Mercurial > gemma
annotate schema/manage_users.sql @ 462:62a0adc8cdcd
Merged.
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Wed, 22 Aug 2018 16:20:09 +0200 |
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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('pw_reset', 'MEMBER') |
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45 OR pg_has_role('sys_admin', 'MEMBER'); |
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46 |
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47 |
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48 CREATE OR REPLACE FUNCTION users.current_user_country() |
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49 RETURNS internal.user_profiles.country%TYPE |
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50 AS $$ |
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51 SELECT country FROM users.list_users |
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52 WHERE username = current_user |
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53 $$ |
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54 LANGUAGE SQL |
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55 STABLE PARALLEL SAFE; |
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56 |
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57 |
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58 CREATE OR REPLACE FUNCTION internal.create_user() RETURNS trigger |
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59 AS $$ |
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60 BEGIN |
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61 IF NEW.map_extent IS NULL |
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62 THEN |
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63 NEW.map_extent = ST_Extent(CAST(area AS geometry)) |
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64 FROM users.responsibility_areas ra |
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65 WHERE ra.country = NEW.country; |
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66 END IF; |
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67 INSERT INTO internal.user_profiles ( |
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68 username, country, map_extent, email_address) |
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69 VALUES (NEW.username, NEW.country, NEW.map_extent, NEW.email_address); |
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70 EXECUTE format( |
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71 'CREATE ROLE %I IN ROLE %I LOGIN PASSWORD %L', |
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72 NEW.username, |
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73 NEW.rolname, |
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74 internal.check_password(NEW.pw)); |
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75 |
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76 -- Do not leak new password |
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77 NEW.pw = ''; |
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78 RETURN NEW; |
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79 END; |
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80 $$ |
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81 LANGUAGE plpgsql |
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82 SECURITY DEFINER; |
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83 |
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84 CREATE TRIGGER create_user INSTEAD OF INSERT ON users.list_users FOR EACH ROW |
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85 EXECUTE PROCEDURE internal.create_user(); |
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86 |
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87 |
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88 -- Prevent roles other than sys_admin and pw_reset to update any user but |
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89 -- themselves (affects waterway_admin) |
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90 CREATE OR REPLACE FUNCTION internal.authorize_update_user() RETURNS trigger |
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91 AS $$ |
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92 BEGIN |
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93 IF OLD.username <> current_user |
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94 AND NOT (pg_has_role('sys_admin', 'MEMBER') |
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95 OR pg_has_role('pw_reset', 'MEMBER')) |
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96 THEN |
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97 RETURN NULL; |
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98 ELSE |
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99 RETURN NEW; |
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100 END IF; |
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101 END; |
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102 $$ |
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103 LANGUAGE plpgsql; |
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104 |
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105 -- Note that PostgreSQL fires triggers for the same event in alphabetical |
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106 -- order! Make sure that authorization takes place before any other trigger |
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107 -- is fired that might execute otherwise unauthorized statements! |
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108 CREATE TRIGGER authorize_update_user INSTEAD OF UPDATE ON users.list_users |
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109 FOR EACH ROW |
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110 EXECUTE PROCEDURE internal.authorize_update_user(); |
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111 |
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112 |
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113 CREATE OR REPLACE FUNCTION internal.update_user() RETURNS trigger |
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114 AS $$ |
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115 DECLARE |
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116 cur_username varchar; |
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117 BEGIN |
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118 cur_username = OLD.username; |
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119 |
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120 UPDATE internal.user_profiles p |
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122 = (NEW.username, NEW.country, NEW.map_extent, NEW.email_address) |
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123 WHERE p.username = cur_username; |
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124 |
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125 IF NEW.username <> cur_username |
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126 THEN |
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127 EXECUTE format( |
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128 'ALTER ROLE %I RENAME TO %I', cur_username, NEW.username); |
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129 cur_username = NEW.username; |
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130 END IF; |
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131 |
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132 IF NEW.rolname <> OLD.rolname |
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133 THEN |
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134 EXECUTE format( |
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135 'REVOKE %I FROM %I', OLD.rolname, cur_username); |
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136 EXECUTE format( |
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137 'GRANT %I TO %I', NEW.rolname, cur_username); |
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138 END IF; |
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139 |
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140 IF NEW.pw IS NOT NULL AND NEW.pw <> '' |
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141 THEN |
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142 EXECUTE format( |
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143 'ALTER ROLE %I PASSWORD %L', |
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144 cur_username, |
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145 internal.check_password(NEW.pw)); |
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146 END IF; |
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147 |
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148 -- Do not leak new password |
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149 NEW.pw = ''; |
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150 RETURN NEW; |
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151 END; |
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152 $$ |
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153 LANGUAGE plpgsql |
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154 SECURITY DEFINER; |
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155 |
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156 CREATE TRIGGER update_user INSTEAD OF UPDATE ON users.list_users FOR EACH ROW |
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157 EXECUTE PROCEDURE internal.update_user(); |
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158 |
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159 |
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160 CREATE OR REPLACE FUNCTION internal.delete_user() RETURNS trigger |
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161 AS $$ |
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162 DECLARE |
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163 bid int; |
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164 BEGIN |
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165 -- Terminate the users backends started before the current transaction |
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166 FOR bid IN SELECT pid FROM pg_stat_activity WHERE usename = OLD.username |
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167 LOOP |
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168 PERFORM pg_terminate_backend(bid); |
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169 END LOOP; |
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170 -- Note that any backend that might be started during the transaction |
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171 -- in which this function is executed will not be terminated but lost |
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172 -- without any privileges after commiting this transaction |
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173 |
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174 -- Delete user |
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175 EXECUTE format('DROP ROLE %I', OLD.username); |
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176 DELETE FROM internal.user_profiles p |
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177 WHERE p.username = OLD.username; |
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178 |
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179 RETURN OLD; |
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180 END; |
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181 $$ |
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182 LANGUAGE plpgsql |
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183 SECURITY DEFINER; |
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184 |
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185 CREATE TRIGGER delete_user INSTEAD OF DELETE ON users.list_users FOR EACH ROW |
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186 EXECUTE PROCEDURE internal.delete_user(); |
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187 |
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188 |
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189 CREATE OR REPLACE VIEW pw_reset.list_users AS |
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190 SELECT username, pw, email_address FROM users.list_users; |