if !selectAST.Expression.All &&
		len(selectAST.Expression.Expressions) == 1 &&
		len(selectAST.Expression.Expressions[0].Expression.And) == 1 &&
		len(selectAST.Expression.Expressions[0].Expression.And[0].Condition) == 1 &&
		selectAST.Expression.Expressions[0].Expression.And[0].Condition[0].Operand != nil &&
		selectAST.Expression.Expressions[0].Expression.And[0].Condition[0].Operand.Operand.Left != nil &&

	strippedTableAlias string
	strippedPathExpr   []*JSONPathElement
}

// AliasedExpression is an expression that can be optionally named
type AliasedExpression struct {
	Expression *Expression `parser:"@@"`
	As         string      `parser:"[ \"AS\" @Ident | \"AS\" @LitString ]"`
}

// Grammar for Expression
//
// Expression          → AndCondition ("OR" AndCondition)*
// AndCondition        → Condition ("AND" Condition)*

		message:    "Did not find the expected identifier for AT name in the SQL expression.",
		statusCode: 400,
		cause:      err,
	}
}

func errParseCannotMixSqbAndWildcardInSelectList(err error) *s3Error {
	return &s3Error{
		code:       "ParseCannotMixSqbAndWildcardInSelectList",
		message:    "Cannot mix [] and * in the same expression in a SELECT list in SQL expression.",
		statusCode: 400,
		cause:      err,
	}
}

	if e.All {
		return qProp{isRowFunc: true}
	}

	for _, ex := range e.Expressions {
		result.combine(ex.analyze(s))
	}
	return
}

func (e *AliasedExpression) analyze(s *Select) qProp {
	return e.Expression.analyze(s)
}

func (e *Expression) analyze(s *Select) (result qProp) {
	for _, ac := range e.And {
		result.combine(ac.analyze(s))
	}
	return
}

}

func (err *s3Error) Error() string {
	return err.message
}

func errInvalidDataType(err error) *s3Error {
	return &s3Error{
		code:       "InvalidDataType",
		message:    "The SQL expression contains an invalid data type.",
		statusCode: 400,
		cause:      err,
	}
}

func errIncorrectSQLFunctionArgumentType(err error) *s3Error {
	return &s3Error{
		code:       "IncorrectSqlFunctionArgumentType",

  rules:
    - type: object  # regular objects with zero or more older versions
      name: NAME # match object names that satisfy the wildcard expression.
      olderThan: 70h # match objects older than this value
      createdBefore: "2006-01-02T15:04:05.00Z" # match objects created before "date"
      tags:
        - key: name

func (w *nullResponseWriter) Flush() {
}

func benchmarkSelect(b *testing.B, count int, query string) {
	requestXML := []byte(`
<?xml version="1.0" encoding="UTF-8"?>
<SelectObjectContentRequest>
    <Expression>` + query + `</Expression>
    <ExpressionType>SQL</ExpressionType>
    <InputSerialization>
        <CompressionType>NONE</CompressionType>
        <CSV>
            <FileHeaderInfo>USE</FileHeaderInfo>
        </CSV>

### 3. Example

As an example, let us take a gzip compressed CSV file. Without S3 Select, we would need to download, decompress and process the entire CSV to get the data you needed. With Select API, can use a simple SQL expression to return only the data from the CSV you’re interested in, instead of retrieving the entire object. Following Python example shows how to retrieve the first column `Location` from an object containing data in CSV format.

	default:
		err = errInvalidAggregation
	}

	return err
}

func (e *AliasedExpression) aggregateRow(r Record, tableAlias string) error {
	return e.Expression.aggregateRow(r, tableAlias)
}

func (e *Expression) aggregateRow(r Record, tableAlias string) error {
	for _, ex := range e.And {
		err := ex.aggregateRow(r, tableAlias)
		if err != nil {
			return err
		}
	}
	return nil

// processed, and the `getAggregate` function is called.

func (e *AliasedExpression) evalNode(r Record, tableAlias string) (*Value, error) {
	return e.Expression.evalNode(r, tableAlias)
}

func (e *Expression) evalNode(r Record, tableAlias string) (*Value, error) {
	if len(e.And) == 1 {
		// In this case, result is not required to be boolean
		// type.
		return e.And[0].evalNode(r, tableAlias)
	}