2 module ConnectionAdapters
3 module SchemaStatements
4 def quote_column_names(column_name)
5 Array(column_name).map { |e| quote_column_name(e) }.join(", ")
8 def add_primary_key(table_name, column_name, options = {})
9 column_names = Array(column_name)
10 quoted_column_names = column_names.map { |e| quote_column_name(e) }.join(", ")
11 execute "ALTER TABLE #{table_name} ADD PRIMARY KEY (#{quoted_column_names})"
14 def remove_primary_key(table_name)
15 execute "ALTER TABLE #{table_name} DROP PRIMARY KEY"
18 def add_foreign_key(table_name, column_name, reftbl, refcol = nil)
19 execute "ALTER TABLE #{table_name} ADD " +
20 "FOREIGN KEY (#{quote_column_names(column_name)}) " +
21 "REFERENCES #{reftbl} (#{quote_column_names(refcol || column_name)})"
24 def remove_foreign_key(table_name, column_name, reftbl, refcol = nil)
25 execute "ALTER TABLE #{table_name} DROP " +
26 "CONSTRAINT #{table_name}_#{column_name[0]}_fkey"
29 alias_method :old_options_include_default?, :options_include_default?
31 def options_include_default?(options)
32 return false if options[:options] =~ /AUTO_INCREMENT/i
33 return old_options_include_default?(options)
36 alias_method :old_add_column_options!, :add_column_options!
38 def add_column_options!(sql, options)
39 sql << " UNSIGNED" if options[:unsigned]
40 old_add_column_options!(sql, options)
41 sql << " #{options[:options]}"
45 class PostgreSQLAdapter
46 alias_method :old_native_database_types, :native_database_types
48 def native_database_types
49 types = old_native_database_types
50 types[:double] = { :name => "double precision" }
51 types[:integer_pk] = { :name => "serial PRIMARY KEY" }
52 types[:bigint_pk] = { :name => "bigserial PRIMARY KEY" }
53 types[:bigint_pk_64] = { :name => "bigserial PRIMARY KEY" }
54 types[:bigint_auto_64] = { :name => "bigint" } #fixme: need autoincrement?
55 types[:bigint_auto_11] = { :name => "bigint" } #fixme: need autoincrement?
56 types[:bigint_auto_20] = { :name => "bigint" } #fixme: need autoincrement?
57 types[:four_byte_unsigned] = { :name => "bigint" } # meh
58 types[:inet] = { :name=> "inet" }
60 enumerations.each_key do |e|
61 types[e.to_sym]= { :name => e }
68 return { :id => false, :force => true, :options => ""}
72 return { :id => false, :force => true, :options => ""}
79 def change_engine (table_name, engine)
82 def add_fulltext_index (table_name, column)
83 execute "CREATE INDEX #{table_name}_#{column}_idx on #{table_name} (#{column})"
87 @enumerations ||= Hash.new
90 def create_enumeration(enumeration_name, values)
91 enumerations[enumeration_name] = values
92 execute "CREATE TYPE #{enumeration_name} AS ENUM ('#{values.join '\',\''}')"
95 def drop_enumeration(enumeration_name)
96 execute "DROP TYPE #{enumeration_name}"
97 enumerations.delete(enumeration_name)
100 def rename_enumeration(old_name, new_name)
101 execute "ALTER TYPE #{quote_table_name(old_name)} RENAME TO #{quote_table_name(new_name)}"
104 def alter_primary_key(table_name, new_columns)
105 execute "ALTER TABLE #{table_name} DROP CONSTRAINT #{table_name}_pkey"
106 execute "ALTER TABLE #{table_name} ADD PRIMARY KEY (#{new_columns.join(',')})"
109 def interval_constant(interval)
110 "'#{interval}'::interval"
113 def add_index(table_name, column_name, options = {})
114 column_names = Array(column_name)
115 index_name = index_name(table_name, :column => column_names)
117 if Hash === options # legacy support, since this param was a string
118 index_type = options[:unique] ? "UNIQUE" : ""
119 index_name = options[:name] || index_name
120 index_method = options[:method] || "BTREE"
125 quoted_column_names = column_names.map { |e| quote_column_name(e) }
126 if Hash === options and options[:lowercase]
127 quoted_column_names = quoted_column_names.map { |e| "LOWER(#{e})" }
129 quoted_column_names = quoted_column_names.join(", ")
131 execute "CREATE #{index_type} INDEX #{quote_column_name(index_name)} ON #{quote_table_name(table_name)} USING #{index_method} (#{quoted_column_names})"
134 def rename_index(table_name, old_name, new_name)
135 execute "ALTER INDEX #{quote_table_name(old_name)} RENAME TO #{quote_table_name(new_name)}"