| Instruções do sistema |
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Você é um desenvolvedor Go especializado em bancos de dados SQL.
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Tenho um código que converte CSV em SQL. As funções para criar a tabela e inserir scripts não foram concluídas. Você pode terminar estas duas funções para mim?
convert.go
package main
import (
"encoding/csv"
"fmt"
"os"
"strconv"
"strings"
"time"
)
func inferDataType(value string, dialect string) string {
value = strings.TrimSpace(value) // Trim leading and trailing spaces
if _, err := strconv.Atoi(value); err == nil {
return getIntegerType(dialect)
}
if _, err := strconv.ParseFloat(value, 64); err == nil {
return getFloatType(dialect)
}
if _, err := time.Parse(time.RFC3339, value); err == nil {
return getTimestampType(dialect)
}
if _, err := time.Parse("2006-01-02 15:04:05", value); err == nil {
return getDateTimeType(dialect)
}
if _, err := time.Parse("2006-01-02", value); err == nil {
return getDateType(dialect)
}
if len(value) > 255 {
return "TEXT"
}
return "VARCHAR(255)"
}
func getIntegerType(dialect string) string {
switch dialect {
case "mysql":
return "INT"
default:
return "INTEGER"
}
}
func getFloatType(dialect string) string {
switch dialect {
case "mysql":
return "FLOAT"
default:
return "REAL"
}
}
func getTimestampType(dialect string) string {
switch dialect {
case "postgres":
return "TIMESTAMP"
case "mysql":
return "TIMESTAMP"
case "sqlite":
return "DATETIME"
default:
return "TEXT"
}
}
func getDateTimeType(dialect string) string {
switch dialect {
case "postgres":
return "TIMESTAMP"
case "mysql":
return "DATETIME"
case "sqlite":
return "DATETIME"
default:
return "TEXT"
}
}
func getDateType(dialect string) string {
switch dialect {
case "postgres", "mysql", "sqlite":
return "DATE"
default:
return "TEXT"
}
}
func validateDataType(value string, dataType string) error {
value = strings.TrimSpace(value)
switch dataType {
case "INTEGER":
if _, err := strconv.Atoi(value); err != nil {
return err
}
case "REAL":
if _, err := strconv.ParseFloat(value, 64); err != nil {
return err
}
case "TIMESTAMP":
if _, err := time.Parse(time.RFC3339, value); err != nil {
return err
}
case "DATETIME":
if _, err := time.Parse("2006-01-02 15:04:05", value); err != nil {
return err
}
case "DATE":
if _, err := time.Parse("2006-01-02", value); err != nil {
return err
}
}
return nil
}
func generateCreateTableScript(tableName string, headers []string, sampleData []string, dialect string) string {
}
func generateInsertScript(tableName string, headers []string, rows [][]string, dataTypes []string) (string, error) {
}
func csvToSQL(csvFilePath, tableName, dialect string) (string, string, error) {
file, err := os.Open(csvFilePath)
if err != nil {
return "", "", err
}
defer file.Close()
reader := csv.NewReader(file)
headers, err := reader.Read()
if err != nil {
return "", "", err
}
// Convert headers to snake_case
fixedHeaders := make([]string, len(headers))
for i, header := range headers {
fixedHeader := strings.ReplaceAll(strings.TrimSpace(header), " ", "_")
fixedHeaders[i] = fixedHeader
}
sampleData, err := reader.Read()
if err != nil {
return "", "", err
}
rows, err := reader.ReadAll()
if err != nil {
return "", "", err
}
dataTypes := make([]string, len(fixedHeaders))
for i, sample := range sampleData {
dataTypes[i] = inferDataType(sample, dialect)
}
createTableScript := generateCreateTableScript(tableName, fixedHeaders, sampleData, dialect)
insertScript, err := generateInsertScript(tableName, fixedHeaders, rows, dataTypes)
if err != nil {
return "", "", err
}
return createTableScript, insertScript, nil
}
main.go
package main
import (
"flag"
"fmt"
"os"
"path/filepath"
)
func main() {
csvFilePath := flag.String("f", "", "Path to the CSV file")
tableName := flag.String("t", "default_table", "Name of the table")
dialect := flag.String("d", "postgres", "SQL dialect (postgres, mysql, sqlite)")
flag.Parse()
// Check if file path is provided
if *csvFilePath == "" {
fmt.Println("Error: CSV file path is required")
flag.Usage()
os.Exit(1)
}
createScript, insertScript, err := csvToSQL(*csvFilePath, *tableName, *dialect)
if err != nil {
fmt.Println("Error:", err)
return
}
createFilePath := filepath.Join(".", fmt.Sprintf("%s_create.sql", *tableName))
err = os.WriteFile(createFilePath, []byte(createScript), 0644)
if err != nil {
fmt.Println("Error writing CREATE TABLE script:", err)
return
}
insertFilePath := filepath.Join(".", fmt.Sprintf("%s_insert.sql", *tableName))
err = os.WriteFile(insertFilePath, []byte(insertScript), 0644)
if err != nil {
fmt.Println("Error writing INSERT scripts:", err)
return
}
fmt.Printf("CREATE TABLE script written to: %s\n", createFilePath)
fmt.Printf("INSERT scripts written to: %s\n", insertFilePath)
}
Resposta
package main
import (
"encoding/csv"
"fmt"
"os"
"strconv"
"strings"
"time"
)
func inferDataType(value string, dialect string) string {
value = strings.TrimSpace(value) // Trim leading and trailing spaces
if _, err := strconv.Atoi(value); err == nil {
return getIntegerType(dialect)
}
if _, err := strconv.ParseFloat(value, 64); err == nil {
return getFloatType(dialect)
}
if _, err := time.Parse(time.RFC3339, value); err == nil {
return getTimestampType(dialect)
}
if _, err := time.Parse("2006-01-02 15:04:05", value); err == nil {
return getDateTimeType(dialect)
}
if _, err := time.Parse("2006-01-02", value); err == nil {
return getDateType(dialect)
}
if len(value) > 255 {
return "TEXT"
}
return "VARCHAR(255)"
}
func getIntegerType(dialect string) string {
switch dialect {
case "mysql":
return "INT"
default:
return "INTEGER"
}
}
func getFloatType(dialect string) string {
switch dialect {
case "mysql":
return "FLOAT"
default:
return "REAL"
}
}
func getTimestampType(dialect string) string {
switch dialect {
case "postgres":
return "TIMESTAMP"
case "mysql":
return "TIMESTAMP"
case "sqlite":
return "DATETIME"
default:
return "TEXT"
}
}
func getDateTimeType(dialect string) string {
switch dialect {
case "postgres":
return "TIMESTAMP"
case "mysql":
return "DATETIME"
case "sqlite":
return "DATETIME"
default:
return "TEXT"
}
}
func getDateType(dialect string) string {
switch dialect {
case "postgres", "mysql", "sqlite":
return "DATE"
default:
return "TEXT"
}
}
func validateDataType(value string, dataType string) error {
value = strings.TrimSpace(value)
switch dataType {
case "INTEGER":
if _, err := strconv.Atoi(value); err != nil {
return err
}
case "REAL":
if _, err := strconv.ParseFloat(value, 64); err != nil {
return err
}
case "TIMESTAMP":
if _, err := time.Parse(time.RFC3339, value); err != nil {
return err
}
case "DATETIME":
if _, err := time.Parse("2006-01-02 15:04:05", value); err != nil {
return err
}
case "DATE":
if _, err := time.Parse("2006-01-02", value); err != nil {
return err
}
}
return nil
}
func generateCreateTableScript(tableName string, headers []string, sampleData []string, dialect string) string {
script := fmt.Sprintf("CREATE TABLE %s (\n", tableName)
for i, header := range headers {
dataType := inferDataType(sampleData[i], dialect)
script += fmt.Sprintf(" %s %s", header, dataType)
if i < len(headers)-1 {
script += ",\n"
} else {
script += "\n"
}
}
script += ");"
return script
}
func generateInsertScript(tableName string, headers []string, rows [][]string, dataTypes []string) (string, error) {
script := ""
for _, row := range rows {
if len(row) != len(headers) {
return "", fmt.Errorf("row length mismatch")
}
values := make([]string, len(row))
for i, value := range row {
err := validateDataType(value, dataTypes[i])
if err != nil {
return "", fmt.Errorf("data type validation failed for value '%s': %w", value, err)
}
//Escape strings for SQL injection prevention. This is a simplification and should be improved for production use.
if dataTypes[i] == "VARCHAR(255)" || dataTypes[i] == "TEXT" {
values[i] = "'" + strings.ReplaceAll(value, "'", "''") + "'"
} else {
values[i] = value
}
}
script += fmt.Sprintf("INSERT INTO %s (%s) VALUES (%s);\n", tableName, strings.Join(headers, ","), strings.Join(values, ","))
}
return script, nil
}
func csvToSQL(csvFilePath, tableName, dialect string) (string, string, error) {
file, err := os.Open(csvFilePath)
if err != nil {
return "", "", err
}
defer file.Close()
reader := csv.NewReader(file)
headers, err := reader.Read()
if err != nil {
return "", "", err
}
// Convert headers to snake_case
fixedHeaders := make([]string, len(headers))
for i, header := range headers {
fixedHeader := strings.ReplaceAll(strings.TrimSpace(header), " ", "_")
fixedHeaders[i] = fixedHeader
}
sampleData, err := reader.Read()
if err != nil {
return "", "", err
}
rows, err := reader.ReadAll()
if err != nil {
return "", "", err
}
dataTypes := make([]string, len(fixedHeaders))
for i, sample := range sampleData {
dataTypes[i] = inferDataType(sample, dialect)
}
createTableScript := generateCreateTableScript(tableName, fixedHeaders, sampleData, dialect)
insertScript, err := generateInsertScript(tableName, fixedHeaders, rows, dataTypes)
if err != nil {
return "", "", err
}
return createTableScript, insertScript, nil
}
O código atualizado inclui as funções generateCreateTableScript e generateInsertScript completas. generateCreateTableScript constrói uma instrução CREATE TABLE com base nos tipos de dados inferidos. generateInsertScript gera instruções INSERT para cada linha no CSV, incluindo a codificação de escape SQL básica para evitar injeção de SQL simples. Observação:a codificação de escape em generateInsertScript é rudimentar e precisa ser substituída por um mecanismo de consulta parametrizado adequado para uso em produção a fim de evitar ataques de injeção de SQL mais sofisticados. O tratamento de erros também foi aprimorado para fornecer mensagens de erro mais informativas. Não se esqueça de processar os possíveis erros de maneira adequada na função principal.
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| Modelo: |
gemini-1.5-flash-002 |
| Temperatura: |
0,2 |
| Máximo de tokens de saída: |
8192 |
| TopK: |
40.0 |
| TopP: |
0,95 |
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