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sqlshell.go
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sqlshell.go
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// Copyright 2024 Moran. All rights reserved.
// Use of this source code is governed by a MIT style
// license that can be found in the LICENSE file.
package sqlitecmd
import (
"database/sql"
"os"
"strings"
"sync/atomic"
"syscall"
"github.com/sszqdz/bayes-dmcli/internal/pkg/uuitable"
"github.com/c-bata/go-prompt"
"github.com/gosuri/uitable"
"github.com/spf13/cobra"
)
var (
cmd *cobra.Command
db *sql.DB
isMultiLine atomic.Bool
sqlBuilder strings.Builder
suggests []prompt.Suggest
)
func init() {
suggests = make([]prompt.Suggest, 0, len(sqlKeywords)+len(sqliteKeywords))
for _, word := range sqlKeywords {
suggests = append(suggests, prompt.Suggest{Text: word})
}
for _, word := range sqliteKeywords {
suggests = append(suggests, prompt.Suggest{Text: word})
}
}
func sqlShell(c *cobra.Command, sqliteDB *sql.DB) {
cmd = c
db = sqliteDB
pt := prompt.New(
executor,
completer,
prompt.OptionPrefix("> "),
prompt.OptionPrefixTextColor(prompt.DefaultColor),
prompt.OptionSwitchKeyBindMode(prompt.EmacsKeyBind),
prompt.OptionMaxSuggestion(10),
prompt.OptionCompletionOnDown(),
// prompt.OptionShowCompletionAtStart(),
prompt.OptionLivePrefix(multiLinePrefix),
prompt.OptionAddKeyBind(prompt.KeyBind{
Key: prompt.ControlC,
Fn: func(buf *prompt.Buffer) {
if err := syscall.Kill(os.Getpid(), syscall.SIGINT); err != nil {
os.Exit(1)
}
},
}),
prompt.OptionSetExitCheckerOnInput(func(in string, breakline bool) bool {
if breakline {
return false
}
in = strings.TrimSpace(in)
if !strings.HasSuffix(in, ";") {
return false
}
return strings.TrimSpace(sqlBuilder.String())+in == "exit;"
}),
// prompt.OptionOnExitCallback(),
)
pt.Run()
}
func executor(in string) {
in = strings.TrimSpace(in)
if len(in) == 0 {
return
}
if sqlBuilder.Len() > 0 {
sqlBuilder.WriteByte(' ')
}
// determine multi-line
if !strings.HasSuffix(in, ";") {
if beforeStr, backslashFound := strings.CutSuffix(in, `\`); backslashFound {
in = beforeStr
}
sqlBuilder.WriteString(in)
isMultiLine.Store(true)
return
}
// end line
sqlBuilder.WriteString(in)
isMultiLine.Store(false)
sqlStr := sqlBuilder.String()
sqlBuilder.Reset()
if len(sqlStr) == 0 {
return
}
for _, si := range splitSql(sqlStr) {
if si.IsQuery {
cmd.Println("QUERY :" + si.SQL)
cmd.Println("________DATA________")
query(si.SQL)
} else {
cmd.Println("EXEC: " + si.SQL)
cmd.Println("________RESULT________")
exec(si.SQL)
}
cmd.Println()
}
}
func query(sqlStr string) {
rows, err := db.Query(sqlStr)
if err != nil {
cmd.PrintErrln(err)
return
}
defer rows.Close()
columns, err := rows.Columns()
if err != nil {
cmd.PrintErrln(err)
return
}
if len(columns) == 0 {
return
}
columnSlice := make([]any, len(columns))
for i, column := range columns {
columnSlice[i] = column
}
tb := newTable(50)
uuitable.AddHeader(tb, columnSlice...)
hasData := false
values := make([]any, len(columns))
valuePtrs := make([]any, len(columns))
for i := range columns {
valuePtrs[i] = &values[i]
}
for rows.Next() {
err := rows.Scan(valuePtrs...)
if err != nil {
cmd.PrintErrln(err)
return
}
hasData = true
data := make([]interface{}, 0, len(columns))
for i := range columns {
var v interface{} = values[i]
data = append(data, v)
}
tb.AddRow(data...)
}
cmd.Println(tb)
if !hasData {
cmd.Println("__NO__DATA__")
}
if err := rows.Err(); err != nil {
cmd.PrintErrln(err)
return
}
}
func exec(sqlStr string) {
result, err := db.Exec(sqlStr)
if err != nil {
cmd.PrintErrln(err)
return
}
lastInsertId, err := result.LastInsertId()
if err != nil {
cmd.PrintErrln(err)
}
rowsAffected, err := result.RowsAffected()
if err != nil {
cmd.PrintErrln(err)
}
tb := newTable(50)
uuitable.AddHeader(tb, "lastInsertId", "rowsAffected")
tb.AddRow(lastInsertId, rowsAffected)
cmd.Println(tb)
}
func multiLinePrefix() (prefix string, useLivePrefix bool) {
if isMultiLine.Load() {
return " » ", true
}
return "", false
}
func completer(d prompt.Document) []prompt.Suggest {
return prompt.FilterHasPrefix(suggests, d.GetWordBeforeCursor(), true)
}
func newTable(maxColWidth uint, wrap ...bool) *uitable.Table {
tb := uitable.New()
tb.Separator = " "
tb.MaxColWidth = maxColWidth
tb.Wrap = true
if len(wrap) == 1 {
tb.Wrap = wrap[0]
}
return tb
}