#[non_exhaustive]pub struct UpdateItemInputBuilder { /* private fields */ }
Expand description
A builder for UpdateItemInput
.
Implementations§
source§impl UpdateItemInputBuilder
impl UpdateItemInputBuilder
sourcepub fn table_name(self, input: impl Into<String>) -> Self
pub fn table_name(self, input: impl Into<String>) -> Self
The name of the table containing the item to update. You can also provide the Amazon Resource Name (ARN) of the table in this parameter.
This field is required.sourcepub fn set_table_name(self, input: Option<String>) -> Self
pub fn set_table_name(self, input: Option<String>) -> Self
The name of the table containing the item to update. You can also provide the Amazon Resource Name (ARN) of the table in this parameter.
sourcepub fn get_table_name(&self) -> &Option<String>
pub fn get_table_name(&self) -> &Option<String>
The name of the table containing the item to update. You can also provide the Amazon Resource Name (ARN) of the table in this parameter.
sourcepub fn key(self, k: impl Into<String>, v: AttributeValue) -> Self
pub fn key(self, k: impl Into<String>, v: AttributeValue) -> Self
Adds a key-value pair to key
.
To override the contents of this collection use set_key
.
The primary key of the item to be updated. Each element consists of an attribute name and a value for that attribute.
For the primary key, you must provide all of the attributes. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.
sourcepub fn set_key(self, input: Option<HashMap<String, AttributeValue>>) -> Self
pub fn set_key(self, input: Option<HashMap<String, AttributeValue>>) -> Self
The primary key of the item to be updated. Each element consists of an attribute name and a value for that attribute.
For the primary key, you must provide all of the attributes. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.
sourcepub fn get_key(&self) -> &Option<HashMap<String, AttributeValue>>
pub fn get_key(&self) -> &Option<HashMap<String, AttributeValue>>
The primary key of the item to be updated. Each element consists of an attribute name and a value for that attribute.
For the primary key, you must provide all of the attributes. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.
sourcepub fn attribute_updates(
self,
k: impl Into<String>,
v: AttributeValueUpdate,
) -> Self
pub fn attribute_updates( self, k: impl Into<String>, v: AttributeValueUpdate, ) -> Self
Adds a key-value pair to attribute_updates
.
To override the contents of this collection use set_attribute_updates
.
This is a legacy parameter. Use UpdateExpression
instead. For more information, see AttributeUpdates in the Amazon DynamoDB Developer Guide.
sourcepub fn set_attribute_updates(
self,
input: Option<HashMap<String, AttributeValueUpdate>>,
) -> Self
pub fn set_attribute_updates( self, input: Option<HashMap<String, AttributeValueUpdate>>, ) -> Self
This is a legacy parameter. Use UpdateExpression
instead. For more information, see AttributeUpdates in the Amazon DynamoDB Developer Guide.
sourcepub fn get_attribute_updates(
&self,
) -> &Option<HashMap<String, AttributeValueUpdate>>
pub fn get_attribute_updates( &self, ) -> &Option<HashMap<String, AttributeValueUpdate>>
This is a legacy parameter. Use UpdateExpression
instead. For more information, see AttributeUpdates in the Amazon DynamoDB Developer Guide.
sourcepub fn expected(self, k: impl Into<String>, v: ExpectedAttributeValue) -> Self
pub fn expected(self, k: impl Into<String>, v: ExpectedAttributeValue) -> Self
Adds a key-value pair to expected
.
To override the contents of this collection use set_expected
.
This is a legacy parameter. Use ConditionExpression
instead. For more information, see Expected in the Amazon DynamoDB Developer Guide.
sourcepub fn set_expected(
self,
input: Option<HashMap<String, ExpectedAttributeValue>>,
) -> Self
pub fn set_expected( self, input: Option<HashMap<String, ExpectedAttributeValue>>, ) -> Self
This is a legacy parameter. Use ConditionExpression
instead. For more information, see Expected in the Amazon DynamoDB Developer Guide.
sourcepub fn get_expected(&self) -> &Option<HashMap<String, ExpectedAttributeValue>>
pub fn get_expected(&self) -> &Option<HashMap<String, ExpectedAttributeValue>>
This is a legacy parameter. Use ConditionExpression
instead. For more information, see Expected in the Amazon DynamoDB Developer Guide.
sourcepub fn conditional_operator(self, input: ConditionalOperator) -> Self
pub fn conditional_operator(self, input: ConditionalOperator) -> Self
This is a legacy parameter. Use ConditionExpression
instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.
sourcepub fn set_conditional_operator(
self,
input: Option<ConditionalOperator>,
) -> Self
pub fn set_conditional_operator( self, input: Option<ConditionalOperator>, ) -> Self
This is a legacy parameter. Use ConditionExpression
instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.
sourcepub fn get_conditional_operator(&self) -> &Option<ConditionalOperator>
pub fn get_conditional_operator(&self) -> &Option<ConditionalOperator>
This is a legacy parameter. Use ConditionExpression
instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.
sourcepub fn return_values(self, input: ReturnValue) -> Self
pub fn return_values(self, input: ReturnValue) -> Self
Use ReturnValues
if you want to get the item attributes as they appear before or after they are successfully updated. For UpdateItem
, the valid values are:
-
NONE
- IfReturnValues
is not specified, or if its value isNONE
, then nothing is returned. (This setting is the default forReturnValues
.) -
ALL_OLD
- Returns all of the attributes of the item, as they appeared before the UpdateItem operation. -
UPDATED_OLD
- Returns only the updated attributes, as they appeared before the UpdateItem operation. -
ALL_NEW
- Returns all of the attributes of the item, as they appear after the UpdateItem operation. -
UPDATED_NEW
- Returns only the updated attributes, as they appear after the UpdateItem operation.
There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.
The values returned are strongly consistent.
sourcepub fn set_return_values(self, input: Option<ReturnValue>) -> Self
pub fn set_return_values(self, input: Option<ReturnValue>) -> Self
Use ReturnValues
if you want to get the item attributes as they appear before or after they are successfully updated. For UpdateItem
, the valid values are:
-
NONE
- IfReturnValues
is not specified, or if its value isNONE
, then nothing is returned. (This setting is the default forReturnValues
.) -
ALL_OLD
- Returns all of the attributes of the item, as they appeared before the UpdateItem operation. -
UPDATED_OLD
- Returns only the updated attributes, as they appeared before the UpdateItem operation. -
ALL_NEW
- Returns all of the attributes of the item, as they appear after the UpdateItem operation. -
UPDATED_NEW
- Returns only the updated attributes, as they appear after the UpdateItem operation.
There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.
The values returned are strongly consistent.
sourcepub fn get_return_values(&self) -> &Option<ReturnValue>
pub fn get_return_values(&self) -> &Option<ReturnValue>
Use ReturnValues
if you want to get the item attributes as they appear before or after they are successfully updated. For UpdateItem
, the valid values are:
-
NONE
- IfReturnValues
is not specified, or if its value isNONE
, then nothing is returned. (This setting is the default forReturnValues
.) -
ALL_OLD
- Returns all of the attributes of the item, as they appeared before the UpdateItem operation. -
UPDATED_OLD
- Returns only the updated attributes, as they appeared before the UpdateItem operation. -
ALL_NEW
- Returns all of the attributes of the item, as they appear after the UpdateItem operation. -
UPDATED_NEW
- Returns only the updated attributes, as they appear after the UpdateItem operation.
There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.
The values returned are strongly consistent.
sourcepub fn return_consumed_capacity(self, input: ReturnConsumedCapacity) -> Self
pub fn return_consumed_capacity(self, input: ReturnConsumedCapacity) -> Self
Determines the level of detail about either provisioned or on-demand throughput consumption that is returned in the response:
-
INDEXES
- The response includes the aggregateConsumedCapacity
for the operation, together withConsumedCapacity
for each table and secondary index that was accessed.Note that some operations, such as
GetItem
andBatchGetItem
, do not access any indexes at all. In these cases, specifyingINDEXES
will only returnConsumedCapacity
information for table(s). -
TOTAL
- The response includes only the aggregateConsumedCapacity
for the operation. -
NONE
- NoConsumedCapacity
details are included in the response.
sourcepub fn set_return_consumed_capacity(
self,
input: Option<ReturnConsumedCapacity>,
) -> Self
pub fn set_return_consumed_capacity( self, input: Option<ReturnConsumedCapacity>, ) -> Self
Determines the level of detail about either provisioned or on-demand throughput consumption that is returned in the response:
-
INDEXES
- The response includes the aggregateConsumedCapacity
for the operation, together withConsumedCapacity
for each table and secondary index that was accessed.Note that some operations, such as
GetItem
andBatchGetItem
, do not access any indexes at all. In these cases, specifyingINDEXES
will only returnConsumedCapacity
information for table(s). -
TOTAL
- The response includes only the aggregateConsumedCapacity
for the operation. -
NONE
- NoConsumedCapacity
details are included in the response.
sourcepub fn get_return_consumed_capacity(&self) -> &Option<ReturnConsumedCapacity>
pub fn get_return_consumed_capacity(&self) -> &Option<ReturnConsumedCapacity>
Determines the level of detail about either provisioned or on-demand throughput consumption that is returned in the response:
-
INDEXES
- The response includes the aggregateConsumedCapacity
for the operation, together withConsumedCapacity
for each table and secondary index that was accessed.Note that some operations, such as
GetItem
andBatchGetItem
, do not access any indexes at all. In these cases, specifyingINDEXES
will only returnConsumedCapacity
information for table(s). -
TOTAL
- The response includes only the aggregateConsumedCapacity
for the operation. -
NONE
- NoConsumedCapacity
details are included in the response.
sourcepub fn return_item_collection_metrics(
self,
input: ReturnItemCollectionMetrics,
) -> Self
pub fn return_item_collection_metrics( self, input: ReturnItemCollectionMetrics, ) -> Self
Determines whether item collection metrics are returned. If set to SIZE
, the response includes statistics about item collections, if any, that were modified during the operation are returned in the response. If set to NONE
(the default), no statistics are returned.
sourcepub fn set_return_item_collection_metrics(
self,
input: Option<ReturnItemCollectionMetrics>,
) -> Self
pub fn set_return_item_collection_metrics( self, input: Option<ReturnItemCollectionMetrics>, ) -> Self
Determines whether item collection metrics are returned. If set to SIZE
, the response includes statistics about item collections, if any, that were modified during the operation are returned in the response. If set to NONE
(the default), no statistics are returned.
sourcepub fn get_return_item_collection_metrics(
&self,
) -> &Option<ReturnItemCollectionMetrics>
pub fn get_return_item_collection_metrics( &self, ) -> &Option<ReturnItemCollectionMetrics>
Determines whether item collection metrics are returned. If set to SIZE
, the response includes statistics about item collections, if any, that were modified during the operation are returned in the response. If set to NONE
(the default), no statistics are returned.
sourcepub fn update_expression(self, input: impl Into<String>) -> Self
pub fn update_expression(self, input: impl Into<String>) -> Self
An expression that defines one or more attributes to be updated, the action to be performed on them, and new values for them.
The following action values are available for UpdateExpression
.
-
SET
- Adds one or more attributes and values to an item. If any of these attributes already exist, they are replaced by the new values. You can also useSET
to add or subtract from an attribute that is of type Number. For example:SET myNum = myNum + :val
SET
supports the following functions:-
if_not_exists (path, operand)
- if the item does not contain an attribute at the specified path, thenif_not_exists
evaluates to operand; otherwise, it evaluates to path. You can use this function to avoid overwriting an attribute that may already be present in the item. -
list_append (operand, operand)
- evaluates to a list with a new element added to it. You can append the new element to the start or the end of the list by reversing the order of the operands.
These function names are case-sensitive.
-
-
REMOVE
- Removes one or more attributes from an item. -
ADD
- Adds the specified value to the item, if the attribute does not already exist. If the attribute does exist, then the behavior ofADD
depends on the data type of the attribute:-
If the existing attribute is a number, and if
Value
is also a number, thenValue
is mathematically added to the existing attribute. IfValue
is a negative number, then it is subtracted from the existing attribute.If you use
ADD
to increment or decrement a number value for an item that doesn't exist before the update, DynamoDB uses0
as the initial value.Similarly, if you use
ADD
for an existing item to increment or decrement an attribute value that doesn't exist before the update, DynamoDB uses0
as the initial value. For example, suppose that the item you want to update doesn't have an attribute nameditemcount
, but you decide toADD
the number3
to this attribute anyway. DynamoDB will create theitemcount
attribute, set its initial value to0
, and finally add3
to it. The result will be a newitemcount
attribute in the item, with a value of3
. -
If the existing data type is a set and if
Value
is also a set, thenValue
is added to the existing set. For example, if the attribute value is the set\[1,2\]
, and theADD
action specified\[3\]
, then the final attribute value is\[1,2,3\]
. An error occurs if anADD
action is specified for a set attribute and the attribute type specified does not match the existing set type.Both sets must have the same primitive data type. For example, if the existing data type is a set of strings, the
Value
must also be a set of strings.
The
ADD
action only supports Number and set data types. In addition,ADD
can only be used on top-level attributes, not nested attributes. -
-
DELETE
- Deletes an element from a set.If a set of values is specified, then those values are subtracted from the old set. For example, if the attribute value was the set
\[a,b,c\]
and theDELETE
action specifies\[a,c\]
, then the final attribute value is\[b\]
. Specifying an empty set is an error.The
DELETE
action only supports set data types. In addition,DELETE
can only be used on top-level attributes, not nested attributes.
You can have many actions in a single expression, such as the following: SET a=:value1, b=:value2 DELETE :value3, :value4, :value5
For more information on update expressions, see Modifying Items and Attributes in the Amazon DynamoDB Developer Guide.
sourcepub fn set_update_expression(self, input: Option<String>) -> Self
pub fn set_update_expression(self, input: Option<String>) -> Self
An expression that defines one or more attributes to be updated, the action to be performed on them, and new values for them.
The following action values are available for UpdateExpression
.
-
SET
- Adds one or more attributes and values to an item. If any of these attributes already exist, they are replaced by the new values. You can also useSET
to add or subtract from an attribute that is of type Number. For example:SET myNum = myNum + :val
SET
supports the following functions:-
if_not_exists (path, operand)
- if the item does not contain an attribute at the specified path, thenif_not_exists
evaluates to operand; otherwise, it evaluates to path. You can use this function to avoid overwriting an attribute that may already be present in the item. -
list_append (operand, operand)
- evaluates to a list with a new element added to it. You can append the new element to the start or the end of the list by reversing the order of the operands.
These function names are case-sensitive.
-
-
REMOVE
- Removes one or more attributes from an item. -
ADD
- Adds the specified value to the item, if the attribute does not already exist. If the attribute does exist, then the behavior ofADD
depends on the data type of the attribute:-
If the existing attribute is a number, and if
Value
is also a number, thenValue
is mathematically added to the existing attribute. IfValue
is a negative number, then it is subtracted from the existing attribute.If you use
ADD
to increment or decrement a number value for an item that doesn't exist before the update, DynamoDB uses0
as the initial value.Similarly, if you use
ADD
for an existing item to increment or decrement an attribute value that doesn't exist before the update, DynamoDB uses0
as the initial value. For example, suppose that the item you want to update doesn't have an attribute nameditemcount
, but you decide toADD
the number3
to this attribute anyway. DynamoDB will create theitemcount
attribute, set its initial value to0
, and finally add3
to it. The result will be a newitemcount
attribute in the item, with a value of3
. -
If the existing data type is a set and if
Value
is also a set, thenValue
is added to the existing set. For example, if the attribute value is the set\[1,2\]
, and theADD
action specified\[3\]
, then the final attribute value is\[1,2,3\]
. An error occurs if anADD
action is specified for a set attribute and the attribute type specified does not match the existing set type.Both sets must have the same primitive data type. For example, if the existing data type is a set of strings, the
Value
must also be a set of strings.
The
ADD
action only supports Number and set data types. In addition,ADD
can only be used on top-level attributes, not nested attributes. -
-
DELETE
- Deletes an element from a set.If a set of values is specified, then those values are subtracted from the old set. For example, if the attribute value was the set
\[a,b,c\]
and theDELETE
action specifies\[a,c\]
, then the final attribute value is\[b\]
. Specifying an empty set is an error.The
DELETE
action only supports set data types. In addition,DELETE
can only be used on top-level attributes, not nested attributes.
You can have many actions in a single expression, such as the following: SET a=:value1, b=:value2 DELETE :value3, :value4, :value5
For more information on update expressions, see Modifying Items and Attributes in the Amazon DynamoDB Developer Guide.
sourcepub fn get_update_expression(&self) -> &Option<String>
pub fn get_update_expression(&self) -> &Option<String>
An expression that defines one or more attributes to be updated, the action to be performed on them, and new values for them.
The following action values are available for UpdateExpression
.
-
SET
- Adds one or more attributes and values to an item. If any of these attributes already exist, they are replaced by the new values. You can also useSET
to add or subtract from an attribute that is of type Number. For example:SET myNum = myNum + :val
SET
supports the following functions:-
if_not_exists (path, operand)
- if the item does not contain an attribute at the specified path, thenif_not_exists
evaluates to operand; otherwise, it evaluates to path. You can use this function to avoid overwriting an attribute that may already be present in the item. -
list_append (operand, operand)
- evaluates to a list with a new element added to it. You can append the new element to the start or the end of the list by reversing the order of the operands.
These function names are case-sensitive.
-
-
REMOVE
- Removes one or more attributes from an item. -
ADD
- Adds the specified value to the item, if the attribute does not already exist. If the attribute does exist, then the behavior ofADD
depends on the data type of the attribute:-
If the existing attribute is a number, and if
Value
is also a number, thenValue
is mathematically added to the existing attribute. IfValue
is a negative number, then it is subtracted from the existing attribute.If you use
ADD
to increment or decrement a number value for an item that doesn't exist before the update, DynamoDB uses0
as the initial value.Similarly, if you use
ADD
for an existing item to increment or decrement an attribute value that doesn't exist before the update, DynamoDB uses0
as the initial value. For example, suppose that the item you want to update doesn't have an attribute nameditemcount
, but you decide toADD
the number3
to this attribute anyway. DynamoDB will create theitemcount
attribute, set its initial value to0
, and finally add3
to it. The result will be a newitemcount
attribute in the item, with a value of3
. -
If the existing data type is a set and if
Value
is also a set, thenValue
is added to the existing set. For example, if the attribute value is the set\[1,2\]
, and theADD
action specified\[3\]
, then the final attribute value is\[1,2,3\]
. An error occurs if anADD
action is specified for a set attribute and the attribute type specified does not match the existing set type.Both sets must have the same primitive data type. For example, if the existing data type is a set of strings, the
Value
must also be a set of strings.
The
ADD
action only supports Number and set data types. In addition,ADD
can only be used on top-level attributes, not nested attributes. -
-
DELETE
- Deletes an element from a set.If a set of values is specified, then those values are subtracted from the old set. For example, if the attribute value was the set
\[a,b,c\]
and theDELETE
action specifies\[a,c\]
, then the final attribute value is\[b\]
. Specifying an empty set is an error.The
DELETE
action only supports set data types. In addition,DELETE
can only be used on top-level attributes, not nested attributes.
You can have many actions in a single expression, such as the following: SET a=:value1, b=:value2 DELETE :value3, :value4, :value5
For more information on update expressions, see Modifying Items and Attributes in the Amazon DynamoDB Developer Guide.
sourcepub fn condition_expression(self, input: impl Into<String>) -> Self
pub fn condition_expression(self, input: impl Into<String>) -> Self
A condition that must be satisfied in order for a conditional update to succeed.
An expression can contain any of the following:
-
Functions:
attribute_exists | attribute_not_exists | attribute_type | contains | begins_with | size
These function names are case-sensitive.
-
Comparison operators:
= | <> | < | > | <= | >= | BETWEEN | IN
-
Logical operators:
AND | OR | NOT
For more information about condition expressions, see Specifying Conditions in the Amazon DynamoDB Developer Guide.
sourcepub fn set_condition_expression(self, input: Option<String>) -> Self
pub fn set_condition_expression(self, input: Option<String>) -> Self
A condition that must be satisfied in order for a conditional update to succeed.
An expression can contain any of the following:
-
Functions:
attribute_exists | attribute_not_exists | attribute_type | contains | begins_with | size
These function names are case-sensitive.
-
Comparison operators:
= | <> | < | > | <= | >= | BETWEEN | IN
-
Logical operators:
AND | OR | NOT
For more information about condition expressions, see Specifying Conditions in the Amazon DynamoDB Developer Guide.
sourcepub fn get_condition_expression(&self) -> &Option<String>
pub fn get_condition_expression(&self) -> &Option<String>
A condition that must be satisfied in order for a conditional update to succeed.
An expression can contain any of the following:
-
Functions:
attribute_exists | attribute_not_exists | attribute_type | contains | begins_with | size
These function names are case-sensitive.
-
Comparison operators:
= | <> | < | > | <= | >= | BETWEEN | IN
-
Logical operators:
AND | OR | NOT
For more information about condition expressions, see Specifying Conditions in the Amazon DynamoDB Developer Guide.
sourcepub fn expression_attribute_names(
self,
k: impl Into<String>,
v: impl Into<String>,
) -> Self
pub fn expression_attribute_names( self, k: impl Into<String>, v: impl Into<String>, ) -> Self
Adds a key-value pair to expression_attribute_names
.
To override the contents of this collection use set_expression_attribute_names
.
One or more substitution tokens for attribute names in an expression. The following are some use cases for using ExpressionAttributeNames
:
-
To access an attribute whose name conflicts with a DynamoDB reserved word.
-
To create a placeholder for repeating occurrences of an attribute name in an expression.
-
To prevent special characters in an attribute name from being misinterpreted in an expression.
Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:
-
Percentile
The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide.) To work around this, you could specify the following for ExpressionAttributeNames
:
-
{"#P":"Percentile"}
You could then use this substitution in an expression, as in this example:
-
#P = :val
Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.
For more information about expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
sourcepub fn set_expression_attribute_names(
self,
input: Option<HashMap<String, String>>,
) -> Self
pub fn set_expression_attribute_names( self, input: Option<HashMap<String, String>>, ) -> Self
One or more substitution tokens for attribute names in an expression. The following are some use cases for using ExpressionAttributeNames
:
-
To access an attribute whose name conflicts with a DynamoDB reserved word.
-
To create a placeholder for repeating occurrences of an attribute name in an expression.
-
To prevent special characters in an attribute name from being misinterpreted in an expression.
Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:
-
Percentile
The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide.) To work around this, you could specify the following for ExpressionAttributeNames
:
-
{"#P":"Percentile"}
You could then use this substitution in an expression, as in this example:
-
#P = :val
Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.
For more information about expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
sourcepub fn get_expression_attribute_names(&self) -> &Option<HashMap<String, String>>
pub fn get_expression_attribute_names(&self) -> &Option<HashMap<String, String>>
One or more substitution tokens for attribute names in an expression. The following are some use cases for using ExpressionAttributeNames
:
-
To access an attribute whose name conflicts with a DynamoDB reserved word.
-
To create a placeholder for repeating occurrences of an attribute name in an expression.
-
To prevent special characters in an attribute name from being misinterpreted in an expression.
Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:
-
Percentile
The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide.) To work around this, you could specify the following for ExpressionAttributeNames
:
-
{"#P":"Percentile"}
You could then use this substitution in an expression, as in this example:
-
#P = :val
Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.
For more information about expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
sourcepub fn expression_attribute_values(
self,
k: impl Into<String>,
v: AttributeValue,
) -> Self
pub fn expression_attribute_values( self, k: impl Into<String>, v: AttributeValue, ) -> Self
Adds a key-value pair to expression_attribute_values
.
To override the contents of this collection use set_expression_attribute_values
.
One or more values that can be substituted in an expression.
Use the : (colon) character in an expression to dereference an attribute value. For example, suppose that you wanted to check whether the value of the ProductStatus
attribute was one of the following:
Available | Backordered | Discontinued
You would first need to specify ExpressionAttributeValues
as follows:
{ ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"} }
You could then use these values in an expression, such as this:
ProductStatus IN (:avail, :back, :disc)
For more information on expression attribute values, see Condition Expressions in the Amazon DynamoDB Developer Guide.
sourcepub fn set_expression_attribute_values(
self,
input: Option<HashMap<String, AttributeValue>>,
) -> Self
pub fn set_expression_attribute_values( self, input: Option<HashMap<String, AttributeValue>>, ) -> Self
One or more values that can be substituted in an expression.
Use the : (colon) character in an expression to dereference an attribute value. For example, suppose that you wanted to check whether the value of the ProductStatus
attribute was one of the following:
Available | Backordered | Discontinued
You would first need to specify ExpressionAttributeValues
as follows:
{ ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"} }
You could then use these values in an expression, such as this:
ProductStatus IN (:avail, :back, :disc)
For more information on expression attribute values, see Condition Expressions in the Amazon DynamoDB Developer Guide.
sourcepub fn get_expression_attribute_values(
&self,
) -> &Option<HashMap<String, AttributeValue>>
pub fn get_expression_attribute_values( &self, ) -> &Option<HashMap<String, AttributeValue>>
One or more values that can be substituted in an expression.
Use the : (colon) character in an expression to dereference an attribute value. For example, suppose that you wanted to check whether the value of the ProductStatus
attribute was one of the following:
Available | Backordered | Discontinued
You would first need to specify ExpressionAttributeValues
as follows:
{ ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"} }
You could then use these values in an expression, such as this:
ProductStatus IN (:avail, :back, :disc)
For more information on expression attribute values, see Condition Expressions in the Amazon DynamoDB Developer Guide.
sourcepub fn return_values_on_condition_check_failure(
self,
input: ReturnValuesOnConditionCheckFailure,
) -> Self
pub fn return_values_on_condition_check_failure( self, input: ReturnValuesOnConditionCheckFailure, ) -> Self
An optional parameter that returns the item attributes for an UpdateItem
operation that failed a condition check.
There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.
sourcepub fn set_return_values_on_condition_check_failure(
self,
input: Option<ReturnValuesOnConditionCheckFailure>,
) -> Self
pub fn set_return_values_on_condition_check_failure( self, input: Option<ReturnValuesOnConditionCheckFailure>, ) -> Self
An optional parameter that returns the item attributes for an UpdateItem
operation that failed a condition check.
There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.
sourcepub fn get_return_values_on_condition_check_failure(
&self,
) -> &Option<ReturnValuesOnConditionCheckFailure>
pub fn get_return_values_on_condition_check_failure( &self, ) -> &Option<ReturnValuesOnConditionCheckFailure>
An optional parameter that returns the item attributes for an UpdateItem
operation that failed a condition check.
There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.
sourcepub fn build(self) -> Result<UpdateItemInput, BuildError>
pub fn build(self) -> Result<UpdateItemInput, BuildError>
Consumes the builder and constructs a UpdateItemInput
.
source§impl UpdateItemInputBuilder
impl UpdateItemInputBuilder
sourcepub async fn send_with(
self,
client: &Client,
) -> Result<UpdateItemOutput, SdkError<UpdateItemError, HttpResponse>>
pub async fn send_with( self, client: &Client, ) -> Result<UpdateItemOutput, SdkError<UpdateItemError, HttpResponse>>
Sends a request with this input using the given client.
Trait Implementations§
source§impl Clone for UpdateItemInputBuilder
impl Clone for UpdateItemInputBuilder
source§fn clone(&self) -> UpdateItemInputBuilder
fn clone(&self) -> UpdateItemInputBuilder
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for UpdateItemInputBuilder
impl Debug for UpdateItemInputBuilder
source§impl Default for UpdateItemInputBuilder
impl Default for UpdateItemInputBuilder
source§fn default() -> UpdateItemInputBuilder
fn default() -> UpdateItemInputBuilder
source§impl PartialEq for UpdateItemInputBuilder
impl PartialEq for UpdateItemInputBuilder
source§fn eq(&self, other: &UpdateItemInputBuilder) -> bool
fn eq(&self, other: &UpdateItemInputBuilder) -> bool
self
and other
values to be equal, and is used
by ==
.impl StructuralPartialEq for UpdateItemInputBuilder
Auto Trait Implementations§
impl Freeze for UpdateItemInputBuilder
impl RefUnwindSafe for UpdateItemInputBuilder
impl Send for UpdateItemInputBuilder
impl Sync for UpdateItemInputBuilder
impl Unpin for UpdateItemInputBuilder
impl UnwindSafe for UpdateItemInputBuilder
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