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How to use handleRows method of sql Package

Best Venom code snippet using sql.handleRows

learnsqlite.go

Source:learnsqlite.go

1package main2import (3	"database/sql"4	"fmt"5	"log"6	_ "github.com/mattn/go-sqlite3"7)8type animal struct {9	id         int10	animalType string11	nickname   string12	zone       int13	age        int14}15func main() {16	log.Println("Connect to database...")17	//connect to the database18	db, err := sql.Open("sqlite3", "dino.db")19	if err != nil {20		log.Fatal(err)21	}22	defer db.Close()23	err = createdatabase(db)24	if err != nil {25		log.Fatal(err)26	}27	err = insertsampledata(db)28	if err != nil {29		log.Fatal(err)30	}31	//general query with arguments32	rows, err := db.Query("select * from animals where age > $1", 5) //both $ and ? are supported33	handlerows(rows, err)34	//query a single row35	row := db.QueryRow("select * from animals where age > $1", 5)36	a := animal{}37	err = row.Scan(&a.id, &a.animalType, &a.nickname, &a.zone, &a.age)38	if err != nil {39		log.Fatal(err)40	}41	fmt.Println(a)42	/*43			//insert a row44			result, err := db.Exec("Insert into animals (animal_type,nickname,zone,age) values ('Carnotaurus', 'Carno', $1, $2)", 3, 22)45			if err != nil {46				log.Fatal(err)47			}48			fmt.Println(result.LastInsertId())49			fmt.Println(result.RowsAffected())50		//update a row51		res, err := db.Exec("Update animals set age = $1 where id = $2", 16, 2)52		if err != nil {53			log.Fatal(err)54		}55		fmt.Println(res.LastInsertId())56		fmt.Println(res.RowsAffected())57	*/58	/*59		var id int60		db.QueryRow("Update animals set age = $1 where id = $2 returning id", 16, 2).Scan(&id)61		fmt.Println("id returned:", id)62	*/63	/*64		//prepare queries to use them multiple times, this also improves performance because65		fmt.Println("Prepared statements... ")66		stmt, err := db.Prepare(" select * from animals where age > $1 ")67		if err != nil {68			log.Fatal(err)69		}70		defer stmt.Close()71		//let's try with age>572		rows, err = stmt.Query(5)73		handlerows(rows, err)74		//let's try with age>1075		rows, err = stmt.Query(10)76		handlerows(rows, err)77		testTransaction(db)78	*/79}80func handlerows(rows *sql.Rows, err error) {81	if err != nil {82		log.Fatal(err)83	}84	defer rows.Close()85	animals := []animal{}86	for rows.Next() {87		a := animal{}88		err := rows.Scan(&a.id, &a.animalType, &a.nickname, &a.zone, &a.age)89		if err != nil {90			log.Println(err)91			continue92		}93		animals = append(animals, a)94	}95	if err := rows.Err(); err != nil {96		log.Fatal(err)97	}98	fmt.Println(animals)99}100func testTransaction(db *sql.DB) {101	fmt.Println("Transactions...")102	tx, err := db.Begin()103	if err != nil {104		log.Fatal(err)105	}106	defer tx.Rollback()107	stmt, err := tx.Prepare("select * from animals where age > $1")108	if err != nil {109		log.Fatal(err)110	}111	defer stmt.Close()112	rows, err := stmt.Query(15)113	handlerows(rows, err)114	rows, err = stmt.Query(16)115	handlerows(rows, err)116	results, err := tx.Exec("Update animals set age = $1 where id = $2", 17, 2)117	if err != nil {118		log.Fatal(err)119	}120	fmt.Println(results.RowsAffected())121	err = tx.Commit()122	if err != nil {123		log.Fatal(err)124	}125}126func createdatabase(db *sql.DB) error {127	_, err := db.Exec(`CREATE TABLE IF NOT EXISTS128						animals(id INTEGER PRIMARY KEY AUTOINCREMENT, 129                        animal_type TEXT,130                        nickname TEXT,131                        zone INTEGER, 132                        age INTEGER) `)133	return err134}135func insertsampledata(db *sql.DB) error {136	_, err := db.Exec(`insert INTO animals (animal_type,nickname,zone,age) 137                        VALUES ('Tyrannosaurus rex','rex', 1, 10),138                        ('Velociraptor', 'rapto', 2, 15)`)139	return err140}...

learnpostgresql.go

Source:learnpostgresql.go

1package main2import (3	"database/sql"4	"fmt"5	"log"6	_ "github.com/lib/pq"7)8type animal struct {9	id         int10	animalType string11	nickname   string12	zone       int13	age        int14}15func main() {16	//connect to the database17	db, err := sql.Open("postgres", "user=postgres dbname=dino sslmode=disable")18	if err != nil {19		log.Fatal(err)20	}21	defer db.Close()22	//general query with arguments23	rows, err := db.Query("select * from animals where age > $1", 5) //$ instead of ?24	handlerows(rows, err)25	//query a single row26	row := db.QueryRow("select * from animals where age > $1", 5)27	a := animal{}28	err = row.Scan(&a.id, &a.animalType, &a.nickname, &a.zone, &a.age)29	if err != nil {30		log.Fatal(err)31	}32	fmt.Println(a)33	/***34	//insert a row35	result, err := db.Exec("Insert into animals (animal_type,nickname,zone,age) values ('Carnotaurus', 'Carno', $1, $2)", 3, 22)36	if err != nil {37		log.Fatal(err)38	}39	fmt.Println(result.LastInsertId()) //not supported here40	fmt.Println(result.RowsAffected())41	*/42	/*43		//update a row44		res, err := db.Exec("Update animals set age = $1 where id = $2", 16, 2)45		if err != nil {46			log.Fatal(err)47		}48		fmt.Println(res.LastInsertId()) //not supported here49		fmt.Println(res.RowsAffected())50	*/51	/*52		var id int53		db.QueryRow("Update animals set age = $1 where id = $2 returning id", 16, 2).Scan(&id)54		fmt.Println("id returned:", id)55	*/56	//prepare queries to use them multiple times, this also improves performance because57	fmt.Println("Prepared statements... ")58	stmt, err := db.Prepare(" select * from animals where age > $1 ")59	if err != nil {60		log.Fatal(err)61	}62	defer stmt.Close()63	//let's try with age>564	rows, err = stmt.Query(5)65	handlerows(rows, err)66	//let's try with age>1067	rows, err = stmt.Query(10)68	handlerows(rows, err)69	testTransaction(db)70}71func handlerows(rows *sql.Rows, err error) {72	if err != nil {73		log.Fatal(err)74	}75	defer rows.Close()76	animals := []animal{}77	for rows.Next() {78		a := animal{}79		err := rows.Scan(&a.id, &a.animalType, &a.nickname, &a.zone, &a.age)80		if err != nil {81			log.Println(err)82			continue83		}84		animals = append(animals, a)85	}86	if err := rows.Err(); err != nil {87		log.Fatal(err)88	}89	fmt.Println(animals)90}91func testTransaction(db *sql.DB) {92	fmt.Println("Transactions...")93	tx, err := db.Begin()94	if err != nil {95		log.Fatal(err)96	}97	defer tx.Rollback()98	stmt, err := tx.Prepare("select * from animals where age > $1")99	if err != nil {100		log.Fatal(err)101	}102	defer stmt.Close()103	rows, err := stmt.Query(15)104	handlerows(rows, err)105	rows, err = stmt.Query(17)106	handlerows(rows, err)107	results, err := tx.Exec("Update animals set age = $1 where id = $2", 18, 2)108	if err != nil {109		log.Fatal(err)110	}111	fmt.Println(results.RowsAffected())112	err = tx.Commit()113	if err != nil {114		log.Fatal(err)115	}116}...

handleRows

Using AI Code Generation

1import (2func main() {3	db, err := sql.Open("mysql", "root:root@/test")4	if err != nil {5		panic(err.Error())6	}7	defer db.Close()8	rows, err := db.Query("SELECT * FROM users")9	if err != nil {10		panic(err.Error())11	}12	for rows.Next() {13		err = rows.Scan(&id, &name)14		if err != nil {15			panic(err.Error())16		}17		fmt.Println(id, name)18	}19}20import (21func main() {22	db, err := sql.Open("mysql", "root:root@/test")23	if err != nil {24		panic(err.Error())25	}26	defer db.Close()27	rows, err := db.Query("SELECT * FROM users")28	if err != nil {29		panic(err.Error())30	}31	columns, err := rows.Columns()32	if err != nil {33		panic(err.Error())34	}35	fmt.Println(columns)36	values := make([]sql.RawBytes, len(columns))37	scanArgs := make([]interface{}, len(values))38	for i := range values {39	}40	for rows.Next() {41		err = rows.Scan(scanArgs...)42		if err != nil {43			panic(err.Error())44		}45		for i, col := range values {46			if col == nil {47			} else {

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