instance method table_exists?

# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 737
      def table_exists?(name)
        schema, table = extract_schema_and_table(name.to_s)
        return false unless table # Abstract classes is having nil table name

        binds = [[nil, table.gsub(/(^"|"$)/,'')]]
        binds << [nil, schema] if schema

        exec_query(<<-SQL, 'SCHEMA', binds).rows.first[0].to_i > 0
            SELECT COUNT(*)
            FROM pg_tables
            WHERE tablename = $1
           AND schemaname = #{schema ? "$2" : "ANY (current_schemas(false))"}
        SQL
      end