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1 #include <stdlib.h>
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2 #include <stdio.h>
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3 #include <string.h>
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4 #include <libpq-fe.h>
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5
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6 static char *escapeLiteral(PGconn *conn, const char *str, size_t len) {
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7 // provides compatibility for PostgreSQL versions prior 9.0
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8 // in future: return PQescapeLiteral(conn, str, len);
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9 char *res;
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10 size_t res_len;
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11 res = malloc(2*len+3);
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12 res[0] = '\'';
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13 res_len = PQescapeStringConn(conn, res+1, str, len, NULL);
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14 res[res_len+1] = '\'';
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15 res[res_len+2] = 0;
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16 return res;
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17 }
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18
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19 static void freemem(void *ptr) {
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20 // to be used for "escapeLiteral" function
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21 // provides compatibility for PostgreSQL versions prior 9.0
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22 // in future: PQfreemem(ptr);
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23 free(ptr);
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24 }
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25
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26 int main(int argc, char **argv) {
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27
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28 // variable declarations:
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29 int err = 0;
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30 int i, count;
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31 char *conninfo;
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32 PGconn *db;
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33 PGresult *res;
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34
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35 // parse command line:
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36 if (argc == 0) return 1;
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37 if (argc == 1 || !strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
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38 FILE *out;
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39 out = argc == 1 ? stderr : stdout;
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40 fprintf(stdout, "\n");
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41 fprintf(stdout, "Usage: %s <conninfo>\n", argv[0]);
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42 fprintf(stdout, "\n");
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43 fprintf(stdout, "<conninfo> is specified by PostgreSQL's libpq,\n");
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44 fprintf(stdout, "see http://www.postgresql.org/docs/9.1/static/libpq-connect.html\n");
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45 fprintf(stdout, "\n");
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46 fprintf(stdout, "Example: %s dbname=liquid_feedback\n", argv[0]);
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47 fprintf(stdout, "\n");
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48 return argc == 1 ? 1 : 0;
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49 }
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50 {
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51 size_t len = 0;
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52 for (i=1; i<argc; i++) len += strlen(argv[i]) + 1;
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53 conninfo = malloc(len * sizeof(char));
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54 if (!conninfo) {
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55 fprintf(stderr, "Error: Could not allocate memory for conninfo string\n");
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56 return 1;
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57 }
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58 conninfo[0] = 0;
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59 for (i=1; i<argc; i++) {
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60 if (i>1) strcat(conninfo, " ");
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61 strcat(conninfo, argv[i]);
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62 }
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63 }
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64
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65 // connect to database:
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66 db = PQconnectdb(conninfo);
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67 if (!db) {
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68 fprintf(stderr, "Error: Could not create database handle\n");
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69 return 1;
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70 }
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71 if (PQstatus(db) != CONNECTION_OK) {
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72 fprintf(stderr, "Could not open connection:\n%s", PQerrorMessage(db));
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73 return 1;
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74 }
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75
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76 // delete expired sessions:
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77 res = PQexec(db, "DELETE FROM \"expired_session\"");
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78 if (!res) {
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79 fprintf(stderr, "Error in pqlib while sending SQL command deleting expired sessions\n");
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80 err = 1;
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81 } else if (
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82 PQresultStatus(res) != PGRES_COMMAND_OK &&
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83 PQresultStatus(res) != PGRES_TUPLES_OK
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84 ) {
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85 fprintf(stderr, "Error while executing SQL command deleting expired sessions:\n%s", PQresultErrorMessage(res));
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86 err = 1;
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87 PQclear(res);
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88 } else {
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89 PQclear(res);
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90 }
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91
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92 // check member activity:
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93 res = PQexec(db, "SET TRANSACTION ISOLATION LEVEL READ COMMITTED; SELECT \"check_activity\"()");
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94 if (!res) {
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95 fprintf(stderr, "Error in pqlib while sending SQL command checking member activity\n");
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96 err = 1;
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97 } else if (
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98 PQresultStatus(res) != PGRES_COMMAND_OK &&
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99 PQresultStatus(res) != PGRES_TUPLES_OK
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100 ) {
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101 fprintf(stderr, "Error while executing SQL command checking member activity:\n%s", PQresultErrorMessage(res));
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102 err = 1;
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103 PQclear(res);
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104 } else {
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105 PQclear(res);
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106 }
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107
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108 // calculate member counts:
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109 res = PQexec(db, "SET TRANSACTION ISOLATION LEVEL REPEATABLE READ; SELECT \"calculate_member_counts\"()");
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110 if (!res) {
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111 fprintf(stderr, "Error in pqlib while sending SQL command calculating member counts\n");
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112 err = 1;
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113 } else if (
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114 PQresultStatus(res) != PGRES_COMMAND_OK &&
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115 PQresultStatus(res) != PGRES_TUPLES_OK
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116 ) {
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117 fprintf(stderr, "Error while executing SQL command calculating member counts:\n%s", PQresultErrorMessage(res));
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118 err = 1;
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119 PQclear(res);
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120 } else {
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121 PQclear(res);
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122 }
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123
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124 // update open issues:
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125 res = PQexec(db, "SELECT \"id\" FROM \"open_issue\"");
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126 if (!res) {
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127 fprintf(stderr, "Error in pqlib while sending SQL command selecting open issues\n");
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128 err = 1;
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129 } else if (PQresultStatus(res) != PGRES_TUPLES_OK) {
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130 fprintf(stderr, "Error while executing SQL command selecting open issues:\n%s", PQresultErrorMessage(res));
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131 err = 1;
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132 PQclear(res);
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133 } else {
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134 count = PQntuples(res);
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135 for (i=0; i<count; i++) {
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136 char *issue_id, *escaped_issue_id;
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137 PGresult *res2, *old_res2;
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138 int j;
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139 issue_id = PQgetvalue(res, i, 0);
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140 escaped_issue_id = escapeLiteral(db, issue_id, strlen(issue_id));
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141 old_res2 = NULL;
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142 for (j=0; ; j++) {
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143 if (j >= 20) { // safety to avoid endless loops
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144 fprintf(stderr, "Function \"check_issue\"(...) returned non-null value too often.\n");
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145 err = 1;
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146 if (j > 0) PQclear(old_res2);
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147 break;
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148 }
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149 if (j == 0) {
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150 char *cmd;
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151 if (asprintf(&cmd, "SET TRANSACTION ISOLATION LEVEL REPEATABLE READ; SELECT \"check_issue\"(%s, NULL)", escaped_issue_id) < 0) {
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152 fprintf(stderr, "Could not prepare query string in memory.\n");
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153 err = 1;
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154 break;
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155 }
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156 res2 = PQexec(db, cmd);
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157 free(cmd);
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158 } else {
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159 char *persist, *escaped_persist, *cmd;
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160 persist = PQgetvalue(old_res2, 0, 0);
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161 escaped_persist = escapeLiteral(db, persist, strlen(persist));
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162 if (asprintf(&cmd, "SET TRANSACTION ISOLATION LEVEL REPEATABLE READ; SELECT \"check_issue\"(%s, %s::\"check_issue_persistence\")", escaped_issue_id, escaped_persist) < 0) {
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163 freemem(escaped_persist);
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164 fprintf(stderr, "Could not prepare query string in memory.\n");
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165 err = 1;
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166 PQclear(old_res2);
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167 break;
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168 }
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169 freemem(escaped_persist);
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170 res2 = PQexec(db, cmd);
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171 free(cmd);
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172 PQclear(old_res2);
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173 }
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174 if (!res2) {
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175 fprintf(stderr, "Error in pqlib while sending SQL command to call function \"check_issue\"(...):\n");
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176 err = 1;
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177 break;
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178 } else if (
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179 PQresultStatus(res2) != PGRES_COMMAND_OK &&
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180 PQresultStatus(res2) != PGRES_TUPLES_OK
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181 ) {
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182 fprintf(stderr, "Error while calling SQL function \"check_issue\"(...):\n%s", PQresultErrorMessage(res2));
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183 err = 1;
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184 PQclear(res2);
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185 break;
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186 } else {
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187 if (PQntuples(res2) >= 1 && !PQgetisnull(res2, 0, 0)) {
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188 old_res2 = res2;
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189 } else {
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190 PQclear(res2);
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191 break;
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192 }
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193 }
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194 }
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195 freemem(escaped_issue_id);
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196 }
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197 PQclear(res);
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198 }
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199
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200 // cleanup and exit
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201 PQfinish(db);
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202 return err;
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203
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204 }
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