![]() The name of an existing collation to be associated with a column with a range type. The schema and the name of a b-tree operator class for the subtype. The schema and the name of the element type that the range type will represent ranges of. The name of an existing collation to be associated with a column of a composite type.Ī string literal representing the textual label associated with one value of an enum type. Use the Length edit box to define the length of the field and use Scale edit box to define the number of digits after the decimal point. The name of an existing data type to become a column of the composite type. The name of an attribute (column) for the composite type. The function that converts the internal form of the type's modifier(s) to external textual form. Type Modifier Output Schema and Type Modifier Output Note: Support from PostgreSQL 8.3 or later. The function that converts an array of modifier(s) for the type into internal form. ![]() Type Modifier Input Schema and Type Modifier Input ![]() The function that performs statistical analysis for the data type. The function that converts data from the type's internal form to its external binary form. The function that converts data from the type's external binary form to its internal form. The Advanced tab is supported from PostgreSQL 7.4 or later. Note: Support from PostgreSQL 8.0 or later. Indicate that values of this data type are passed by value rather than by reference. If specified, must be plain, external, extended, or main the default is plain. If specified, it must be char, int2, int4, or double the default is int4. The storage alignment requirement of the data type. The delimiter character to be used between values in arrays made of this type. The type being created is an array this specifies the type of the array elements. The default assumption is that it is variable-length.Ĭheck this option if the type length is unknown. The function that converts data from the type's internal form to its external textual form.Ī numeric constant that specifies the length in bytes of the new type's internal representation. ![]() The function that converts data from the type's external textual form to its internal form. Note: Enum Type was added in PostgreSQL 8.3. Range types are data types representing a range of values of some element type (called the range's subtype). An example of an enum type might be the days of the week, or a set of status values for a piece of data. They are equivalent to the enum types in a number of programming languages. The user can access the component fields from SQL queries.Įnumerated (Enum) types are data types that are comprised of a static, predefined set of values with a specific order. A value of a composite type is a row or record of field values. A composite type is simply a list of base types with associated field names. For each scalar type, a corresponding array type is automatically created that can hold variable-size arrays of that scalar type.Ĭomposite types, or row types, are created whenever the user creates a table it's also possible to define a "stand-alone" composite type with no associated table. Base types are further subdivided into scalar and array types. PostgreSQL can only operate on such types through functions provided by the user and only understands the behavior of such types to the extent that the user describes them. They generally correspond to what are often known as abstract data types. (Because tables have associated data types, the type name must also be distinct from the name of any existing table in the same schema.) Click -> Type to open an object list for Type.īase types are those, like int4, that are implemented below the level of the SQL language (typically in a low-level language such as C). The type name must be distinct from the name of any existing type or domain in the same schema. Otherwise it is created in the current schema. If a schema name is given then the type is created in the specified schema. Type registers a new data type for use in the current database.
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