integer plain Distribute By: SHARD(f1) Location Nodes: ALL DATANODES teledb number plaintext teledb create table tnumber(f1 number,f2 number(10),f3 number(10,2)); CREATE TABLE teledb d tnumber Table "public.tnumber" Column Type Collation Nullable Default ++++ f1 numeric f2 numeric(10,0) f3 numeric(10,2) 系统转换成numeric。 blob plaintext teledb create table tblob(f1 int,f2 Blob); CREATE TABLE teledb d tblob Table "public.tblob" Column Type Collation Nullable Default ++++ f1 integer f2 blob Teledb的blob类型支持最大长度为1G。 clob plaintext teledb create table tclob(f1 int,f2 clob); CREATE TABLE teledb d tclob Table "public.tclob" Column Type Collation Nullable Default ++++ f1 integer f2 clob TeleDB的clob类型支持最大长度为1G。

本文介绍如何在使用SELECT语法时，返回两个结果的交集。 plaintext teledb select from teledbpg intersect select from teledbpg1; id nickname + 3 pg (1 row)

本页介绍天翼云TeleDB数据库PL/pgsql的触发器函数。 INSERT事件触发器函数 函数功能实现字段值ttrigger.nc值重写。 plaintext teledb CREATE TABLE ttrigger teledb ( teledb( id integer NOT NULL, teledb( nc text NOT NULL teledb( ); CREATE TABLE teledb CREATE OR REPLACE FUNCTION ttriggerinserttriggerfunc() RETURNS trigger AS teledb $$ teledb$ BEGIN teledb$ IF NEW.nc '' THEN teledb$ NEW.nc 'teledbpg' random()::text; teledb$ END IF; teledb$ RETURN NEW; teledb$ END; teledb$ $$ teledb LANGUAGE plpgsql; CREATE FUNCTION teledb CREATE TRIGGER ttriggerinserttrigger BEFORE INSERT ON ttrigger FOR EACH ROW EXECUTE PROCEDURE ttriggerinserttriggerfunc(); CREATE TRIGGER teledb INSERT INTO ttrigger values(1,''); INSERT 0 1 teledb SELECT FROM ttrigger ; id nc + 1 teledbpg0.426093454472721 (1 row) 注意使用BEFORE，不能使用AFTER，否则重写失效。 UPDATE 事件触发器函数 不准许更新ttrigger.nc字段值为teledbpg。 plaintext teledb CREATE OR REPLACE FUNCTION ttriggerupdatetriggerfunc() RETURNS trigger AS teledb $$ teledb$ BEGIN teledb$ 不准许ttrigger.nc值为 teledbpg teledb$ IF NEW.nc 'teledbpg' THEN teledb$ NEW.nc OLD.nc ; teledb$ END IF; teledb$ RETURN NEW; teledb$ END; teledb$ $$ teledb LANGUAGE plpgsql; CREATE FUNCTION teledb CREATE TRIGGER ttriggerupdatetrigger BEFORE UPDATE ON ttrigger FOR EACH ROW EXECUTE PROCEDURE ttriggerupdatetriggerfunc(); CREATE TRIGGER teledb

本页介绍天翼云TeleDB数据库修改存储过程所属用户的语法。 修改不带参数的存储过程所属用户 plaintext teledb CREATE OR REPLACE PROCEDURE public.proc1() AS $$ begin raise notice 'Hello teledbpg'; end; $$ LANGUAGE PLPGSQL; CREATE PROCEDURE teledb alter procedure proc1() owner to teledbadmin; ALTER PROCEDURE teledb 修改带参数的存储过程所属用户 plaintext teledb CREATE OR REPLACE PROCEDURE proc1(aint int) AS $$ begin raise notice '%',aint; end; $$ LANGUAGE PLPGSQL; CREATE PROCEDURE teledb alter procedure proc1 (int) owner to teledbadmin; ALTER PROCEDURE teledb