| | 1 | require 'active_record/connection_adapters/abstract_adapter' |
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| | 2 | require 'frontbase' |
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| | 3 | |
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| | 4 | module ActiveRecord |
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| | 5 | |
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| | 6 | ### Hack around missing functionality |
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| | 7 | module Calculations |
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| | 8 | module ClassMethods |
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| | 9 | def construct_calculation_sql(aggregate, aggregate_alias, options) #:nodoc: |
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| | 10 | scope = scope(:find) |
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| | 11 | sql = "SELECT #{aggregate} AS #{aggregate_alias}" |
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| | 12 | sql << ", #{options[:group_field]} AS #{options[:group_alias]}" if options[:group] |
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| | 13 | sql << " FROM #{table_name} " |
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| | 14 | add_joins!(sql, options, scope) |
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| | 15 | add_conditions!(sql, options[:conditions], scope) |
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| | 16 | |
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| | 17 | # FrontBase requires a column reference for the GROUP BY and HAVING clauses |
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| | 18 | # Example: 'SELECT sum(credit_limit) AS sum_credit_limit, firm_id AS firm_id FROM accounts GROUP BY firm_id HAVING sum_credit_limit > 50' |
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| | 19 | sql << " GROUP BY #{options[:group_alias]}" if options[:group] |
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| | 20 | sql << " HAVING #{options[:having].gsub(aggregate,aggregate_alias)}" if options[:group] && options[:having] |
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| | 21 | sql << " ORDER BY #{options[:order]}" if options[:order] |
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| | 22 | add_limit!(sql, options) |
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| | 23 | sql |
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| | 24 | end |
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| | 25 | end |
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| | 26 | end |
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| | 27 | |
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| | 28 | class Base |
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| | 29 | |
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| | 30 | # FrontBase only supports one unnamed sequence per table |
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| | 31 | def self.set_sequence_name( value=nil, &block ) |
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| | 32 | end |
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| | 33 | |
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| | 34 | # Establishes a connection to the database that's used by all Active Record objects. |
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| | 35 | def self.frontbase_connection(config) # :nodoc: |
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| | 36 | config = config.symbolize_keys |
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| | 37 | database = config[:database] |
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| | 38 | port = config[:port] |
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| | 39 | host = config[:host] |
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| | 40 | username = config[:username] |
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| | 41 | password = config[:password] |
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| | 42 | dbpassword = config[:dbpassword] |
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| | 43 | session_name = config[:session_name] |
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| | 44 | |
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| | 45 | if dbpassword == nil |
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| | 46 | dbpassword = "" |
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| | 47 | end |
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| | 48 | |
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| | 49 | # Turn off colorization since it make tail/less output difficult |
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| | 50 | self.colorize_logging = false; |
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| | 51 | |
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| | 52 | |
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| | 53 | connection = FBSQL_Connect.connect(host, port, database, username, password, dbpassword,session_name) |
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| | 54 | ConnectionAdapters::FrontBaseAdapter.new(connection, logger, [host, port, database, username, password, dbpassword, session_name], config) |
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| | 55 | end |
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| | 56 | end |
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| | 57 | |
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| | 58 | module ConnectionAdapters |
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| | 59 | |
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| | 60 | class FrontBaseColumn < Column #:nodoc: |
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| | 61 | attr_reader :fb_autogen |
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| | 62 | |
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| | 63 | def initialize(base, name, type, typename, limit, precision, scale, default, nullable) |
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| | 64 | |
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| | 65 | @base, @name = base, name |
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| | 66 | @type = simplified_type(type,typename,limit) |
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| | 67 | @limit = limit |
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| | 68 | @precision, @scale = precision, scale |
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| | 69 | @default = default |
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| | 70 | @null = nullable == "YES" ? true : false |
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| | 71 | @text = [:string, :text].include? @type |
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| | 72 | @number = [:float, :integer].include? @type |
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| | 73 | @fb_autogen = false |
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| | 74 | if @default |
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| | 75 | @default.gsub!(/^'(.*)'$/,'\1') if @text |
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| | 76 | @fb_autogen = @default.include?("SELECT UNIQUE FROM") |
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| | 77 | if @type == :boolean then |
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| | 78 | @default = (@default == "TRUE") |
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| | 79 | elsif @type == :binary |
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| | 80 | if @default != "X''" |
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| | 81 | buffer = "" |
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| | 82 | @default.scan(/../) { |h| buffer << h.hex.chr } |
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| | 83 | @default = buffer |
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| | 84 | else |
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| | 85 | @default = "" |
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| | 86 | end |
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| | 87 | else |
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| | 88 | @default = type_cast(@default) |
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| | 89 | end |
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| | 90 | end |
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| | 91 | end |
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| | 92 | |
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| | 93 | def self.hex_encode(value) |
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| | 94 | retvalue = "" |
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| | 95 | value.each_byte do |b| |
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| | 96 | retvalue << sprintf("%02X", b) |
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| | 97 | end |
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| | 98 | retvalue |
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| | 99 | end |
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| | 100 | |
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| | 101 | def self.hex_decode(value) |
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| | 102 | retvalue = "" |
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| | 103 | value.scan(/../) do |h| |
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| | 104 | c = h.hex |
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| | 105 | retvalue << c.chr |
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| | 106 | end |
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| | 107 | retvalue |
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| | 108 | end |
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| | 109 | |
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| | 110 | private |
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| | 111 | def simplified_type(field_type, type_name,limit) |
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| | 112 | ret_type = :string |
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| | 113 | # puts "typecode: [#{field_type}] [#{type_name}]" |
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| | 114 | case field_type |
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| | 115 | when 1 then ret_type = :boolean # BOOLEAN |
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| | 116 | when 2 then ret_type = :integer # INTEGER |
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| | 117 | when 4 then ret_type = :float # FLOAT |
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| | 118 | when 10 then ret_type = :string # CHARACTER VARYING |
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| | 119 | when 11 then ret_type = :binary |
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| | 120 | when 12 then ret_type = :binary |
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| | 121 | when 13 then ret_type = :date |
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| | 122 | when 14 then ret_type = :time |
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| | 123 | when 16 then ret_type = :timestamp |
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| | 124 | when 22 then ret_type = :integer # TINYINT |
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| | 125 | else |
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| | 126 | puts "ERROR: Unknown typecode: [#{field_type}] [#{type_name}]" |
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| | 127 | end |
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| | 128 | ret_type |
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| | 129 | end |
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| | 130 | end |
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| | 131 | |
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| | 132 | class FrontBaseAdapter < AbstractAdapter |
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| | 133 | |
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| | 134 | def initialize(connection, logger, connection_options, config) |
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| | 135 | super(connection, logger) |
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| | 136 | @connection_options, @config = connection_options, config |
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| | 137 | @transaction_mode = :pessimistic |
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| | 138 | |
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| | 139 | # threaded_connections_test.rb will fail unless we set the session |
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| | 140 | # to optimistic locking mode |
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| | 141 | # set_pessimistic_transactions |
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| | 142 | # execute "SET TRANSACTION ISOLATION LEVEL REPEATABLE READ, READ WRITE, LOCKING OPTIMISTIC" |
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| | 143 | end |
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| | 144 | |
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| | 145 | # Returns the human-readable name of the adapter. Use mixed case - one |
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| | 146 | # can always use downcase if needed. |
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| | 147 | def adapter_name #:nodoc: |
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| | 148 | 'FrontBase' |
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| | 149 | end |
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| | 150 | |
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| | 151 | # Does this adapter support migrations? Backend specific, as the |
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| | 152 | # abstract adapter always returns +false+. |
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| | 153 | def supports_migrations? #:nodoc: |
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| | 154 | true |
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| | 155 | end |
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| | 156 | |
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| | 157 | def native_database_types #:nodoc |
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| | 158 | # !!! Lookup actual FB datatypes |
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| | 159 | { |
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| | 160 | :primary_key => "INTEGER DEFAULT UNIQUE PRIMARY KEY", |
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| | 161 | :string => { :name => "VARCHAR", :limit => 255 }, |
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| | 162 | :text => { :name => "VARCHAR", :limit => 1073741824 }, |
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| | 163 | :integer => { :name => "INTEGER" }, |
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| | 164 | :float => { :name => "FLOAT" }, |
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| | 165 | :datetime => { :name => "TIMESTAMP" }, |
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| | 166 | :timestamp => { :name => "TIMESTAMP" }, |
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| | 167 | :time => { :name => "TIME" }, |
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| | 168 | :date => { :name => "DATE" }, |
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| | 169 | :binary => { :name => "BYTE VARYING" }, |
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| | 170 | :boolean => { :name => "BOOLEAN" } |
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| | 171 | } |
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| | 172 | end |
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| | 173 | |
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| | 174 | |
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| | 175 | # QUOTING ================================================== |
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| | 176 | |
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| | 177 | # Quotes the column value to help prevent |
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| | 178 | # {SQL injection attacks}[http://en.wikipedia.org/wiki/SQL_injection]. |
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| | 179 | def quote(value, column = nil) |
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| | 180 | retvalue = "<INVALID>" |
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| | 181 | |
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| | 182 | # If a column was passed in, use column type information |
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| | 183 | if ! value.nil? |
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| | 184 | if column |
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| | 185 | case column.type |
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| | 186 | when :string, :text |
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| | 187 | if value.kind_of?(String) |
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| | 188 | retvalue = "'#{quote_string(value.to_s)}'" # ' (for ruby-mode) |
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| | 189 | else |
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| | 190 | retvalue = "'#{quote_string(value.to_yaml)}'" |
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| | 191 | end |
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| | 192 | when :integer |
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| | 193 | if value.kind_of?(TrueClass) |
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| | 194 | retvalue = '1' |
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| | 195 | elsif value.kind_of?(FalseClass) |
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| | 196 | retvalue = '0' |
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| | 197 | else |
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| | 198 | retvalue = value.to_i.to_s |
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| | 199 | end |
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| | 200 | when :float |
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| | 201 | retvalue = value.to_f.to_s |
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| | 202 | when :datetime, :timestamp |
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| | 203 | retvalue = "TIMESTAMP '#{value.strftime("%Y-%m-%d %H:%M:%S")}'" |
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| | 204 | when :time |
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| | 205 | retvalue = "TIME '#{value.strftime("%H:%M:%S")}'" |
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| | 206 | when :date |
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| | 207 | retvalue = "DATE '#{value.strftime("%Y-%m-%d")}'" |
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| | 208 | when :binary |
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| | 209 | s = value.unpack("H*")[0] |
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| | 210 | retvalue = "X'#{s}'" |
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| | 211 | when :boolean |
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| | 212 | retvalue = quoted_true if value.kind_of?(TrueClass) |
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| | 213 | retvalue = quoted_false if value.kind_of?(FalseClass) |
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| | 214 | else |
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| | 215 | raise "*** UNKNOWN TYPE: #{column.type.inspect}" |
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| | 216 | end # case |
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| | 217 | # Since we don't have column type info, make a best guess based |
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| | 218 | # on the Ruby class of the value |
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| | 219 | else |
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| | 220 | case value |
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| | 221 | when String |
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| | 222 | if column && column.type == :binary |
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| | 223 | s = value.unpack("H*")[0] |
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| | 224 | retvalue = "X'#{s}'" |
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| | 225 | elsif column && [:integer, :float].include?(column.type) |
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| | 226 | retvalue = value.to_s |
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| | 227 | else |
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| | 228 | retvalue = "'#{quote_string(value)}'" # ' (for ruby-mode) |
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| | 229 | end |
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| | 230 | when NilClass then retvalue = "NULL" |
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| | 231 | when TrueClass then retvalue = (column && column.type == :integer ? '1' : quoted_true) |
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| | 232 | when FalseClass then retvalue = (column && column.type == :integer ? '0' : quoted_false) |
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| | 233 | when Float, Fixnum, Bignum then retvalue = value.to_s |
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| | 234 | when Time, Date, DateTime |
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| | 235 | if column |
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| | 236 | case column.type |
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| | 237 | when :date then retvalue = "DATE '#{value.strftime("%Y-%m-%d")}'" |
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| | 238 | when :time then retvalue = "TIME '#{value.strftime("%H:%M:%S")}'" |
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| | 239 | when :timestamp then retvalue = "TIMESTAMP '#{value.strftime("%Y-%m-%d %H:%M:%S")}'" |
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| | 240 | else |
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| | 241 | raise NotImplementedError, "Unknown column type!" |
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| | 242 | end # case |
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| | 243 | else # Column wasn't passed in, so try to guess the right type |
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| | 244 | if value.kind_of? Date |
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| | 245 | retvalue = "DATE '#{value.strftime("%Y-%m-%d")}'" |
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| | 246 | else |
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| | 247 | if value.hour == 0 && value.min == 0 && value.sec == 0 |
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| | 248 | retvalue = "TIME '#{value.strftime("%H:%M:%S")}'" |
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| | 249 | else |
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| | 250 | retvalue = "TIMESTAMP '#{quoted_date(value)}'" |
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| | 251 | end |
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| | 252 | end |
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| | 253 | end #if column |
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| | 254 | else "'#{quote_string(value.to_yaml)}'" |
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| | 255 | end #case |
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| | 256 | end |
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| | 257 | else |
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| | 258 | retvalue = "NULL" |
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| | 259 | end |
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| | 260 | |
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| | 261 | retvalue |
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| | 262 | end # def |
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| | 263 | |
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| | 264 | # Quotes a string, escaping any ' (single quote) characters. |
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| | 265 | def quote_string(s) |
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| | 266 | s.gsub(/'/, "''") # ' (for ruby-mode) |
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| | 267 | end |
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| | 268 | |
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| | 269 | def quote_column_name(name) #:nodoc: |
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| | 270 | "\"#{name}\"" |
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| | 271 | end |
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| | 272 | |
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| | 273 | def quoted_true |
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| | 274 | "true" |
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| | 275 | end |
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| | 276 | |
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| | 277 | def quoted_false |
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| | 278 | "false" |
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| | 279 | end |
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| | 280 | |
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| | 281 | |
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| | 282 | # CONNECTION MANAGEMENT ==================================== |
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| | 283 | |
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| | 284 | def active? |
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| | 285 | retvalue = true |
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| | 286 | begin |
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| | 287 | retvalue = true if @connection.status == 1 |
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| | 288 | rescue => e |
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| | 289 | retvalue = false |
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| | 290 | end |
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| | 291 | retvalue |
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| | 292 | end |
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| | 293 | |
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| | 294 | def reconnect! |
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| | 295 | @connection.close rescue nil |
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| | 296 | |
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| | 297 | @connection = FBSQL_Connect.connect(@connection_options[0], |
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| | 298 | @connection_options[1], |
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| | 299 | @connection_options[2], |
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| | 300 | @connection_options[3], |
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| | 301 | @connection_options[4], |
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| | 302 | @connection_options[5], |
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| | 303 | @connection_options[6]) |
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| | 304 | end |
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| | 305 | |
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| | 306 | # Close this connection |
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| | 307 | def disconnect! |
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| | 308 | @connection.close rescue nil |
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| | 309 | @active = false |
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| | 310 | end |
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| | 311 | |
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| | 312 | # DATABASE STATEMENTS ====================================== |
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| | 313 | |
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| | 314 | # Returns an array of record hashes with the column names as keys and |
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| | 315 | # column values as values. |
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| | 316 | def select_all(sql, name = nil) #:nodoc: |
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| | 317 | fbsql = cleanup_fb_sql(sql) |
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| | 318 | retValue = [] |
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| | 319 | fbresult = execute(sql, name) |
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| | 320 | # puts "select_all SQL -> #{fbsql}" |
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| | 321 | columns = fbresult.columns |
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| | 322 | fbresult.each do |row| |
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| | 323 | # puts "SQL <- #{row.inspect}" |
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| | 324 | hashed_row = {} |
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| | 325 | colnum = 0 |
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| | 326 | row.each do |col| |
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| | 327 | hashed_row[columns[colnum]] = col |
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| | 328 | colnum += 1 |
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| | 329 | end |
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| | 330 | retValue << hashed_row |
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| | 331 | end |
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| | 332 | retValue |
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| | 333 | end |
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| | 334 | |
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| | 335 | def select_one(sql, name = nil) #:nodoc: |
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| | 336 | fbsql = cleanup_fb_sql(sql) |
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| | 337 | retValue = [] |
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| | 338 | fbresult = execute(fbsql, name) |
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| | 339 | # puts "SQL -> #{fbsql}" |
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| | 340 | columns = fbresult.columns |
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| | 341 | |
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| | 342 | fbresult.each do |row| |
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| | 343 | # puts "SQL <- #{row.inspect}" |
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| | 344 | hashed_row = {} |
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| | 345 | colnum = 0 |
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| | 346 | row.each do |col| |
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| | 347 | hashed_row[columns[colnum]] = col |
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| | 348 | colnum += 1 |
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| | 349 | end |
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| | 350 | retValue << hashed_row |
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| | 351 | break |
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| | 352 | end |
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| | 353 | fbresult.clear |
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| | 354 | retValue = retValue.first |
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| | 355 | end |
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| | 356 | |
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| | 357 | def query(sql, name = nil) #:nodoc: |
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| | 358 | fbsql = cleanup_fb_sql(sql) |
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| | 359 | # puts "SQL(query) -> #{fbsql}" |
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| | 360 | log(fbsql, name) { @connection.query(fbsql) } |
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| | 361 | rescue => e |
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| | 362 | puts "FB Exception: #{e.inspect}" |
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| | 363 | raise e |
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| | 364 | end |
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| | 365 | |
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| | 366 | def execute(sql, name = nil) #:nodoc: |
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| | 367 | fbsql = cleanup_fb_sql(sql) |
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| | 368 | # puts "SQL(execute) -> #{fbsql}" |
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| | 369 | log(fbsql, name) { @connection.query(fbsql) } |
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| | 370 | rescue ActiveRecord::StatementInvalid => e |
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| | 371 | a = e.message.scan(/Table name - \w* - exists/) |
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| | 372 | if a.length == 0 |
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| | 373 | raise e |
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| | 374 | end |
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| | 375 | end |
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| | 376 | |
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| | 377 | # Returns the last auto-generated ID from the affected table. |
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| | 378 | def insert(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) #:nodoc: |
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| | 379 | # puts "SQL -> #{sql.inspect}" |
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| | 380 | result = execute(sql, name) |
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| | 381 | id_value || pk |
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| | 382 | end |
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| | 383 | |
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| | 384 | # Executes the update statement and returns the number of rows affected. |
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| | 385 | def update(sql, name = nil) #:nodoc: |
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| | 386 | # puts "SQL -> #{sql.inspect}" |
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| | 387 | execute(sql, name).num_rows |
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| | 388 | end |
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| | 389 | |
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| | 390 | alias_method :delete, :update #:nodoc: |
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| | 391 | |
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| | 392 | def set_pessimistic_transactions |
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| | 393 | if @transaction_mode == :optimistic |
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| | 394 | execute "SET TRANSACTION ISOLATION LEVEL SERIALIZABLE, LOCKING PESSIMISTIC, READ WRITE" |
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| | 395 | @transaction_mode = :pessimistic |
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| | 396 | end |
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| | 397 | end |
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| | 398 | |
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| | 399 | def set_optimistic_transactions |
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| | 400 | if @transaction_mode == :pessimistic |
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| | 401 | execute "SET TRANSACTION ISOLATION LEVEL REPEATABLE READ, READ WRITE, LOCKING OPTIMISTIC" |
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| | 402 | @transaction_mode = :optimistic |
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| | 403 | end |
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| | 404 | end |
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| | 405 | |
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| | 406 | def begin_db_transaction #:nodoc: |
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| | 407 | execute "SET COMMIT FALSE" |
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| | 408 | rescue |
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| | 409 | end |
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| | 410 | |
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| | 411 | def commit_db_transaction #:nodoc: |
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| | 412 | execute "COMMIT" |
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| | 413 | ensure |
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| | 414 | execute "SET COMMIT TRUE" |
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| | 415 | end |
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| | 416 | |
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| | 417 | def rollback_db_transaction #:nodoc: |
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| | 418 | execute "ROLLBACK" |
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| | 419 | ensure |
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| | 420 | execute "SET COMMIT TRUE" |
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| | 421 | end |
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| | 422 | |
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| | 423 | def add_limit_offset!(sql, options) #:nodoc |
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| | 424 | if limit = options[:limit] |
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| | 425 | offset = options[:offset] || 0 |
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| | 426 | |
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| | 427 | # Here is the full syntax FrontBase supports: |
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| | 428 | # (from gclem@frontbase.com) |
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| | 429 | # |
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| | 430 | # TOP <limit - unsigned integer> |
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| | 431 | # TOP ( <offset expr>, <limit expr>) |
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| | 432 | |
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| | 433 | # "TOP 0" is not allowed, so we have |
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| | 434 | # to use a cheap trick. |
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| | 435 | if limit == 0 |
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| | 436 | if sql =~ /WHERE/i |
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| | 437 | sql.sub!(/WHERE/i, 'WHERE 0 = 1 AND ') |
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| | 438 | elsif |
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| | 439 | sql =~ /ORDER\s+BY/i |
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| | 440 | sql.sub!(/ORDER\s+BY/i, 'WHERE 0 = 1 ORDER BY') |
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| | 441 | else |
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| | 442 | sql << 'WHERE 0 = 1' |
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| | 443 | end |
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| | 444 | else |
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| | 445 | if offset == 0 |
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| | 446 | sql.replace sql.gsub("SELECT ","SELECT TOP #{limit} ") |
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| | 447 | else |
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| | 448 | sql.replace sql.gsub("SELECT ","SELECT TOP(#{offset},#{limit}) ") |
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| | 449 | end |
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| | 450 | end |
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| | 451 | |
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| | 452 | end |
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| | 453 | end |
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| | 454 | |
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| | 455 | def prefetch_primary_key?(table_name = nil) |
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| | 456 | true |
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| | 457 | end |
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| | 458 | |
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| | 459 | # Returns the next sequence value from a sequence generator. Not generally |
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| | 460 | # called directly; used by ActiveRecord to get the next primary key value |
|---|
| | 461 | # when inserting a new database record (see #prefetch_primary_key?). |
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| | 462 | def next_sequence_value(sequence_name) |
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| | 463 | unique = select_value("SELECT UNIQUE FROM #{sequence_name}","Next Sequence Value") |
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| | 464 | # The test cases cannot handle a zero primary key |
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| | 465 | if unique == 0 then unique = select_value("SELECT UNIQUE FROM #{sequence_name}","Next Sequence Value") end |
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| | 466 | unique |
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| | 467 | end |
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| | 468 | |
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| | 469 | def default_sequence_name(table, column) |
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| | 470 | table; |
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| | 471 | end |
|---|
| | 472 | |
|---|
| | 473 | # Set the sequence to the max value of the table's column. |
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| | 474 | def reset_sequence!(table, column, sequence = nil) |
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| | 475 | klasses = classes_for_table_name(table) |
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| | 476 | klass = klasses.nil? ? nil : klasses[0] |
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| | 477 | pk = klass.primary_key if klass != nil |
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| | 478 | if pk && klass.columns_hash[pk].type == :integer |
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| | 479 | execute("SET UNIQUE FOR #{klass.table_name}(#{pk})") |
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| | 480 | end |
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| | 481 | end |
|---|
| | 482 | |
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| | 483 | def classes_for_table_name(table) |
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| | 484 | klasses = [] |
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| | 485 | # !!! Hack because subclasses is a protected method... |
|---|
| | 486 | subclasses = ActiveRecord::Base.class_eval('@@subclasses') |
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| | 487 | subclasses.values.each do |a| |
|---|
| | 488 | a.each {|n| klasses << n} |
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| | 489 | end |
|---|
| | 490 | subset_klasses = klasses.select {|k| k.table_name == table} |
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| | 491 | end |
|---|
| | 492 | |
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| | 493 | def reset_pk_sequence!(table, pk = nil, sequence = nil) |
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| | 494 | klasses = classes_for_table_name(table) |
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| | 495 | klass = klasses.nil? ? nil : klasses[0] |
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| | 496 | pk = klass.primary_key if klass != nil |
|---|
| | 497 | if pk && klass.columns_hash[pk].type == :integer |
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| | 498 | mpk = select_value("SELECT MAX(#{pk}) FROM #{table}") |
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| | 499 | execute("SET UNIQUE FOR #{klass.table_name}(#{pk})") |
|---|
| | 500 | end |
|---|
| | 501 | |
|---|
| | 502 | end |
|---|
| | 503 | |
|---|
| | 504 | # SCHEMA STATEMENTS ======================================== |
|---|
| | 505 | |
|---|
| | 506 | def structure_dump #:nodoc: |
|---|
| | 507 | select_all("SHOW TABLES").inject("") do |structure, table| |
|---|
| | 508 | structure += select_one("SHOW CREATE TABLE #{table.to_a.first.last}")["Create Table"] + ";\n\n" |
|---|
| | 509 | end |
|---|
| | 510 | end |
|---|
| | 511 | |
|---|
| | 512 | def recreate_database(name) #:nodoc: |
|---|
| | 513 | drop_database(name) |
|---|
| | 514 | create_database(name) |
|---|
| | 515 | end |
|---|
| | 516 | |
|---|
| | 517 | def create_database(name) #:nodoc: |
|---|
| | 518 | execute "CREATE DATABASE #{name}" |
|---|
| | 519 | end |
|---|
| | 520 | |
|---|
| | 521 | def drop_database(name) #:nodoc: |
|---|
| | 522 | puts "TRACE: drop_database" |
|---|
| | 523 | execute "DROP DATABASE #{name}" |
|---|
| | 524 | end |
|---|
| | 525 | |
|---|
| | 526 | def current_database |
|---|
| | 527 | select_value('SELECT "CATALOG_NAME" FROM INFORMATION_SCHEMA.CATALOGS').downcase |
|---|
| | 528 | end |
|---|
| | 529 | |
|---|
| | 530 | def tables(name = nil) #:nodoc: |
|---|
| | 531 | sql = "SELECT \"TABLE_NAME\" FROM INFORMATION_SCHEMA.TABLES AS T0,INFORMATION_SCHEMA.SCHEMATA AS T1 WHERE T0.SCHEMA_PK = T1.SCHEMA_PK AND \"SCHEMA_NAME\" = CURRENT_SCHEMA" |
|---|
| | 532 | |
|---|
| | 533 | select_values(sql,nil) |
|---|
| | 534 | end |
|---|
| | 535 | |
|---|
| | 536 | def indexes(table_name, name = nil)#:nodoc: |
|---|
| | 537 | indexes = [] |
|---|
| | 538 | current_index = nil |
|---|
| | 539 | sql = "SELECT INDEX_NAME, T2.ORDINAL_POSITION ,INDEX_COLUMN_COUNT, INDEX_TYPE, \"COLUMN_NAME\", IS_NULLABLE FROM INFORMATION_SCHEMA.TABLES AS T0, INFORMATION_SCHEMA.INDEXES AS T1, INFORMATION_SCHEMA.INDEX_COLUMN_USAGE AS T2, INFORMATION_SCHEMA.COLUMNS AS T3 WHERE T0.\"TABLE_NAME\" = \'#{table_name}\' AND INDEX_TYPE <> 0 AND T0.TABLE_PK = T1.TABLE_PK AND T0.TABLE_PK = T2.TABLE_PK AND T0.TABLE_PK = T3.TABLE_PK AND T1. INDEXES_PK = T2.INDEX_PK AND T2.COLUMN_PK = T3.COLUMN_PK ORDER BY INDEX_NAME, T2.ORDINAL_POSITION" |
|---|
| | 540 | |
|---|
| | 541 | columns = [] |
|---|
| | 542 | query(sql).each do |row| |
|---|
| | 543 | index_name = row[0] |
|---|
| | 544 | ord_position = row[1] |
|---|
| | 545 | ndx_colcount = row[2] |
|---|
| | 546 | index_type = row[3] |
|---|
| | 547 | column_name = row[4] |
|---|
| | 548 | |
|---|
| | 549 | if index_type == 1 |
|---|
| | 550 | isUnique = true |
|---|
| | 551 | else |
|---|
| | 552 | isUnique = false |
|---|
| | 553 | end |
|---|
| | 554 | |
|---|
| | 555 | columns << column_name |
|---|
| | 556 | if ord_position == ndx_colcount |
|---|
| | 557 | indexes << IndexDefinition.new(table_name, index_name, isUnique , columns) |
|---|
| | 558 | columns = [] |
|---|
| | 559 | end |
|---|
| | 560 | end |
|---|
| | 561 | indexes |
|---|
| | 562 | end |
|---|
| | 563 | |
|---|
| | 564 | def columns(table_name, name = nil)#:nodoc: |
|---|
| | 565 | sql = "SELECT \"TABLE_NAME\", \"COLUMN_NAME\", ORDINAL_POSITION, IS_NULLABLE, COLUMN_DEFAULT, DATA_TYPE, DATA_TYPE_CODE, CHARACTER_MAXIMUM_LENGTH, NUMERIC_PRECISION, NUMERIC_PRECISION_RADIX, NUMERIC_SCALE, DATETIME_PRECISION, DATETIME_PRECISION_LEADING FROM INFORMATION_SCHEMA.TABLES T0, INFORMATION_SCHEMA.COLUMNS T1, INFORMATION_SCHEMA.DATA_TYPE_DESCRIPTOR T3 WHERE \"TABLE_NAME\" = '#{table_name}' AND T0.TABLE_PK = T1.TABLE_PK AND T0.TABLE_PK = T3.TABLE_OR_DOMAIN_PK AND T1.COLUMN_PK = T3.COLUMN_NAME_PK ORDER BY T1.ORDINAL_POSITION" |
|---|
| | 566 | rawresults = query(sql,name) |
|---|
| | 567 | columns = [] |
|---|
| | 568 | rawresults.each do |field| |
|---|
| | 569 | typestring = field[5] |
|---|
| | 570 | typecode = field[6] |
|---|
| | 571 | base = field[0] |
|---|
| | 572 | name = field[1] |
|---|
| | 573 | limit = field[7] |
|---|
| | 574 | precision = field[8] |
|---|
| | 575 | scale = field[9] |
|---|
| | 576 | default = field[4] |
|---|
| | 577 | nullable = field[3] |
|---|
| | 578 | columns << FrontBaseColumn.new(base, name, typecode, typestring, limit, precision, scale, default, nullable) |
|---|
| | 579 | end |
|---|
| | 580 | columns |
|---|
| | 581 | end |
|---|
| | 582 | |
|---|
| | 583 | def create_table(name, options = {}) |
|---|
| | 584 | table_definition = TableDefinition.new(self) |
|---|
| | 585 | table_definition.primary_key(options[:primary_key] || "id") unless options[:id] == false |
|---|
| | 586 | |
|---|
| | 587 | yield table_definition |
|---|
| | 588 | |
|---|
| | 589 | if options[:force] |
|---|
| | 590 | drop_table(name) rescue nil |
|---|
| | 591 | end |
|---|
| | 592 | |
|---|
| | 593 | create_sql = "CREATE#{' TEMPORARY' if options[:temporary]} TABLE " |
|---|
| | 594 | create_sql << "#{name} (" |
|---|
| | 595 | create_sql << table_definition.to_sql |
|---|
| | 596 | create_sql << ") #{options[:options]}" |
|---|
| | 597 | begin_db_transaction |
|---|
| | 598 | execute create_sql |
|---|
| | 599 | commit_db_transaction |
|---|
| | 600 | rescue ActiveRecord::StatementInvalid => e |
|---|
| | 601 | a = e.message.scan(/Table name - \w* - exists/) |
|---|
| | 602 | raise e if a.length == 0 |
|---|
| | 603 | end |
|---|
| | 604 | |
|---|
| | 605 | def rename_table(name, new_name) |
|---|
| | 606 | columns = columns(name) |
|---|
| | 607 | pkcol = columns.find {|c| c.fb_autogen} |
|---|
| | 608 | execute "ALTER TABLE NAME #{name} TO #{new_name}" |
|---|
| | 609 | if pkcol |
|---|
| | 610 | change_column_default(new_name,pkcol.name,"UNIQUE") |
|---|
| | 611 | begin_db_transaction |
|---|
| | 612 | mpk = select_value("SELECT MAX(#{pkcol.name}) FROM #{new_name}") |
|---|
| | 613 | mpk = 0 if mpk.nil? |
|---|
| | 614 | execute "SET UNIQUE=#{mpk} FOR #{new_name}" |
|---|
| | 615 | commit_db_transaction |
|---|
| | 616 | end |
|---|
| | 617 | end |
|---|
| | 618 | |
|---|
| | 619 | # Drops a table from the database. |
|---|
| | 620 | def drop_table(name) |
|---|
| | 621 | execute "DROP TABLE #{name} RESTRICT" |
|---|
| | 622 | rescue ActiveRecord::StatementInvalid => e |
|---|
| | 623 | a = e.message.scan(/Referenced TABLE - \w* - does not exist/) |
|---|
| | 624 | raise e if a.length == 0 |
|---|
| | 625 | end |
|---|
| | 626 | |
|---|
| | 627 | # Adds a new column to the named table. |
|---|
| | 628 | # See TableDefinition#column for details of the options you can use. |
|---|
| | 629 | def add_column(table_name, column_name, type, options = {}) |
|---|
| | 630 | add_column_sql = "ALTER TABLE #{table_name} ADD #{column_name} #{type_to_sql(type, options[:limit])}" |
|---|
| | 631 | options[:type] = type |
|---|
| | 632 | add_column_options!(add_column_sql, options) |
|---|
| | 633 | execute(add_column_sql) |
|---|
| | 634 | end |
|---|
| | 635 | |
|---|
| | 636 | def add_column_options!(sql, options) #:nodoc: |
|---|
| | 637 | default_value = quote(options[:default], options[:column]) |
|---|
| | 638 | if options[:default] |
|---|
| | 639 | if options[:type] == :boolean |
|---|
| | 640 | default_value = options[:default] == 0 ? quoted_false : quoted_true |
|---|
| | 641 | end |
|---|
| | 642 | end |
|---|
| | 643 | sql << " DEFAULT #{default_value}" unless options[:default].nil? |
|---|
| | 644 | sql << " NOT NULL" if options[:null] == false |
|---|
| | 645 | end |
|---|
| | 646 | |
|---|
| | 647 | # Removes the column from the table definition. |
|---|
| | 648 | # ===== Examples |
|---|
| | 649 | # remove_column(:suppliers, :qualification) |
|---|
| | 650 | def remove_column(table_name, column_name) |
|---|
| | 651 | execute "ALTER TABLE #{table_name} DROP #{column_name} RESTRICT" |
|---|
| | 652 | end |
|---|
| | 653 | |
|---|
| | 654 | def remove_index(table_name, options = {}) #:nodoc: |
|---|
| | 655 | execute "DROP INDEX #{index_name(table_name, options)}" |
|---|
| | 656 | end |
|---|
| | 657 | |
|---|
| | 658 | def change_column_default(table_name, column_name, default) #:nodoc: |
|---|
| | 659 | execute "ALTER TABLE #{table_name} ALTER COLUMN #{column_name} SET DEFAULT #{default}" if default != "NULL" |
|---|
| | 660 | end |
|---|
| | 661 | |
|---|
| | 662 | def change_column(table_name, column_name, type, options = {}) #:nodoc: |
|---|
| | 663 | change_column_sql = "ALTER COLUMN \"#{table_name}\".\"#{column_name}\" TO #{type_to_sql(type, options[:limit])}" |
|---|
| | 664 | execute(change_column_sql) |
|---|
| | 665 | change_column_sql = "ALTER TABLE \"#{table_name}\" ALTER COLUMN \"#{column_name}\"" |
|---|
| | 666 | |
|---|
| | 667 | default_value = quote(options[:default], options[:column]) |
|---|
| | 668 | if options[:default] |
|---|
| | 669 | if type == :boolean |
|---|
| | 670 | default_value = options[:default] == 0 ? quoted_false : quoted_true |
|---|
| | 671 | end |
|---|
| | 672 | end |
|---|
| | 673 | |
|---|
| | 674 | if default_value != "NULL" |
|---|
| | 675 | change_column_sql << " SET DEFAULT #{default_value}" |
|---|
| | 676 | execute(change_column_sql) |
|---|
| | 677 | end |
|---|
| | 678 | |
|---|
| | 679 | # change_column_sql = "ALTER TABLE #{table_name} CHANGE #{column_name} #{column_name} #{type_to_sql(type, options[:limit])}" |
|---|
| | 680 | # add_column_options!(change_column_sql, options) |
|---|
| | 681 | # execute(change_column_sql) |
|---|
| | 682 | end |
|---|
| | 683 | |
|---|
| | 684 | def rename_column(table_name, column_name, new_column_name) #:nodoc: |
|---|
| | 685 | execute "ALTER COLUMN NAME \"#{table_name}\".\"#{column_name}\" TO \"#{new_column_name}\"" |
|---|
| | 686 | end |
|---|
| | 687 | |
|---|
| | 688 | private |
|---|
| | 689 | |
|---|
| | 690 | # Clean up sql to make it something FrontBase can digest |
|---|
| | 691 | def cleanup_fb_sql(sql) #:nodoc: |
|---|
| | 692 | cleansql = sql.gsub("!=","<>") # Turn non-standard != into standard <> |
|---|
| | 693 | lines = cleansql.split("\n") |
|---|
| | 694 | lines = lines.select { |l| l.length > 0} # Strip blank lines |
|---|
| | 695 | lines = lines.select { |l| !(l =~ /^--/)} # Strip comments |
|---|
| | 696 | cleansql = lines.join("\n") |
|---|
| | 697 | cleansql |
|---|
| | 698 | end |
|---|
| | 699 | end |
|---|
| | 700 | end |
|---|
| | 701 | end |