/
query.go
74 lines (65 loc) · 1.36 KB
/
query.go
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package sqlitex
import (
"errors"
"crawshaw.io/sqlite"
)
var errNoResults = errors.New("sqlite: statement has no results")
var errMultipleResults = errors.New("sqlite: statement has multiple result rows")
func resultSetup(stmt *sqlite.Stmt) error {
hasRow, err := stmt.Step()
if err != nil {
stmt.Reset()
return err
}
if !hasRow {
stmt.Reset()
return errNoResults
}
return nil
}
func resultTeardown(stmt *sqlite.Stmt) error {
hasRow, err := stmt.Step()
if err != nil {
stmt.Reset()
return err
}
if hasRow {
stmt.Reset()
return errMultipleResults
}
return stmt.Reset()
}
func ResultInt(stmt *sqlite.Stmt) (int, error) {
res, err := ResultInt64(stmt)
return int(res), err
}
func ResultInt64(stmt *sqlite.Stmt) (int64, error) {
if err := resultSetup(stmt); err != nil {
return 0, err
}
res := stmt.ColumnInt64(0)
if err := resultTeardown(stmt); err != nil {
return 0, err
}
return res, nil
}
func ResultText(stmt *sqlite.Stmt) (string, error) {
if err := resultSetup(stmt); err != nil {
return "", err
}
res := stmt.ColumnText(0)
if err := resultTeardown(stmt); err != nil {
return "", err
}
return res, nil
}
func ResultFloat(stmt *sqlite.Stmt) (float64, error) {
if err := resultSetup(stmt); err != nil {
return 0, err
}
res := stmt.ColumnFloat(0)
if err := resultTeardown(stmt); err != nil {
return 0, err
}
return res, nil
}