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util/sqlite3.lua @ 13262:9a86e7cbdd79
mod_storage_internal: Fix fast trimming of archive with exactly one item
This method would previously never delete the first (and only) item
since it works out which item should become the first item after the
trim operation, which doesn't make sense when all should be removed.
This also works as an optimization for when all the last item should be
trimmed, thus items should be removed.
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 24 Sep 2023 13:41:54 +0200 |
parent | 13239:f2578a69ccf4 |
rev | line source |
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1 |
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2 local setmetatable, getmetatable = setmetatable, getmetatable; |
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3 local ipairs, select = ipairs, select; |
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4 local tostring = tostring; |
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5 local assert, xpcall, debug_traceback = assert, xpcall, debug.traceback; |
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6 local error = error |
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7 local type = type |
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8 local t_concat = table.concat; |
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9 local array = require "prosody.util.array"; |
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10 local log = require "prosody.util.logger".init("sql"); |
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11 |
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12 local lsqlite3 = require "lsqlite3"; |
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13 local build_url = require "socket.url".build; |
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14 |
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15 -- from sqlite3.h, no copyright claimed |
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16 local sqlite_errors = require"prosody.util.error".init("util.sqlite3", { |
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17 -- FIXME xmpp error conditions? |
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18 [1] = { code = 1; type = "modify"; condition = "ERROR"; text = "Generic error" }; |
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19 [2] = { code = 2; type = "cancel"; condition = "INTERNAL"; text = "Internal logic error in SQLite" }; |
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20 [3] = { code = 3; type = "auth"; condition = "PERM"; text = "Access permission denied" }; |
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21 [4] = { code = 4; type = "cancel"; condition = "ABORT"; text = "Callback routine requested an abort" }; |
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22 [5] = { code = 5; type = "wait"; condition = "BUSY"; text = "The database file is locked" }; |
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23 [6] = { code = 6; type = "wait"; condition = "LOCKED"; text = "A table in the database is locked" }; |
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24 [7] = { code = 7; type = "wait"; condition = "NOMEM"; text = "A malloc() failed" }; |
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25 [8] = { code = 8; type = "cancel"; condition = "READONLY"; text = "Attempt to write a readonly database" }; |
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26 [9] = { code = 9; type = "cancel"; condition = "INTERRUPT"; text = "Operation terminated by sqlite3_interrupt()" }; |
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27 [10] = { code = 10; type = "wait"; condition = "IOERR"; text = "Some kind of disk I/O error occurred" }; |
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28 [11] = { code = 11; type = "cancel"; condition = "CORRUPT"; text = "The database disk image is malformed" }; |
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29 [12] = { code = 12; type = "modify"; condition = "NOTFOUND"; text = "Unknown opcode in sqlite3_file_control()" }; |
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30 [13] = { code = 13; type = "wait"; condition = "FULL"; text = "Insertion failed because database is full" }; |
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31 [14] = { code = 14; type = "auth"; condition = "CANTOPEN"; text = "Unable to open the database file" }; |
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32 [15] = { code = 15; type = "cancel"; condition = "PROTOCOL"; text = "Database lock protocol error" }; |
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33 [16] = { code = 16; type = "continue"; condition = "EMPTY"; text = "Internal use only" }; |
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34 [17] = { code = 17; type = "modify"; condition = "SCHEMA"; text = "The database schema changed" }; |
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35 [18] = { code = 18; type = "modify"; condition = "TOOBIG"; text = "String or BLOB exceeds size limit" }; |
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36 [19] = { code = 19; type = "modify"; condition = "CONSTRAINT"; text = "Abort due to constraint violation" }; |
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37 [20] = { code = 20; type = "modify"; condition = "MISMATCH"; text = "Data type mismatch" }; |
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38 [21] = { code = 21; type = "modify"; condition = "MISUSE"; text = "Library used incorrectly" }; |
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39 [22] = { code = 22; type = "cancel"; condition = "NOLFS"; text = "Uses OS features not supported on host" }; |
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40 [23] = { code = 23; type = "auth"; condition = "AUTH"; text = "Authorization denied" }; |
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41 [24] = { code = 24; type = "modify"; condition = "FORMAT"; text = "Not used" }; |
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42 [25] = { code = 25; type = "modify"; condition = "RANGE"; text = "2nd parameter to sqlite3_bind out of range" }; |
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43 [26] = { code = 26; type = "cancel"; condition = "NOTADB"; text = "File opened that is not a database file" }; |
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44 [27] = { code = 27; type = "continue"; condition = "NOTICE"; text = "Notifications from sqlite3_log()" }; |
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45 [28] = { code = 28; type = "continue"; condition = "WARNING"; text = "Warnings from sqlite3_log()" }; |
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46 [100] = { code = 100; type = "continue"; condition = "ROW"; text = "sqlite3_step() has another row ready" }; |
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47 [101] = { code = 101; type = "continue"; condition = "DONE"; text = "sqlite3_step() has finished executing" }; |
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48 }); |
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49 |
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50 -- luacheck: ignore 411/assert |
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51 local assert = function(cond, errno, err) |
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52 return assert(sqlite_errors.coerce(cond, err or errno)); |
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53 end |
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54 local _ENV = nil; |
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55 -- luacheck: std none |
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56 |
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57 local column_mt = {}; |
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58 local table_mt = {}; |
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59 local query_mt = {}; |
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60 --local op_mt = {}; |
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61 local index_mt = {}; |
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62 |
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63 local function is_column(x) return getmetatable(x)==column_mt; end |
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64 local function is_index(x) return getmetatable(x)==index_mt; end |
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65 local function is_table(x) return getmetatable(x)==table_mt; end |
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66 local function is_query(x) return getmetatable(x)==query_mt; end |
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67 |
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68 local function Column(definition) |
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69 return setmetatable(definition, column_mt); |
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70 end |
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71 local function Table(definition) |
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72 local c = {} |
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73 for i,col in ipairs(definition) do |
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74 if is_column(col) then |
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75 c[i], c[col.name] = col, col; |
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76 elseif is_index(col) then |
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77 col.table = definition.name; |
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78 end |
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79 end |
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80 return setmetatable({ __table__ = definition, c = c, name = definition.name }, table_mt); |
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81 end |
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82 local function Index(definition) |
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83 return setmetatable(definition, index_mt); |
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84 end |
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85 |
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86 function table_mt:__tostring() |
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87 local s = { 'name="'..self.__table__.name..'"' } |
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88 for _, col in ipairs(self.__table__) do |
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89 s[#s+1] = tostring(col); |
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90 end |
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91 return 'Table{ '..t_concat(s, ", ")..' }' |
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92 end |
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93 table_mt.__index = {}; |
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94 function table_mt.__index:create(engine) |
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95 return engine:_create_table(self); |
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96 end |
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97 function column_mt:__tostring() |
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98 return 'Column{ name="'..self.name..'", type="'..self.type..'" }' |
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99 end |
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100 function index_mt:__tostring() |
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101 local s = 'Index{ name="'..self.name..'"'; |
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102 for i=1,#self do s = s..', "'..self[i]:gsub("[\\\"]", "\\%1")..'"'; end |
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103 return s..' }'; |
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104 -- return 'Index{ name="'..self.name..'", type="'..self.type..'" }' |
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105 end |
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106 |
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107 local engine = {}; |
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108 function engine:connect() |
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109 if self.conn then return true; end |
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110 |
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111 local params = self.params; |
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112 assert(params.driver == "SQLite3", "Only sqlite3 is supported"); |
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113 local dbh, err = sqlite_errors.coerce(lsqlite3.open(params.database)); |
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114 if not dbh then return nil, err; end |
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115 self.conn = dbh; |
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116 self.prepared = {}; |
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117 local ok, err = self:set_encoding(); |
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118 if not ok then |
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119 return ok, err; |
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120 end |
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121 local ok, err = self:onconnect(); |
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122 if ok == false then |
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123 return ok, err; |
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124 end |
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125 return true; |
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126 end |
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127 function engine:onconnect() -- luacheck: ignore 212/self |
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128 -- Override from create_engine() |
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129 end |
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130 function engine:ondisconnect() -- luacheck: ignore 212/self |
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131 -- Override from create_engine() |
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132 end |
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133 |
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134 function engine:execute(sql, ...) |
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135 local success, err = self:connect(); |
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136 if not success then return success, err; end |
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137 |
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138 if select('#', ...) == 0 then |
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139 local ret = self.conn:exec(sql); |
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140 if ret ~= lsqlite3.OK then |
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141 local err = sqlite_errors.new(err); |
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142 err.text = self.conn:errmsg(); |
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143 return err; |
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144 end |
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145 return true; |
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146 end |
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147 |
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148 local stmt, err = self.conn:prepare(sql); |
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149 if not stmt then |
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150 err = sqlite_errors.new(err); |
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151 err.text = self.conn:errmsg(); |
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152 return stmt, err; |
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153 end |
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154 |
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155 local ret = stmt:bind_values(...); |
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156 if ret ~= lsqlite3.OK then |
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157 return nil, sqlite_errors.new(ret, { message = self.conn:errmsg() }); |
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158 end |
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159 return stmt; |
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160 end |
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161 |
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162 local function iterator(table) |
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164 return function() |
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166 local item = table[i]; | |
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167 if item ~= nil then |
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168 return item; |
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169 end |
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170 end |
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171 end |
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172 |
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173 local result_mt = { |
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174 __len = function(self) |
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175 return self.__rowcount; |
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176 end; |
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177 __index = { |
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178 affected = function(self) |
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179 return self.__affected; |
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180 end; |
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181 rowcount = function(self) |
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182 return self.__rowcount; |
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183 end; |
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184 }; |
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185 __call = function(self) |
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186 return iterator(self.__data); |
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187 end; |
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188 }; |
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189 |
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190 local function debugquery(where, sql, ...) |
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191 local i = 0; local a = {...} |
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192 sql = sql:gsub("\n?\t+", " "); |
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193 log("debug", "[%s] %s", where, (sql:gsub("%?", function () |
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194 i = i + 1; |
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195 local v = a[i]; |
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196 if type(v) == "string" then |
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197 v = ("'%s'"):format(v:gsub("'", "''")); |
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198 end |
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199 return tostring(v); |
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200 end))); |
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201 end |
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202 |
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203 function engine:execute_update(sql, ...) |
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204 local prepared = self.prepared; |
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205 local stmt = prepared[sql]; |
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206 if stmt and stmt:isopen() then |
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207 prepared[sql] = nil; -- Can't be used concurrently |
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208 else |
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209 stmt = assert(self.conn:prepare(sql)); |
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210 end |
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211 local ret = stmt:bind_values(...); |
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212 if ret ~= lsqlite3.OK then error(self.conn:errmsg()); end |
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213 local data = array(); |
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214 for row in stmt:rows() do |
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215 data:push(array(row)); |
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216 end |
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217 -- FIXME Error handling, BUSY, ERROR, MISUSE |
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218 if stmt:reset() == lsqlite3.OK then |
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219 prepared[sql] = stmt; |
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220 end |
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221 local affected = self.conn:changes(); |
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222 return setmetatable({ __affected = affected; __rowcount = #data; __data = data }, result_mt); |
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223 end |
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224 |
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225 function engine:execute_query(sql, ...) |
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226 return self:execute_update(sql, ...)() |
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227 end |
13145 | 228 |
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229 engine.insert = engine.execute_update; |
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230 engine.select = engine.execute_query; |
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231 engine.delete = engine.execute_update; |
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232 engine.update = engine.execute_update; |
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233 local function debugwrap(name, f) |
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234 return function (self, sql, ...) |
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235 debugquery(name, sql, ...) |
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236 return f(self, sql, ...) |
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237 end |
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238 end |
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239 function engine:debug(enable) |
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240 self._debug = enable; |
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241 if enable then |
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242 engine.insert = debugwrap("insert", engine.execute_update); |
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243 engine.select = debugwrap("select", engine.execute_query); |
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244 engine.delete = debugwrap("delete", engine.execute_update); |
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245 engine.update = debugwrap("update", engine.execute_update); |
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246 else |
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247 engine.insert = engine.execute_update; |
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248 engine.select = engine.execute_query; |
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249 engine.delete = engine.execute_update; |
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250 engine.update = engine.execute_update; |
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251 end |
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252 end |
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253 function engine:_(word) |
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254 local ret = self.conn:exec(word); |
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255 if ret ~= lsqlite3.OK then return nil, self.conn:errmsg(); end |
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256 return true; |
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257 end |
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258 function engine:_transaction(func, ...) |
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259 if not self.conn then |
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260 local a,b = self:connect(); |
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261 if not a then return a,b; end |
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262 end |
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263 --assert(not self.__transaction, "Recursive transactions not allowed"); |
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264 local ok, err = self:_"BEGIN"; |
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265 if not ok then return ok, err; end |
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266 self.__transaction = true; |
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267 local success, a, b, c = xpcall(func, debug_traceback, ...); |
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268 self.__transaction = nil; |
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269 if success then |
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270 log("debug", "SQL transaction success [%s]", tostring(func)); |
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271 local ok, err = self:_"COMMIT"; |
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272 if not ok then return ok, err; end -- commit failed |
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273 return success, a, b, c; |
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274 else |
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275 log("debug", "SQL transaction failure [%s]: %s", tostring(func), a); |
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276 if self.conn then self:_"ROLLBACK"; end |
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277 return success, a; |
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278 end |
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279 end |
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280 function engine:transaction(...) |
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281 local ok, ret = self:_transaction(...); |
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282 if not ok then |
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283 local conn = self.conn; |
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284 if not conn or not conn:isopen() then |
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285 self.conn = nil; |
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286 self:ondisconnect(); |
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287 ok, ret = self:_transaction(...); |
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288 end |
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289 end |
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290 return ok, ret; |
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291 end |
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292 function engine:_create_index(index) |
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293 local sql = "CREATE INDEX IF NOT EXISTS \""..index.name.."\" ON \""..index.table.."\" ("; |
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294 for i=1,#index do |
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295 sql = sql.."\""..index[i].."\""; |
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296 if i ~= #index then sql = sql..", "; end |
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297 end |
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298 sql = sql..");" |
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299 if index.unique then |
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300 sql = sql:gsub("^CREATE", "CREATE UNIQUE"); |
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301 end |
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302 if self._debug then |
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303 debugquery("create", sql); |
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304 end |
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305 return self:execute(sql); |
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306 end |
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307 function engine:_create_table(table) |
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308 local sql = "CREATE TABLE IF NOT EXISTS \""..table.name.."\" ("; |
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309 for i,col in ipairs(table.c) do |
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310 local col_type = col.type; |
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311 sql = sql.."\""..col.name.."\" "..col_type; |
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312 if col.nullable == false then sql = sql.." NOT NULL"; end |
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313 if col.primary_key == true then sql = sql.." PRIMARY KEY"; end |
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314 if col.auto_increment == true then |
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315 sql = sql.." AUTOINCREMENT"; |
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316 end |
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317 if i ~= #table.c then sql = sql..", "; end |
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318 end |
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319 sql = sql.. ");" |
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320 if self._debug then |
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321 debugquery("create", sql); |
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322 end |
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323 local success,err = self:execute(sql); |
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|
324 if not success then return success,err; end |
13239
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util.sqlite3: Clean up unused variables
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|
325 for _, v in ipairs(table.__table__) do |
12845
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326 if is_index(v) then |
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327 self:_create_index(v); |
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328 end |
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329 end |
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330 return success; |
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331 end |
13145 | 332 |
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333 function engine:set_encoding() -- to UTF-8 |
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334 return self:transaction(function() |
13145 | 335 for encoding in self:select "PRAGMA encoding;" do |
336 if encoding[1] == "UTF-8" then | |
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337 self.charset = "utf8"; |
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338 end |
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339 end |
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340 end); |
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341 end |
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342 local engine_mt = { __index = engine }; |
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343 |
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344 local function db2uri(params) |
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345 return build_url{ |
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346 scheme = params.driver, |
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347 user = params.username, |
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348 password = params.password, |
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349 host = params.host, |
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350 port = params.port, |
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351 path = params.database, |
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352 }; |
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353 end |
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354 |
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355 local function create_engine(_, params, onconnect, ondisconnect) |
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356 assert(params.driver == "SQLite3", "Only SQLite3 is supported without LuaDBI"); |
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357 return setmetatable({ url = db2uri(params); params = params; onconnect = onconnect; ondisconnect = ondisconnect }, engine_mt); |
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358 end |
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359 |
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360 return { |
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361 is_column = is_column; |
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362 is_index = is_index; |
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363 is_table = is_table; |
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364 is_query = is_query; |
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365 Column = Column; |
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366 Table = Table; |
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367 Index = Index; |
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368 create_engine = create_engine; |
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369 db2uri = db2uri; |
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370 }; |