// +build go1.8

package mssql

import (
	"context"
	"fmt"
)

func (s mssql) HasIndex(tableName string, indexName string) bool {
	var count int
	s.db.QueryRowContext(context.Background(), queryMSSQLHasIndex, indexName, tableName).Scan(&count)
	return count > 0
}

func (s mssql) RemoveIndex(tableName string, indexName string) error {
	_, err := s.db.ExecContext(context.Background(), fmt.Sprintf(queryMSSQLRemoveIndex, indexName, s.Quote(tableName)))
	return err
}

func (s mssql) HasTable(tableName string) bool {
	var count int
	s.db.QueryRowContext(context.Background(), queryMSSQLHasTable, tableName, s.CurrentDatabase()).Scan(&count)
	return count > 0
}

func (s mssql) HasColumn(tableName string, columnName string) bool {
	var count int
	s.db.QueryRowContext(context.Background(), queryMSSQLHasColumn, s.CurrentDatabase(), tableName, columnName).Scan(&count)
	return count > 0
}

func (s mssql) CurrentDatabase() (name string) {
	s.db.QueryRowContext(context.Background(), queryMSSQLCurrentDatabase).Scan(&name)
	return
}