1. 查看PostgreSQL表结构,数据量,是否有特殊字段值
region_il=# select count(*) from result_basic; count --------- 2611527(1 row)region_il=# \d result_basic Table "noco_il_16q1.result_basic" Column | Type | Modifiers -----------------------+-----------------------+----------- result_id | integer | not null ppid | character varying(24) | title | character varying | categories | integer[] | phone | character varying(24) | brand_code | character varying(24) | street_address | character varying | zip_code | character varying(24) | city | character varying | state | character varying(50) | country | character varying(50) | lat | double precision | lon | double precision | vendor_code | character varying(24) | vendor_poi_id | character varying(32) | actual_street_address | character varying | actual_zip_code | character varying(24) | extender | json | titles | json | Indexes: "result_basic_pkey" PRIMARY KEY, btree (result_id) "result_basic_vendor_poi_id_idx" btree (vendor_poi_id)region_il=# \xExpanded display is on.region_il=# select * from result_basic where result_id = 2;-[ RECORD 1 ]---------+---------------------------------------------result_id | 2ppid | SUK5QD9B7C16D826B26E5title | هندسة العمارة والديكورcategories | { 791}phone | brand_code | street_address | طريق الأمير مقرن بن عبدالعزيزzip_code | 42314city | المدينةstate | المدينةcountry | SAUlat | 24.47893lon | 39.65331vendor_code | NOCOvendor_poi_id | 1040248605actual_street_address | actual_zip_code | extender | {"sideOfStreet":"+","mapLinkId":"571732670"}titles | 2. 导出PostgreSQL表结构
$ pg_dump --verbose --schema-only --table=noco_il_16q1.result_basic region_il -f /usr/local/pgsql/dba/exp/result_basic_schema.sql
3. 导出PostgreSQL表的所有字段
region_il=# COPY result_basic TO '/usr/local/pgsql/dba/exp/result_basic.csv' WITH (DELIMITER '^',FORMAT csv,FORCE_QUOTE *); COPY 2611527
4. 将备份集传到MySQL数据库服务器
$ scp /usr/local/pgsql/dba/exp/result_basic* root@172.16.101.66:/usr/local/mysql/dba/imp/
5. 编辑表结构文件修改字段类型并创建MySQl表结构
region_il>source /usr/local/mysql/dba/imp/result_basic_schema.sql;region_il>desc result_basic;+-----------------------+-------------+------+-----+---------+-------+| Field | Type | Null | Key | Default | Extra |+-----------------------+-------------+------+-----+---------+-------+| result_id | int(11) | NO | PRI | NULL | || ppid | varchar(24) | YES | | NULL | || title | text | YES | | NULL | || categories | text | YES | | NULL | || phone | varchar(24) | YES | | NULL | || brand_code | varchar(24) | YES | | NULL | || street_address | text | YES | | NULL | || zip_code | varchar(24) | YES | | NULL | || city | text | YES | | NULL | || state | varchar(50) | YES | | NULL | || country | varchar(50) | YES | | NULL | || lat | double | YES | | NULL | || lon | double | YES | | NULL | || vendor_code | varchar(24) | YES | | NULL | || vendor_poi_id | varchar(32) | YES | MUL | NULL | || actual_street_address | text | YES | | NULL | || actual_zip_code | varchar(24) | YES | | NULL | || extender | text | YES | | NULL | || titles | text | YES | | NULL | |+-----------------------+-------------+------+-----+---------+-------+19 rows in set (0.01 sec)
6. 加载数据到MySQL表中
$ script /dev/null$ screen -S restore_dataenter password: Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 33Server version: 5.6.23-log MySQL Community Server (GPL)Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.region_il>LOAD DATA INFILE '/usr/local/mysql/dba/imp/result_basic.csv' INTO TABLE result_basic FIELDS TERMINATED BY '^' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n';Query OK, 2611527 rows affected (50 min 3.08 sec)Records: 2611527 Deleted: 0 Skipped: 0 Warnings: 0
7. 验证导入的数据
region_il>select count(*) from result_basic;+----------+| count(*) |+----------+| 2611527 |+----------+1 row in set (0.94 sec)region_il>select * from result_basic where result_id = 2\G*************************** 1. row *************************** result_id: 2 ppid: SUK5QD9B7C16D826B26E5 title: ????? ??????? ???????? categories: { 791} phone: brand_code: street_address: ???? ?????? ???? ?? ????????? zip_code: 42314 city: ??????? state: ??????? country: SAU lat: 24.47893 lon: 39.65331 vendor_code: NOCO vendor_poi_id: 1040248605actual_street_address: actual_zip_code: extender: {"sideOfStreet":"+","mapLinkId":"571732670"} titles: 1 row in set (0.05 sec)region_il>show variables like '%char%';+--------------------------+----------------------------------+| Variable_name | Value |+--------------------------+----------------------------------+| character_set_client | latin1 || character_set_connection | latin1 || character_set_database | utf8 || character_set_filesystem | binary || character_set_results | latin1 || character_set_server | latin1 || character_set_system | utf8 || character_sets_dir | /usr/local/mysql/share/charsets/ |+--------------------------+----------------------------------+8 rows in set (0.03 sec)region_il>set character_set_results = utf8;Query OK, 0 rows affected (0.02 sec)region_il>select * from result_basic where result_id = 2\G*************************** 1. row *************************** result_id: 2 ppid: SUK5QD9B7C16D826B26E5 title: هندسة العمارة والديكور categories: { 791} phone: brand_code: street_address: طريق الأمير مقرن بن عبدالعزيز zip_code: 42314 city: المدينة state: المدينة country: SAU lat: 24.47893 lon: 39.65331 vendor_code: NOCO vendor_poi_id: 1040248605actual_street_address: actual_zip_code: extender: {"sideOfStreet":"+","mapLinkId":"571732670"} titles: 1 row in set (0.00 sec)