bit varying [ (n) ] varbit variable-length bit string:变长位串 boolean bit boolean bool logical boolean (true/false):布尔值 box rectangular box on a plane bytea binary data ("byte array") character varying
Network Address Types -https://www.postgresql.org/docs/10/static/datatype-net-types.html 10、二进制字符串类型 Bit String Types -https://www.postgresql.org/docs/10/static/datatype-bit.html 10、网络地址类型 Network Address Types -https://www.postgresql.org/docs/10/static/datatype-net-types....
SQL bit-field指定以下类型:bit【bit】、bit variation【varbit】。 /* SQL bit-field data types The following implements BIT() and BIT VARYING(). */ Bit: BitWithLength { $$ = $1; } | BitWithoutLength { $$ = $1; } BitWithLength: BIT opt_varying '(' expr_list ')' { char *typn...
bit binary bit [ (n) ] fixed-length bit string:定长位串 bit varying varbinary bit varying [ (n) ] varbit variable-length bit string:变长位串 boolean bit boolean bool logical boolean (true/false):布尔值 box rectangular box on a plane bytea binary data ("byte array") cha...
These Data Type stores store IPv4, IPv6, and MAC addresses. Category - Bit String Type Bit String Types are used to store bit masks. They are either 0 or 1. There are two bit types - bit(n) and bit varying(n), where n is a positive integer. ...
Bit-string types X unknown type typispreferred:这个字段和 typcategory是一起工作的,表示是否在 typcategory分类中首选的。 typisdefined:这个字段是类型能否使用的前提,标识数据类型是否被定义,false的话,根本无法使用。(大家可以将int4的 typis的fined改为false,然后用int4作为表的字段类型建表,会直接报错type int...
These PostgreSQL data types are not supported in Amazon Redshift. Arrays BIT, BIT VARYING BYTEA Composite Types Enumerated Types Geometric Types (Amazon Redshift implementation of geometric types differs from PostgreSQL) HSTORE JSON Network Address Types Numeric Types SERIAL, BIGSERIAL, SM...
databit：加载信息的位图 pgsysconf与pgsysconf_pretty 查看当前OS块大小及使用情况testdb=# select * from pgsysconf(); os_page_size | os_pages_free | os_total_pages ---+---+--- 4096 | 1190139 | 1997572(1 row)testdb=# select * from pgsysconf_pretty(); os_page_size | os_...
不支持BIT、VARBIT、GEOMETRY、UUID、TSQUERY、TSVECTOR、TXID_SNAPSHOT类型的数据同步。 不支持同步DATATYPE、SEQUENCE、INDEX、PROCEDURE、FUNCTION、VIEW、OPERATOR、DEFAULT_CONSTRAINT、UK、PK、RULE、DOMAIN、AGGREGATE、EXTENSION、FK、TRIGGER。 若待同步的表存在主键,则目标表的主键列需与源表一致;若待同步的表...
compiled by gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0, 64-bit (1 row)登录与登出数据库...