Postgresql中的dataType 1.整数类型 smallint(int2) 2bytes integer(int,int4) 4bytes bigint(int8) 8bytes 2.任意精度数值 numeric(precision,scale),用于精确的货币和科学计算。 eg:23.5141,precision=6,scale-4 如果指定,precision最大值为1000,如果numeric中没有指定precious,小数点前最多有131072个数字,小数...
To store the whole numbers in PostgreSQL, you can use one of the following integer types: SMALLINT INTEGER BIGINT The following table illustrates the specification of each integer type: NameStorage SizeMinMax SMALLINT 2 bytes -32,768 +32,767 INTEGER 4 bytes -2,147,483,648 +2,147,483,647...
sql standard sqlserver postgresql postgresqlaliases description bigint bigint bigint int8 signed eight-byte integer:有符号8字节整数 bigserial serial8 autoinc
coerce_to_target_type函数最终调用了 INT 类型的输入函数int4in,转换过程发现字符串'abc'无法转为 INT。可以执行SELECT int4in('abc')语句直接复现该报错: postgres=# SELECT int4in('abc'); ERROR: invalid input syntax for type integer: "abc" 各种数据类型在语义分析阶段的处理流程是一致的,只是InputFun...
整数类型(integer types) 任意精度类型(arbitrary precision numbers) 浮点数类型(floating-point types) 序列类型(serial types) 金额类型(monetary types) 字符类型(character types) 二进制数据类型(binary data types) 日期/时间类型(date/time types) 布尔类型(boolean type) 枚举类型(enumerated types) 几何类型(...
SQL Data Types Numeric规则为SQL numeric类型,包含如下类型:integer【int4】、smallint【int2】、bigint【int8】、real【float4】、double precision【float8】、decimal【numeric】、numeric【numeric】、boolean【bool】。 Numeric: INT_P { $$ = SystemTypeName("int4"); $$->location = @1; } ...
Category - Network Address Type 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. ...
example_tbl"Column | Type | Collation | Nullable | Default | Storage | Compression | Stats target | Description---+---+---+---+---+---+---+---+---id | integer | | not null | | plain | | |notes | text | | ...
Add CREATE SEQUENCE AS command to create a sequence matching an integer data type (Peter Eisentraut) Allow the specification of a function name without arguments in DDL commands, if it is unique (Peter Eisentraut) Improve speed of VACUUM’s removal of trailing empty heap pages (Claudio Freire...
- We specified “book_id INT PRIMARY KEY” to create a column named book_id having integer data type, which would be a PRIMARY KEY. - Next, we specified“book_name VARCHAR NOT NULL”to create a column named book_name having data typeVARCHAR,which wouldn’t accept a null value. ...