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7889515bac86
util/sql.lua

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util/sql.lua @ 6730:7889515bac86

util.sql: Remove unused functions and unused commented code
author Matthew Wild <mwild1@gmail.com>
date Sat, 30 May 2015 22:23:19 +0100
parent 6532:a966efeb6cb3
child 6733:36e2b35397b1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
5494
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1
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2 local setmetatable, getmetatable = setmetatable, getmetatable;
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3 local ipairs, unpack, select = ipairs, unpack, select;
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4 local tonumber, tostring = tonumber, tostring;
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5 local assert, xpcall, debug_traceback = assert, xpcall, debug.traceback;
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6 local t_concat = table.concat;
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7 local s_char = string.char;
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8 local log = require "util.logger".init("sql");
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10 local DBI = require "DBI";
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11 -- This loads all available drivers while globals are unlocked
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12 -- LuaDBI should be fixed to not set globals.
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13 DBI.Drivers();
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14 local build_url = require "socket.url".build;
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16 module("sql")
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18 local column_mt = {};
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19 local table_mt = {};
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20 local query_mt = {};
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21 --local op_mt = {};
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22 local index_mt = {};
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24 function is_column(x) return getmetatable(x)==column_mt; end
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25 function is_index(x) return getmetatable(x)==index_mt; end
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26 function is_table(x) return getmetatable(x)==table_mt; end
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27 function is_query(x) return getmetatable(x)==query_mt; end
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28 function Integer(n) return "Integer()" end
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29 function String(n) return "String()" end
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31 function Column(definition)
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32 return setmetatable(definition, column_mt);
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33 end
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34 function Table(definition)
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35 local c = {}
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36 for i,col in ipairs(definition) do
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37 if is_column(col) then
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38 c[i], c[col.name] = col, col;
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39 elseif is_index(col) then
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40 col.table = definition.name;
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41 end
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42 end
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43 return setmetatable({ __table__ = definition, c = c, name = definition.name }, table_mt);
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44 end
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45 function Index(definition)
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46 return setmetatable(definition, index_mt);
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47 end
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48
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49 function table_mt:__tostring()
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50 local s = { 'name="'..self.__table__.name..'"' }
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51 for i,col in ipairs(self.__table__) do
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52 s[#s+1] = tostring(col);
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53 end
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54 return 'Table{ '..t_concat(s, ", ")..' }'
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55 end
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56 table_mt.__index = {};
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57 function table_mt.__index:create(engine)
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58 return engine:_create_table(self);
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59 end
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60 function table_mt:__call(...)
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61 -- TODO
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62 end
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63 function column_mt:__tostring()
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64 return 'Column{ name="'..self.name..'", type="'..self.type..'" }'
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65 end
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66 function index_mt:__tostring()
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67 local s = 'Index{ name="'..self.name..'"';
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68 for i=1,#self do s = s..', "'..self[i]:gsub("[\\\"]", "\\%1")..'"'; end
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69 return s..' }';
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70 -- return 'Index{ name="'..self.name..'", type="'..self.type..'" }'
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71 end
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72
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73 local function urldecode(s) return s and (s:gsub("%%(%x%x)", function (c) return s_char(tonumber(c,16)); end)); end
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74 local function parse_url(url)
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75 local scheme, secondpart, database = url:match("^([%w%+]+)://([^/]*)/?(.*)");
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76 assert(scheme, "Invalid URL format");
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77 local username, password, host, port;
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78 local authpart, hostpart = secondpart:match("([^@]+)@([^@+])");
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79 if not authpart then hostpart = secondpart; end
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80 if authpart then
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81 username, password = authpart:match("([^:]*):(.*)");
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82 username = username or authpart;
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83 password = password and urldecode(password);
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84 end
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85 if hostpart then
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86 host, port = hostpart:match("([^:]*):(.*)");
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87 host = host or hostpart;
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88 port = port and assert(tonumber(port), "Invalid URL format");
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89 end
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90 return {
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91 scheme = scheme:lower();
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92 username = username; password = password;
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93 host = host; port = port;
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94 database = #database > 0 and database or nil;
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95 };
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96 end
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97
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98 local engine = {};
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99 function engine:connect()
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100 if self.conn then return true; end
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101
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102 local params = self.params;
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103 assert(params.driver, "no driver")
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104 local dbh, err = DBI.Connect(
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105 params.driver, params.database,
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106 params.username, params.password,
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107 params.host, params.port
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108 );
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109 if not dbh then return nil, err; end
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110 dbh:autocommit(false); -- don't commit automatically
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111 self.conn = dbh;
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112 self.prepared = {};
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113 self:set_encoding();
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114 return true;
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115 end
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116 function engine:execute(sql, ...)
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117 local success, err = self:connect();
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118 if not success then return success, err; end
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119 local prepared = self.prepared;
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120
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121 local stmt = prepared[sql];
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122 if not stmt then
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123 local err;
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124 stmt, err = self.conn:prepare(sql);
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125 if not stmt then return stmt, err; end
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126 prepared[sql] = stmt;
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127 end
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128
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129 local success, err = stmt:execute(...);
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130 if not success then return success, err; end
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131 return stmt;
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132 end
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133
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134 local result_mt = { __index = {
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135 affected = function(self) return self.__stmt:affected(); end;
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136 rowcount = function(self) return self.__stmt:rowcount(); end;
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137 } };
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138
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139 function engine:execute_query(sql, ...)
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140 if self.params.driver == "PostgreSQL" then
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141 sql = sql:gsub("`", "\"");
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142 end
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143 local stmt = assert(self.conn:prepare(sql));
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144 assert(stmt:execute(...));
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145 return stmt:rows();
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146 end
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147 function engine:execute_update(sql, ...)
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148 if self.params.driver == "PostgreSQL" then
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149 sql = sql:gsub("`", "\"");
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150 end
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151 local prepared = self.prepared;
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152 local stmt = prepared[sql];
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153 if not stmt then
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154 stmt = assert(self.conn:prepare(sql));
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155 prepared[sql] = stmt;
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156 end
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157 assert(stmt:execute(...));
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158 return setmetatable({ __stmt = stmt }, result_mt);
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159 end
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160 engine.insert = engine.execute_update;
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161 engine.select = engine.execute_query;
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162 engine.delete = engine.execute_update;
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163 engine.update = engine.execute_update;
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164 function engine:_transaction(func, ...)
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165 if not self.conn then
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166 local a,b = self:connect();
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167 if not a then return a,b; end
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168 end
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169 --assert(not self.__transaction, "Recursive transactions not allowed");
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170 local args, n_args = {...}, select("#", ...);
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171 local function f() return func(unpack(args, 1, n_args)); end
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172 self.__transaction = true;
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173 local success, a, b, c = xpcall(f, debug_traceback);
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174 self.__transaction = nil;
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175 if success then
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176 log("debug", "SQL transaction success [%s]", tostring(func));
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177 local ok, err = self.conn:commit();
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178 if not ok then return ok, err; end -- commit failed
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179 return success, a, b, c;
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180 else
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181 log("debug", "SQL transaction failure [%s]: %s", tostring(func), a);
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182 if self.conn then self.conn:rollback(); end
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183 return success, a;
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184 end
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185 end
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186 function engine:transaction(...)
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187 local a,b = self:_transaction(...);
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188 if not a then
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189 local conn = self.conn;
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190 if not conn or not conn:ping() then
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191 self.conn = nil;
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192 a,b = self:_transaction(...);
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193 end
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194 end
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195 return a,b;
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196 end
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197 function engine:_create_index(index)
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198 local sql = "CREATE INDEX `"..index.name.."` ON `"..index.table.."` (";
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199 for i=1,#index do
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200 sql = sql.."`"..index[i].."`";
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parents:
diff changeset
201 if i ~= #index then sql = sql..", "; end
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
202 end
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
203 sql = sql..");"
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
204 if self.params.driver == "PostgreSQL" then
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
205 sql = sql:gsub("`", "\"");
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
206 elseif self.params.driver == "MySQL" then
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
207 sql = sql:gsub("`([,)])", "`(20)%1");
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
208 end
5885
cbc25ae1eea0 util.sql: Allow creating unique indices
Kim Alvefur <zash@zash.se>
parents: 5883
diff changeset
209 if index.unique then
cbc25ae1eea0 util.sql: Allow creating unique indices
Kim Alvefur <zash@zash.se>
parents: 5883
diff changeset
210 sql = sql:gsub("^CREATE", "CREATE UNIQUE");
cbc25ae1eea0 util.sql: Allow creating unique indices
Kim Alvefur <zash@zash.se>
parents: 5883
diff changeset
211 end
5494
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
212 --print(sql);
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
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parents:
diff changeset
213 return self:execute(sql);
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
214 end
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
215 function engine:_create_table(table)
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
216 local sql = "CREATE TABLE `"..table.name.."` (";
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
217 for i,col in ipairs(table.c) do
5890
544ca3d94596 util.sql: Rewrite MEDIUMTEXT to TEXT for drivers other than MySQL
Kim Alvefur <zash@zash.se>
parents: 5889
diff changeset
218 local col_type = col.type;
544ca3d94596 util.sql: Rewrite MEDIUMTEXT to TEXT for drivers other than MySQL
Kim Alvefur <zash@zash.se>
parents: 5889
diff changeset
219 if col_type == "MEDIUMTEXT" and self.params.driver ~= "MySQL" then
544ca3d94596 util.sql: Rewrite MEDIUMTEXT to TEXT for drivers other than MySQL
Kim Alvefur <zash@zash.se>
parents: 5889
diff changeset
220 col_type = "TEXT"; -- MEDIUMTEXT is MySQL-specific
544ca3d94596 util.sql: Rewrite MEDIUMTEXT to TEXT for drivers other than MySQL
Kim Alvefur <zash@zash.se>
parents: 5889
diff changeset
221 end
5912
f6145e894569 util.sql: Rewrite auto increment columns to SERIAL for PostgreSQL
Kim Alvefur <zash@zash.se>
parents: 5910
diff changeset
222 if col.auto_increment == true and self.params.driver == "PostgreSQL" then
f6145e894569 util.sql: Rewrite auto increment columns to SERIAL for PostgreSQL
Kim Alvefur <zash@zash.se>
parents: 5910
diff changeset
223 col_type = "BIGSERIAL";
f6145e894569 util.sql: Rewrite auto increment columns to SERIAL for PostgreSQL
Kim Alvefur <zash@zash.se>
parents: 5910
diff changeset
224 end
5890
544ca3d94596 util.sql: Rewrite MEDIUMTEXT to TEXT for drivers other than MySQL
Kim Alvefur <zash@zash.se>
parents: 5889
diff changeset
225 sql = sql.."`"..col.name.."` "..col_type;
5494
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
226 if col.nullable == false then sql = sql.." NOT NULL"; end
5886
1237f9cc3123 util.sql: Allow columns to be marked the primary key
Kim Alvefur <zash@zash.se>
parents: 5885
diff changeset
227 if col.primary_key == true then sql = sql.." PRIMARY KEY"; end
5887
1f860279b2f8 util.sql: Support incrementing columns
Kim Alvefur <zash@zash.se>
parents: 5886
diff changeset
228 if col.auto_increment == true then
5912
f6145e894569 util.sql: Rewrite auto increment columns to SERIAL for PostgreSQL
Kim Alvefur <zash@zash.se>
parents: 5910
diff changeset
229 if self.params.driver == "MySQL" then
5887
1f860279b2f8 util.sql: Support incrementing columns
Kim Alvefur <zash@zash.se>
parents: 5886
diff changeset
230 sql = sql.." AUTO_INCREMENT";
1f860279b2f8 util.sql: Support incrementing columns
Kim Alvefur <zash@zash.se>
parents: 5886
diff changeset
231 elseif self.params.driver == "SQLite3" then
1f860279b2f8 util.sql: Support incrementing columns
Kim Alvefur <zash@zash.se>
parents: 5886
diff changeset
232 sql = sql.." AUTOINCREMENT";
1f860279b2f8 util.sql: Support incrementing columns
Kim Alvefur <zash@zash.se>
parents: 5886
diff changeset
233 end
1f860279b2f8 util.sql: Support incrementing columns
Kim Alvefur <zash@zash.se>
parents: 5886
diff changeset
234 end
5494
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
235 if i ~= #table.c then sql = sql..", "; end
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
236 end
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
237 sql = sql.. ");"
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
238 if self.params.driver == "PostgreSQL" then
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
239 sql = sql:gsub("`", "\"");
5739
2e9ad9cb206f util.sql: Set charset and collation for MySQL when creating tables
Kim Alvefur <zash@zash.se>
parents: 5494
diff changeset
240 elseif self.params.driver == "MySQL" then
2e9ad9cb206f util.sql: Set charset and collation for MySQL when creating tables
Kim Alvefur <zash@zash.se>
parents: 5494
diff changeset
241 sql = sql:gsub(";$", " CHARACTER SET 'utf8' COLLATE 'utf8_bin';");
5494
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
242 end
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
243 local success,err = self:execute(sql);
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
244 if not success then return success,err; end
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
245 for i,v in ipairs(table.__table__) do
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
246 if is_index(v) then
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
247 self:_create_index(v);
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
248 end
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
249 end
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
250 return success;
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
251 end
5883
39b187e7e892 mod_storage_sql2, util.sql: Move code for setting encoding to util.sql
Kim Alvefur <zash@zash.se>
parents: 5776
diff changeset
252 function engine:set_encoding() -- to UTF-8
5888
f3e408ae59a6 util.sql: Find out if MySQL supports utf8mb4 and use that
Kim Alvefur <zash@zash.se>
parents: 5887
diff changeset
253 local driver = self.params.driver;
5889
ea6a3adb6a69 util.sql: Check what encoding SQLite3 uses
Kim Alvefur <zash@zash.se>
parents: 5888
diff changeset
254 if driver == "SQLite3" then
ea6a3adb6a69 util.sql: Check what encoding SQLite3 uses
Kim Alvefur <zash@zash.se>
parents: 5888
diff changeset
255 return self:transaction(function()
ea6a3adb6a69 util.sql: Check what encoding SQLite3 uses
Kim Alvefur <zash@zash.se>
parents: 5888
diff changeset
256 if self:select"PRAGMA encoding;"()[1] == "UTF-8" then
ea6a3adb6a69 util.sql: Check what encoding SQLite3 uses
Kim Alvefur <zash@zash.se>
parents: 5888
diff changeset
257 self.charset = "utf8";
ea6a3adb6a69 util.sql: Check what encoding SQLite3 uses
Kim Alvefur <zash@zash.se>
parents: 5888
diff changeset
258 end
ea6a3adb6a69 util.sql: Check what encoding SQLite3 uses
Kim Alvefur <zash@zash.se>
parents: 5888
diff changeset
259 end);
ea6a3adb6a69 util.sql: Check what encoding SQLite3 uses
Kim Alvefur <zash@zash.se>
parents: 5888
diff changeset
260 end
5888
f3e408ae59a6 util.sql: Find out if MySQL supports utf8mb4 and use that
Kim Alvefur <zash@zash.se>
parents: 5887
diff changeset
261 local set_names_query = "SET NAMES '%s';"
f3e408ae59a6 util.sql: Find out if MySQL supports utf8mb4 and use that
Kim Alvefur <zash@zash.se>
parents: 5887
diff changeset
262 local charset = "utf8";
f3e408ae59a6 util.sql: Find out if MySQL supports utf8mb4 and use that
Kim Alvefur <zash@zash.se>
parents: 5887
diff changeset
263 if driver == "MySQL" then
5883
39b187e7e892 mod_storage_sql2, util.sql: Move code for setting encoding to util.sql
Kim Alvefur <zash@zash.se>
parents: 5776
diff changeset
264 set_names_query = set_names_query:gsub(";$", " COLLATE 'utf8_bin';");
5888
f3e408ae59a6 util.sql: Find out if MySQL supports utf8mb4 and use that
Kim Alvefur <zash@zash.se>
parents: 5887
diff changeset
265 local ok, charsets = self:transaction(function()
5919
d1cc67ed0767 util.sql: Fix previous commit
Kim Alvefur <zash@zash.se>
parents: 5918
diff changeset
266 return self:select"SELECT `CHARACTER_SET_NAME` FROM `information_schema`.`CHARACTER_SETS` WHERE `CHARACTER_SET_NAME` LIKE 'utf8%' ORDER BY MAXLEN DESC LIMIT 1;";
5888
f3e408ae59a6 util.sql: Find out if MySQL supports utf8mb4 and use that
Kim Alvefur <zash@zash.se>
parents: 5887
diff changeset
267 end);
f3e408ae59a6 util.sql: Find out if MySQL supports utf8mb4 and use that
Kim Alvefur <zash@zash.se>
parents: 5887
diff changeset
268 local row = ok and charsets();
f3e408ae59a6 util.sql: Find out if MySQL supports utf8mb4 and use that
Kim Alvefur <zash@zash.se>
parents: 5887
diff changeset
269 charset = row and row[1] or charset;
5883
39b187e7e892 mod_storage_sql2, util.sql: Move code for setting encoding to util.sql
Kim Alvefur <zash@zash.se>
parents: 5776
diff changeset
270 end
5888
f3e408ae59a6 util.sql: Find out if MySQL supports utf8mb4 and use that
Kim Alvefur <zash@zash.se>
parents: 5887
diff changeset
271 self.charset = charset;
5910
a19b3646d5f0 util.sql: Fix to call execute on 'self' rather than 'engine' (thanks eisensheng)
Matthew Wild <mwild1@gmail.com>
parents: 5890
diff changeset
272 return self:transaction(function() return self:execute(set_names_query:format(charset)); end);
5883
39b187e7e892 mod_storage_sql2, util.sql: Move code for setting encoding to util.sql
Kim Alvefur <zash@zash.se>
parents: 5776
diff changeset
273 end
5494
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
274 local engine_mt = { __index = engine };
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
275
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
276 local function db2uri(params)
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
277 return build_url{
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
278 scheme = params.driver,
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
279 user = params.username,
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
280 password = params.password,
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
281 host = params.host,
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
282 port = params.port,
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
283 path = params.database,
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
284 };
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
285 end
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
286 local engine_cache = {}; -- TODO make weak valued
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
287 function create_engine(self, params)
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
288 local url = db2uri(params);
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
289 if not engine_cache[url] then
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
290 local engine = setmetatable({ url = url, params = params }, engine_mt);
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
291 engine_cache[url] = engine;
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
292 end
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
293 return engine_cache[url];
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
294 end
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
295
9916f0a2d178 mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
296 return _M;