created basic connection, query + mapping data successful

Author: mikebionic

go.mod

@@ -0,0 +1,8 @@
+module github.com/mike-bionic/db-gateway-go
+
+go 1.16
+
+require (
+	github.com/go-sql-driver/mysql v1.6.0 // indirect
+	github.com/lib/pq v1.10.2 // indirect
+)

go.sum

@@ -0,0 +1,4 @@
+github.com/go-sql-driver/mysql v1.6.0 h1:BCTh4TKNUYmOmMUcQ3IipzF5prigylS7XXjEkfCHuOE=
+github.com/go-sql-driver/mysql v1.6.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
+github.com/lib/pq v1.10.2 h1:AqzbZs4ZoCBp+GtejcpCpcxM3zlSMx29dXbUSeVtJb8=
+github.com/lib/pq v1.10.2/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=

main.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+
+	_ "github.com/lib/pq"
+)
+
+func main() {
+
+	db_type := "postgres"
+	db_user := "postgres"
+	db_password := "123456"
+	db_host := "localhost"
+	db_database := "dbSapHasap"
+
+	connStr := fmt.Sprintf("%s://%s:%s@%s/%s?sslmode=disable", db_type, db_user, db_password, db_host, db_database)
+
+	db, err := sql.Open("postgres", connStr)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	query_request := "SELECT \"ResId\", \"ResName\" FROM tbl_dk_resource"
+
+	rows, err := db.Query(query_request)
+
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	defer rows.Close()
+
+	cols, _ := rows.Columns()
+
+	for rows.Next() {
+
+		values := make([]interface{}, len(cols))
+		valuePointers := make([]interface{}, len(cols))
+
+		for i := range cols {
+			valuePointers[i] = &values[i]
+		}
+
+		err := rows.Scan(valuePointers...)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		for i, col := range cols {
+
+			val := values[i]
+
+			b, ok := val.([]byte)
+			var v interface{}
+
+			if ok {
+				v = string(b)
+			} else {
+				v = val
+			}
+
+			fmt.Println(col, v)
+
+		}
+
+	}
+
+	defer db.Close()
+
+}