Class: Sequel::Postgres::AlterTableGenerator

Inherits:
Schema::AlterTableGenerator show all
Defined in:
lib/sequel/adapters/shared/postgres.rb

Instance Attribute Summary

Attributes inherited from Schema::AlterTableGenerator

#operations

Instance Method Summary collapse

Methods inherited from Schema::AlterTableGenerator

#add_column, #add_constraint, #add_foreign_key, #add_full_text_index, #add_index, #add_primary_key, #add_spatial_index, #add_unique_constraint, #drop_column, #drop_constraint, #drop_foreign_key, #drop_index, #initialize, #rename_column, #set_column_allow_null, #set_column_default, #set_column_not_null, #set_column_type

Constructor Details

This class inherits a constructor from Sequel::Schema::AlterTableGenerator

Instance Method Details

#add_exclusion_constraint(elements, opts = OPTS) ⇒ Object

Adds an exclusion constraint to an existing table, see CreateTableGenerator#exclude.



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# File 'lib/sequel/adapters/shared/postgres.rb', line 142

def add_exclusion_constraint(elements, opts=OPTS)
  @operations << {:op => :add_constraint, :type => :exclude, :elements => elements}.merge!(opts)
end

#alter_constraint(name, opts = OPTS) ⇒ Object

Alter an existing constraint. Options:

:deferrable

Modify deferrable setting for constraint (PostgreSQL 9.4+):

true

DEFERRABLE INITIALLY DEFERRED

false

NOT DEFERRABLE

:immediate

DEFERRABLE INITIALLY IMMEDIATE

:enforced

Set true to use ENFORCED, or false to use NOT ENFORCED (PostgreSQL 18+)

:inherit

Set true to use INHERIT, or false to use NO INHERIT (PostgreSQL 18+)



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# File 'lib/sequel/adapters/shared/postgres.rb', line 153

def alter_constraint(name, opts=OPTS)
  @operations << {:op => :alter_constraint, :name => name}.merge!(opts)
end

#validate_constraint(name) ⇒ Object

Validate the constraint with the given name, which should have been added previously with NOT VALID.



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# File 'lib/sequel/adapters/shared/postgres.rb', line 159

def validate_constraint(name)
  @operations << {:op => :validate_constraint, :name => name}
end