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jbe/bsw@0
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1 #!/usr/bin/env lua
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jbe/bsw@0
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2
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jbe/bsw@0
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3 local _G = _G
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jbe/bsw@0
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4 local _VERSION = _VERSION
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jbe/bsw@0
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5 local assert = assert
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jbe/bsw@0
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6 local error = error
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jbe/bsw@0
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7 local getmetatable = getmetatable
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jbe/bsw@0
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8 local ipairs = ipairs
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jbe/bsw@0
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9 local next = next
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jbe/bsw@0
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10 local pairs = pairs
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jbe/bsw@0
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11 local print = print
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jbe/bsw@0
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12 local rawequal = rawequal
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jbe/bsw@0
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13 local rawget = rawget
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jbe@64
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14 local rawlen = rawlen
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jbe/bsw@0
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15 local rawset = rawset
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jbe/bsw@0
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16 local select = select
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jbe/bsw@0
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17 local setmetatable = setmetatable
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jbe/bsw@0
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18 local tonumber = tonumber
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jbe/bsw@0
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19 local tostring = tostring
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jbe/bsw@0
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20 local type = type
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jbe/bsw@0
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21
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jbe/bsw@0
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22 local math = math
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jbe/bsw@0
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23 local string = string
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jbe@64
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24 local table = table
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jbe/bsw@0
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25
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jbe/bsw@0
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26 local mondelefant = require("mondelefant")
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jbe/bsw@0
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27 local atom = require("atom")
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jbe@177
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28 local json = require("json")
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jbe/bsw@0
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29
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jbe@64
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30 local _M = {}
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jbe@64
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31 if _ENV then
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jbe@64
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32 _ENV = _M
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jbe@64
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33 else
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jbe@64
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34 _G[...] = _M
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jbe@64
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35 setfenv(1, _M)
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jbe@64
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36 end
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jbe/bsw@0
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37
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jbe/bsw@0
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38
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jbe/bsw@0
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39 input_converters = setmetatable({}, { __mode = "k" })
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jbe/bsw@0
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40
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jbe/bsw@0
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41 input_converters["boolean"] = function(conn, value)
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jbe/bsw@0
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42 if value then return "TRUE" else return "FALSE" end
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jbe/bsw@0
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43 end
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jbe/bsw@0
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44
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jbe/bsw@0
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45 input_converters["number"] = function(conn, value)
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jbe@490
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46 if _VERSION == "Lua 5.2" then
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jbe@490
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47 -- TODO: remove following compatibility hack to allow large integers (e.g. 1e14) in Lua 5.2
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jbe@490
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48 local integer_string = string.format("%i", value)
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jbe@490
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49 if tonumber(integer_string) == value then
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jbe@490
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50 return integer_string
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jbe@419
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51 else
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jbe@490
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52 local number_string = tostring(value)
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jbe@490
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53 if string.find(number_string, "^[0-9.e+-]+$") then
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jbe@490
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54 return number_string
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jbe@490
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55 else
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jbe@490
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56 return "'NaN'"
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jbe@490
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57 end
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jbe@419
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58 end
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jbe/bsw@0
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59 end
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jbe@490
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60 local integer = math.tointeger(value)
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jbe@490
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61 if integer then
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jbe@490
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62 return tostring(integer)
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jbe@490
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63 end
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jbe@490
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64 local str = tostring(value)
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jbe@490
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65 if string.find(str, "^[0-9.e+-]+$") then
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jbe@490
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66 return str
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jbe@490
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67 end
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jbe@490
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68 return "'NaN'"
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jbe/bsw@0
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69 end
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jbe/bsw@0
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70
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jbe/bsw@0
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71 input_converters[atom.fraction] = function(conn, value)
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jbe/bsw@0
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72 if value.invalid then
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jbe/bsw@0
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73 return "'NaN'"
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jbe/bsw@0
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74 else
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jbe/bsw@0
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75 local n, d = tostring(value.numerator), tostring(value.denominator)
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jbe/bsw@0
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76 if string.find(n, "^%-?[0-9]+$") and string.find(d, "^%-?[0-9]+$") then
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jbe/bsw@0
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77 return "(" .. n .. "::numeric / " .. d .. "::numeric)"
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jbe/bsw@0
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78 else
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jbe/bsw@0
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79 return "'NaN'"
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jbe/bsw@0
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80 end
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jbe/bsw@0
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81 end
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jbe/bsw@0
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82 end
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jbe/bsw@0
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83
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jbe/bsw@0
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84 input_converters[atom.date] = function(conn, value)
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jbe/bsw@0
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85 return conn:quote_string(tostring(value)) .. "::date"
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jbe/bsw@0
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86 end
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jbe/bsw@0
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87
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jbe/bsw@0
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88 input_converters[atom.timestamp] = function(conn, value)
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jbe/bsw@0
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89 return conn:quote_string(tostring(value)) -- don't define type
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jbe/bsw@0
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90 end
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jbe/bsw@0
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91
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jbe/bsw@0
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92 input_converters[atom.time] = function(conn, value)
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jbe/bsw@0
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93 return conn:quote_string(tostring(value)) .. "::time"
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jbe/bsw@0
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94 end
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jbe/bsw@0
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95
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jbe@548
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96 input_converters["table"] = function(conn, value) -- integer and text arrays
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jbe@548
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97 -- TODO: support more types
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jbe@548
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98 local parts = { "{" }
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jbe@548
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99 for i, v in ipairs(value) do
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jbe@548
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100 if i > 1 then parts[#parts+1] = "," end
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jbe@548
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101 parts[#parts+1] = '"'
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jbe@548
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102 parts[#parts+1] = string.gsub(tostring(v), '[\\"]', '\\%0')
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jbe@548
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103 parts[#parts+1] = '"'
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jbe@548
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104 end
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jbe@548
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105 parts[#parts+1] = "}"
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jbe@548
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106 return conn:quote_string(table.concat(parts))
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jbe@548
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107 end
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jbe@548
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108
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jbe/bsw@0
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109
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jbe/bsw@0
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110 output_converters = setmetatable({}, { __mode = "k" })
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jbe/bsw@0
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111
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jbe/bsw@0
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112 output_converters.int8 = function(str) return atom.integer:load(str) end
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jbe/bsw@0
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113 output_converters.int4 = function(str) return atom.integer:load(str) end
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jbe/bsw@0
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114 output_converters.int2 = function(str) return atom.integer:load(str) end
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jbe/bsw@0
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115
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jbe/bsw@0
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116 output_converters.numeric = function(str) return atom.number:load(str) end
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jbe/bsw@0
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117 output_converters.float4 = function(str) return atom.number:load(str) end
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jbe/bsw@0
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118 output_converters.float8 = function(str) return atom.number:load(str) end
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jbe/bsw@0
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119
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jbe/bsw@0
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120 output_converters.bool = function(str) return atom.boolean:load(str) end
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jbe/bsw@0
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121
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jbe/bsw@0
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122 output_converters.date = function(str) return atom.date:load(str) end
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jbe/bsw@0
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123
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jbe@548
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124 local function timestamp_loader_func(str)
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jbe@1
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125 local year, month, day, hour, minute, second = string.match(
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jbe/bsw@0
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126 str,
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jbe@1
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127 "^([0-9][0-9][0-9][0-9])%-([0-9][0-9])%-([0-9][0-9]) ([0-9]?[0-9]):([0-9][0-9]):([0-9][0-9])"
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jbe/bsw@0
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128 )
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jbe@1
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129 if year then
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jbe/bsw@0
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130 return atom.timestamp{
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jbe@1
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131 year = tonumber(year),
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jbe@1
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132 month = tonumber(month),
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jbe@1
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133 day = tonumber(day),
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jbe/bsw@0
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134 hour = tonumber(hour),
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jbe/bsw@0
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135 minute = tonumber(minute),
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jbe/bsw@0
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136 second = tonumber(second)
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jbe/bsw@0
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137 }
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jbe/bsw@0
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138 else
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jbe/bsw@0
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139 return atom.timestamp.invalid
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jbe/bsw@0
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140 end
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jbe/bsw@0
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141 end
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jbe/bsw@0
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142 output_converters.timestamp = timestamp_loader_func
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jbe/bsw@0
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143 output_converters.timestamptz = timestamp_loader_func
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jbe/bsw@0
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144
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jbe@548
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145 local function time_loader_func(str)
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jbe@1
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146 local hour, minute, second = string.match(
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jbe/bsw@0
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147 str,
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jbe@1
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148 "^([0-9]?[0-9]):([0-9][0-9]):([0-9][0-9])"
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jbe/bsw@0
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149 )
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jbe@1
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150 if hour then
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jbe/bsw@0
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151 return atom.time{
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jbe/bsw@0
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152 hour = tonumber(hour),
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jbe/bsw@0
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153 minute = tonumber(minute),
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jbe/bsw@0
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154 second = tonumber(second)
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jbe/bsw@0
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155 }
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jbe/bsw@0
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156 else
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jbe/bsw@0
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157 return atom.time.invalid
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jbe/bsw@0
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158 end
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jbe/bsw@0
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159 end
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jbe/bsw@0
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160 output_converters.time = time_loader_func
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jbe/bsw@0
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161 output_converters.timetz = time_loader_func
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jbe/bsw@0
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162
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jbe@548
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163 local function json_loader_func(str)
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jbe@178
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164 return assert(json.import(str))
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jbe@178
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165 end
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jbe@178
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166 output_converters.json = json_loader_func
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jbe@178
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167 output_converters.jsonb = json_loader_func
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jbe@176
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168
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jbe/bsw@0
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169 mondelefant.postgresql_connection_prototype.type_mappings = {
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jbe/bsw@0
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170 int8 = atom.integer,
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jbe/bsw@0
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171 int4 = atom.integer,
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jbe/bsw@0
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172 int2 = atom.integer,
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jbe/bsw@0
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173 bool = atom.boolean,
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jbe/bsw@0
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174 date = atom.date,
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jbe/bsw@0
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175 timestamp = atom.timestamp,
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jbe/bsw@0
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176 time = atom.time,
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jbe/bsw@0
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177 text = atom.string,
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jbe/bsw@0
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178 varchar = atom.string,
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jbe@176
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179 json = json,
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jbe@176
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180 jsonb = json,
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jbe/bsw@0
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181 }
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jbe/bsw@0
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182
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jbe/bsw@0
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183
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jbe/bsw@0
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184 function mondelefant.postgresql_connection_prototype.input_converter(conn, value, info)
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jbe/bsw@0
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185 if value == nil then
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jbe/bsw@0
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186 return "NULL"
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jbe/bsw@0
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187 else
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jbe/bsw@0
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188 local converter =
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jbe/bsw@0
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189 input_converters[getmetatable(value)] or
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jbe/bsw@0
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190 input_converters[type(value)]
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jbe/bsw@0
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191 if converter then
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jbe/bsw@0
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192 return converter(conn, value)
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jbe/bsw@0
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193 else
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jbe/bsw@0
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194 return conn:quote_string(tostring(value))
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jbe/bsw@0
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195 end
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jbe/bsw@0
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196 end
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jbe/bsw@0
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197 end
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jbe/bsw@0
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198
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jbe/bsw@0
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199 function mondelefant.postgresql_connection_prototype.output_converter(conn, value, info)
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jbe/bsw@0
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200 if value == nil then
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jbe/bsw@0
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201 return nil
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jbe/bsw@0
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202 else
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jbe@548
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203 local array_type = string.match(info.type, "^(.*)_array$")
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jbe@548
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204 if array_type then
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jbe@548
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205 local result = {}
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jbe@548
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206 local count = 0
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jbe@548
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207 local inner_converter = output_converters[array_type]
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jbe@548
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208 if not inner_converter then
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jbe@548
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209 inner_converter = function(x) return x end
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jbe@548
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210 end
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jbe@548
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211 value = string.match(value, "^{(.*)}$")
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jbe@548
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212 if not value then
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jbe@548
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213 error("Could not parse database array")
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jbe@548
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214 end
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jbe@548
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215 local pos = 1
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jbe@548
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216 while pos <= #value do
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jbe@548
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217 count = count + 1
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jbe@548
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218 if string.find(value, '^""$', pos) then
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jbe@548
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219 result[count] = inner_converter("")
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jbe@548
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220 pos = pos + 2
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jbe@548
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221 elseif string.find(value, '^"",', pos) then
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jbe@548
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222 result[count] = inner_converter("")
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jbe@548
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223 pos = pos + 3
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jbe@548
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224 elseif string.find(value, '^"', pos) then
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jbe@548
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225 local p1, p2, entry = string.find(value, '^"(.-[^\\])",', pos)
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jbe@548
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226 if not p1 then
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jbe@548
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227 p1, p2, entry = string.find(value, '^"(.*[^\\])"$', pos)
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jbe@548
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228 end
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jbe@548
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229 if not entry then error("Could not parse database array") end
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jbe@548
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230 entry = string.gsub(entry, "\\(.)", "%1")
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jbe@548
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231 result[count] = inner_converter(entry)
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jbe@548
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232 pos = p2 + 1
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jbe@548
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233 else
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jbe@548
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234 local p1, p2, entry = string.find(value, '^(.-),', pos)
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jbe@548
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235 if not p1 then p1, p2, entry = string.find(value, '^(.*)$', pos) end
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jbe@548
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236 result[count] = inner_converter(entry)
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jbe@548
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237 pos = p2 + 1
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jbe@548
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238 end
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jbe@548
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239 end
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jbe@548
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240 return result
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jbe/bsw@0
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241 else
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jbe@548
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242 local converter = output_converters[info.type]
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jbe@548
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243 if converter then
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jbe@548
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244 return converter(value)
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jbe@548
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245 else
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jbe@548
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246 return value
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jbe@548
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247 end
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jbe/bsw@0
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248 end
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jbe/bsw@0
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249 end
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jbe/bsw@0
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250 end
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jbe/bsw@0
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251
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jbe@374
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252
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jbe@374
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253 function mondelefant.save_mutability_state(value)
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jbe@374
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254 local jsontype = json.type(value)
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jbe@374
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255 if jsontype == "object" or jsontype == "array" then
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jbe@374
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256 return tostring(value)
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jbe@374
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257 end
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jbe@374
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258 end
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jbe@374
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259
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jbe@374
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260 function mondelefant.verify_mutability_state(value, state)
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jbe@375
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261 return tostring(value) ~= state
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jbe@374
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262 end
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jbe@374
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263
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jbe@375
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264
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jbe@64
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265 return _M
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jbe@64
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266
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jbe/bsw@0
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267
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jbe/bsw@0
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268 --[[
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jbe/bsw@0
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269
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jbe/bsw@0
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270 db = assert(mondelefant.connect{engine='postgresql', dbname='test'})
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jbe/bsw@0
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271 result = db:query{'SELECT ? + 1', atom.date{ year=1999, month=12, day=31}}
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jbe/bsw@0
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272 print(result[1][1].year)
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jbe/bsw@0
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273
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jbe/bsw@0
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274 --]]
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