Package google.datastore.v1

The property to aggregate on.

Count

Count of entities that match the query.

The COUNT(*) aggregation function operates on the entire entity so it does not require a field reference.

Fields

up_  
to

Int64Value

Optional. Optional constraint on the maximum number of entities to count.

This provides a way to set an upper bound on the number of entities to scan, limiting latency, and cost.

Unspecified is interpreted as no bound.

If a zero value is provided, a count result of zero should always be expected.

High-Level Example:

 AGGREGATE COUNT_UP_TO(1000) OVER ( SELECT * FROM k );

Requires:

Must be non-negative when present.

Sum

Sum of the values of the requested property.

Only numeric values will be aggregated. All non-numeric values including NULL are skipped.
If the aggregated values contain NaN , returns NaN . Infinity math follows IEEE-754 standards.
If the aggregated value set is empty, returns 0.
Returns a 64-bit integer if all aggregated numbers are integers and the sum result does not overflow. Otherwise, the result is returned as a double. Note that even if all the aggregated values are integers, the result is returned as a double if it cannot fit within a 64-bit signed integer. When this occurs, the returned value will lose precision.
When underflow occurs, floating-point aggregation is non-deterministic. This means that running the same query repeatedly without any changes to the underlying values could produce slightly different results each time. In those cases, values should be stored as integers over floating-point numbers.

Fields

Fields
`property`	`PropertyReference` The property to aggregate on.

property

The property to aggregate on.

AggregationResult

The result of a single bucket from a Datastore aggregation query.

The keys of aggregate_properties are the same for all results in an aggregation query, unlike entity queries which can have different fields present for each result.

Fields

Fields
`aggregate_ properties`	`map<string, Value >` The result of the aggregation functions, ex: `COUNT(*) AS total_entities` . The key is the `alias` assigned to the aggregation function on input and the size of this map equals the number of aggregation functions in the query.

aggregate_  
properties

map<string, Value >

The result of the aggregation functions, ex: COUNT(*) AS total_entities .

The key is the alias assigned to the aggregation function on input and the size of this map equals the number of aggregation functions in the query.

AggregationResultBatch

A batch of aggregation results produced by an aggregation query.

Fields

Fields
`aggregation_ results[]`	`AggregationResult` The aggregation results for this batch.
`more_ results`	`MoreResultsType` The state of the query after the current batch. Only COUNT(*) aggregations are supported in the initial launch. Therefore, expected result type is limited to `NO_MORE_RESULTS` .
`read_ time`	`Timestamp` Read timestamp this batch was returned from. In a single transaction, subsequent query result batches for the same query can have a greater timestamp. Each batch's read timestamp is valid for all preceding batches.

aggregation_  
results[]

AggregationResult

The aggregation results for this batch.

more_  
results

MoreResultsType

The state of the query after the current batch. Only COUNT(*) aggregations are supported in the initial launch. Therefore, expected result type is limited to NO_MORE_RESULTS .

read_  
time

Read timestamp this batch was returned from.

In a single transaction, subsequent query result batches for the same query can have a greater timestamp. Each batch's read timestamp is valid for all preceding batches.

AllocateIdsRequest

The request for Datastore.AllocateIds .

Fields

project_  
id

string

Required. The ID of the project against which to make the request.

database_  
id

string

The ID of the database against which to make the request.

'(default)' is not allowed; please use empty string '' to refer the default database.

keys[]

Key

Required. A list of keys with incomplete key paths for which to allocate IDs. No key may be reserved/read-only.

AllocateIdsResponse

The response for Datastore.AllocateIds .

Fields

Fields
`keys[]`	`Key` The keys specified in the request (in the same order), each with its key path completed with a newly allocated ID.

keys[]

Key

The keys specified in the request (in the same order), each with its key path completed with a newly allocated ID.

ArrayValue

An array value.

Fields

Fields
`values[]`	`Value` Values in the array. The order of values in an array is preserved as long as all values have identical settings for 'exclude_from_indexes'.

values[]

Values in the array. The order of values in an array is preserved as long as all values have identical settings for 'exclude_from_indexes'.

BeginTransactionRequest

The request for Datastore.BeginTransaction .

Fields

project_  
id

string

Required. The ID of the project against which to make the request.

database_  
id

string

The ID of the database against which to make the request.

'(default)' is not allowed; please use empty string '' to refer the default database.

transaction_  
options

TransactionOptions

Options for a new transaction.

BeginTransactionResponse

The response for Datastore.BeginTransaction .

Fields

Fields
`transaction`	`bytes` The transaction identifier (always present).

transaction

bytes

The transaction identifier (always present).

CommitRequest

The request for Datastore.Commit .

Fields

project_  
id

string

Required. The ID of the project against which to make the request.

database_  
id

string

The ID of the database against which to make the request.

'(default)' is not allowed; please use empty string '' to refer the default database.

mode

Mode

The type of commit to perform. Defaults to TRANSACTIONAL .

mutations[]

Mutation

The mutations to perform.

When mode is TRANSACTIONAL , mutations affecting a single entity are applied in order. The following sequences of mutations affecting a single entity are not permitted in a single Commit request:

insert followed by insert
update followed by insert
upsert followed by insert
delete followed by update

When mode is NON_TRANSACTIONAL , no two mutations may affect a single entity.

Union field transaction_selector . Must be set when mode is TRANSACTIONAL . transaction_selector can be only one of the following:

transaction

bytes

The identifier of the transaction associated with the commit. A transaction identifier is returned by a call to Datastore.BeginTransaction .

single_  
use_  
transaction

TransactionOptions

Options for beginning a new transaction for this request. The transaction is committed when the request completes. If specified, TransactionOptions.mode must be TransactionOptions.ReadWrite .

Mode

The modes available for commits.

Enums
`MODE_UNSPECIFIED`	Unspecified. This value must not be used.
`TRANSACTIONAL`	Transactional: The mutations are either all applied, or none are applied. Learn about transactions here .
`NON_TRANSACTIONAL`	Non-transactional: The mutations may not apply as all or none.

CommitResponse

The response for Datastore.Commit .

Fields

Fields
`mutation_ results[]`	`MutationResult` The result of performing the mutations. The i-th mutation result corresponds to the i-th mutation in the request.
`index_ updates`	`int32` The number of index entries updated during the commit, or zero if none were updated.
`commit_ time`	`Timestamp` The transaction commit timestamp. Not set for non-transactional commits.

mutation_  
results[]

MutationResult

The result of performing the mutations. The i-th mutation result corresponds to the i-th mutation in the request.

index_  
updates

int32

The number of index entries updated during the commit, or zero if none were updated.

commit_  
time

The transaction commit timestamp. Not set for non-transactional commits.

CompositeFilter

A filter that merges multiple other filters using the given operator.

Fields

op

Operator

The operator for combining multiple filters.

filters[]

Filter

The list of filters to combine.

Requires:

At least one filter is present.

Operator

A composite filter operator.

Enums
`OPERATOR_UNSPECIFIED`	Unspecified. This value must not be used.
`AND`	The results are required to satisfy each of the combined filters.
`OR`	Documents are required to satisfy at least one of the combined filters.

Entity

A Datastore data object.

Must not exceed 1 MiB - 4 bytes.

Fields

Fields
`key`	`Key` The entity's key. An entity must have a key, unless otherwise documented (for example, an entity in `Value.entity_value` may have no key). An entity's kind is its key path's last element's kind, or null if it has no key.
`properties`	`map<string, Value >` The entity's properties. The map's keys are property names. A property name matching regex `__.*__` is reserved. A reserved property name is forbidden in certain documented contexts. The map keys, represented as UTF-8, must not exceed 1,500 bytes and cannot be empty.

key

Key

The entity's key.

An entity must have a key, unless otherwise documented (for example, an entity in Value.entity_value may have no key). An entity's kind is its key path's last element's kind, or null if it has no key.

properties

map<string, Value >

The entity's properties. The map's keys are property names. A property name matching regex __.*__ is reserved. A reserved property name is forbidden in certain documented contexts. The map keys, represented as UTF-8, must not exceed 1,500 bytes and cannot be empty.

EntityResult

The result of fetching an entity from Datastore.

Fields
`entity`	`Entity` The resulting entity.
`version`	`int64` The version of the entity, a strictly positive number that monotonically increases with changes to the entity. This field is set for `FULL` entity results. For `missing` entities in `LookupResponse` , this is the version of the snapshot that was used to look up the entity, and it is always set except for eventually consistent reads.
`create_ time`	`Timestamp` The time at which the entity was created. This field is set for `FULL` entity results. If this entity is missing, this field will not be set.
`update_ time`	`Timestamp` The time at which the entity was last changed. This field is set for `FULL` entity results. If this entity is missing, this field will not be set.
`cursor`	`bytes` A cursor that points to the position after the result entity. Set only when the `EntityResult` is part of a `QueryResultBatch` message.

ResultType

Specifies what data the 'entity' field contains. A ResultType is either implied (for example, in LookupResponse.missing from datastore.proto , it is always KEY_ONLY ) or specified by context (for example, in message QueryResultBatch , field entity_result_type specifies a ResultType for all the values in field entity_results ).

Enums
`RESULT_TYPE_UNSPECIFIED`	Unspecified. This value is never used.
`FULL`	The key and properties.
`PROJECTION`	A projected subset of properties. The entity may have no key.
`KEY_ONLY`	Only the key.

ExecutionStats

Execution statistics for the query.

Fields
`results_ returned`	`int64` Total number of results returned, including documents, projections, aggregation results, keys.
`execution_ duration`	`Duration` Total time to execute the query in the backend.
`read_ operations`	`int64` Total billable read operations.
`debug_ stats`	`Struct` Debugging statistics from the execution of the query. Note that the debugging stats are subject to change as Firestore evolves. It could include: { "indexes_entries_scanned": "1000", "documents_scanned": "20", "billing_details" : { "documents_billable": "20", "index_entries_billable": "1000", "min_query_cost": "0" } }

ExplainMetrics

Explain metrics for the query.

Fields

Fields
`plan_ summary`	`PlanSummary` Planning phase information for the query.
`execution_ stats`	`ExecutionStats` Aggregated stats from the execution of the query. Only present when `ExplainOptions.analyze` is set to true.

plan_  
summary

PlanSummary

Planning phase information for the query.

execution_  
stats

ExecutionStats

Aggregated stats from the execution of the query. Only present when ExplainOptions.analyze is set to true.

ExplainOptions

Explain options for the query.

Fields

Fields
`analyze`	`bool` Optional. Whether to execute this query. When false (the default), the query will be planned, returning only metrics from the planning stages. When true, the query will be planned and executed, returning the full query results along with both planning and execution stage metrics.

analyze

bool

Optional. Whether to execute this query.

When false (the default), the query will be planned, returning only metrics from the planning stages.

When true, the query will be planned and executed, returning the full query results along with both planning and execution stage metrics.

Filter

A holder for any type of filter.

Fields

Union field filter_type . The type of filter. filter_type can be only one of the following:

composite_  
filter

CompositeFilter

A composite filter.

property_  
filter

PropertyFilter

A filter on a property.

GqlQuery

A GQL query .

Fields
`query_ string`	`string` A string of the format described here .
`allow_ literals`	`bool` When false, the query string must not contain any literals and instead must bind all values. For example, `SELECT * FROM Kind WHERE a = 'string literal'` is not allowed, while `SELECT * FROM Kind WHERE a = @value` is.
`named_ bindings`	`map<string, GqlQueryParameter >` For each non-reserved named binding site in the query string, there must be a named parameter with that name, but not necessarily the inverse. Key must match regex `[A-Za-z_$][A-Za-z_$0-9]` , must not match regex `__.__` , and must not be `""` .
`positional_ bindings[]`	`GqlQueryParameter` Numbered binding site @1 references the first numbered parameter, effectively using 1-based indexing, rather than the usual 0. For each binding site numbered i in `query_string` , there must be an i-th numbered parameter. The inverse must also be true.

GqlQueryParameter

A binding parameter for a GQL query.

Fields

Union field parameter_type . The type of parameter. parameter_type can be only one of the following:

value

ConflictResolutionStrategy

A value parameter.

cursor

bytes

A query cursor. Query cursors are returned in query result batches.

Key

A unique identifier for an entity. If a key's partition ID or any of its path kinds or names are reserved/read-only, the key is reserved/read-only. A reserved/read-only key is forbidden in certain documented contexts.

Fields

Fields
`partition_ id`	`PartitionId` Entities are partitioned into subsets, currently identified by a project ID and namespace ID. Queries are scoped to a single partition.
`path[]`	`PathElement` The entity path. An entity path consists of one or more elements composed of a kind and a string or numerical identifier, which identify entities. The first element identifies a root entity , the second element identifies a child of the root entity, the third element identifies a child of the second entity, and so forth. The entities identified by all prefixes of the path are called the element's ancestors . An entity path is always fully complete: all of the entity's ancestors are required to be in the path along with the entity identifier itself. The only exception is that in some documented cases, the identifier in the last path element (for the entity) itself may be omitted. For example, the last path element of the key of `Mutation.insert` may have no identifier. A path can never be empty, and a path can have at most 100 elements.

partition_  
id

PartitionId

Entities are partitioned into subsets, currently identified by a project ID and namespace ID. Queries are scoped to a single partition.

path[]

PathElement

The entity path. An entity path consists of one or more elements composed of a kind and a string or numerical identifier, which identify entities. The first element identifies a root entity , the second element identifies a child of the root entity, the third element identifies a child of the second entity, and so forth. The entities identified by all prefixes of the path are called the element's ancestors .

An entity path is always fully complete: all of the entity's ancestors are required to be in the path along with the entity identifier itself. The only exception is that in some documented cases, the identifier in the last path element (for the entity) itself may be omitted. For example, the last path element of the key of Mutation.insert may have no identifier.

A path can never be empty, and a path can have at most 100 elements.

PathElement

A (kind, ID/name) pair used to construct a key path.

If either name or ID is set, the element is complete. If neither is set, the element is incomplete.

Fields

kind

string

The kind of the entity.

A kind matching regex __.*__ is reserved/read-only. A kind must not contain more than 1500 bytes when UTF-8 encoded. Cannot be "" .

Must be valid UTF-8 bytes. Legacy values that are not valid UTF-8 are encoded as __bytes<X>__ where <X> is the base-64 encoding of the bytes.

Union field id_type . The type of ID. id_type can be only one of the following:

id

int64

The auto-allocated ID of the entity.

Never equal to zero. Values less than zero are discouraged and may not be supported in the future.

name

string

The name of the entity.

A name matching regex __.*__ is reserved/read-only. A name must not be more than 1500 bytes when UTF-8 encoded. Cannot be "" .

Must be valid UTF-8 bytes. Legacy values that are not valid UTF-8 are encoded as __bytes<X>__ where <X> is the base-64 encoding of the bytes.

KindExpression

A representation of a kind.

Fields

Fields
`name`	`string` The name of the kind.

name

string

The name of the kind.

LookupRequest

The request for Datastore.Lookup .

Fields
`project_ id`	`string` Required. The ID of the project against which to make the request.
`database_ id`	`string` The ID of the database against which to make the request. '(default)' is not allowed; please use empty string '' to refer the default database.
`read_ options`	`ReadOptions` The options for this lookup request.
`keys[]`	`Key` Required. Keys of entities to look up.
`property_ mask`	`PropertyMask` The properties to return. Defaults to returning all properties. If this field is set and an entity has a property not referenced in the mask, it will be absent from [LookupResponse.found.entity.properties][]. The entity's key is always returned.

LookupResponse

The response for Datastore.Lookup .

Fields
`found[]`	`EntityResult` Entities found as `ResultType.FULL` entities. The order of results in this field is undefined and has no relation to the order of the keys in the input.
`missing[]`	`EntityResult` Entities not found as `ResultType.KEY_ONLY` entities. The order of results in this field is undefined and has no relation to the order of the keys in the input.
`deferred[]`	`Key` A list of keys that were not looked up due to resource constraints. The order of results in this field is undefined and has no relation to the order of the keys in the input.
`transaction`	`bytes` The identifier of the transaction that was started as part of this Lookup request. Set only when `ReadOptions.new_transaction` was set in `LookupRequest.read_options` .
`read_ time`	`Timestamp` The time at which these entities were read or found missing.

Mutation

A mutation to apply to an entity.

Fields

conflict_  
resolution_  
strategy

The strategy to use when a conflict is detected. Defaults to SERVER_VALUE . If this is set, then conflict_detection_strategy must also be set.

property_  
mask

PropertyMask

The properties to write in this mutation. None of the properties in the mask may have a reserved name, except for __key__ . This field is ignored for delete .

If the entity already exists, only properties referenced in the mask are updated, others are left untouched. Properties referenced in the mask but not in the entity are deleted.

property_  
transforms[]

PropertyTransform

Optional. The transforms to perform on the entity.

This field can be set only when the operation is insert , update , or upsert . If present, the transforms are be applied to the entity regardless of the property mask, in order, after the operation.

Union field operation . The mutation operation.

For insert , update , and upsert : - The entity's key must not be reserved/read-only. - No property in the entity may have a reserved name, not even a property in an entity in a value. - No value in the entity may have meaning 18, not even a value in an entity in another value. operation can be only one of the following:

insert

The entity to insert. The entity must not already exist. The entity key's final path element may be incomplete.

update

The entity to update. The entity must already exist. Must have a complete key path.

upsert

The entity to upsert. The entity may or may not already exist. The entity key's final path element may be incomplete.

delete

Key

The key of the entity to delete. The entity may or may not already exist. Must have a complete key path and must not be reserved/read-only.

Union field conflict_detection_strategy . When set, the server will detect whether or not this mutation conflicts with the current version of the entity on the server. Conflicting mutations are not applied, and are marked as such in MutationResult. conflict_detection_strategy can be only one of the following:

base_  
version

int64

The version of the entity that this mutation is being applied to. If this does not match the current version on the server, the mutation conflicts.

update_  
time

The update time of the entity that this mutation is being applied to. If this does not match the current update time on the server, the mutation conflicts.

ConflictResolutionStrategy

The possible ways to resolve a conflict detected in a mutation.

Enums
`STRATEGY_UNSPECIFIED`	Unspecified. Defaults to `SERVER_VALUE` .
`SERVER_VALUE`	The server entity is kept.
`FAIL`	The whole commit request fails.

MutationResult

The result of applying a mutation.

Fields
`key`	`Key` The automatically allocated key. Set only when the mutation allocated a key.
`version`	`int64` The version of the entity on the server after processing the mutation. If the mutation doesn't change anything on the server, then the version will be the version of the current entity or, if no entity is present, a version that is strictly greater than the version of any previous entity and less than the version of any possible future entity.
`create_ time`	`Timestamp` The create time of the entity. This field will not be set after a 'delete'.
`update_ time`	`Timestamp` The update time of the entity on the server after processing the mutation. If the mutation doesn't change anything on the server, then the timestamp will be the update timestamp of the current entity. This field will not be set after a 'delete'.
`conflict_ detected`	`bool` Whether a conflict was detected for this mutation. Always false when a conflict detection strategy field is not set in the mutation.
`transform_ results[]`	`Value` The results of applying each `PropertyTransform` , in the same order of the request.

PartitionId

A partition ID identifies a grouping of entities. The grouping is always by project and namespace, however the namespace ID may be empty.

A partition ID contains several dimensions: project ID and namespace ID.

Partition dimensions:

May be "" .
Must be valid UTF-8 bytes.
Must have values that match regex [A-Za-z\d\.\-_]{1,100} If the value of any dimension matches regex __.*__ , the partition is reserved/read-only. A reserved/read-only partition ID is forbidden in certain documented contexts.

Foreign partition IDs (in which the project ID does not match the context project ID ) are discouraged. Reads and writes of foreign partition IDs may fail if the project is not in an active state.

Fields

Fields
`project_ id`	`string` The ID of the project to which the entities belong.
`database_ id`	`string` If not empty, the ID of the database to which the entities belong.
`namespace_ id`	`string` If not empty, the ID of the namespace to which the entities belong.

project_  
id

string

The ID of the project to which the entities belong.

database_  
id

string

If not empty, the ID of the database to which the entities belong.

namespace_  
id

string

If not empty, the ID of the namespace to which the entities belong.

PlanSummary

Planning phase information for the query.

Fields

Fields
`indexes_ used[]`	`Struct` The indexes selected for the query. For example: [ {"query_scope": "Collection", "properties": "(foo ASC, nameASC)"}, {"query_scope": "Collection", "properties": "(bar ASC, nameASC)"} ]

indexes_  
used[]

Struct

The indexes selected for the query. For example: [ {"query_scope": "Collection", "properties": "(foo ASC, nameASC)"}, {"query_scope": "Collection", "properties": "(bar ASC, nameASC)"} ]

Projection

A representation of a property in a projection.

Fields

Fields
`property`	`PropertyReference` The property to project.

property

The property to project.

PropertyFilter

A filter on a specific property.

Fields

Fields
`property`	`PropertyReference` The property to filter by.
`op`	`Operator` The operator to filter by.
`value`	`Value` The value to compare the property to.

property

The property to filter by.

op

Operator

The operator to filter by.

value

The value to compare the property to.

Operator

A property filter operator.

Enums

OPERATOR_UNSPECIFIED

Unspecified. This value must not be used.

LESS_THAN

The given property is less than the given value .

Requires:

That property comes first in order_by .

LESS_THAN_OR_EQUAL

The given property is less than or equal to the given value .

Requires:

That property comes first in order_by .

GREATER_THAN

The given property is greater than the given value .

Requires:

That property comes first in order_by .

GREATER_THAN_OR_EQUAL

The given property is greater than or equal to the given value .

Requires:

That property comes first in order_by .

EQUAL

The given property is equal to the given value .

IN

The given property is equal to at least one value in the given array.

Requires:

That value is a non-empty ArrayValue , subject to disjunction limits.
No NOT_IN is in the same query.

NOT_EQUAL

The given property is not equal to the given value .

Requires:

No other NOT_EQUAL or NOT_IN is in the same query.
That property comes first in the order_by .

HAS_ANCESTOR

Limit the result set to the given entity and its descendants.

Requires:

That value is an entity key.
All evaluated disjunctions must have the same HAS_ANCESTOR filter.

NOT_IN

The value of the property is not in the given array.

Requires:

That value is a non-empty ArrayValue with at most 10 values.
No other OR , IN , NOT_IN , NOT_EQUAL is in the same query.
That field comes first in the order_by .

PropertyMask

The set of arbitrarily nested property paths used to restrict an operation to only a subset of properties in an entity.

Fields

Fields
`paths[]`	`string` The paths to the properties covered by this mask. A path is a list of property names separated by dots ( `.` ), for example `foo.bar` means the property `bar` inside the entity property `foo` inside the entity associated with this path. If a property name contains a dot `.` or a backslash `\` , then that name must be escaped. A path must not be empty, and may not reference a value inside an `array value` .

paths[]

string

The paths to the properties covered by this mask.

A path is a list of property names separated by dots ( . ), for example foo.bar means the property bar inside the entity property foo inside the entity associated with this path.

If a property name contains a dot . or a backslash \ , then that name must be escaped.

A path must not be empty, and may not reference a value inside an array value .

PropertyOrder

The desired order for a specific property.

Fields

Fields
`property`	`PropertyReference` The property to order by.
`direction`	`Direction` The direction to order by. Defaults to `ASCENDING` .

property

The property to order by.

direction

Direction

The direction to order by. Defaults to ASCENDING .

Direction

The sort direction.

Enums
`DIRECTION_UNSPECIFIED`	Unspecified. This value must not be used.
`ASCENDING`	Ascending.
`DESCENDING`	Descending.

PropertyReference

A reference to a property relative to the kind expressions.

Fields

name

string

A reference to a property.

Requires:

MUST be a dot-delimited ( . ) string of segments, where each segment conforms to entity property name limitations.

PropertyTransform

A transformation of an entity property.

Fields

property

string

Optional. The name of the property.

Property paths (a list of property names separated by dots ( . )) may be used to refer to properties inside entity values. For example foo.bar means the property bar inside the entity property foo .

If a property name contains a dot . or a backlslash \ , then that name must be escaped.

Union field transform_type . The transformation to apply to the property. transform_type can be only one of the following:

set_  
to_  
server_  
value

ServerValue

Sets the property to the given server value.

increment

Adds the given value to the property's current value.

This must be an integer or a double value. If the property is not an integer or double, or if the property does not yet exist, the transformation will set the property to the given value. If either of the given value or the current property value are doubles, both values will be interpreted as doubles. Double arithmetic and representation of double values follows IEEE 754 semantics. If there is positive/negative integer overflow, the property is resolved to the largest magnitude positive/negative integer.

maximum

Sets the property to the maximum of its current value and the given value.

This must be an integer or a double value. If the property is not an integer or double, or if the property does not yet exist, the transformation will set the property to the given value. If a maximum operation is applied where the property and the input value are of mixed types (that is - one is an integer and one is a double) the property takes on the type of the larger operand. If the operands are equivalent (e.g. 3 and 3.0), the property does not change. 0, 0.0, and -0.0 are all zero. The maximum of a zero stored value and zero input value is always the stored value. The maximum of any numeric value x and NaN is NaN.

minimum

Sets the property to the minimum of its current value and the given value.

This must be an integer or a double value. If the property is not an integer or double, or if the property does not yet exist, the transformation will set the property to the input value. If a minimum operation is applied where the property and the input value are of mixed types (that is - one is an integer and one is a double) the property takes on the type of the smaller operand. If the operands are equivalent (e.g. 3 and 3.0), the property does not change. 0, 0.0, and -0.0 are all zero. The minimum of a zero stored value and zero input value is always the stored value. The minimum of any numeric value x and NaN is NaN.

append_  
missing_  
elements

ArrayValue

Appends the given elements in order if they are not already present in the current property value. If the property is not an array, or if the property does not yet exist, it is first set to the empty array.

Equivalent numbers of different types (e.g. 3L and 3.0) are considered equal when checking if a value is missing. NaN is equal to NaN, and the null value is equal to the null value. If the input contains multiple equivalent values, only the first will be considered.

The corresponding transform result will be the null value.

remove_  
all_  
from_  
array

ArrayValue

Removes all of the given elements from the array in the property. If the property is not an array, or if the property does not yet exist, it is set to the empty array.

Equivalent numbers of different types (e.g. 3L and 3.0) are considered equal when deciding whether an element should be removed. NaN is equal to NaN, and the null value is equal to the null value. This will remove all equivalent values if there are duplicates.

The corresponding transform result will be the null value.

ServerValue

A value that is calculated by the server.

Enums
`SERVER_VALUE_UNSPECIFIED`	Unspecified. This value must not be used.
`REQUEST_TIME`	The time at which the server processed the request, with millisecond precision. If used on multiple properties (same or different entities) in a transaction, all the properties will get the same server timestamp.

Query

A query for entities.

Fields

projection[]

Projection

The projection to return. Defaults to returning all properties.

kind[]

KindExpression

The kinds to query (if empty, returns entities of all kinds). Currently at most 1 kind may be specified.

filter

Filter

The filter to apply.

order[]

PropertyOrder

The order to apply to the query results (if empty, order is unspecified).

distinct_  
on[]

The properties to make distinct. The query results will contain the first result for each distinct combination of values for the given properties (if empty, all results are returned).

Requires:

If order is specified, the set of distinct on properties must appear before the non-distinct on properties in order .

start_  
cursor

bytes

A starting point for the query results. Query cursors are returned in query result batches and can only be used to continue the same query .

end_  
cursor

bytes

An ending point for the query results. Query cursors are returned in query result batches and can only be used to limit the same query .

offset

int32

The number of results to skip. Applies before limit, but after all other constraints. Optional. Must be >= 0 if specified.

limit

Int32Value

The maximum number of results to return. Applies after all other constraints. Optional. Unspecified is interpreted as no limit. Must be >= 0 if specified.

QueryResultBatch

A batch of results produced by a query.

Fields
`skipped_ results`	`int32` The number of results skipped, typically because of an offset.
`skipped_ cursor`	`bytes` A cursor that points to the position after the last skipped result. Will be set when `skipped_results` != 0.
`entity_ result_ type`	`ResultType` The result type for every entity in `entity_results` .
`entity_ results[]`	`EntityResult` The results for this batch.
`end_ cursor`	`bytes` A cursor that points to the position after the last result in the batch.
`more_ results`	`MoreResultsType` The state of the query after the current batch.
`snapshot_ version`	`int64` The version number of the snapshot this batch was returned from. This applies to the range of results from the query's `start_cursor` (or the beginning of the query if no cursor was given) to this batch's `end_cursor` (not the query's `end_cursor` ). In a single transaction, subsequent query result batches for the same query can have a greater snapshot version number. Each batch's snapshot version is valid for all preceding batches. The value will be zero for eventually consistent queries.
`read_ time`	`Timestamp` Read timestamp this batch was returned from. This applies to the range of results from the query's `start_cursor` (or the beginning of the query if no cursor was given) to this batch's `end_cursor` (not the query's `end_cursor` ). In a single transaction, subsequent query result batches for the same query can have a greater timestamp. Each batch's read timestamp is valid for all preceding batches. This value will not be set for eventually consistent queries in Cloud Datastore.

MoreResultsType

The possible values for the more_results field.

Enums
`MORE_RESULTS_TYPE_UNSPECIFIED`	Unspecified. This value is never used.
`NOT_FINISHED`	There may be additional batches to fetch from this query.
`MORE_RESULTS_AFTER_LIMIT`	The query is finished, but there may be more results after the limit.
`MORE_RESULTS_AFTER_CURSOR`	The query is finished, but there may be more results after the end cursor.
`NO_MORE_RESULTS`	The query is finished, and there are no more results.

ReadOptions

The options shared by read requests.

Fields

Union field consistency_type . For Cloud Firestore in Datastore mode, if you don't specify read_consistency then all lookups and queries default to read_consistency = STRONG . Note that, in Cloud Datastore, global queries defaulted to read_consistency = EVENTUAL .

Explicitly setting read_consistency = EVENTUAL will result in eventually consistent lookups and queries. consistency_type can be only one of the following:

read_  
consistency

ReadConsistency

The non-transactional read consistency to use.

transaction

bytes

The identifier of the transaction in which to read. A transaction identifier is returned by a call to Datastore.BeginTransaction .

new_  
transaction

TransactionOptions

Options for beginning a new transaction for this request.

The new transaction identifier will be returned in the corresponding response as either LookupResponse.transaction or RunQueryResponse.transaction .

read_  
time

Reads entities as they were at the given time. This value is only supported for Cloud Firestore in Datastore mode.

This must be a microsecond precision timestamp within the past one hour, or if Point-in-Time Recovery is enabled, can additionally be a whole minute timestamp within the past 7 days.

ReadConsistency

The possible values for read consistencies.

Enums
`READ_CONSISTENCY_UNSPECIFIED`	Unspecified. This value must not be used.
`STRONG`	Strong consistency.
`EVENTUAL`	Eventual consistency.

ReserveIdsRequest

The request for Datastore.ReserveIds .

Fields

project_  
id

string

Required. The ID of the project against which to make the request.

database_  
id

string

The ID of the database against which to make the request.

'(default)' is not allowed; please use empty string '' to refer the default database.

keys[]

Key

Required. A list of keys with complete key paths whose numeric IDs should not be auto-allocated.

ReserveIdsResponse

This type has no fields.

The response for Datastore.ReserveIds .

RollbackRequest

The request for Datastore.Rollback .

Fields

project_  
id

string

Required. The ID of the project against which to make the request.

database_  
id

string

The ID of the database against which to make the request.

'(default)' is not allowed; please use empty string '' to refer the default database.

transaction

bytes

Required. The transaction identifier, returned by a call to Datastore.BeginTransaction .

RollbackResponse

This type has no fields.

The response for Datastore.Rollback . (an empty message).

RunAggregationQueryRequest

The request for Datastore.RunAggregationQuery .

Fields

project_  
id

string

Required. The ID of the project against which to make the request.

database_  
id

string

The ID of the database against which to make the request.

'(default)' is not allowed; please use empty string '' to refer the default database.

partition_  
id

PartitionId

Entities are partitioned into subsets, identified by a partition ID. Queries are scoped to a single partition. This partition ID is normalized with the standard default context partition ID.

read_  
options

ReadOptions

The options for this query.

explain_  
options

ExplainOptions

Optional. Explain options for the query. If set, additional query statistics will be returned. If not, only query results will be returned.

Union field query_type . The type of query. query_type can be only one of the following:

aggregation_  
query

AggregationQuery

The query to run.

gql_  
query

GqlQuery

The GQL query to run. This query must be an aggregation query.

RunAggregationQueryResponse

The response for Datastore.RunAggregationQuery .

Fields
`batch`	`AggregationResultBatch` A batch of aggregation results. Always present.
`query`	`AggregationQuery` The parsed form of the `GqlQuery` from the request, if it was set.
`transaction`	`bytes` The identifier of the transaction that was started as part of this RunAggregationQuery request. Set only when `ReadOptions.new_transaction` was set in `RunAggregationQueryRequest.read_options` .
`explain_ metrics`	`ExplainMetrics` Query explain metrics. This is only present when the `RunAggregationQueryRequest.explain_options` is provided, and it is sent only once with the last response in the stream.

RunQueryRequest

The request for Datastore.RunQuery .

Fields

project_  
id

string

Required. The ID of the project against which to make the request.

database_  
id

string

The ID of the database against which to make the request.

'(default)' is not allowed; please use empty string '' to refer the default database.

partition_  
id

PartitionId

Entities are partitioned into subsets, identified by a partition ID. Queries are scoped to a single partition. This partition ID is normalized with the standard default context partition ID.

read_  
options

ReadOptions

The options for this query.

property_  
mask

PropertyMask

The properties to return. This field must not be set for a projection query.

See LookupRequest.property_mask .

explain_  
options

ExplainOptions

Optional. Explain options for the query. If set, additional query statistics will be returned. If not, only query results will be returned.

Union field query_type . The type of query. query_type can be only one of the following:

query

Query

The query to run.

gql_  
query

GqlQuery

The GQL query to run. This query must be a non-aggregation query.

RunQueryResponse

The response for Datastore.RunQuery .

Fields
`batch`	`QueryResultBatch` A batch of query results (always present).
`query`	`Query` The parsed form of the `GqlQuery` from the request, if it was set.
`transaction`	`bytes` The identifier of the transaction that was started as part of this RunQuery request. Set only when `ReadOptions.new_transaction` was set in `RunQueryRequest.read_options` .
`explain_ metrics`	`ExplainMetrics` Query explain metrics. This is only present when the `RunQueryRequest.explain_options` is provided, and it is sent only once with the last response in the stream.

TransactionOptions

Options for beginning a new transaction.

Transactions can be created explicitly with calls to Datastore.BeginTransaction or implicitly by setting ReadOptions.new_transaction in read requests.

Fields

Union field mode . The mode of the transaction, indicating whether write operations are supported. mode can be only one of the following:

read_  
write

ReadWrite

The transaction should allow both reads and writes.

read_  
only

ReadOnly

The transaction should only allow reads.

ReadOnly

Options specific to read-only transactions.

Fields

Fields
`read_ time`	`Timestamp` Reads entities at the given time. This must be a microsecond precision timestamp within the past one hour, or if Point-in-Time Recovery is enabled, can additionally be a whole minute timestamp within the past 7 days.

read_  
time

Reads entities at the given time.

This must be a microsecond precision timestamp within the past one hour, or if Point-in-Time Recovery is enabled, can additionally be a whole minute timestamp within the past 7 days.

ReadWrite

Options specific to read / write transactions.

Fields

Fields
`previous_ transaction`	`bytes` The transaction identifier of the transaction being retried.

previous_  
transaction

bytes

The transaction identifier of the transaction being retried.

Value

A message that can hold any of the supported value types and associated metadata.

Fields

meaning

int32

The meaning field should only be populated for backwards compatibility.

exclude_  
from_  
indexes

bool

If the value should be excluded from all indexes including those defined explicitly.

Union field value_type . Must have a value set. value_type can be only one of the following:

null_  
value

NullValue

A null value.

boolean_  
value

bool

A boolean value.

integer_  
value

int64

An integer value.

double_  
value

double

A double value.

timestamp_  
value

A timestamp value. When stored in the Datastore, precise only to microseconds; any additional precision is rounded down.

key_  
value

Key

A key value.

string_  
value

string

A UTF-8 encoded string value. When exclude_from_indexes is false (it is indexed) , may have at most 1500 bytes. Otherwise, may be set to at most 1,000,000 bytes.

blob_  
value

bytes

A blob value. May have at most 1,000,000 bytes. When exclude_from_indexes is false, may have at most 1500 bytes. In JSON requests, must be base64-encoded.

geo_  
point_  
value

LatLng

A geo point value representing a point on the surface of Earth.

entity_  
value