Norway 20000.0 4 Mark 25 Rich-Mond 65000.0 5 David 27 Texas 85000.0 6 Kim 22 South-Hall 45000.0 7 'Mark', 25, 'Rich-Mond ', 65000.00 ); INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) VALUES (5, 'David', 27, 'Texas', 85000.00 ); INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) VALUES (6, 'Kim', Norway 20000.0 4 Mark 25 Rich-Mond 65000.0 5 David 27 Texas 85000.0 6 Kim 22 South-Hall 45000.0 7

���删��� ����������删���������������������������� ���������� David �������������David �������������� ���� ��������������纯��������David ����������������� ��� �������������� PieCloudDB ������ ����: o host�����������1**.***.*** o database name�������������openpie o user������������� david o password����� Token �������**** o port�������5432 54 �� �� Postgres Client psql -h ���� -U ��� -p ��� -d ����� ����� david �����PSQL ������� export PGOPTIONS='-c warehouse=cl***********' psql -h 1**.***.*** -p 5432 -U david -d openpie �� Python psycopg2 �� ��������

Improvement Fund and The Linux Foundation Authors Adam Korczynski David Korczynski <david@adalogics.com> Date: June 5, 2023 This report is licensed under Creative Commons 4.0 (CC Email Adam Korczynski Security Engineer, Ada Logics Adam@adalogics.com David Korczynski Security Researcher, Ada Logics David@adalogics.com The Vitess community members involved in audit were: Name

enqueue("john-buy-rice") 2 >>> q.enqueue("david-buy-keyboard") 3 最后， 按照先进先出顺序， 依次从队列中弹出相应的购买请求： >>> q.dequeue() 'peter-buy-milk' >>> q.dequeue() 'john-buy-rice' >>> q.dequeue() 'david-buy-keyboard' 可以看到， 队列弹出元素的顺序跟元素⼊队时的顺序是完全相同的： 队列弹出元素的顺序跟元素⼊队时的顺序是完全相同的： 最先是 "peter-buy-milk" 元素， 接着是 "john-buy-rice" 元素， 最后是 "david-buy-keyboard" 元素。 4.8 LLEN：获取列表的⻓度 ⽤户可以通过执⾏ LLEN 命令来获取列表的⻓度， 也即是列表包含的元素数量： LLEN list 图 4-16 ⼏个不同⻓度的列表 ⽐如对于图 4-16 所示的⼏个列表来说， peter.follow("tom") # peter 关注⼀些⽤户 >>> peter.follow("david") >>> peter.follow("mary") >>> jack.follow("tom") # jack 关注⼀些⽤户 >>> jack.follow("david") >>> jack.follow("lily") >>> common_following = Com

and loop to try the UPDATE again. END; END LOOP; END; $$ LANGUAGE plpgsql; SELECT merge_db(1, ’david’); SELECT merge_db(1, ’dennis’); This coding assumes the unique_violation error is caused by the INSERT schema-qualified when they should be. • Widen COPY FROM’s current-line-number counter from 32 to 64 bits (David Rowley) This avoids two problems with input exceeding 4G lines: COPY FROM WITH HEADER would drop OIDs when creating a new TOAST entry. • Change ANALYZE’s algorithm for updating pg_class.reltuples (David Gould) Previously, pages not actually scanned by ANALYZE were assumed to retain their old tuple density

and loop to try the UPDATE again. END; END LOOP; END; $$ LANGUAGE plpgsql; SELECT merge_db(1, ’david’); SELECT merge_db(1, ’dennis’); This coding assumes the unique_violation error is caused by the INSERT schema-qualified when they should be. • Widen COPY FROM’s current-line-number counter from 32 to 64 bits (David Rowley) This avoids two problems with input exceeding 4G lines: COPY FROM WITH HEADER would drop OIDs when creating a new TOAST entry. • Change ANALYZE’s algorithm for updating pg_class.reltuples (David Gould) Previously, pages not actually scanned by ANALYZE were assumed to retain their old tuple density

and loop to try the UPDATE again. END; END LOOP; END; $$ LANGUAGE plpgsql; SELECT merge_db(1, ’david’); SELECT merge_db(1, ’dennis’); This coding assumes the unique_violation error is caused by the INSERT to produce a wrapping element. • Improve performance of pg_timezone_names view (Tom Lane, David Rowley) • Fix sloppy handling of corner-case errors from lseek() and close() (Tom Lane) Neither for output. • Use correct daylight-savings rules for POSIX-style time zone names in MSVC builds (David Row- ley) The Microsoft MSVC build scripts neglected to install the posixrules file in the timezone

PostgreSQL 9.2 Documentation

and loop to try the UPDATE again. END; END LOOP; END; $$ LANGUAGE plpgsql; SELECT merge_db(1, ’david’); SELECT merge_db(1, ’dennis’); This coding assumes the unique_violation error is caused by the INSERT to produce a wrapping

element. • Improve performance of pg_timezone_names view (Tom Lane, David Rowley) • Fix sloppy handling of corner-case errors from lseek() and close() (Tom Lane) Neither for output. • Use correct daylight-savings rules for POSIX-style time zone names in MSVC builds (David Rowley) The Microsoft MSVC build scripts neglected to install the posixrules file in the timezone

PostgreSQL 9.1.24 Documentation

and loop to try the UPDATE again. END; END LOOP; END; $$ LANGUAGE plpgsql; SELECT merge_db(1, ’david’); SELECT merge_db(1, ’dennis’); This example assumes the unique_violation error is caused by the Meskes) • Fix psql to sanely handle URIs and conninfo strings as the first parameter to \connect (David Fetter, Andrew Dunstan, Álvaro Herrera) This syntax has been accepted (but undocumented) for a long Notes • Reject duplicate column names in the referenced-columns list of a FOREIGN KEY declaration (David Rowley) This restriction is per SQL standard. Previously we did not reject the case explicitly, but

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PostgreSQL 9.1 Documentation

and loop to try the UPDATE again. END; END LOOP; END; $$ LANGUAGE plpgsql; SELECT merge_db(1, ’david’); SELECT merge_db(1, ’dennis’); This example assumes the unique_violation error is caused by the Meskes) • Fix psql to sanely handle URIs and conninfo strings as the first parameter to \connect (David Fetter, Andrew Dunstan, Álvaro Herrera) This syntax has been accepted (but undocumented) for a long table. • Reject duplicate column names in the referenced-columns list of a FOREIGN KEY declaration (David Rowley) This restriction is per SQL standard. Previously we did not reject the case explicitly, but

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