Mercurial > gemma
annotate schema/manage_users.sql @ 1030:bf10a7f990cc
refac: fairway profile retrieves current data from store
author | Thomas Junk <thomas.junk@intevation.de> |
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date | Wed, 24 Oct 2018 15:09:06 +0200 |
parents | 3af7ca761f6a |
children | 6590208e3ee1 |
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1 -- |
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2 -- Functions encapsulating user management functionality and |
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3 -- exposing it to appropriately privileged users |
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4 -- |
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5 |
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6 CREATE OR REPLACE FUNCTION internal.check_password( |
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7 pw varchar |
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8 ) |
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9 RETURNS varchar |
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10 AS $$ |
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11 DECLARE |
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12 min_len CONSTANT int = 8; |
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13 BEGIN |
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14 IF char_length(pw) < min_len |
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15 OR pw NOT SIMILAR TO '%[^[:alnum:]]%' |
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16 OR pw NOT SIMILAR TO '%[[:digit:]]%' |
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17 THEN |
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18 RAISE invalid_password USING MESSAGE = 'Invalid password'; |
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19 ELSE |
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20 RETURN pw; |
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21 END IF; |
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22 END; |
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23 $$ |
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24 LANGUAGE plpgsql; |
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25 |
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26 |
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27 CREATE OR REPLACE VIEW users.list_users WITH (security_barrier) AS |
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28 SELECT |
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29 r.rolname, |
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30 p.username, |
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31 CAST('' AS varchar) AS pw, |
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32 p.country, |
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33 p.map_extent, |
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34 p.email_address |
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35 FROM internal.user_profiles p |
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36 JOIN pg_roles u ON p.username = u.rolname |
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37 JOIN pg_auth_members a ON u.oid = a.member |
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38 JOIN pg_roles r ON a.roleid = r.oid |
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39 WHERE p.username = current_user |
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40 OR pg_has_role('waterway_admin', 'MEMBER') |
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41 AND p.country = ( |
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42 SELECT country FROM internal.user_profiles |
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43 WHERE username = current_user) |
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44 OR pg_has_role('sys_admin', 'MEMBER'); |
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45 |
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46 |
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47 CREATE OR REPLACE FUNCTION users.current_user_country() |
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48 RETURNS internal.user_profiles.country%TYPE |
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49 AS $$ |
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50 SELECT country FROM users.list_users |
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51 WHERE username = current_user |
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52 $$ |
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53 LANGUAGE SQL |
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54 STABLE PARALLEL SAFE; |
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55 |
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56 |
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57 CREATE OR REPLACE FUNCTION internal.create_user() RETURNS trigger |
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58 AS $$ |
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59 BEGIN |
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60 IF NEW.map_extent IS NULL |
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61 THEN |
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62 NEW.map_extent = ST_Extent(CAST(area AS geometry)) |
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63 FROM users.responsibility_areas ra |
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64 WHERE ra.country = NEW.country; |
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65 END IF; |
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66 INSERT INTO internal.user_profiles ( |
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67 username, country, map_extent, email_address) |
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68 VALUES (NEW.username, NEW.country, NEW.map_extent, NEW.email_address); |
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69 EXECUTE format( |
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70 'CREATE ROLE %I IN ROLE %I LOGIN PASSWORD %L', |
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71 NEW.username, |
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72 NEW.rolname, |
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73 internal.check_password(NEW.pw)); |
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74 |
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75 -- Do not leak new password |
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76 NEW.pw = ''; |
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77 RETURN NEW; |
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78 END; |
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79 $$ |
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80 LANGUAGE plpgsql |
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81 SECURITY DEFINER; |
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82 |
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83 CREATE TRIGGER create_user INSTEAD OF INSERT ON users.list_users FOR EACH ROW |
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84 EXECUTE PROCEDURE internal.create_user(); |
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85 |
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86 CREATE OR REPLACE FUNCTION internal.update_metamorph() RETURNS trigger |
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87 AS $$ |
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88 BEGIN |
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89 EXECUTE format('GRANT %I TO metamorph', NEW.username); |
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90 RETURN NEW; |
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91 END; |
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92 $$ |
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93 LANGUAGE plpgsql |
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94 SECURITY DEFINER; |
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95 |
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96 -- Note that PostgreSQL fires triggers for the same event in alphabetical |
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97 -- order! Make sure that the new role is created before this trigger is fired. |
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98 CREATE TRIGGER update_metamorph INSTEAD OF INSERT ON users.list_users |
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99 FOR EACH ROW |
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100 EXECUTE PROCEDURE internal.update_metamorph(); |
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101 |
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102 |
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103 -- Prevent roles other than sys_admin to update any user but |
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104 -- themselves (affects waterway_admin) |
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105 CREATE OR REPLACE FUNCTION internal.authorize_update_user() RETURNS trigger |
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106 AS $$ |
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107 BEGIN |
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108 IF OLD.username <> current_user |
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109 AND NOT pg_has_role('sys_admin', 'MEMBER') |
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110 THEN |
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111 RETURN NULL; |
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112 ELSE |
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113 RETURN NEW; |
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114 END IF; |
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115 END; |
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116 $$ |
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117 LANGUAGE plpgsql; |
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118 |
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119 -- Note that PostgreSQL fires triggers for the same event in alphabetical |
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120 -- order! Make sure that authorization takes place before any other trigger |
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121 -- is fired that might execute otherwise unauthorized statements! |
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122 CREATE TRIGGER authorize_update_user INSTEAD OF UPDATE ON users.list_users |
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123 FOR EACH ROW |
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124 EXECUTE PROCEDURE internal.authorize_update_user(); |
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125 |
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126 |
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127 CREATE OR REPLACE FUNCTION internal.update_user() RETURNS trigger |
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128 AS $$ |
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129 DECLARE |
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130 cur_username varchar; |
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131 BEGIN |
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132 cur_username = OLD.username; |
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133 |
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134 UPDATE internal.user_profiles p |
233 | 135 SET (username, country, map_extent, email_address) |
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136 = (NEW.username, NEW.country, NEW.map_extent, NEW.email_address) |
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137 WHERE p.username = cur_username; |
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138 |
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139 IF NEW.username <> cur_username |
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140 THEN |
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141 EXECUTE format( |
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142 'ALTER ROLE %I RENAME TO %I', cur_username, NEW.username); |
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143 cur_username = NEW.username; |
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144 END IF; |
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145 |
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146 IF NEW.rolname <> OLD.rolname |
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147 THEN |
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148 EXECUTE format( |
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149 'REVOKE %I FROM %I', OLD.rolname, cur_username); |
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150 EXECUTE format( |
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151 'GRANT %I TO %I', NEW.rolname, cur_username); |
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152 END IF; |
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153 |
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154 IF NEW.pw IS NOT NULL AND NEW.pw <> '' |
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155 THEN |
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156 EXECUTE format( |
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157 'ALTER ROLE %I PASSWORD %L', |
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158 cur_username, |
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159 internal.check_password(NEW.pw)); |
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160 END IF; |
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161 |
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162 -- Do not leak new password |
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163 NEW.pw = ''; |
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164 RETURN NEW; |
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165 END; |
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166 $$ |
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167 LANGUAGE plpgsql |
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168 SECURITY DEFINER; |
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169 |
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170 CREATE TRIGGER update_user INSTEAD OF UPDATE ON users.list_users FOR EACH ROW |
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171 EXECUTE PROCEDURE internal.update_user(); |
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172 |
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173 |
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174 CREATE OR REPLACE FUNCTION internal.delete_user() RETURNS trigger |
232
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175 AS $$ |
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176 DECLARE |
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177 bid int; |
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178 BEGIN |
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179 -- Terminate the users backends started before the current transaction |
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180 FOR bid IN SELECT pid FROM pg_stat_activity WHERE usename = OLD.username |
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181 LOOP |
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182 PERFORM pg_terminate_backend(bid); |
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183 END LOOP; |
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184 -- Note that any backend that might be started during the transaction |
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185 -- in which this function is executed will not be terminated but lost |
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186 -- without any privileges after commiting this transaction |
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187 |
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188 -- Delete user |
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189 EXECUTE format('DROP ROLE %I', OLD.username); |
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190 DELETE FROM internal.user_profiles p |
342
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191 WHERE p.username = OLD.username; |
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192 |
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193 RETURN OLD; |
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194 END; |
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195 $$ |
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196 LANGUAGE plpgsql |
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197 SECURITY DEFINER; |
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198 |
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199 CREATE TRIGGER delete_user INSTEAD OF DELETE ON users.list_users FOR EACH ROW |
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200 EXECUTE PROCEDURE internal.delete_user(); |
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201 |
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202 |
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203 -- To set a role from a hex-encoded user name (which is save from SQL injections). |
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204 CREATE OR REPLACE FUNCTION public.setrole(role text) RETURNS void |
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205 AS $$ |
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206 BEGIN |
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207 IF role IS NOT NULL AND role <> '' THEN |
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208 EXECUTE format('SET ROLE %I', convert_from(decode(role, 'hex'), 'UTF-8')); |
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209 END IF; |
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210 END; |
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211 $$ |
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212 LANGUAGE plpgsql; |
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213 |
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214 -- To set a role in form of a plannable statement (which is save from SQL injections). |
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215 CREATE OR REPLACE FUNCTION public.setrole_plan(role text) RETURNS void |
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216 AS $$ |
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217 BEGIN |
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218 IF role IS NOT NULL AND role <> '' THEN |
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219 EXECUTE format('SET ROLE %I', role); |
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220 END IF; |
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221 END; |
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222 $$ |
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223 LANGUAGE plpgsql; |