原生模式下的 Cloud Firestore 企业版现已推出！了解详情。

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Vergleichsfunktionen

Name	Beschreibung
`EQUAL`	Gleichheitsvergleich
`GREATER_THAN`	Vergleich „Größer als“
`GREATER_THAN_OR_EQUAL`	Vergleich „Größer als oder gleich“
`LESS_THAN`	Vergleich „Kleiner als“
`LESS_THAN_OR_EQUAL`	Vergleich „kleiner als oder gleich“
`NOT_EQUAL`	Vergleich „Ist nicht gleich“
`CMP`	Allgemeiner Vergleich

EQUAL

Syntax:

equal(x: ANY, y: ANY) -> BOOLEAN

Beispiele:

`x`	`y`	`equal(x, y)`
1L	1L	`TRUE`
1.0	1L	`TRUE`
-1,0	1L	`FALSE`
NaN	NaN	`TRUE`
`NULL`	`NULL`	`TRUE`
`NULL`	`ABSENT`	`FALSE`

Beschreibung:

Gibt TRUE zurück, wenn x und y gleich sind, andernfalls FALSE.

Node.js

const result = await db.pipeline()
  .collection("books")
  .select(field("rating").equal(5).as("hasPerfectRating"))
  .execute();test.firestore.js

Web

const result = await execute(db.pipeline()
  .collection("books")
  .select(field("rating").equal(5).as("hasPerfectRating"))
);test.firestore.js

Swift

let result = try await db.pipeline()
  .collection("books")
  .select([Field("rating").equal(5).as("hasPerfectRating")])
  .execute()PipelineSnippets.swift

Kotlin

val result = db.pipeline()
    .collection("books")
    .select(field("rating").equal(5).alias("hasPerfectRating"))
    .execute()DocSnippets.kt

Java

Task<Pipeline.Snapshot> result = db.pipeline()
    .collection("books")
    .select(field("rating").equal(5).alias("hasPerfectRating"))
    .execute();DocSnippets.java

Python

from google.cloud.firestore_v1.pipeline_expressions import Field

result = (
    client.pipeline()
    .collection("books")
    .select(Field.of("rating").equal(5).as_("hasPerfectRating"))
    .execute()
)firestore_pipelines.py

Java

Pipeline.Snapshot result =
    firestore
        .pipeline()
        .collection("books")
        .select(equal(field("rating"), 5).as("hasPerfectRating"))
        .execute()
        .get();PipelineSnippets.java

Go

snapshot := client.Pipeline().
	Collection("books").
	Select(firestore.Fields(
		firestore.Equal(firestore.FieldOf("rating"), 5).As("hasPerfectRating"),
	)).
	Execute(ctx)pipeline_snippets_comparison.go

GREATER_THAN

Syntax:

greater_than(x: ANY, y: ANY) -> BOOLEAN

Beschreibung:

Gibt TRUE zurück, wenn x größer als y ist, ansonsten FALSE.

Wenn x und y nicht vergleichbar sind, wird FALSE zurückgegeben.

Beispiele:

`x`	`y`	`greater_than(x, y)`
1L	0,0	`TRUE`
1L	1L	`FALSE`
1L	2L	`FALSE`
"foo"	0L	`FALSE`
0L	"foo"	`FALSE`
NaN	0L	`FALSE`
0L	NaN	`FALSE`
`NULL`	`NULL`	`FALSE`

Node.js

const result = await db.pipeline()
  .collection("books")
  .select(field("rating").greaterThan(4).as("hasHighRating"))
  .execute();test.firestore.js

Web

const result = await execute(db.pipeline()
  .collection("books")
  .select(field("rating").greaterThan(4).as("hasHighRating"))
);test.firestore.js

Swift

let result = try await db.pipeline()
  .collection("books")
  .select([Field("rating").greaterThan(4).as("hasHighRating")])
  .execute()PipelineSnippets.swift

Kotlin

val result = db.pipeline()
    .collection("books")
    .select(field("rating").greaterThan(4).alias("hasHighRating"))
    .execute()DocSnippets.kt

Java

Task<Pipeline.Snapshot> result = db.pipeline()
    .collection("books")
    .select(field("rating").greaterThan(4).alias("hasHighRating"))
    .execute();DocSnippets.java

Python

from google.cloud.firestore_v1.pipeline_expressions import Field

result = (
    client.pipeline()
    .collection("books")
    .select(Field.of("rating").greater_than(4).as_("hasHighRating"))
    .execute()
)firestore_pipelines.py

Java

Pipeline.Snapshot result =
    firestore
        .pipeline()
        .collection("books")
        .select(greaterThan(field("rating"), 4).as("hasHighRating"))
        .execute()
        .get();PipelineSnippets.java

Go

snapshot := client.Pipeline().
	Collection("books").
	Select(firestore.Fields(
		firestore.GreaterThan(firestore.FieldOf("rating"), 4).As("hasHighRating"),
	)).
	Execute(ctx)pipeline_snippets_comparison.go

GREATER_THAN_OR_EQUAL

Syntax:

greater_than_or_equal(x: ANY, y: ANY) -> BOOLEAN

Beschreibung:

Gibt TRUE zurück, wenn x größer oder gleich y ist, andernfalls FALSE.

Wenn x und y nicht vergleichbar sind, wird FALSE zurückgegeben.

Beispiele:

`x`	`y`	`greater_than_or_equal(x, y)`
1L	0,0	`TRUE`
1L	1L	`TRUE`
1L	2L	`FALSE`
"foo"	0L	`FALSE`
0L	"foo"	`FALSE`
NaN	0L	`FALSE`
0L	NaN	`FALSE`
`NULL`	`NULL`	`TRUE`

Node.js

const result = await db.pipeline()
  .collection("books")
  .select(field("published").greaterThanOrEqual(1900).as("publishedIn20thCentury"))
  .execute();test.firestore.js

Web

const result = await execute(db.pipeline()
  .collection("books")
  .select(field("published").greaterThanOrEqual(1900).as("publishedIn20thCentury"))
);test.firestore.js

Swift

let result = try await db.pipeline()
  .collection("books")
  .select([Field("published").greaterThanOrEqual(1900).as("publishedIn20thCentury")])
  .execute()PipelineSnippets.swift

Kotlin

val result = db.pipeline()
    .collection("books")
    .select(field("published").greaterThanOrEqual(1900).alias("publishedIn20thCentury"))
    .execute()DocSnippets.kt

Java

Task<Pipeline.Snapshot> result = db.pipeline()
    .collection("books")
    .select(field("published").greaterThanOrEqual(1900).alias("publishedIn20thCentury"))
    .execute();DocSnippets.java

Python

from google.cloud.firestore_v1.pipeline_expressions import Field

result = (
    client.pipeline()
    .collection("books")
    .select(
        Field.of("published")
        .greater_than_or_equal(1900)
        .as_("publishedIn20thCentury")
    )
    .execute()
)firestore_pipelines.py

Java

Pipeline.Snapshot result =
    firestore
        .pipeline()
        .collection("books")
        .select(greaterThanOrEqual(field("published"), 1900).as("publishedIn20thCentury"))
        .execute()
        .get();PipelineSnippets.java

Go

snapshot := client.Pipeline().
	Collection("books").
	Select(firestore.Fields(
		firestore.GreaterThanOrEqual(firestore.FieldOf("published"), 1900).As("publishedIn20thCentury"),
	)).
	Execute(ctx)pipeline_snippets_comparison.go

LESS_THAN

Syntax:

less_than(x: ANY, y: ANY) -> BOOLEAN

Beschreibung:

Gibt TRUE zurück, wenn x kleiner als y ist, ansonsten FALSE.

Wenn x und y nicht vergleichbar sind, wird FALSE zurückgegeben.

Beispiele:

`x`	`y`	`less_than(x, y)`
1L	0,0	`FALSE`
1L	1L	`FALSE`
1L	2L	`TRUE`
"foo"	0L	`FALSE`
0L	"foo"	`FALSE`
NaN	0L	`FALSE`
0L	NaN	`FALSE`
`NULL`	`NULL`	`FALSE`

Node.js

const result = await db.pipeline()
  .collection("books")
  .select(field("published").lessThan(1923).as("isPublicDomainProbably"))
  .execute();test.firestore.js

Web

const result = await execute(db.pipeline()
  .collection("books")
  .select(field("published").lessThan(1923).as("isPublicDomainProbably"))
);test.firestore.js

Swift

let result = try await db.pipeline()
  .collection("books")
  .select([Field("published").lessThan(1923).as("isPublicDomainProbably")])
  .execute()PipelineSnippets.swift

Kotlin

val result = db.pipeline()
    .collection("books")
    .select(field("published").lessThan(1923).alias("isPublicDomainProbably"))
    .execute()DocSnippets.kt

Java

Task<Pipeline.Snapshot> result = db.pipeline()
    .collection("books")
    .select(field("published").lessThan(1923).alias("isPublicDomainProbably"))
    .execute();DocSnippets.java

Python

from google.cloud.firestore_v1.pipeline_expressions import Field

result = (
    client.pipeline()
    .collection("books")
    .select(Field.of("published").less_than(1923).as_("isPublicDomainProbably"))
    .execute()
)firestore_pipelines.py

Java

Pipeline.Snapshot result =
    firestore
        .pipeline()
        .collection("books")
        .select(lessThan(field("published"), 1923).as("isPublicDomainProbably"))
        .execute()
        .get();PipelineSnippets.java

Go

snapshot := client.Pipeline().
	Collection("books").
	Select(firestore.Fields(
		firestore.LessThan(firestore.FieldOf("published"), 1923).As("isPublicDomainProbably"),
	)).
	Execute(ctx)pipeline_snippets_comparison.go

LESS_THAN_OR_EQUAL

Syntax:

less_than_or_equal(x: ANY, y: ANY) -> BOOLEAN

Beschreibung:

Gibt TRUE zurück, wenn x kleiner oder gleich y ist, andernfalls FALSE.

Wenn x und y nicht vergleichbar sind, wird FALSE zurückgegeben.

Beispiele:

`x`	`y`	`less_than(x, y)`
1L	0,0	`FALSE`
1L	1L	`TRUE`
1L	2L	`TRUE`
"foo"	0L	`FALSE`
0L	"foo"	`FALSE`
NaN	0L	`FALSE`
0L	NaN	`FALSE`
`NULL`	`NULL`	`TRUE`

Node.js

const result = await db.pipeline()
  .collection("books")
  .select(field("rating").lessThanOrEqual(2).as("hasBadRating"))
  .execute();test.firestore.js

Web

const result = await execute(db.pipeline()
  .collection("books")
  .select(field("rating").lessThanOrEqual(2).as("hasBadRating"))
);test.firestore.js

Swift

let result = try await db.pipeline()
  .collection("books")
  .select([Field("rating").lessThanOrEqual(2).as("hasBadRating")])
  .execute()PipelineSnippets.swift

Kotlin

val result = db.pipeline()
    .collection("books")
    .select(field("rating").lessThanOrEqual(2).alias("hasBadRating"))
    .execute()DocSnippets.kt

Java

Task<Pipeline.Snapshot> result = db.pipeline()
    .collection("books")
    .select(field("rating").lessThanOrEqual(2).alias("hasBadRating"))
    .execute();DocSnippets.java

Python

from google.cloud.firestore_v1.pipeline_expressions import Field

result = (
    client.pipeline()
    .collection("books")
    .select(Field.of("rating").less_than_or_equal(2).as_("hasBadRating"))
    .execute()
)firestore_pipelines.py

Java

Pipeline.Snapshot result =
    firestore
        .pipeline()
        .collection("books")
        .select(lessThanOrEqual(field("rating"), 2).as("hasBadRating"))
        .execute()
        .get();PipelineSnippets.java

Go

snapshot := client.Pipeline().
	Collection("books").
	Select(firestore.Fields(
		firestore.LessThanOrEqual(firestore.FieldOf("rating"), 2).As("hasBadRating"),
	)).
	Execute(ctx)pipeline_snippets_comparison.go

NOT_EQUAL

Syntax:

not_equal(x: ANY, y: ANY) -> BOOLEAN

Beschreibung:

Gibt TRUE zurück, wenn x nicht gleich y ist, ansonsten FALSE.

Beispiele:

`x`	`y`	`not_equal(x, y)`
1L	1L	`FALSE`
1.0	1L	`FALSE`
-1,0	1L	`TRUE`
NaN	0L	`TRUE`
NaN	NaN	`FALSE`
`NULL`	`NULL`	`FALSE`
`NULL`	`ABSENT`	`TRUE`

Node.js

const result = await db.pipeline()
  .collection("books")
  .select(field("title").notEqual("1984").as("not1984"))
  .execute();test.firestore.js

Web

const result = await execute(db.pipeline()
  .collection("books")
  .select(field("title").notEqual("1984").as("not1984"))
);test.firestore.js

Swift

let result = try await db.pipeline()
  .collection("books")
  .select([Field("title").notEqual("1984").as("not1984")])
  .execute()PipelineSnippets.swift

Kotlin

val result = db.pipeline()
    .collection("books")
    .select(field("title").notEqual("1984").alias("not1984"))
    .execute()DocSnippets.kt

Java

Task<Pipeline.Snapshot> result = db.pipeline()
    .collection("books")
    .select(field("title").notEqual("1984").alias("not1984"))
    .execute();DocSnippets.java

Python

from google.cloud.firestore_v1.pipeline_expressions import Field

result = (
    client.pipeline()
    .collection("books")
    .select(Field.of("title").not_equal("1984").as_("not1984"))
    .execute()
)firestore_pipelines.py

Java

Pipeline.Snapshot result =
    firestore
        .pipeline()
        .collection("books")
        .select(notEqual(field("title"), "1984").as("not1984"))
        .execute()
        .get();PipelineSnippets.java

Go

snapshot := client.Pipeline().
	Collection("books").
	Select(firestore.Fields(
		firestore.NotEqual(firestore.FieldOf("title"), "1984").As("not1984"),
	)).
	Execute(ctx)pipeline_snippets_comparison.go

CMP

Syntax:

cmp(x: ANY, y: ANY) -> Int64

Beschreibung:

Vergleicht x und y und gibt Folgendes zurück:

1L, wenn x größer als y ist.
-1L, wenn x kleiner als y ist.
Andernfalls 0L.

Im Gegensatz zu anderen Vergleichsfunktionen funktioniert die Funktion cmp(...) typübergreifend und folgt derselben Reihenfolge wie in der Phase sort(...). Informationen dazu, wie Werte typübergreifend sortiert werden, finden Sie unter Werttypsortierung.

Beispiele:

`x`	`y`	`cmp(x, y)`
1L	1L	0L
1.0	1L	0L
-1,0	1L	–1L
42,5D	"foo"	–1L
`NULL`	`NULL`	0L
`NULL`	`ABSENT`	0L

Vergleichsfunktionen Mit Sammlungen den Überblick behalten Sie können Inhalte basierend auf Ihren Einstellungen speichern und kategorisieren.