Class: Pcrd::Schema::Column

Inherits:
Object
  • Object
show all
Defined in:
lib/pcrd/schema/column.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(attnum:, name:, type_name:, formatted_type:, alignment:, fixed_size:, nullable:, default_expr:) ⇒ Column

alignment: Integer (1, 2, 4, or 8 bytes) fixed_size: Integer bytes, or nil for variable-length



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# File 'lib/pcrd/schema/column.rb', line 11

def initialize(attnum:, name:, type_name:, formatted_type:,
               alignment:, fixed_size:, nullable:, default_expr:)
  @attnum         = attnum
  @name           = name
  @type_name      = type_name
  @formatted_type = formatted_type
  @alignment      = alignment
  @fixed_size     = fixed_size
  @nullable       = nullable
  @default_expr   = default_expr
end

Instance Attribute Details

#alignment ⇒ Object (readonly)

Returns the value of attribute alignment.



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# File 'lib/pcrd/schema/column.rb', line 6

def alignment
  @alignment
end

#attnum ⇒ Object (readonly)

Returns the value of attribute attnum.



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# File 'lib/pcrd/schema/column.rb', line 6

def attnum
  @attnum
end

#default_expr ⇒ Object (readonly)

Returns the value of attribute default_expr.



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# File 'lib/pcrd/schema/column.rb', line 6

def default_expr
  @default_expr
end

#fixed_size ⇒ Object (readonly)

Returns the value of attribute fixed_size.



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# File 'lib/pcrd/schema/column.rb', line 6

def fixed_size
  @fixed_size
end

#formatted_type ⇒ Object (readonly)

Returns the value of attribute formatted_type.



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# File 'lib/pcrd/schema/column.rb', line 6

def formatted_type
  @formatted_type
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/pcrd/schema/column.rb', line 6

def name
  @name
end

#nullable ⇒ Object (readonly)

Returns the value of attribute nullable.



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# File 'lib/pcrd/schema/column.rb', line 6

def nullable
  @nullable
end

#type_name ⇒ Object (readonly)

Returns the value of attribute type_name.



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# File 'lib/pcrd/schema/column.rb', line 6

def type_name
  @type_name
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/pcrd/schema/column.rb', line 50

def ==(other)
  other.is_a?(Column) && name == other.name && type_name == other.type_name
end

#display_alignment ⇒ Object 



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# File 'lib/pcrd/schema/column.rb', line 46

def display_alignment
  "#{alignment}B"
end

#display_size ⇒ Object 



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# File 'lib/pcrd/schema/column.rb', line 42

def display_size
  fixed_size ? fixed_size.to_s : "variable"
end

#display_type ⇒ Object

Human-readable type string, with common verbose PG names shortened.



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# File 'lib/pcrd/schema/column.rb', line 32

def display_type
  formatted_type
    .sub("character varying", "varchar")
    .sub("character(", "char(")
    .sub("timestamp without time zone", "timestamp")
    .sub("timestamp with time zone", "timestamptz")
    .sub("time without time zone", "time")
    .sub("time with time zone", "timetz")
end

#fixed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pcrd/schema/column.rb', line 27

def fixed?
  !variable?
end

#inspect ⇒ Object 



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# File 'lib/pcrd/schema/column.rb', line 54

def inspect
  "#<Pcrd::Schema::Column #{name}:#{display_type} align=#{alignment} size=#{display_size}>"
end

#variable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pcrd/schema/column.rb', line 23

def variable?
  fixed_size.nil?
end