class CQL::DateColumn(Type)

Overview

A date-only column (Table#date). CQL::Date is Time, so the type alone cannot tell it from a timestamp; this column declares itself DATE on every adapter. AlterTable#add_column and change_column take a Crystal type, so Date there declares a timestamp.

Defined in:

column.cr

Constructors

Instance Method Summary

Instance methods inherited from class CQL::Column(Type)

copy_to(table : Table) : BaseColumn copy_to, expression(table_alias : String | Nil) : Expression::BaseColumn
expression : Expression::BaseColumn expression, size : Int32 | Nil size, strict_type strict_type, type type

Constructor methods inherited from class CQL::Column(Type)

new(name : Symbol, as_name : String | Nil = nil, null : Bool = false, default : DB::Any = nil, unique : Bool = false, size : Int32 | Nil = nil, index : Index | Nil = nil, version_number : Bool = false) new

Instance methods inherited from class CQL::BaseColumn

copy_to(table : Table) : BaseColumn copy_to

Constructor Detail

def self.new(name : Symbol, as_name : String | Nil = nil, null : Bool = false, default : DB::Any = nil, unique : Bool = false, size : Int32 | Nil = nil, index : Index | Nil = nil, version_number : Bool = false) #

Create a new column instance; the type is the class's type argument (Column(String)). Tables add columns with Table#column instead.

  • @param : name (Symbol) - The name of the column
  • @param : as_name (String, nil) - An optional alias for the column
  • @param : null (Bool) - Whether the column allows null values (default: false)
  • @param : default (DB::Any) - The default value for the column (default: nil)
  • @param : unique (Bool) - Whether the column should have a unique constraint (default: false)
  • @param : size (Int32, nil) - The size of the column (default: nil)
  • @param : index (Index, nil) - The index for the column (default: nil)
  • @param : version_number (Bool) - Whether this column is used for optimistic locking (default: false)

Example

column = CQL::Column(String).new(:name)

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Instance Method Detail

def copy_to(table : Table) : BaseColumn #
Description copied from class CQL::Column(Type)

A copy of this column owned by table (used for CTEs and derived tables).


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def type #

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