@Generated(value="com.amazonaws:aws-java-sdk-code-generator") public class Condition extends Object implements Serializable, Cloneable, StructuredPojo
Represents the selection criteria for a Query or Scan operation:
For a Query operation, Condition is used for specifying the KeyConditions to
use when querying a table or an index. For KeyConditions, only the following comparison operators are
supported:
EQ | LE | LT | GE | GT | BEGINS_WITH | BETWEEN
Condition is also used in a QueryFilter, which evaluates the query results and returns only
the desired values.
For a Scan operation, Condition is used in a ScanFilter, which evaluates the
scan results and returns only the desired values.
| Constructor and Description |
|---|
Condition() |
| Modifier and Type | Method and Description |
|---|---|
Condition |
clone() |
boolean |
equals(Object obj) |
List<AttributeValue> |
getAttributeValueList()
One or more values to evaluate against the supplied attribute.
|
String |
getComparisonOperator()
A comparator for evaluating attributes.
|
int |
hashCode() |
void |
marshall(ProtocolMarshaller protocolMarshaller)
Marshalls this structured data using the given
ProtocolMarshaller. |
void |
setAttributeValueList(Collection<AttributeValue> attributeValueList)
One or more values to evaluate against the supplied attribute.
|
void |
setComparisonOperator(ComparisonOperator comparisonOperator)
A comparator for evaluating attributes.
|
void |
setComparisonOperator(String comparisonOperator)
A comparator for evaluating attributes.
|
String |
toString()
Returns a string representation of this object.
|
Condition |
withAttributeValueList(AttributeValue... attributeValueList)
One or more values to evaluate against the supplied attribute.
|
Condition |
withAttributeValueList(Collection<AttributeValue> attributeValueList)
One or more values to evaluate against the supplied attribute.
|
Condition |
withComparisonOperator(ComparisonOperator comparisonOperator)
A comparator for evaluating attributes.
|
Condition |
withComparisonOperator(String comparisonOperator)
A comparator for evaluating attributes.
|
public List<AttributeValue> getAttributeValueList()
One or more values to evaluate against the supplied attribute. The number of values in the list depends on the
ComparisonOperator being used.
For type Number, value comparisons are numeric.
String value comparisons for greater than, equals, or less than are based on ASCII character code values. For
example, a is greater than A, and a is greater than B. For a
list of code values, see http://en.wikipedia
.org/wiki/ASCII#ASCII_printable_characters.
For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
ComparisonOperator being used.
For type Number, value comparisons are numeric.
String value comparisons for greater than, equals, or less than are based on ASCII character code values.
For example, a is greater than A, and a is greater than
B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters.
For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
public void setAttributeValueList(Collection<AttributeValue> attributeValueList)
One or more values to evaluate against the supplied attribute. The number of values in the list depends on the
ComparisonOperator being used.
For type Number, value comparisons are numeric.
String value comparisons for greater than, equals, or less than are based on ASCII character code values. For
example, a is greater than A, and a is greater than B. For a
list of code values, see http://en.wikipedia
.org/wiki/ASCII#ASCII_printable_characters.
For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
attributeValueList - One or more values to evaluate against the supplied attribute. The number of values in the list depends on
the ComparisonOperator being used.
For type Number, value comparisons are numeric.
String value comparisons for greater than, equals, or less than are based on ASCII character code values.
For example, a is greater than A, and a is greater than
B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters.
For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
public Condition withAttributeValueList(AttributeValue... attributeValueList)
One or more values to evaluate against the supplied attribute. The number of values in the list depends on the
ComparisonOperator being used.
For type Number, value comparisons are numeric.
String value comparisons for greater than, equals, or less than are based on ASCII character code values. For
example, a is greater than A, and a is greater than B. For a
list of code values, see http://en.wikipedia
.org/wiki/ASCII#ASCII_printable_characters.
For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
NOTE: This method appends the values to the existing list (if any). Use
setAttributeValueList(java.util.Collection) or withAttributeValueList(java.util.Collection) if
you want to override the existing values.
attributeValueList - One or more values to evaluate against the supplied attribute. The number of values in the list depends on
the ComparisonOperator being used.
For type Number, value comparisons are numeric.
String value comparisons for greater than, equals, or less than are based on ASCII character code values.
For example, a is greater than A, and a is greater than
B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters.
For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
public Condition withAttributeValueList(Collection<AttributeValue> attributeValueList)
One or more values to evaluate against the supplied attribute. The number of values in the list depends on the
ComparisonOperator being used.
For type Number, value comparisons are numeric.
String value comparisons for greater than, equals, or less than are based on ASCII character code values. For
example, a is greater than A, and a is greater than B. For a
list of code values, see http://en.wikipedia
.org/wiki/ASCII#ASCII_printable_characters.
For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
attributeValueList - One or more values to evaluate against the supplied attribute. The number of values in the list depends on
the ComparisonOperator being used.
For type Number, value comparisons are numeric.
String value comparisons for greater than, equals, or less than are based on ASCII character code values.
For example, a is greater than A, and a is greater than
B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters.
For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
public void setComparisonOperator(String comparisonOperator)
A comparator for evaluating attributes. For example, equals, greater than, less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue element of type String, Number,
Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
{"NS":["6", "2", "1"]}.
NE : Not equal. NE is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue of type String, Number, Binary,
String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a different type
than the one provided in the request, the value does not match. For example, {"S":"6"} does not
equal {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
LE : Less than or equal.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type than
the one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
LT : Less than.
AttributeValueList can contain only one AttributeValue of type String, Number, or
Binary (not a set type). If an item contains an AttributeValue element of a different type than the
one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
GE : Greater than or equal.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type than
the one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
GT : Greater than.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type than
the one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
NOT_NULL : The attribute exists. NOT_NULL is supported for all data types, including
lists and maps.
This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
a" is null, and you evaluate it using NOT_NULL, the result is a Boolean
true. This result is because the attribute "a" exists; its data type is not relevant to
the NOT_NULL comparison operator.
NULL : The attribute does not exist. NULL is supported for all data types, including
lists and maps.
This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute "
a" is null, and you evaluate it using NULL, the result is a Boolean false.
This is because the attribute "a" exists; its data type is not relevant to the NULL
comparison operator.
CONTAINS : Checks for a subsequence, or value in a set.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If the target attribute of the comparison is of type String, then the operator checks
for a substring match. If the target attribute of the comparison is of type Binary, then the operator looks for a
subsequence of the target that matches the input. If the target attribute of the comparison is a set ("
SS", "NS", or "BS"), then the operator evaluates to true if it finds an
exact match with any member of the set.
CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If the target attribute of the comparison is a String, then the operator checks for
the absence of a substring match. If the target attribute of the comparison is Binary, then the operator checks
for the absence of a subsequence of the target that matches the input. If the target attribute of the comparison
is a set ("SS", "NS", or "BS"), then the operator evaluates to true if it
does not find an exact match with any member of the set.
NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
BEGINS_WITH : Checks for a prefix.
AttributeValueList can contain only one AttributeValue of type String or Binary (not a
Number or a set type). The target attribute of the comparison must be of type String or Binary (not a Number or a
set type).
IN : Checks for matching elements in a list.
AttributeValueList can contain one or more AttributeValue elements of type String,
Number, or Binary. These attributes are compared against an existing attribute of an item. If any elements of the
input are equal to the item attribute, the expression evaluates to true.
BETWEEN : Greater than or equal to the first value, and less than or equal to the second value.
AttributeValueList must contain two AttributeValue elements of the same type, either
String, Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or
equal to, the first element and less than, or equal to, the second element. If an item contains an
AttributeValue element of a different type than the one provided in the request, the value does not
match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
{"N":"6"} does not compare to {"NS":["6", "2", "1"]}
For usage examples of AttributeValueList and ComparisonOperator, see Legacy
Conditional Parameters in the Amazon DynamoDB Developer Guide.
comparisonOperator - A comparator for evaluating attributes. For example, equals, greater than, less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue element of type String,
Number, Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue
element of a different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
{"NS":["6", "2", "1"]}.
NE : Not equal. NE is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue of type String, Number,
Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
{"NS":["6", "2", "1"]}.
LE : Less than or equal.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not
compare to {"NS":["6", "2", "1"]}.
LT : Less than.
AttributeValueList can contain only one AttributeValue of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type
than the one provided in the request, the value does not match. For example, {"S":"6"} does
not equal {"N":"6"}. Also, {"N":"6"} does not compare to
{"NS":["6", "2", "1"]}.
GE : Greater than or equal.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not
compare to {"NS":["6", "2", "1"]}.
GT : Greater than.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not
compare to {"NS":["6", "2", "1"]}.
NOT_NULL : The attribute exists. NOT_NULL is supported for all data types,
including lists and maps.
This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
a" is null, and you evaluate it using NOT_NULL, the result is a Boolean
true. This result is because the attribute "a" exists; its data type is not
relevant to the NOT_NULL comparison operator.
NULL : The attribute does not exist. NULL is supported for all data types,
including lists and maps.
This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute
"a" is null, and you evaluate it using NULL, the result is a Boolean
false. This is because the attribute "a" exists; its data type is not relevant
to the NULL comparison operator.
CONTAINS : Checks for a subsequence, or value in a set.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If the target attribute of the comparison is of type String, then the
operator checks for a substring match. If the target attribute of the comparison is of type Binary, then
the operator looks for a subsequence of the target that matches the input. If the target attribute of the
comparison is a set ("SS", "NS", or "BS"), then the operator
evaluates to true if it finds an exact match with any member of the set.
CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If the target attribute of the comparison is a String, then the
operator checks for the absence of a substring match. If the target attribute of the comparison is Binary,
then the operator checks for the absence of a subsequence of the target that matches the input. If the
target attribute of the comparison is a set ("SS", "NS", or "BS"),
then the operator evaluates to true if it does not find an exact match with any member of the set.
NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
BEGINS_WITH : Checks for a prefix.
AttributeValueList can contain only one AttributeValue of type String or Binary
(not a Number or a set type). The target attribute of the comparison must be of type String or Binary (not
a Number or a set type).
IN : Checks for matching elements in a list.
AttributeValueList can contain one or more AttributeValue elements of type
String, Number, or Binary. These attributes are compared against an existing attribute of an item. If any
elements of the input are equal to the item attribute, the expression evaluates to true.
BETWEEN : Greater than or equal to the first value, and less than or equal to the second
value.
AttributeValueList must contain two AttributeValue elements of the same type,
either String, Number, or Binary (not a set type). A target attribute matches if the target value is
greater than, or equal to, the first element and less than, or equal to, the second element. If an item
contains an AttributeValue element of a different type than the one provided in the request,
the value does not match. For example, {"S":"6"} does not compare to {"N":"6"}.
Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
For usage examples of AttributeValueList and ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB Developer Guide.
ComparisonOperatorpublic String getComparisonOperator()
A comparator for evaluating attributes. For example, equals, greater than, less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue element of type String, Number,
Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
{"NS":["6", "2", "1"]}.
NE : Not equal. NE is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue of type String, Number, Binary,
String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a different type
than the one provided in the request, the value does not match. For example, {"S":"6"} does not
equal {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
LE : Less than or equal.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type than
the one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
LT : Less than.
AttributeValueList can contain only one AttributeValue of type String, Number, or
Binary (not a set type). If an item contains an AttributeValue element of a different type than the
one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
GE : Greater than or equal.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type than
the one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
GT : Greater than.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type than
the one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
NOT_NULL : The attribute exists. NOT_NULL is supported for all data types, including
lists and maps.
This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
a" is null, and you evaluate it using NOT_NULL, the result is a Boolean
true. This result is because the attribute "a" exists; its data type is not relevant to
the NOT_NULL comparison operator.
NULL : The attribute does not exist. NULL is supported for all data types, including
lists and maps.
This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute "
a" is null, and you evaluate it using NULL, the result is a Boolean false.
This is because the attribute "a" exists; its data type is not relevant to the NULL
comparison operator.
CONTAINS : Checks for a subsequence, or value in a set.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If the target attribute of the comparison is of type String, then the operator checks
for a substring match. If the target attribute of the comparison is of type Binary, then the operator looks for a
subsequence of the target that matches the input. If the target attribute of the comparison is a set ("
SS", "NS", or "BS"), then the operator evaluates to true if it finds an
exact match with any member of the set.
CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If the target attribute of the comparison is a String, then the operator checks for
the absence of a substring match. If the target attribute of the comparison is Binary, then the operator checks
for the absence of a subsequence of the target that matches the input. If the target attribute of the comparison
is a set ("SS", "NS", or "BS"), then the operator evaluates to true if it
does not find an exact match with any member of the set.
NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
BEGINS_WITH : Checks for a prefix.
AttributeValueList can contain only one AttributeValue of type String or Binary (not a
Number or a set type). The target attribute of the comparison must be of type String or Binary (not a Number or a
set type).
IN : Checks for matching elements in a list.
AttributeValueList can contain one or more AttributeValue elements of type String,
Number, or Binary. These attributes are compared against an existing attribute of an item. If any elements of the
input are equal to the item attribute, the expression evaluates to true.
BETWEEN : Greater than or equal to the first value, and less than or equal to the second value.
AttributeValueList must contain two AttributeValue elements of the same type, either
String, Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or
equal to, the first element and less than, or equal to, the second element. If an item contains an
AttributeValue element of a different type than the one provided in the request, the value does not
match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
{"N":"6"} does not compare to {"NS":["6", "2", "1"]}
For usage examples of AttributeValueList and ComparisonOperator, see Legacy
Conditional Parameters in the Amazon DynamoDB Developer Guide.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue element of type String,
Number, Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue
element of a different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
{"NS":["6", "2", "1"]}.
NE : Not equal. NE is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue of type String, Number,
Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
{"NS":["6", "2", "1"]}.
LE : Less than or equal.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not
compare to {"NS":["6", "2", "1"]}.
LT : Less than.
AttributeValueList can contain only one AttributeValue of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different
type than the one provided in the request, the value does not match. For example, {"S":"6"}
does not equal {"N":"6"}. Also, {"N":"6"} does not compare to
{"NS":["6", "2", "1"]}.
GE : Greater than or equal.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not
compare to {"NS":["6", "2", "1"]}.
GT : Greater than.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not
compare to {"NS":["6", "2", "1"]}.
NOT_NULL : The attribute exists. NOT_NULL is supported for all data types,
including lists and maps.
This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
a" is null, and you evaluate it using NOT_NULL, the result is a Boolean
true. This result is because the attribute "a" exists; its data type is not
relevant to the NOT_NULL comparison operator.
NULL : The attribute does not exist. NULL is supported for all data types,
including lists and maps.
This operator tests for the nonexistence of an attribute, not its data type. If the data type of
attribute "a" is null, and you evaluate it using NULL, the result is a Boolean
false. This is because the attribute "a" exists; its data type is not relevant
to the NULL comparison operator.
CONTAINS : Checks for a subsequence, or value in a set.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If the target attribute of the comparison is of type String, then the
operator checks for a substring match. If the target attribute of the comparison is of type Binary, then
the operator looks for a subsequence of the target that matches the input. If the target attribute of the
comparison is a set ("SS", "NS", or "BS"), then the operator
evaluates to true if it finds an exact match with any member of the set.
CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If the target attribute of the comparison is a String, then the
operator checks for the absence of a substring match. If the target attribute of the comparison is
Binary, then the operator checks for the absence of a subsequence of the target that matches the input.
If the target attribute of the comparison is a set ("SS", "NS", or "
BS"), then the operator evaluates to true if it does not find an exact match with any
member of the set.
NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
BEGINS_WITH : Checks for a prefix.
AttributeValueList can contain only one AttributeValue of type String or Binary
(not a Number or a set type). The target attribute of the comparison must be of type String or Binary
(not a Number or a set type).
IN : Checks for matching elements in a list.
AttributeValueList can contain one or more AttributeValue elements of type
String, Number, or Binary. These attributes are compared against an existing attribute of an item. If any
elements of the input are equal to the item attribute, the expression evaluates to true.
BETWEEN : Greater than or equal to the first value, and less than or equal to the second
value.
AttributeValueList must contain two AttributeValue elements of the same type,
either String, Number, or Binary (not a set type). A target attribute matches if the target value is
greater than, or equal to, the first element and less than, or equal to, the second element. If an item
contains an AttributeValue element of a different type than the one provided in the request,
the value does not match. For example, {"S":"6"} does not compare to {"N":"6"}.
Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
For usage examples of AttributeValueList and ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB Developer Guide.
ComparisonOperatorpublic Condition withComparisonOperator(String comparisonOperator)
A comparator for evaluating attributes. For example, equals, greater than, less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue element of type String, Number,
Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
{"NS":["6", "2", "1"]}.
NE : Not equal. NE is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue of type String, Number, Binary,
String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a different type
than the one provided in the request, the value does not match. For example, {"S":"6"} does not
equal {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
LE : Less than or equal.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type than
the one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
LT : Less than.
AttributeValueList can contain only one AttributeValue of type String, Number, or
Binary (not a set type). If an item contains an AttributeValue element of a different type than the
one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
GE : Greater than or equal.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type than
the one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
GT : Greater than.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type than
the one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
NOT_NULL : The attribute exists. NOT_NULL is supported for all data types, including
lists and maps.
This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
a" is null, and you evaluate it using NOT_NULL, the result is a Boolean
true. This result is because the attribute "a" exists; its data type is not relevant to
the NOT_NULL comparison operator.
NULL : The attribute does not exist. NULL is supported for all data types, including
lists and maps.
This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute "
a" is null, and you evaluate it using NULL, the result is a Boolean false.
This is because the attribute "a" exists; its data type is not relevant to the NULL
comparison operator.
CONTAINS : Checks for a subsequence, or value in a set.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If the target attribute of the comparison is of type String, then the operator checks
for a substring match. If the target attribute of the comparison is of type Binary, then the operator looks for a
subsequence of the target that matches the input. If the target attribute of the comparison is a set ("
SS", "NS", or "BS"), then the operator evaluates to true if it finds an
exact match with any member of the set.
CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If the target attribute of the comparison is a String, then the operator checks for
the absence of a substring match. If the target attribute of the comparison is Binary, then the operator checks
for the absence of a subsequence of the target that matches the input. If the target attribute of the comparison
is a set ("SS", "NS", or "BS"), then the operator evaluates to true if it
does not find an exact match with any member of the set.
NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
BEGINS_WITH : Checks for a prefix.
AttributeValueList can contain only one AttributeValue of type String or Binary (not a
Number or a set type). The target attribute of the comparison must be of type String or Binary (not a Number or a
set type).
IN : Checks for matching elements in a list.
AttributeValueList can contain one or more AttributeValue elements of type String,
Number, or Binary. These attributes are compared against an existing attribute of an item. If any elements of the
input are equal to the item attribute, the expression evaluates to true.
BETWEEN : Greater than or equal to the first value, and less than or equal to the second value.
AttributeValueList must contain two AttributeValue elements of the same type, either
String, Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or
equal to, the first element and less than, or equal to, the second element. If an item contains an
AttributeValue element of a different type than the one provided in the request, the value does not
match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
{"N":"6"} does not compare to {"NS":["6", "2", "1"]}
For usage examples of AttributeValueList and ComparisonOperator, see Legacy
Conditional Parameters in the Amazon DynamoDB Developer Guide.
comparisonOperator - A comparator for evaluating attributes. For example, equals, greater than, less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue element of type String,
Number, Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue
element of a different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
{"NS":["6", "2", "1"]}.
NE : Not equal. NE is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue of type String, Number,
Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
{"NS":["6", "2", "1"]}.
LE : Less than or equal.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not
compare to {"NS":["6", "2", "1"]}.
LT : Less than.
AttributeValueList can contain only one AttributeValue of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type
than the one provided in the request, the value does not match. For example, {"S":"6"} does
not equal {"N":"6"}. Also, {"N":"6"} does not compare to
{"NS":["6", "2", "1"]}.
GE : Greater than or equal.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not
compare to {"NS":["6", "2", "1"]}.
GT : Greater than.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not
compare to {"NS":["6", "2", "1"]}.
NOT_NULL : The attribute exists. NOT_NULL is supported for all data types,
including lists and maps.
This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
a" is null, and you evaluate it using NOT_NULL, the result is a Boolean
true. This result is because the attribute "a" exists; its data type is not
relevant to the NOT_NULL comparison operator.
NULL : The attribute does not exist. NULL is supported for all data types,
including lists and maps.
This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute
"a" is null, and you evaluate it using NULL, the result is a Boolean
false. This is because the attribute "a" exists; its data type is not relevant
to the NULL comparison operator.
CONTAINS : Checks for a subsequence, or value in a set.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If the target attribute of the comparison is of type String, then the
operator checks for a substring match. If the target attribute of the comparison is of type Binary, then
the operator looks for a subsequence of the target that matches the input. If the target attribute of the
comparison is a set ("SS", "NS", or "BS"), then the operator
evaluates to true if it finds an exact match with any member of the set.
CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If the target attribute of the comparison is a String, then the
operator checks for the absence of a substring match. If the target attribute of the comparison is Binary,
then the operator checks for the absence of a subsequence of the target that matches the input. If the
target attribute of the comparison is a set ("SS", "NS", or "BS"),
then the operator evaluates to true if it does not find an exact match with any member of the set.
NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
BEGINS_WITH : Checks for a prefix.
AttributeValueList can contain only one AttributeValue of type String or Binary
(not a Number or a set type). The target attribute of the comparison must be of type String or Binary (not
a Number or a set type).
IN : Checks for matching elements in a list.
AttributeValueList can contain one or more AttributeValue elements of type
String, Number, or Binary. These attributes are compared against an existing attribute of an item. If any
elements of the input are equal to the item attribute, the expression evaluates to true.
BETWEEN : Greater than or equal to the first value, and less than or equal to the second
value.
AttributeValueList must contain two AttributeValue elements of the same type,
either String, Number, or Binary (not a set type). A target attribute matches if the target value is
greater than, or equal to, the first element and less than, or equal to, the second element. If an item
contains an AttributeValue element of a different type than the one provided in the request,
the value does not match. For example, {"S":"6"} does not compare to {"N":"6"}.
Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
For usage examples of AttributeValueList and ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB Developer Guide.
ComparisonOperatorpublic void setComparisonOperator(ComparisonOperator comparisonOperator)
A comparator for evaluating attributes. For example, equals, greater than, less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue element of type String, Number,
Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
{"NS":["6", "2", "1"]}.
NE : Not equal. NE is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue of type String, Number, Binary,
String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a different type
than the one provided in the request, the value does not match. For example, {"S":"6"} does not
equal {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
LE : Less than or equal.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type than
the one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
LT : Less than.
AttributeValueList can contain only one AttributeValue of type String, Number, or
Binary (not a set type). If an item contains an AttributeValue element of a different type than the
one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
GE : Greater than or equal.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type than
the one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
GT : Greater than.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type than
the one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
NOT_NULL : The attribute exists. NOT_NULL is supported for all data types, including
lists and maps.
This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
a" is null, and you evaluate it using NOT_NULL, the result is a Boolean
true. This result is because the attribute "a" exists; its data type is not relevant to
the NOT_NULL comparison operator.
NULL : The attribute does not exist. NULL is supported for all data types, including
lists and maps.
This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute "
a" is null, and you evaluate it using NULL, the result is a Boolean false.
This is because the attribute "a" exists; its data type is not relevant to the NULL
comparison operator.
CONTAINS : Checks for a subsequence, or value in a set.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If the target attribute of the comparison is of type String, then the operator checks
for a substring match. If the target attribute of the comparison is of type Binary, then the operator looks for a
subsequence of the target that matches the input. If the target attribute of the comparison is a set ("
SS", "NS", or "BS"), then the operator evaluates to true if it finds an
exact match with any member of the set.
CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If the target attribute of the comparison is a String, then the operator checks for
the absence of a substring match. If the target attribute of the comparison is Binary, then the operator checks
for the absence of a subsequence of the target that matches the input. If the target attribute of the comparison
is a set ("SS", "NS", or "BS"), then the operator evaluates to true if it
does not find an exact match with any member of the set.
NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
BEGINS_WITH : Checks for a prefix.
AttributeValueList can contain only one AttributeValue of type String or Binary (not a
Number or a set type). The target attribute of the comparison must be of type String or Binary (not a Number or a
set type).
IN : Checks for matching elements in a list.
AttributeValueList can contain one or more AttributeValue elements of type String,
Number, or Binary. These attributes are compared against an existing attribute of an item. If any elements of the
input are equal to the item attribute, the expression evaluates to true.
BETWEEN : Greater than or equal to the first value, and less than or equal to the second value.
AttributeValueList must contain two AttributeValue elements of the same type, either
String, Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or
equal to, the first element and less than, or equal to, the second element. If an item contains an
AttributeValue element of a different type than the one provided in the request, the value does not
match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
{"N":"6"} does not compare to {"NS":["6", "2", "1"]}
For usage examples of AttributeValueList and ComparisonOperator, see Legacy
Conditional Parameters in the Amazon DynamoDB Developer Guide.
comparisonOperator - A comparator for evaluating attributes. For example, equals, greater than, less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue element of type String,
Number, Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue
element of a different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
{"NS":["6", "2", "1"]}.
NE : Not equal. NE is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue of type String, Number,
Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
{"NS":["6", "2", "1"]}.
LE : Less than or equal.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not
compare to {"NS":["6", "2", "1"]}.
LT : Less than.
AttributeValueList can contain only one AttributeValue of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type
than the one provided in the request, the value does not match. For example, {"S":"6"} does
not equal {"N":"6"}. Also, {"N":"6"} does not compare to
{"NS":["6", "2", "1"]}.
GE : Greater than or equal.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not
compare to {"NS":["6", "2", "1"]}.
GT : Greater than.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not
compare to {"NS":["6", "2", "1"]}.
NOT_NULL : The attribute exists. NOT_NULL is supported for all data types,
including lists and maps.
This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
a" is null, and you evaluate it using NOT_NULL, the result is a Boolean
true. This result is because the attribute "a" exists; its data type is not
relevant to the NOT_NULL comparison operator.
NULL : The attribute does not exist. NULL is supported for all data types,
including lists and maps.
This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute
"a" is null, and you evaluate it using NULL, the result is a Boolean
false. This is because the attribute "a" exists; its data type is not relevant
to the NULL comparison operator.
CONTAINS : Checks for a subsequence, or value in a set.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If the target attribute of the comparison is of type String, then the
operator checks for a substring match. If the target attribute of the comparison is of type Binary, then
the operator looks for a subsequence of the target that matches the input. If the target attribute of the
comparison is a set ("SS", "NS", or "BS"), then the operator
evaluates to true if it finds an exact match with any member of the set.
CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If the target attribute of the comparison is a String, then the
operator checks for the absence of a substring match. If the target attribute of the comparison is Binary,
then the operator checks for the absence of a subsequence of the target that matches the input. If the
target attribute of the comparison is a set ("SS", "NS", or "BS"),
then the operator evaluates to true if it does not find an exact match with any member of the set.
NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
BEGINS_WITH : Checks for a prefix.
AttributeValueList can contain only one AttributeValue of type String or Binary
(not a Number or a set type). The target attribute of the comparison must be of type String or Binary (not
a Number or a set type).
IN : Checks for matching elements in a list.
AttributeValueList can contain one or more AttributeValue elements of type
String, Number, or Binary. These attributes are compared against an existing attribute of an item. If any
elements of the input are equal to the item attribute, the expression evaluates to true.
BETWEEN : Greater than or equal to the first value, and less than or equal to the second
value.
AttributeValueList must contain two AttributeValue elements of the same type,
either String, Number, or Binary (not a set type). A target attribute matches if the target value is
greater than, or equal to, the first element and less than, or equal to, the second element. If an item
contains an AttributeValue element of a different type than the one provided in the request,
the value does not match. For example, {"S":"6"} does not compare to {"N":"6"}.
Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
For usage examples of AttributeValueList and ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB Developer Guide.
ComparisonOperatorpublic Condition withComparisonOperator(ComparisonOperator comparisonOperator)
A comparator for evaluating attributes. For example, equals, greater than, less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue element of type String, Number,
Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
{"NS":["6", "2", "1"]}.
NE : Not equal. NE is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue of type String, Number, Binary,
String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a different type
than the one provided in the request, the value does not match. For example, {"S":"6"} does not
equal {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
LE : Less than or equal.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type than
the one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
LT : Less than.
AttributeValueList can contain only one AttributeValue of type String, Number, or
Binary (not a set type). If an item contains an AttributeValue element of a different type than the
one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
GE : Greater than or equal.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type than
the one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
GT : Greater than.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type than
the one provided in the request, the value does not match. For example, {"S":"6"} does not equal
{"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
NOT_NULL : The attribute exists. NOT_NULL is supported for all data types, including
lists and maps.
This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
a" is null, and you evaluate it using NOT_NULL, the result is a Boolean
true. This result is because the attribute "a" exists; its data type is not relevant to
the NOT_NULL comparison operator.
NULL : The attribute does not exist. NULL is supported for all data types, including
lists and maps.
This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute "
a" is null, and you evaluate it using NULL, the result is a Boolean false.
This is because the attribute "a" exists; its data type is not relevant to the NULL
comparison operator.
CONTAINS : Checks for a subsequence, or value in a set.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If the target attribute of the comparison is of type String, then the operator checks
for a substring match. If the target attribute of the comparison is of type Binary, then the operator looks for a
subsequence of the target that matches the input. If the target attribute of the comparison is a set ("
SS", "NS", or "BS"), then the operator evaluates to true if it finds an
exact match with any member of the set.
CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
AttributeValueList can contain only one AttributeValue element of type String, Number,
or Binary (not a set type). If the target attribute of the comparison is a String, then the operator checks for
the absence of a substring match. If the target attribute of the comparison is Binary, then the operator checks
for the absence of a subsequence of the target that matches the input. If the target attribute of the comparison
is a set ("SS", "NS", or "BS"), then the operator evaluates to true if it
does not find an exact match with any member of the set.
NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
BEGINS_WITH : Checks for a prefix.
AttributeValueList can contain only one AttributeValue of type String or Binary (not a
Number or a set type). The target attribute of the comparison must be of type String or Binary (not a Number or a
set type).
IN : Checks for matching elements in a list.
AttributeValueList can contain one or more AttributeValue elements of type String,
Number, or Binary. These attributes are compared against an existing attribute of an item. If any elements of the
input are equal to the item attribute, the expression evaluates to true.
BETWEEN : Greater than or equal to the first value, and less than or equal to the second value.
AttributeValueList must contain two AttributeValue elements of the same type, either
String, Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or
equal to, the first element and less than, or equal to, the second element. If an item contains an
AttributeValue element of a different type than the one provided in the request, the value does not
match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
{"N":"6"} does not compare to {"NS":["6", "2", "1"]}
For usage examples of AttributeValueList and ComparisonOperator, see Legacy
Conditional Parameters in the Amazon DynamoDB Developer Guide.
comparisonOperator - A comparator for evaluating attributes. For example, equals, greater than, less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue element of type String,
Number, Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue
element of a different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
{"NS":["6", "2", "1"]}.
NE : Not equal. NE is supported for all data types, including lists and maps.
AttributeValueList can contain only one AttributeValue of type String, Number,
Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
{"NS":["6", "2", "1"]}.
LE : Less than or equal.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not
compare to {"NS":["6", "2", "1"]}.
LT : Less than.
AttributeValueList can contain only one AttributeValue of type String, Number,
or Binary (not a set type). If an item contains an AttributeValue element of a different type
than the one provided in the request, the value does not match. For example, {"S":"6"} does
not equal {"N":"6"}. Also, {"N":"6"} does not compare to
{"NS":["6", "2", "1"]}.
GE : Greater than or equal.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not
compare to {"NS":["6", "2", "1"]}.
GT : Greater than.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If an item contains an AttributeValue element of a
different type than the one provided in the request, the value does not match. For example,
{"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not
compare to {"NS":["6", "2", "1"]}.
NOT_NULL : The attribute exists. NOT_NULL is supported for all data types,
including lists and maps.
This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
a" is null, and you evaluate it using NOT_NULL, the result is a Boolean
true. This result is because the attribute "a" exists; its data type is not
relevant to the NOT_NULL comparison operator.
NULL : The attribute does not exist. NULL is supported for all data types,
including lists and maps.
This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute
"a" is null, and you evaluate it using NULL, the result is a Boolean
false. This is because the attribute "a" exists; its data type is not relevant
to the NULL comparison operator.
CONTAINS : Checks for a subsequence, or value in a set.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If the target attribute of the comparison is of type String, then the
operator checks for a substring match. If the target attribute of the comparison is of type Binary, then
the operator looks for a subsequence of the target that matches the input. If the target attribute of the
comparison is a set ("SS", "NS", or "BS"), then the operator
evaluates to true if it finds an exact match with any member of the set.
CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
AttributeValueList can contain only one AttributeValue element of type String,
Number, or Binary (not a set type). If the target attribute of the comparison is a String, then the
operator checks for the absence of a substring match. If the target attribute of the comparison is Binary,
then the operator checks for the absence of a subsequence of the target that matches the input. If the
target attribute of the comparison is a set ("SS", "NS", or "BS"),
then the operator evaluates to true if it does not find an exact match with any member of the set.
NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
" can be a list; however, "b" cannot be a set, a map, or a list.
BEGINS_WITH : Checks for a prefix.
AttributeValueList can contain only one AttributeValue of type String or Binary
(not a Number or a set type). The target attribute of the comparison must be of type String or Binary (not
a Number or a set type).
IN : Checks for matching elements in a list.
AttributeValueList can contain one or more AttributeValue elements of type
String, Number, or Binary. These attributes are compared against an existing attribute of an item. If any
elements of the input are equal to the item attribute, the expression evaluates to true.
BETWEEN : Greater than or equal to the first value, and less than or equal to the second
value.
AttributeValueList must contain two AttributeValue elements of the same type,
either String, Number, or Binary (not a set type). A target attribute matches if the target value is
greater than, or equal to, the first element and less than, or equal to, the second element. If an item
contains an AttributeValue element of a different type than the one provided in the request,
the value does not match. For example, {"S":"6"} does not compare to {"N":"6"}.
Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
For usage examples of AttributeValueList and ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB Developer Guide.
ComparisonOperatorpublic String toString()
toString in class ObjectObject.toString()public void marshall(ProtocolMarshaller protocolMarshaller)
StructuredPojoProtocolMarshaller.marshall in interface StructuredPojoprotocolMarshaller - Implementation of ProtocolMarshaller used to marshall this object's data.