What's in a Name? ... 9/17/20 Copyright (c) 2020 by Walter E. Brown. All rights reserved. 1 1 Copyright © 2020 by W alter E. Brown. All rights reserved. First, thank you to someone special 1 What’s What’s in a Name? and What’s a Name In? Walter E. Brown, Ph.D. < webrown.cpp @ gmail.com > Edition: 2020-09-17. Copyright © 2020 by Walter E. Brown. All rights reserved. 2 A little about me • Confucius (paraphrase) The power of the name is the most elementary of all. — David Eddings, 1988 … and, as every wizard knows, once you have a thing's real name you have the first step to its taming

CHECKSUM TABLE t_order CHECK TABLE t_order SET RESOURCE GROUP group_name DROP RESOURCE GROUP group_name CREATE RESOURCE GROUP group_name TYPE = SYSTEM ALTER RESOURCE GROUP rg1 VCPU = 0‐63 openGauss The runs rightly in single‐node databases may not be right in the sharding database. The change of table name after sharding, or misconducts caused by operations such as pagination, order by or aggregated group provided for dif‐ ferent data sharding requirements by Apache ShardingSphere. Logic Table The logical name of the horizontal sharding databases (tables) with the same schema, it is the logical table identification

CHECKSUM TABLE t_order CHECK TABLE t_order SET RESOURCE GROUP group_name DROP RESOURCE GROUP group_name CREATE RESOURCE GROUP group_name TYPE = SYSTEM ALTER RESOURCE GROUP rg1 VCPU = 0‐63 Source Codes: runs rightly in single‐node databases may not be right in the sharding database. The change of table name after sharding, or misconducts caused by operations such as pagination, order by or aggregated group ShardingSphere. 4.3. Sharding 27 Apache ShardingSphere document, v5.1.2 Logic Table The logical name of the horizontal sharding databases (tables) with the same schema, it is the logical table identification

CHECKSUM TABLE t_order CHECK TABLE t_order SET RESOURCE GROUP group_name DROP RESOURCE GROUP group_name CREATE RESOURCE GROUP group_name TYPE = SYSTEM ALTER RESOURCE GROUP rg1 VCPU = 0‐63 4.1. DB Compatibility runs rightly in single‐node databases may not be right in the sharding database. The change of table name after sharding, or misconducts caused by operations such as pagination, order by or aggregated group provided for dif‐ ferent data sharding requirements by Apache ShardingSphere. Logic Table The logical name of the horizontal sharding databases (tables) with the same schema, it is the logical table identification

StandalonePersistRepository . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293 Fully‐qualified class name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293 Definition . . . . . . . . . . . ClusterPersistRepository . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294 Fully‐qualified class name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294 Definition . . . . . . . . . . . GovernanceWatcher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294 Fully‐qualified class name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294 Definition . . . . . . . . . . .

StandalonePersistRepository . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320 Fully‐qualified class name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320 Definition . . . . . . . . . . . ClusterPersistRepository . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321 Fully‐qualified class name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321 Definition . . . . . . . . . . . GovernanceWatcher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321 Fully‐qualified class name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321 Definition . . . . . . . . . . .

runs rightly in single‐node databases may not be right in the sharding database. The change of table name after sharding, or misconducts caused by operations such as pagination, order by or aggregated group according to the last number of the primary key, and they are from t_order_0 to t_order_9, whose logic name is t_order. Actual Table The physical table that really exists in the sharding database, i.e., t_order_0 document, v5.0.0-beta Data Node As the smallest unit of sharding, it consists of data source name and table name, e.g. ds_0.t_order_0. Binding Table It refers to the primary table and the joiner table with

sqlite>.timer on sqlite> Above setting will produce the output in the following format: ID NAME AGE ADDRESS SALARY ---------- ---------- ---------- ---------- ---------- This will produce the following result: CREATE TABLE sqlite_master ( type text, name text, tbl_name text, rootpage integer, sql text ); TUTORIALS POINT Simply Easy Learning database_name; or ANALYZE database_name.table_name; CHAPTER 4 TUTORIALS POINT Simply Easy Learning SQLite AND/OR Clause: SELECT column1, column2....columnN FROM table_name WHERE CONDITION-1

по форме на имена переменных в обычных языках программирования, и имена с разделителями (delimited name), которые являются отличительной особенностью языка SQL. Обычное имя должно начинаться с буквы латинского FuLlNaMe Структура языка 25 FullName Синтаксис: <name> ::= | <name> | <name> | <name>_ | <name>$ ::= | с разделителем доступны только в диалекте 3. Подробнее о диалектах см. Диалекты SQL name> ::= "[ …]" Следует иметь в виду, что конечные

follows: 2.3.1. Rules for Regular Object Identifiers • Length cannot exceed 63 characters • The name must start with an unaccented, 7-bit ASCII alphabetic character. It may be followed by other 7-bit letters, digits, underscores or dollar signs. No other characters, including spaces, are valid. The name is case-insensitive, meaning it can be declared and used in either upper or lower case. Thus, from are the same: fullname FULLNAME FuLlNaMe FullName Regular name syntax <name> ::= | <name> | <name> | <name>_ | <name>$ ::= |