BigQuery API - Class Google::Cloud::Bigquery::Table::Updater (v1.44.2)

Reference documentation and code samples for the BigQuery API class Google::Cloud::Bigquery::Table::Updater.

Yielded to a block to accumulate changes for a create request. See Dataset#create_table.

Inherits

Methods

#bignumeric

def bignumeric(name, description: nil, mode: :nullable, policy_tags: nil, precision: nil, scale: nil, default_value_expression: nil)

Adds a bignumeric number field to the schema. BIGNUMERIC is a decimal type with fixed precision and scale. Precision is the number of digits that the number contains. Scale is how many of these digits appear after the decimal point. It supports:

Precision: 76.76 (the 77th digit is partial) Scale: 38 Min: -5.7896044618658097711785492504343953926634992332820282019728792003956564819968E+38 Max: 5.7896044618658097711785492504343953926634992332820282019728792003956564819967E+38

This type can represent decimal fractions exactly, and is suitable for financial calculations.

See Schema#bignumeric

Parameters
  • name (String) — The field name. The name must contain only letters ([A-Za-z]), numbers ([0-9]), or underscores (_), and must start with a letter or underscore. The maximum length is 128 characters.
  • description (String) (defaults to: nil) — A description of the field.
  • mode (Symbol) (defaults to: :nullable) — The field's mode. The possible values are :nullable, :required, and :repeated. The default value is :nullable.
  • policy_tags (Array<String>, String) (defaults to: nil) — The policy tag list or single policy tag for the field. Policy tag identifiers are of the form projects/*/locations/*/taxonomies/*/policyTags/*. At most 1 policy tag is currently allowed.
  • precision (Integer) (defaults to: nil) — The precision (maximum number of total digits) for the field. Acceptable values for precision must be: 1 ≤ (precision - scale) ≤ 38. Values for scale must be: 0 ≤ scale ≤ 38. If the scale value is set, the precision value must be set as well.
  • scale (Integer) (defaults to: nil) — The scale (maximum number of digits in the fractional part) for the field. Acceptable values for precision must be: 1 ≤ (precision - scale) ≤ 38. Values for scale must be: 0 ≤ scale ≤ 38. If the scale value is set, the precision value must be set as well.
  • default_value_expression (String) (defaults to: nil) —

    The default value of a field using a SQL expression. It can only be set for top level fields (columns). Use a struct or array expression to specify default value for the entire struct or array. The valid SQL expressions are:

    • Literals for all data types, including STRUCT and ARRAY.
    • The following functions: CURRENT_TIMESTAMP CURRENT_TIME CURRENT_DATE CURRENT_DATETIME GENERATE_UUID RAND SESSION_USER ST_GEOPOINT
    • Struct or array composed with the above allowed functions, for example: "[CURRENT_DATE(), DATE '2020-01-01'"]
Examples 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.bignumeric "total_cost", mode: :required
end

Add field with default value.

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.bignumeric "total_cost", default_value_expression: "1.0e4"
end

#boolean

def boolean(name, description: nil, mode: :nullable, policy_tags: nil, default_value_expression: nil)

Adds a boolean field to the schema.

See Schema#boolean.

Parameters
  • name (String) — The field name. The name must contain only letters ([A-Za-z]), numbers ([0-9]), or underscores (_), and must start with a letter or underscore. The maximum length is 128 characters.
  • description (String) (defaults to: nil) — A description of the field.
  • mode (Symbol) (defaults to: :nullable) — The field's mode. The possible values are :nullable, :required, and :repeated. The default value is :nullable.
  • policy_tags (Array<String>, String) (defaults to: nil) — The policy tag list or single policy tag for the field. Policy tag identifiers are of the form projects/*/locations/*/taxonomies/*/policyTags/*. At most 1 policy tag is currently allowed.
  • default_value_expression (String) (defaults to: nil) —

    The default value of a field using a SQL expression. It can only be set for top level fields (columns). Use a struct or array expression to specify default value for the entire struct or array. The valid SQL expressions are:

    • Literals for all data types, including STRUCT and ARRAY.
    • The following functions: CURRENT_TIMESTAMP CURRENT_TIME CURRENT_DATE CURRENT_DATETIME GENERATE_UUID RAND SESSION_USER ST_GEOPOINT
    • Struct or array composed with the above allowed functions, for example: "[CURRENT_DATE(), DATE '2020-01-01'"]
Examples 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.boolean "active", mode: :required
end

Add field with default value.

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.boolean "active", default_value_expression: "true"
end

#bytes

def bytes(name, description: nil, mode: :nullable, policy_tags: nil, max_length: nil, default_value_expression: nil)

Adds a bytes field to the schema.

See Schema#bytes.

Parameters
  • name (String) — The field name. The name must contain only letters ([A-Za-z]), numbers ([0-9]), or underscores (_), and must start with a letter or underscore. The maximum length is 128 characters.
  • description (String) (defaults to: nil) — A description of the field.
  • mode (Symbol) (defaults to: :nullable) — The field's mode. The possible values are :nullable, :required, and :repeated. The default value is :nullable.
  • policy_tags (Array<String>, String) (defaults to: nil) — The policy tag list or single policy tag for the field. Policy tag identifiers are of the form projects/*/locations/*/taxonomies/*/policyTags/*. At most 1 policy tag is currently allowed.
  • max_length (Integer) (defaults to: nil) — The maximum the maximum number of bytes in the field.
  • default_value_expression (String) (defaults to: nil) —

    The default value of a field using a SQL expression. It can only be set for top level fields (columns). Use a struct or array expression to specify default value for the entire struct or array. The valid SQL expressions are:

    • Literals for all data types, including STRUCT and ARRAY.
    • The following functions: CURRENT_TIMESTAMP CURRENT_TIME CURRENT_DATE CURRENT_DATETIME GENERATE_UUID RAND SESSION_USER ST_GEOPOINT
    • Struct or array composed with the above allowed functions, for example: "[CURRENT_DATE(), DATE '2020-01-01'"]
Examples 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.bytes "avatar", mode: :required
end

Add field with default value.

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.bytes "avatar", default_value_expression: "b'101'"
end

#clustering_fields=

def clustering_fields=(fields)

Sets the list of fields on which data should be clustered.

Only top-level, non-repeated, simple-type fields are supported. When you cluster a table using multiple columns, the order of columns you specify is important. The order of the specified columns determines the sort order of the data.

BigQuery supports clustering for both partitioned and non-partitioned tables.

See #clustering_fields and #clustering_fields=.

Parameter
  • fields (Array<String>) — The clustering fields. Only top-level, non-repeated, simple-type fields are supported.
Example 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |t|
  t.schema do |schema|
    schema.timestamp "dob", mode: :required
    schema.string "first_name", mode: :required
    schema.string "last_name", mode: :required
  end
  t.time_partitioning_type  = "DAY"
  t.time_partitioning_field = "dob"
  t.clustering_fields = ["last_name", "first_name"]
end

#copy

def copy()
Raises
  • (RuntimeError) — not implemented

#copy_job

def copy_job()
Raises
  • (RuntimeError) — not implemented

#data

def data()
Raises
  • (RuntimeError) — not implemented

#date

def date(name, description: nil, mode: :nullable, policy_tags: nil, default_value_expression: nil)

Adds a date field to the schema.

See Schema#date.

Parameters
  • name (String) — The field name. The name must contain only letters ([A-Za-z]), numbers ([0-9]), or underscores (_), and must start with a letter or underscore. The maximum length is 128 characters.
  • description (String) (defaults to: nil) — A description of the field.
  • mode (Symbol) (defaults to: :nullable) — The field's mode. The possible values are :nullable, :required, and :repeated. The default value is :nullable.
  • policy_tags (Array<String>, String) (defaults to: nil) — The policy tag list or single policy tag for the field. Policy tag identifiers are of the form projects/*/locations/*/taxonomies/*/policyTags/*. At most 1 policy tag is currently allowed.
  • default_value_expression (String) (defaults to: nil) —

    The default value of a field using a SQL expression. It can only be set for top level fields (columns). Use a struct or array expression to specify default value for the entire struct or array. The valid SQL expressions are:

    • Literals for all data types, including STRUCT and ARRAY.
    • The following functions: CURRENT_TIMESTAMP CURRENT_TIME CURRENT_DATE CURRENT_DATETIME GENERATE_UUID RAND SESSION_USER ST_GEOPOINT
    • Struct or array composed with the above allowed functions, for example: "[CURRENT_DATE(), DATE '2020-01-01'"]
Examples 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.date "birthday", mode: :required
end

Add field with default value.

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
   schema.date "birthday", default_value_expression: "CURRENT_DATE"
end

#datetime

def datetime(name, description: nil, mode: :nullable, policy_tags: nil, default_value_expression: nil)

Adds a datetime field to the schema.

See Schema#datetime.

Parameters
  • name (String) — The field name. The name must contain only letters ([A-Za-z]), numbers ([0-9]), or underscores (_), and must start with a letter or underscore. The maximum length is 128 characters.
  • description (String) (defaults to: nil) — A description of the field.
  • mode (Symbol) (defaults to: :nullable) — The field's mode. The possible values are :nullable, :required, and :repeated. The default value is :nullable.
  • policy_tags (Array<String>, String) (defaults to: nil) — The policy tag list or single policy tag for the field. Policy tag identifiers are of the form projects/*/locations/*/taxonomies/*/policyTags/*. At most 1 policy tag is currently allowed.
  • default_value_expression (String) (defaults to: nil) —

    The default value of a field using a SQL expression. It can only be set for top level fields (columns). Use a struct or array expression to specify default value for the entire struct or array. The valid SQL expressions are:

    • Literals for all data types, including STRUCT and ARRAY.
    • The following functions: CURRENT_TIMESTAMP CURRENT_TIME CURRENT_DATE CURRENT_DATETIME GENERATE_UUID RAND SESSION_USER ST_GEOPOINT
    • Struct or array composed with the above allowed functions, for example: "[CURRENT_DATE(), DATE '2020-01-01'"]
Examples 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.datetime "target_end", mode: :required
end

Add field with default value.

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.datetime "target_end", default_value_expression: "CURRENT_DATETIME"
end

#delete

def delete()
Raises
  • (RuntimeError) — not implemented

#external

def external()
Raises
  • (RuntimeError) — not implemented

#extract

def extract()
Raises
  • (RuntimeError) — not implemented

#extract_job

def extract_job()
Raises
  • (RuntimeError) — not implemented

#float

def float(name, description: nil, mode: :nullable, policy_tags: nil, default_value_expression: nil)

Adds a floating-point number field to the schema.

See Schema#float.

Parameters
  • name (String) — The field name. The name must contain only letters ([A-Za-z]), numbers ([0-9]), or underscores (_), and must start with a letter or underscore. The maximum length is 128 characters.
  • description (String) (defaults to: nil) — A description of the field.
  • mode (Symbol) (defaults to: :nullable) — The field's mode. The possible values are :nullable, :required, and :repeated. The default value is :nullable.
  • policy_tags (Array<String>, String) (defaults to: nil) — The policy tag list or single policy tag for the field. Policy tag identifiers are of the form projects/*/locations/*/taxonomies/*/policyTags/*. At most 1 policy tag is currently allowed.
  • default_value_expression (String) (defaults to: nil) —

    The default value of a field using a SQL expression. It can only be set for top level fields (columns). Use a struct or array expression to specify default value for the entire struct or array. The valid SQL expressions are:

    • Literals for all data types, including STRUCT and ARRAY.
    • The following functions: CURRENT_TIMESTAMP CURRENT_TIME CURRENT_DATE CURRENT_DATETIME GENERATE_UUID RAND SESSION_USER ST_GEOPOINT
    • Struct or array composed with the above allowed functions, for example: "[CURRENT_DATE(), DATE '2020-01-01'"]
Examples 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.float "price", mode: :required
end

Add field with default value.

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.float "price", default_value_expression: "1.0"
end

#geography

def geography(name, description: nil, mode: :nullable, policy_tags: nil, default_value_expression: nil)

Adds a geography field to the schema.

Parameters
  • name (String) — The field name. The name must contain only letters ([A-Za-z]), numbers ([0-9]), or underscores (_), and must start with a letter or underscore. The maximum length is 128 characters.
  • description (String) (defaults to: nil) — A description of the field.
  • mode (Symbol) (defaults to: :nullable) — The field's mode. The possible values are :nullable, :required, and :repeated. The default value is :nullable.
  • policy_tags (Array<String>, String) (defaults to: nil) — The policy tag list or single policy tag for the field. Policy tag identifiers are of the form projects/*/locations/*/taxonomies/*/policyTags/*. At most 1 policy tag is currently allowed.
  • default_value_expression (String) (defaults to: nil) —

    The default value of a field using a SQL expression. It can only be set for top level fields (columns). Use a struct or array expression to specify default value for the entire struct or array. The valid SQL expressions are:

    • Literals for all data types, including STRUCT and ARRAY.
    • The following functions: CURRENT_TIMESTAMP CURRENT_TIME CURRENT_DATE CURRENT_DATETIME GENERATE_UUID RAND SESSION_USER ST_GEOPOINT
    • Struct or array composed with the above allowed functions, for example: "[CURRENT_DATE(), DATE '2020-01-01'"]
Examples 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.geography "home", mode: :required
end

Add field with default value.

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.geography "home", default_value_expression: "ST_GEOGPOINT(-122.084801, 37.422131)"
end

#insert

def insert()
Raises
  • (RuntimeError) — not implemented

#insert_async

def insert_async()
Raises
  • (RuntimeError) — not implemented

#integer

def integer(name, description: nil, mode: :nullable, policy_tags: nil, default_value_expression: nil)

Adds an integer field to the schema.

See Schema#integer.

Parameters
  • name (String) — The field name. The name must contain only letters ([A-Za-z]), numbers ([0-9]), or underscores (_), and must start with a letter or underscore. The maximum length is 128 characters.
  • description (String) (defaults to: nil) — A description of the field.
  • mode (Symbol) (defaults to: :nullable) — The field's mode. The possible values are :nullable, :required, and :repeated. The default value is :nullable.
  • policy_tags (Array<String>, String) (defaults to: nil) — The policy tag list or single policy tag for the field. Policy tag identifiers are of the form projects/*/locations/*/taxonomies/*/policyTags/*. At most 1 policy tag is currently allowed.
  • default_value_expression (String) (defaults to: nil) —

    The default value of a field using a SQL expression. It can only be set for top level fields (columns). Use a struct or array expression to specify default value for the entire struct or array. The valid SQL expressions are:

    • Literals for all data types, including STRUCT and ARRAY.
    • The following functions: CURRENT_TIMESTAMP CURRENT_TIME CURRENT_DATE CURRENT_DATETIME GENERATE_UUID RAND SESSION_USER ST_GEOPOINT
    • Struct or array composed with the above allowed functions, for example: "[CURRENT_DATE(), DATE '2020-01-01'"]
Examples 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.integer "age", mode: :required
end

Add field with default value.

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.integer "age", default_value_expression: "1"
end

#load

def load()
Raises
  • (RuntimeError) — not implemented

#load_job

def load_job()
Raises
  • (RuntimeError) — not implemented

#numeric

def numeric(name, description: nil, mode: :nullable, policy_tags: nil, precision: nil, scale: nil, default_value_expression: nil)

Adds a numeric number field to the schema. NUMERIC is a decimal type with fixed precision and scale. Precision is the number of digits that the number contains. Scale is how many of these digits appear after the decimal point. It supports:

Precision: 38 Scale: 9 Min: -9.9999999999999999999999999999999999999E+28 Max: 9.9999999999999999999999999999999999999E+28

This type can represent decimal fractions exactly, and is suitable for financial calculations.

See Schema#numeric

Parameters
  • name (String) — The field name. The name must contain only letters ([A-Za-z]), numbers ([0-9]), or underscores (_), and must start with a letter or underscore. The maximum length is 128 characters.
  • description (String) (defaults to: nil) — A description of the field.
  • mode (Symbol) (defaults to: :nullable) — The field's mode. The possible values are :nullable, :required, and :repeated. The default value is :nullable.
  • policy_tags (Array<String>, String) (defaults to: nil) — The policy tag list or single policy tag for the field. Policy tag identifiers are of the form projects/*/locations/*/taxonomies/*/policyTags/*. At most 1 policy tag is currently allowed.
  • precision (Integer) (defaults to: nil) — The precision (maximum number of total digits) for the field. Acceptable values for precision must be: 1 ≤ (precision - scale) ≤ 29. Values for scale must be: 0 ≤ scale ≤ 9. If the scale value is set, the precision value must be set as well.
  • scale (Integer) (defaults to: nil) — The scale (maximum number of digits in the fractional part) for the field. Acceptable values for precision must be: 1 ≤ (precision - scale) ≤ 29. Values for scale must be: 0 ≤ scale ≤ 9. If the scale value is set, the precision value must be set as well.
  • default_value_expression (String) (defaults to: nil) —

    The default value of a field using a SQL expression. It can only be set for top level fields (columns). Use a struct or array expression to specify default value for the entire struct or array. The valid SQL expressions are:

    • Literals for all data types, including STRUCT and ARRAY.
    • The following functions: CURRENT_TIMESTAMP CURRENT_TIME CURRENT_DATE CURRENT_DATETIME GENERATE_UUID RAND SESSION_USER ST_GEOPOINT
    • Struct or array composed with the above allowed functions, for example: "[CURRENT_DATE(), DATE '2020-01-01'"]
Examples 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.numeric "total_cost", mode: :required
end

Add field with default value.

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.numeric "total_cost", default_value_expression: "1.0e4"
end

#query

def query()
Raises
  • (RuntimeError) — not implemented

#query_job

def query_job()
Raises
  • (RuntimeError) — not implemented

#range_partitioning_end=

def range_partitioning_end=(range_end)

Sets the end of range partitioning, exclusive, for the table. See Creating and using integer range partitioned tables.

You can only set range partitioning when creating a table as in the example below. BigQuery does not allow you to change partitioning on an existing table.

See #range_partitioning_start=, #range_partitioning_interval= and #range_partitioning_field=.

Parameter
  • range_end (Integer) — The end of range partitioning, exclusive.
Example 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"

table = dataset.create_table "my_table" do |t|
  t.schema do |schema|
    schema.integer "my_table_id", mode: :required
    schema.string "my_table_data", mode: :required
  end
  t.range_partitioning_field = "my_table_id"
  t.range_partitioning_start = 0
  t.range_partitioning_interval = 10
  t.range_partitioning_end = 100
end

#range_partitioning_field=

def range_partitioning_field=(field)

Sets the field on which to range partition the table. See Creating and using integer range partitioned tables.

See #range_partitioning_start=, #range_partitioning_interval= and #range_partitioning_end=.

You can only set range partitioning when creating a table as in the example below. BigQuery does not allow you to change partitioning on an existing table.

Parameter
  • field (String) — The range partition field. The table is partitioned by this field. The field must be a top-level NULLABLE/REQUIRED field. The only supported type is INTEGER/INT64.
Example 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"

table = dataset.create_table "my_table" do |t|
  t.schema do |schema|
    schema.integer "my_table_id", mode: :required
    schema.string "my_table_data", mode: :required
  end
  t.range_partitioning_field = "my_table_id"
  t.range_partitioning_start = 0
  t.range_partitioning_interval = 10
  t.range_partitioning_end = 100
end

#range_partitioning_interval=

def range_partitioning_interval=(range_interval)

Sets width of each interval for data in range partitions. See Creating and using integer range partitioned tables.

You can only set range partitioning when creating a table as in the example below. BigQuery does not allow you to change partitioning on an existing table.

See #range_partitioning_field=, #range_partitioning_start= and #range_partitioning_end=.

Parameter
  • range_interval (Integer) — The width of each interval, for data in partitions.
Example 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"

table = dataset.create_table "my_table" do |t|
  t.schema do |schema|
    schema.integer "my_table_id", mode: :required
    schema.string "my_table_data", mode: :required
  end
  t.range_partitioning_field = "my_table_id"
  t.range_partitioning_start = 0
  t.range_partitioning_interval = 10
  t.range_partitioning_end = 100
end

#range_partitioning_start=

def range_partitioning_start=(range_start)

Sets the start of range partitioning, inclusive, for the table. See Creating and using integer range partitioned tables.

You can only set range partitioning when creating a table as in the example below. BigQuery does not allow you to change partitioning on an existing table.

See #range_partitioning_field=, #range_partitioning_interval= and #range_partitioning_end=.

Parameter
  • range_start (Integer) — The start of range partitioning, inclusive.
Example 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"

table = dataset.create_table "my_table" do |t|
  t.schema do |schema|
    schema.integer "my_table_id", mode: :required
    schema.string "my_table_data", mode: :required
  end
  t.range_partitioning_field = "my_table_id"
  t.range_partitioning_start = 0
  t.range_partitioning_interval = 10
  t.range_partitioning_end = 100
end

#record

def record(name, description: nil, mode: nil, default_value_expression: nil, &block) { |nested_schema| ... }

Adds a record field to the schema. A block must be passed describing the nested fields of the record. For more information about nested and repeated records, see Loading denormalized, nested, and repeated data .

See Schema#record.

Parameters
  • name (String) — The field name. The name must contain only letters ([A-Za-z]), numbers ([0-9]), or underscores (_), and must start with a letter or underscore. The maximum length is 128 characters.
  • description (String) (defaults to: nil) — A description of the field.
  • mode (Symbol) (defaults to: nil) — The field's mode. The possible values are :nullable, :required, and :repeated. The default value is :nullable.
  • default_value_expression (String) (defaults to: nil) —

    The default value of a field using a SQL expression. It can only be set for top level fields (columns). Use a struct or array expression to specify default value for the entire struct or array. The valid SQL expressions are:

    • Literals for all data types, including STRUCT and ARRAY.
    • The following functions: CURRENT_TIMESTAMP CURRENT_TIME CURRENT_DATE CURRENT_DATETIME GENERATE_UUID RAND SESSION_USER ST_GEOPOINT
    • Struct or array composed with the above allowed functions, for example: "[CURRENT_DATE(), DATE '2020-01-01'"]
Yields
  • (nested_schema) — a block for setting the nested schema
Yield Parameter
  • nested_schema (Schema) — the object accepting the nested schema
Examples 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.record "cities_lived", mode: :repeated do |cities_lived|
    cities_lived.string "place", mode: :required
    cities_lived.integer "number_of_years", mode: :required
  end
end

Add field with default value.

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.record "cities_lived", mode: :repeated, "[STRUCT('place',10)]" do |cities_lived|
    cities_lived.string "place", mode: :required
    cities_lived.integer "number_of_years", mode: :required
  end
end

#refresh!

def refresh!()
Alias Of: #reload!
Raises
  • (RuntimeError) — not implemented

#reload!

def reload!()
Aliases
Raises
  • (RuntimeError) — not implemented

#schema

def schema(replace: false) { |schema| ... } -> Google::Cloud::Bigquery::Schema

Returns the table's schema. This method can also be used to set, replace, or add to the schema by passing a block. See Schema for available methods.

Parameter
  • replace (Boolean) (defaults to: false) — Whether to replace the existing schema with the new schema. If true, the fields will replace the existing schema. If false, the fields will be added to the existing schema. When a table already contains data, schema changes must be additive. Thus, the default value is false. When loading from a file this will always replace the schema, no matter what replace is set to. You can update the schema (for example, for a table that already contains data) by providing a schema file that includes the existing schema plus any new fields.
Yields
  • (schema) — a block for setting the schema
Yield Parameter
  • schema (Schema) — the object accepting the schema
Returns
Examples 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |t|
  t.name = "My Table"
  t.description = "A description of my table."
  t.schema do |s|
    s.string "first_name", mode: :required
    s.record "cities_lived", mode: :repeated do |r|
      r.string "place", mode: :required
      r.integer "number_of_years", mode: :required
    end
  end
end

Load the schema from a file

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |t|
  t.name = "My Table"
  t.description = "A description of my table."
  t.schema do |s|
    s.load File.open("schema.json")
  end
end

#string

def string(name, description: nil, mode: :nullable, policy_tags: nil, max_length: nil, default_value_expression: nil)

Adds a string field to the schema.

See Schema#string.

Parameters
  • name (String) — The field name. The name must contain only letters ([A-Za-z]), numbers ([0-9]), or underscores (_), and must start with a letter or underscore. The maximum length is 128 characters.
  • description (String) (defaults to: nil) — A description of the field.
  • mode (Symbol) (defaults to: :nullable) — The field's mode. The possible values are :nullable, :required, and :repeated. The default value is :nullable.
  • policy_tags (Array<String>, String) (defaults to: nil) — The policy tag list or single policy tag for the field. Policy tag identifiers are of the form projects/*/locations/*/taxonomies/*/policyTags/*. At most 1 policy tag is currently allowed.
  • max_length (Integer) (defaults to: nil) — The maximum UTF-8 length of strings allowed in the field.
  • default_value_expression (String) (defaults to: nil) —

    The default value of a field using a SQL expression. It can only be set for top level fields (columns). Use a struct or array expression to specify default value for the entire struct or array. The valid SQL expressions are:

    • Literals for all data types, including STRUCT and ARRAY.
    • The following functions: CURRENT_TIMESTAMP CURRENT_TIME CURRENT_DATE CURRENT_DATETIME GENERATE_UUID RAND SESSION_USER ST_GEOPOINT
    • Struct or array composed with the above allowed functions, for example: "[CURRENT_DATE(), DATE '2020-01-01'"]
Examples 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.string "first_name", mode: :required
end

Add field with default value.

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.string "first_name", default_value_expression: "'name'"
end

#time

def time(name, description: nil, mode: :nullable, policy_tags: nil, default_value_expression: nil)

Adds a time field to the schema.

See Schema#time.

Parameters
  • name (String) — The field name. The name must contain only letters ([A-Za-z]), numbers ([0-9]), or underscores (_), and must start with a letter or underscore. The maximum length is 128 characters.
  • description (String) (defaults to: nil) — A description of the field.
  • mode (Symbol) (defaults to: :nullable) — The field's mode. The possible values are :nullable, :required, and :repeated. The default value is :nullable.
  • policy_tags (Array<String>, String) (defaults to: nil) — The policy tag list or single policy tag for the field. Policy tag identifiers are of the form projects/*/locations/*/taxonomies/*/policyTags/*. At most 1 policy tag is currently allowed.
  • default_value_expression (String) (defaults to: nil) —

    The default value of a field using a SQL expression. It can only be set for top level fields (columns). Use a struct or array expression to specify default value for the entire struct or array. The valid SQL expressions are:

    • Literals for all data types, including STRUCT and ARRAY.
    • The following functions: CURRENT_TIMESTAMP CURRENT_TIME CURRENT_DATE CURRENT_DATETIME GENERATE_UUID RAND SESSION_USER ST_GEOPOINT
    • Struct or array composed with the above allowed functions, for example: "[CURRENT_DATE(), DATE '2020-01-01'"]
Examples 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.time "duration", mode: :required
end

Add field with default value.

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.time "duration", default_value_expression: "CURRENT_TIME"
end

#timestamp

def timestamp(name, description: nil, mode: :nullable, policy_tags: nil, default_value_expression: nil)

Adds a timestamp field to the schema.

See Schema#timestamp.

Parameters
  • name (String) — The field name. The name must contain only letters ([A-Za-z]), numbers ([0-9]), or underscores (_), and must start with a letter or underscore. The maximum length is 128 characters.
  • description (String) (defaults to: nil) — A description of the field.
  • mode (Symbol) (defaults to: :nullable) — The field's mode. The possible values are :nullable, :required, and :repeated. The default value is :nullable.
  • policy_tags (Array<String>, String) (defaults to: nil) — The policy tag list or single policy tag for the field. Policy tag identifiers are of the form projects/*/locations/*/taxonomies/*/policyTags/*. At most 1 policy tag is currently allowed.
  • default_value_expression (String) (defaults to: nil) —

    The default value of a field using a SQL expression. It can only be set for top level fields (columns). Use a struct or array expression to specify default value for the entire struct or array. The valid SQL expressions are:

    • Literals for all data types, including STRUCT and ARRAY.
    • The following functions: CURRENT_TIMESTAMP CURRENT_TIME CURRENT_DATE CURRENT_DATETIME GENERATE_UUID RAND SESSION_USER ST_GEOPOINT
    • Struct or array composed with the above allowed functions, for example: "[CURRENT_DATE(), DATE '2020-01-01'"]
Examples 
require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.timestamp "creation_date", mode: :required
end

Add field with default value.

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new
dataset = bigquery.dataset "my_dataset"
table = dataset.create_table "my_table" do |schema|
  schema.timestamp "creation_date", default_value_expression: "CURRENT_TIMESTAMP"
end