Funzioni di confronto

Funzioni di confronto

Nome Descrizione
EQUAL Confronto di uguaglianza
GREATER_THAN Confronto maggiore di
GREATER_THAN_OR_EQUAL Confronto maggiore o uguale a
LESS_THAN Confronto con il segno "minore di"
LESS_THAN_OR_EQUAL Confronto minore o uguale
NOT_EQUAL Confronto diverso da

EQUAL

Sintassi:

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

Esempi:

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

Descrizione:

Restituisce TRUE se x e y sono uguali, altrimenti restituisce FALSE.

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

MAGGIORE_DI

Sintassi:

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

Descrizione:

Restituisce TRUE se x è maggiore di y, altrimenti restituisce FALSE.

Se x e y non sono comparabili, restituisce FALSE.

Esempi:

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

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

MAGGIORE_UGUALE

Sintassi:

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

Descrizione:

Restituisce TRUE se x è maggiore o uguale a y, altrimenti restituisce FALSE.

Se x e y non sono comparabili, restituisce FALSE.

Esempi:

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

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

LESS_THAN

Sintassi:

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

Descrizione:

Restituisce TRUE se x è minore di y, altrimenti restituisce FALSE.

Se x e y non sono comparabili, restituisce FALSE.

Esempi:

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

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

LESS_THAN_OR_EQUAL

Sintassi:

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

Descrizione:

Restituisce TRUE se x è minore o uguale a y, altrimenti restituisce FALSE.

Se x e y non sono comparabili, restituisce FALSE.

Esempi:

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

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

NOT_EQUAL

Sintassi:

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

Descrizione:

Restituisce TRUE se x non è uguale a y, altrimenti restituisce FALSE.

Esempi:

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

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