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1 #
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2 # Copyright INRA-URGI 2009-2010
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3 #
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4 # This software is governed by the CeCILL license under French law and
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5 # abiding by the rules of distribution of free software. You can use,
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6 # modify and/ or redistribute the software under the terms of the CeCILL
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7 # license as circulated by CEA, CNRS and INRIA at the following URL
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8 # "http://www.cecill.info".
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9 #
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10 # As a counterpart to the access to the source code and rights to copy,
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11 # modify and redistribute granted by the license, users are provided only
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12 # with a limited warranty and the software's author, the holder of the
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13 # economic rights, and the successive licensors have only limited
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14 # liability.
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15 #
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16 # In this respect, the user's attention is drawn to the risks associated
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17 # with loading, using, modifying and/or developing or reproducing the
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18 # software by the user in light of its specific status of free software,
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19 # that may mean that it is complicated to manipulate, and that also
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20 # therefore means that it is reserved for developers and experienced
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21 # professionals having in-depth computer knowledge. Users are therefore
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22 # encouraged to load and test the software's suitability as regards their
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23 # requirements in conditions enabling the security of their systems and/or
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24 # data to be ensured and, more generally, to use and operate it in the
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25 # same conditions as regards security.
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26 #
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27 # The fact that you are presently reading this means that you have had
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28 # knowledge of the CeCILL license and that you accept its terms.
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29 #
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30 import re
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31 import sys
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32
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33 class MySqlTable(object):
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34 """
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35 Store a table of a mySQL database, used for transcripts or exons
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36 Record a a name and a type (int, float, double) for each column
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37 @ivar name: name of the table
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38 @type name: string
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39 @ivar variables: name of the columns
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40 @type variables: list of string
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41 @ivar types: type of the columns
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42 @type types: dict of string
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43 @ivar mySqlConnection: connection to a database
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44 @type mySqlConnection: class L{MySqlConnection<MySqlConnection>}
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45 @ivar nbLines: number of rows
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46 @type nbLines: int
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47 @ivar verbosity: verbosity
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48 @type verbosity: int
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49 """
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50
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51 def __init__(self, connection, name, verbosity = 0):
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52 """
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53 Constructor
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54 Possibly retrieve column names and types if table exists
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55 @param mySqlConnection: connection to a databas
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56 @type mySqlConnection: class L{MySqlConnection<MySqlConnection>}
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57 @param name: name of the table
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58 @type name: string
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59 @param verbosity: verbosity
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60 @type verbosity: int
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61 """
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62 self.name = name
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63 self.variables = []
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64 self.types = {}
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65 self.sizes = {}
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66 self.nbLines = None
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67 self.verbosity = verbosity
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68 self.mySqlConnection = connection
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69 queryTables = self.mySqlConnection.executeQuery("SELECT name FROM sqlite_master WHERE type LIKE 'table' AND name LIKE '%s'" % (self.name))
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70 self.created = not queryTables.isEmpty()
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71 if self.created:
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72 queryFields = self.mySqlConnection.executeQuery("PRAGMA table_info('%s')" % (name))
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73 for field in queryFields.getIterator():
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74 if field[1] != "id":
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75 self.variables.append(field[1])
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76 self.types[field[1]] = field[2]
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77 self.sizes[field[1]] = field[3]
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78
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79
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80 def getName(self):
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81 return self.name
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82
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83
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84 def create(self, variables, types, sizes):
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85 """
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86 Create a table using give column names and types
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87 @param variables: names of the columns
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88 @type variables: list of string
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89 @param types: types of the columns
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90 @type types: dict of string
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91 @param sizes: sizes of the types
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92 @type sizes: dict of int
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93 """
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94 self.variables = variables
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95 self.types = types
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96 self.sizes = sizes
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97 if self.created:
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98 self.remove()
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99 query = "CREATE TABLE '%s' (id INTEGER PRIMARY KEY" % (self.name)
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100 for variable in variables:
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101 query = "%s, %s %s(%d)" % (query, variable, types[variable], sizes[variable])
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102 query += ")"
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103 self.mySqlConnection.executeQuery(query)
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104 self.created = True
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105
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106
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107 def insertMany(self, lines):
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108 """
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109 Insert many lines
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110 @param lines: the list of values
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111 @type lines: list of lists
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112 """
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113 commands = []
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114 for values in lines:
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115 commands.append("INSERT INTO '%s' (%s) VALUES (%s)" % (self.name, ", ".join(self.variables), ", ".join([MySqlTable.formatSql(values[variable], self.types[variable], self.sizes[variable]) for variable in self.variables])))
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116 self.mySqlConnection.executeManyQueries(commands)
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117
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118
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119 def rename(self, name):
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120 """
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121 Rename the table
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122 @param name: the new name
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123 @type name: string
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124 """
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125 self.mySqlConnection.executeQuery("RENAME TABLE '%s' TO '%s'" % (self.name, name))
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126 self.name = name
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127
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128
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129 def copy(self, table):
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130 """
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131 Copy the given table this one
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132 @param table: the table to be copied
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133 @type table: class L{MySqlTable<MySqlTable>}
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134 """
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135 variables = []
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136 types = {}
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137 sizes = {}
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138 fields = self.mySqlConnection.executeQuery("PRAGMA table_info(%s)" % (table.name))
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139 for field in fields.getIterator():
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140 if field[1] != "id":
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141 variables.append(field[1])
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142 m = re.search(r"(\w+)\((\d+)\)", field[2])
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143 if m == None:
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144 raise Exception("\nFormat %s in table %s is strange." % (field[2], table.name))
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145 types[field[1]] = m.group(1)
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146 sizes[field[1]] = int(m.group(2))
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147 self.create(variables, types, sizes)
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148 self.mySqlConnection.executeQuery("INSERT INTO '%s' SELECT * FROM %s" % (self.name, table.name))
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149
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150
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151 def add(self, table):
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152 """
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153 Add the content of a table to this one
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154 @param table: the table to be added
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155 @type table: class L{MySqlTable<MySqlTable>}
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156 """
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157 self.mySqlConnection.executeQuery("INSERT INTO '%s' SELECT * FROM %s" % (self.name, table.name))
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158 self.created = True
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159
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160
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161 def exists(self):
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162 """
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163 Check if the table exists in mySQL
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164 @return: true if it exits
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165 """
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166 return self.created
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167
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168
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169 def remove(self):
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170 """
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171 Remove this table
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172 """
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173 if self.exists():
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174 query = "DROP TABLE IF EXISTS '%s'" % (self.name)
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175 self.mySqlConnection.executeQuery(query)
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176 self.created = False
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177
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178
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179 def clear(self):
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180 """
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181 Clear the content of this table
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182 """
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183 self.mySqlConnection.executeQuery("DELETE FROM '%s'" % (self.name))
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184
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185
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186 def getNbElements(self):
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187 """
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188 Count the number of rows in the table
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189 """
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190 command = "SELECT COUNT(id) FROM '%s'" % (self.name)
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191 query = self.mySqlConnection.executeQuery(command)
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192 return int(query.getLine()[0])
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193
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194
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195 def formatSql(self, value, type, size):
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196 """
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197 Format a value using MySQL encapsulation
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198 """
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199 if type.find("int") != -1:
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200 return "%d" % value
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201 if type.find("float") != -1:
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202 return "%.10f" % value
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203 if type.find("double") != -1:
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204 return "%.20f" % value
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205 if type.find("varchar") != -1:
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206 if len(value) > size:
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207 return "'%s'" % value[0:size]
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208 return "'%s'" % value
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209 raise Exception("Do not understand type %s" % (type))
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210 formatSql = classmethod(formatSql)
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211
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212
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213 def addLine(self, values):
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214 """
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215 Add a row to this table
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216 @param values: the values of the row
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217 @type values: dict
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218 @return: the id of the added row
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219 """
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220 sqlValues = []
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221 for variable in self.variables:
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222 sqlValues.append(self.formatSql(values[variable], self.types[variable], self.sizes[variable]))
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223 command = "INSERT INTO '%s' (%s) VALUES (%s)" % (self.name, ", ".join(self.variables), ", ".join(sqlValues))
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224 id = self.mySqlConnection.executeQuery(command, True)
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225 return id
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226
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227
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228 def retrieveFromId(self, id):
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229 """
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230 Retrieve a row from its id
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231 @param id: the id of the row
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232 @type id: int
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233 @return: the row
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234 """
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235 query = self.mySqlConnection.executeQuery("SELECT * FROM '%s' WHERE id = %d" % (self.name, id))
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236 result = query.getLine()
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237 if result == None:
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238 raise Exception("Error! Id %d is not in the table %s!" % (id, self.name))
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239 return result
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240
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241
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242 def retrieveBulkFromId(self, ids):
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243 """
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244 Retrieve a row from its id
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245 @param id: the ids of the row
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246 @type id: list of int
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247 @return: the row
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248 """
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249 if not ids:
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250 return []
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251 MAXSIZE = 1000
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252 results = []
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253 for batch in range(len(ids) / MAXSIZE + 1):
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254 theseIds = ids[batch * MAXSIZE : (batch+1) * MAXSIZE]
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255 if theseIds:
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256 query = self.mySqlConnection.executeQuery("SELECT * FROM '%s' WHERE id IN (%s)" % (self.name, ", ".join(["%d" % (id) for id in theseIds])))
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257 lines = query.getLines()
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258 if len(lines) != len(theseIds):
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259 raise Exception("Error! Some Ids of (%s) is are missing in the table '%s' (got %d instead of %d)!" % (", ".join(["%d" % (id) for id in theseIds]), self.name, len(lines)), len(theseIds))
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260 results.extend(lines)
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261 return results
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262
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263
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264 def removeFromId(self, id):
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265 """
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266 Remove a row from its id
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267 @param id: the id of the row
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268 @type id: int
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269 """
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270 self.mySqlConnection.executeQuery("DELETE FROM '%s' WHERE id = %d" % (self.name, id))
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271
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272
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273 def getIterator(self):
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274 """
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275 Iterate on the content of table
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276 @return: iterator to the rows of the table
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277 """
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278 if not self.created:
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279 return
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280 MAXSIZE = 1000
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281 query = self.mySqlConnection.executeQuery("SELECT count(id) FROM '%s'" % (self.name))
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282 nbRows = int(query.getLine()[0])
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283 for chunk in range((nbRows / MAXSIZE) + 1):
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284 query = self.mySqlConnection.executeQuery("SELECT * FROM '%s' LIMIT %d, %d" % (self.name, chunk * MAXSIZE, MAXSIZE))
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285 for line in query.getIterator():
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286 yield line
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287
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288
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289 def createIndex(self, indexName, values, unique = False, fullText = False):
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290 """
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291 Add an index on the table
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292 @param indexName: name of the index
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293 @type indexName: string
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294 @param values: values to be indexed
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295 @type values: string
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296 @param unique: if the index is unique
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297 @type unique: boolean
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298 @param fullText: whether full text should be indexed
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299 @type fullText: boolean
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300 """
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301 self.mySqlConnection.executeQuery("CREATE %s%sINDEX '%s' ON '%s' (%s)" % ("UNIQUE " if unique else "", "FULLTEXT " if fullText else "", indexName, self.name, ", ".join(values)))
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302
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303
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304 def setDefaultTagValue(self, field, name, value):
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305 """
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306 Add a tag value
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307 @param name: name of the tag
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308 @type name: string
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309 @param value: value of the tag
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310 @type value: string or int
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311 """
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312 newData = {}
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313 for line in MySqlTable.getIterator(self):
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314 id = line[0]
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315 tags = line[field]
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316 if tags == '':
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317 newTag = "%s=%s" % (name, value)
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318 else:
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319 newTag = "%s;%s=%s" % (tags, name, value)
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320 if name not in [tag.split("=")[0] for tag in tags.split(";")]:
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321 newData[id] = newTag
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322 for id, tag in newData.iteritems():
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323 query = self.mySqlConnection.executeQuery("UPDATE '%s' SET tags = '%s' WHERE id = %i" % (self.name, tag, id))
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324
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325
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326
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327 def show(self):
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328 """
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329 Drop the content of the current table
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330 """
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331 query = self.mySqlConnection.executeQuery("SELECT * FROM '%s'" % (self.name))
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332 print query.getLines()
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333
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334
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