Updates

Author: melchisedech333

2 - create table.c

@@ -17,6 +17,40 @@ int main (int argc, char *argv[])
 
     printf("Connected!\n");
 
+    // Delete table if exists.
+    PGresult *res = PQexec(conn, "DROP TABLE IF EXISTS example");
+    
+    if (PQresultStatus(res) != PGRES_COMMAND_OK) {
+        fprintf(stderr, "Drop error, %s\n", PQerrorMessage(conn));    
+
+        PQclear(res);
+        PQfinish(conn);    
+
+        exit(1);
+    }
+    
+    PQclear(res);
+    printf("Drop table OK!\n");
+    
+    // Create new table.
+    res = PQexec(conn, 
+        " CREATE TABLE example (  "
+        "      id   INT,          "
+        "      name VARCHAR(100)  "
+        " );                    ");
+        
+    if (PQresultStatus(res) != PGRES_COMMAND_OK) {
+        fprintf(stderr, "Create error, %s\n", PQerrorMessage(conn));    
+
+        PQclear(res);
+        PQfinish(conn);    
+
+        exit(1);
+    }
+    
+    PQclear(res);
+    printf("Create table OK!\n");
+
     // Close connection.
     PQfinish(conn);
     printf("Disconnected!\n");

3 - insert item.c

@@ -0,0 +1,56 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <libpq-fe.h>
+#include "settings.h"
+
+int main (int argc, char *argv[])
+{
+    // Connect to the database.
+    PGconn *conn = PQconnectdb("host=" HOSTNAME " dbname=" DATABASE " user=" USERNAME " password=" PASSWORD);
+
+    if (PQstatus(conn) == CONNECTION_BAD) {
+        fprintf(stderr, "Connection to database failed: %s\n", PQerrorMessage(conn));
+        PQfinish(conn);
+        exit(0);
+    }
+
+    printf("Connected!\n");
+
+    // Insert new item.
+    char *stm = 
+        " INSERT INTO example ( "
+        "    id,                "
+        "    name               "
+        " ) VALUES (            "
+        "    $1, $2             "
+        " );                    ";
+    
+    int total_items   = 2;
+    char *items     []= {
+        "1",
+        "Test item"
+    };
+
+    PGresult *res = PQexecParams(
+            conn, stm, total_items, NULL, (const char * const*) items, NULL, NULL, 0);
+
+    if (PQresultStatus(res) != PGRES_COMMAND_OK) {
+        fprintf(stderr, "Insert error, %s\n", PQerrorMessage(conn));    
+
+        PQclear(res);
+        PQfinish(conn);    
+
+        exit(1);
+    }
+
+    printf("Item successfully inserted into the database.\n");
+
+    // Close connection.
+    PQfinish(conn);
+    printf("Disconnected!\n");
+
+    return 0;
+}
+
+

readme-pt.md

@@ -88,7 +88,8 @@ De uso geral:
 Códigos:
 
 - <b>1 - connect.c</b>: Realiza a conexão com o servidor. 
-- <b>2 - create table.c</b>: Cria uma nova tabela no banco de dados. 
+- <b>2 - create table.c</b>: Cria e exclui uma tabela no banco de dados. 
+- <b>3 - insert item.c</b>: Insere registros em uma tabela. 
 
 <br>