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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/bsw@0
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96
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jbe/bsw@0
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97 output_converters = setmetatable({}, { __mode = "k" })
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jbe/bsw@0
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98
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jbe/bsw@0
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99 output_converters.int8 = function(str) return atom.integer:load(str) end
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jbe/bsw@0
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100 output_converters.int4 = function(str) return atom.integer:load(str) end
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jbe/bsw@0
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101 output_converters.int2 = function(str) return atom.integer:load(str) end
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jbe/bsw@0
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102
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jbe/bsw@0
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103 output_converters.numeric = function(str) return atom.number:load(str) end
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jbe/bsw@0
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104 output_converters.float4 = function(str) return atom.number:load(str) end
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jbe/bsw@0
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105 output_converters.float8 = function(str) return atom.number:load(str) end
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jbe/bsw@0
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106
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jbe/bsw@0
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107 output_converters.bool = function(str) return atom.boolean:load(str) end
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jbe/bsw@0
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108
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jbe/bsw@0
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109 output_converters.date = function(str) return atom.date:load(str) end
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jbe/bsw@0
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110
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jbe/bsw@0
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111 local timestamp_loader_func = function(str)
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jbe@1
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112 local year, month, day, hour, minute, second = string.match(
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jbe/bsw@0
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113 str,
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jbe@1
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114 "^([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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115 )
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jbe@1
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116 if year then
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jbe/bsw@0
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117 return atom.timestamp{
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jbe@1
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118 year = tonumber(year),
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jbe@1
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119 month = tonumber(month),
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jbe@1
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120 day = tonumber(day),
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jbe/bsw@0
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121 hour = tonumber(hour),
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jbe/bsw@0
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122 minute = tonumber(minute),
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jbe/bsw@0
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123 second = tonumber(second)
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jbe/bsw@0
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124 }
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jbe/bsw@0
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125 else
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jbe/bsw@0
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126 return atom.timestamp.invalid
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jbe/bsw@0
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127 end
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jbe/bsw@0
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128 end
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jbe/bsw@0
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129 output_converters.timestamp = timestamp_loader_func
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jbe/bsw@0
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130 output_converters.timestamptz = timestamp_loader_func
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jbe/bsw@0
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131
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jbe/bsw@0
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132 local time_loader_func = function(str)
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jbe@1
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133 local hour, minute, second = string.match(
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jbe/bsw@0
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134 str,
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jbe@1
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135 "^([0-9]?[0-9]):([0-9][0-9]):([0-9][0-9])"
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jbe/bsw@0
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136 )
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jbe@1
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137 if hour then
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jbe/bsw@0
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138 return atom.time{
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jbe/bsw@0
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139 hour = tonumber(hour),
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jbe/bsw@0
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140 minute = tonumber(minute),
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jbe/bsw@0
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141 second = tonumber(second)
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jbe/bsw@0
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142 }
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jbe/bsw@0
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143 else
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jbe/bsw@0
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144 return atom.time.invalid
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jbe/bsw@0
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145 end
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jbe/bsw@0
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146 end
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jbe/bsw@0
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147 output_converters.time = time_loader_func
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jbe/bsw@0
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148 output_converters.timetz = time_loader_func
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jbe/bsw@0
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149
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jbe@178
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150 local json_loader_func = function(str)
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jbe@178
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151 return assert(json.import(str))
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jbe@178
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152 end
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jbe@178
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153 output_converters.json = json_loader_func
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jbe@178
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154 output_converters.jsonb = json_loader_func
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jbe@176
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155
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jbe/bsw@0
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156 mondelefant.postgresql_connection_prototype.type_mappings = {
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jbe/bsw@0
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157 int8 = atom.integer,
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jbe/bsw@0
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158 int4 = atom.integer,
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jbe/bsw@0
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159 int2 = atom.integer,
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jbe/bsw@0
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160 bool = atom.boolean,
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jbe/bsw@0
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161 date = atom.date,
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jbe/bsw@0
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162 timestamp = atom.timestamp,
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jbe/bsw@0
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163 time = atom.time,
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jbe/bsw@0
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164 text = atom.string,
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jbe/bsw@0
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165 varchar = atom.string,
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jbe@176
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166 json = json,
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jbe@176
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167 jsonb = json,
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jbe/bsw@0
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168 }
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jbe/bsw@0
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169
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jbe/bsw@0
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170
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jbe/bsw@0
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171 function mondelefant.postgresql_connection_prototype.input_converter(conn, value, info)
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jbe/bsw@0
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172 if value == nil then
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jbe/bsw@0
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173 return "NULL"
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jbe/bsw@0
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174 else
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jbe/bsw@0
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175 local converter =
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jbe/bsw@0
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176 input_converters[getmetatable(value)] or
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jbe/bsw@0
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177 input_converters[type(value)]
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jbe/bsw@0
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178 if converter then
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jbe/bsw@0
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179 return converter(conn, value)
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jbe/bsw@0
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180 else
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jbe/bsw@0
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181 return conn:quote_string(tostring(value))
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jbe/bsw@0
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182 end
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jbe/bsw@0
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183 end
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jbe/bsw@0
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184 end
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jbe/bsw@0
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185
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jbe/bsw@0
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186 function mondelefant.postgresql_connection_prototype.output_converter(conn, value, info)
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jbe/bsw@0
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187 if value == nil then
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jbe/bsw@0
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188 return nil
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jbe/bsw@0
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189 else
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jbe/bsw@0
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190 local converter = output_converters[info.type]
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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(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 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@374
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199
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jbe@374
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200 function mondelefant.save_mutability_state(value)
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jbe@374
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201 local jsontype = json.type(value)
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jbe@374
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202 if jsontype == "object" or jsontype == "array" then
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jbe@374
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203 return tostring(value)
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jbe@374
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204 end
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jbe@374
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205 end
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jbe@374
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206
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jbe@374
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207 function mondelefant.verify_mutability_state(value, state)
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jbe@375
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208 return tostring(value) ~= state
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jbe@374
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209 end
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jbe@374
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210
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jbe@375
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211
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jbe@64
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212 return _M
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jbe@64
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213
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jbe/bsw@0
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214
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jbe/bsw@0
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215 --[[
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jbe/bsw@0
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216
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jbe/bsw@0
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217 db = assert(mondelefant.connect{engine='postgresql', dbname='test'})
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jbe/bsw@0
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218 result = db:query{'SELECT ? + 1', atom.date{ year=1999, month=12, day=31}}
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jbe/bsw@0
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219 print(result[1][1].year)
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jbe/bsw@0
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220
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jbe/bsw@0
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221 --]]
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