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package bun
import (
"context"
"database/sql"
"fmt"
"github.com/uptrace/bun/internal"
"github.com/uptrace/bun/schema"
)
type AddColumnQuery struct {
baseQuery
ifNotExists bool
}
var _ Query = (*AddColumnQuery)(nil)
func NewAddColumnQuery(db *DB) *AddColumnQuery {
q := &AddColumnQuery{
baseQuery: baseQuery{
db: db,
conn: db.DB,
},
}
return q
}
func (q *AddColumnQuery) Conn(db IConn) *AddColumnQuery {
q.setConn(db)
return q
}
func (q *AddColumnQuery) Model(model interface{}) *AddColumnQuery {
q.setModel(model)
return q
}
func (q *AddColumnQuery) Err(err error) *AddColumnQuery {
q.setErr(err)
return q
}
func (q *AddColumnQuery) Apply(fn func(*AddColumnQuery) *AddColumnQuery) *AddColumnQuery {
if fn != nil {
return fn(q)
}
return q
}
//------------------------------------------------------------------------------
func (q *AddColumnQuery) Table(tables ...string) *AddColumnQuery {
for _, table := range tables {
q.addTable(schema.UnsafeIdent(table))
}
return q
}
func (q *AddColumnQuery) TableExpr(query string, args ...interface{}) *AddColumnQuery {
q.addTable(schema.SafeQuery(query, args))
return q
}
func (q *AddColumnQuery) ModelTableExpr(query string, args ...interface{}) *AddColumnQuery {
q.modelTableName = schema.SafeQuery(query, args)
return q
}
//------------------------------------------------------------------------------
func (q *AddColumnQuery) ColumnExpr(query string, args ...interface{}) *AddColumnQuery {
q.addColumn(schema.SafeQuery(query, args))
return q
}
func (q *AddColumnQuery) IfNotExists() *AddColumnQuery {
q.ifNotExists = true
return q
}
//------------------------------------------------------------------------------
func (q *AddColumnQuery) Operation() string {
return "ADD COLUMN"
}
func (q *AddColumnQuery) AppendQuery(fmter schema.Formatter, b []byte) (_ []byte, err error) {
if q.err != nil {
return nil, q.err
}
if len(q.columns) != 1 {
return nil, fmt.Errorf("bun: AddColumnQuery requires exactly one column")
}
b = append(b, "ALTER TABLE "...)
b, err = q.appendFirstTable(fmter, b)
if err != nil {
return nil, err
}
b = append(b, " ADD "...)
if q.ifNotExists {
b = append(b, "IF NOT EXISTS "...)
}
b, err = q.columns[0].AppendQuery(fmter, b)
if err != nil {
return nil, err
}
return b, nil
}
//------------------------------------------------------------------------------
func (q *AddColumnQuery) Exec(ctx context.Context, dest ...interface{}) (sql.Result, error) {
queryBytes, err := q.AppendQuery(q.db.fmter, q.db.makeQueryBytes())
if err != nil {
return nil, err
}
query := internal.String(queryBytes)
return q.exec(ctx, q, query)
}
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