forked from mystiq/dex
73 lines
2.4 KiB
Go
73 lines
2.4 KiB
Go
/*
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Package translate implements translation of driver specific SQL queries.
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*/
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package translate
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import (
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"database/sql"
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"regexp"
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"github.com/go-gorp/gorp"
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)
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var (
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bindRegexp = regexp.MustCompile(`\$\d+`)
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trueRegexp = regexp.MustCompile(`\btrue\b`)
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)
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// PostgresToSQLite translates github.com/lib/pq flavored SQL quries to github.com/mattn/go-sqlite3's flavor.
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//
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// It assumes that possitional bind arguements ($1, $2, etc.) are unqiue and in sequential order.
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func PostgresToSQLite(query string) string {
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query = bindRegexp.ReplaceAllString(query, "?")
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query = trueRegexp.ReplaceAllString(query, "1")
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return query
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}
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// NewTranslatingExecutor returns an executor wrapping the existing executor. All query strings passed to
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// the executor will be run through the translate function before begin passed to the driver.
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func NewTranslatingExecutor(exec gorp.SqlExecutor, translate func(string) string) gorp.SqlExecutor {
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return &executor{exec, translate}
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}
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type executor struct {
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gorp.SqlExecutor
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Translate func(string) string
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}
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func (e *executor) Exec(query string, args ...interface{}) (sql.Result, error) {
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return e.SqlExecutor.Exec(e.Translate(query), args...)
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}
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func (e *executor) Select(i interface{}, query string, args ...interface{}) ([]interface{}, error) {
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return e.SqlExecutor.Select(i, e.Translate(query), args...)
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}
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func (e *executor) SelectInt(query string, args ...interface{}) (int64, error) {
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return e.SqlExecutor.SelectInt(e.Translate(query), args...)
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}
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func (e *executor) SelectNullInt(query string, args ...interface{}) (sql.NullInt64, error) {
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return e.SqlExecutor.SelectNullInt(e.Translate(query), args...)
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}
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func (e *executor) SelectFloat(query string, args ...interface{}) (float64, error) {
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return e.SqlExecutor.SelectFloat(e.Translate(query), args...)
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}
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func (e *executor) SelectNullFloat(query string, args ...interface{}) (sql.NullFloat64, error) {
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return e.SqlExecutor.SelectNullFloat(e.Translate(query), args...)
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}
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func (e *executor) SelectStr(query string, args ...interface{}) (string, error) {
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return e.SqlExecutor.SelectStr(e.Translate(query), args...)
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}
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func (e *executor) SelectNullStr(query string, args ...interface{}) (sql.NullString, error) {
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return e.SqlExecutor.SelectNullStr(e.Translate(query), args...)
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}
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func (e *executor) SelectOne(holder interface{}, query string, args ...interface{}) error {
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return e.SqlExecutor.SelectOne(holder, e.Translate(query), args...)
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}
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