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