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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 if (!res) return NULL;
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13 res[0] = '\'';
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14 res_len = PQescapeStringConn(conn, res+1, str, len, NULL);
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15 res[res_len+1] = '\'';
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16 res[res_len+2] = 0;
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17 return res;
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18 }
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19
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20 static void freemem(void *ptr) {
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21 // to be used for "escapeLiteral" function
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22 // provides compatibility for PostgreSQL versions prior 9.0
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23 // in future: PQfreemem(ptr);
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24 free(ptr);
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25 }
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26
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27 int main(int argc, char **argv) {
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28
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29 // variable declarations:
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30 int err = 0;
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31 int i, count;
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32 char *conninfo;
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33 PGconn *db;
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34 PGresult *res;
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35
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36 // parse command line:
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37 if (argc == 0) return 1;
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38 if (argc == 1 || !strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
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39 FILE *out;
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40 out = argc == 1 ? stderr : stdout;
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jbe@362
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41 fprintf(out, "\n");
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42 fprintf(out, "Usage: %s <conninfo>\n", argv[0]);
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jbe@362
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43 fprintf(out, "\n");
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44 fprintf(out, "<conninfo> is specified by PostgreSQL's libpq,\n");
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45 fprintf(out, "see http://www.postgresql.org/docs/9.1/static/libpq-connect.html\n");
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46 fprintf(out, "\n");
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47 fprintf(out, "Example: %s dbname=liquid_feedback\n", argv[0]);
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48 fprintf(out, "\n");
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49 return argc == 1 ? 1 : 0;
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50 }
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51 {
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52 size_t len = 0;
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53 for (i=1; i<argc; i++) len += strlen(argv[i]) + 1;
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54 conninfo = malloc(len * sizeof(char));
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55 if (!conninfo) {
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56 fprintf(stderr, "Error: Could not allocate memory for conninfo string\n");
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57 return 1;
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58 }
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59 conninfo[0] = 0;
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60 for (i=1; i<argc; i++) {
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61 if (i>1) strcat(conninfo, " ");
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62 strcat(conninfo, argv[i]);
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63 }
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64 }
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65
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66 // connect to database:
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67 db = PQconnectdb(conninfo);
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68 if (!db) {
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69 fprintf(stderr, "Error: Could not create database handle\n");
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70 return 1;
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71 }
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72 if (PQstatus(db) != CONNECTION_OK) {
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73 fprintf(stderr, "Could not open connection:\n%s", PQerrorMessage(db));
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74 return 1;
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75 }
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76
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77 // delete expired sessions:
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78 res = PQexec(db, "DELETE FROM \"expired_session\"");
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79 if (!res) {
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80 fprintf(stderr, "Error in pqlib while sending SQL command deleting expired sessions\n");
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81 err = 1;
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82 } else if (
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83 PQresultStatus(res) != PGRES_COMMAND_OK &&
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84 PQresultStatus(res) != PGRES_TUPLES_OK
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85 ) {
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86 fprintf(stderr, "Error while executing SQL command deleting expired sessions:\n%s", PQresultErrorMessage(res));
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87 err = 1;
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88 PQclear(res);
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89 } else {
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90 PQclear(res);
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91 }
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92
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93 // check member activity:
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94 res = PQexec(db, "SET TRANSACTION ISOLATION LEVEL READ COMMITTED; SELECT \"check_activity\"()");
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95 if (!res) {
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96 fprintf(stderr, "Error in pqlib while sending SQL command checking member activity\n");
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97 err = 1;
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98 } else if (
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99 PQresultStatus(res) != PGRES_COMMAND_OK &&
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100 PQresultStatus(res) != PGRES_TUPLES_OK
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101 ) {
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102 fprintf(stderr, "Error while executing SQL command checking member activity:\n%s", PQresultErrorMessage(res));
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103 err = 1;
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104 PQclear(res);
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105 } else {
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106 PQclear(res);
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107 }
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108
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109 // calculate member counts:
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110 res = PQexec(db, "SET TRANSACTION ISOLATION LEVEL REPEATABLE READ; SELECT \"calculate_member_counts\"()");
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111 if (!res) {
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112 fprintf(stderr, "Error in pqlib while sending SQL command calculating member counts\n");
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113 err = 1;
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114 } else if (
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115 PQresultStatus(res) != PGRES_COMMAND_OK &&
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116 PQresultStatus(res) != PGRES_TUPLES_OK
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117 ) {
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118 fprintf(stderr, "Error while executing SQL command calculating member counts:\n%s", PQresultErrorMessage(res));
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119 err = 1;
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120 PQclear(res);
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121 } else {
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122 PQclear(res);
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123 }
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124
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125 // update open issues:
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126 res = PQexec(db, "SELECT \"id\" FROM \"open_issue\"");
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127 if (!res) {
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128 fprintf(stderr, "Error in pqlib while sending SQL command selecting open issues\n");
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129 err = 1;
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130 } else if (PQresultStatus(res) != PGRES_TUPLES_OK) {
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131 fprintf(stderr, "Error while executing SQL command selecting open issues:\n%s", PQresultErrorMessage(res));
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132 err = 1;
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133 PQclear(res);
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134 } else {
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135 count = PQntuples(res);
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136 for (i=0; i<count; i++) {
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137 char *issue_id, *escaped_issue_id;
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138 PGresult *res2, *old_res2;
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139 int j;
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140 issue_id = PQgetvalue(res, i, 0);
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141 escaped_issue_id = escapeLiteral(db, issue_id, strlen(issue_id));
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142 if (!escaped_issue_id) {
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143 fprintf(stderr, "Could not escape literal in memory.\n");
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144 err = 1;
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145 break;
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146 }
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147 old_res2 = NULL;
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148 for (j=0; ; j++) {
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149 if (j >= 20) { // safety to avoid endless loops
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150 fprintf(stderr, "Function \"check_issue\"(...) returned non-null value too often.\n");
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151 err = 1;
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152 if (j > 0) PQclear(old_res2);
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153 break;
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154 }
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155 if (j == 0) {
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156 char *cmd;
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157 if (asprintf(&cmd, "SET TRANSACTION ISOLATION LEVEL REPEATABLE READ; SELECT \"check_issue\"(%s, NULL)", escaped_issue_id) < 0) {
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158 fprintf(stderr, "Could not prepare query string in memory.\n");
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159 err = 1;
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160 break;
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161 }
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162 res2 = PQexec(db, cmd);
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163 free(cmd);
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164 } else {
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165 char *persist, *escaped_persist, *cmd;
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166 persist = PQgetvalue(old_res2, 0, 0);
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167 escaped_persist = escapeLiteral(db, persist, strlen(persist));
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168 if (!escaped_persist) {
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169 fprintf(stderr, "Could not escape literal in memory.\n");
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170 err = 1;
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171 PQclear(old_res2);
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172 break;
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173 }
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174 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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175 freemem(escaped_persist);
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176 fprintf(stderr, "Could not prepare query string in memory.\n");
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177 err = 1;
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178 PQclear(old_res2);
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179 break;
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180 }
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181 freemem(escaped_persist);
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182 res2 = PQexec(db, cmd);
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183 free(cmd);
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184 PQclear(old_res2);
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185 }
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186 if (!res2) {
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187 fprintf(stderr, "Error in pqlib while sending SQL command to call function \"check_issue\"(...):\n");
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188 err = 1;
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189 break;
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190 } else if (
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191 PQresultStatus(res2) != PGRES_COMMAND_OK &&
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192 PQresultStatus(res2) != PGRES_TUPLES_OK
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193 ) {
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194 fprintf(stderr, "Error while calling SQL function \"check_issue\"(...):\n%s", PQresultErrorMessage(res2));
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195 err = 1;
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196 PQclear(res2);
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197 break;
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198 } else {
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199 if (PQntuples(res2) >= 1 && !PQgetisnull(res2, 0, 0)) {
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200 old_res2 = res2;
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201 } else {
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202 PQclear(res2);
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203 break;
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204 }
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205 }
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206 }
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207 freemem(escaped_issue_id);
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208 }
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209 PQclear(res);
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210 }
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211
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212 // cleanup and exit:
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213 PQfinish(db);
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214 return err;
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215
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216 }
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