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delete.go
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delete.go
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package geq
import (
"context"
"database/sql"
)
type DeleteQuery struct {
table AnyTable
wheres []Expr
}
func newDeleteQuery(table AnyTable) *DeleteQuery {
return &DeleteQuery{table: table, wheres: nil}
}
func (q *DeleteQuery) Where(exprs ...Expr) *DeleteQuery {
q.wheres = append(q.wheres, exprs...)
return q
}
func (q *DeleteQuery) Build() (bq *BuiltQuery, err error) {
cfg := &QueryConfig{dialect: defaultDialect}
return q.BuildWith(cfg)
}
func (q *DeleteQuery) BuildWith(cfg *QueryConfig) (bq *BuiltQuery, err error) {
w := newQueryWriter()
w.Write("DELETE FROM ")
w.Write(cfg.dialect.Ident(q.table.getTableName()))
if len(q.wheres) > 0 {
w.Write(" WHERE ")
andAll(q.wheres...).appendExpr(w, cfg)
}
return &BuiltQuery{Query: w.String(), Args: w.Args}, nil
}
func (q *DeleteQuery) Exec(ctx context.Context, db QueryExecutor) (result sql.Result, err error) {
bq, err := q.Build()
if err != nil {
return nil, err
}
return db.ExecContext(ctx, bq.Query, bq.Args...)
}