Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+
+<h1><a href="bigquery_v2.html">BigQuery API</a> . <a href="bigquery_v2.routines.html">routines</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#delete">delete(projectId, datasetId, routineId)</a></code></p>
+<p class="firstline">Deletes the routine specified by routineId from the dataset.</p>
+<p class="toc_element">
+  <code><a href="#get">get(projectId, datasetId, routineId, fieldMask=None)</a></code></p>
+<p class="firstline">Gets the specified routine resource by routine ID.</p>
+<p class="toc_element">
+  <code><a href="#insert">insert(projectId, datasetId, body)</a></code></p>
+<p class="firstline">Creates a new routine in the dataset.</p>
+<p class="toc_element">
+  <code><a href="#list">list(projectId, datasetId, pageToken=None, maxResults=None)</a></code></p>
+<p class="firstline">Lists all routines in the specified dataset. Requires the READER dataset</p>
+<p class="toc_element">
+  <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
+<p class="firstline">Retrieves the next page of results.</p>
+<p class="toc_element">
+  <code><a href="#update">update(projectId, datasetId, routineId, body)</a></code></p>
+<p class="firstline">Updates information in an existing routine. The update method replaces the</p>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="delete">delete(projectId, datasetId, routineId)</code>
+  <pre>Deletes the routine specified by routineId from the dataset.
+
+Args:
+  projectId: string, Project ID of the routine to delete (required)
+  datasetId: string, Dataset ID of the routine to delete (required)
+  routineId: string, Routine ID of the routine to delete (required)
+</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="get">get(projectId, datasetId, routineId, fieldMask=None)</code>
+  <pre>Gets the specified routine resource by routine ID.
+
+Args:
+  projectId: string, Project ID of the requested routine (required)
+  datasetId: string, Dataset ID of the requested routine (required)
+  routineId: string, Routine ID of the requested routine (required)
+  fieldMask: string, If set, only the Routine fields in the field mask are returned in the
+response. If unset, all Routine fields are returned.
+
+Returns:
+  An object of the form:
+
+    { # A user-defined function or a stored procedure.
+      "routineType": "A String", # Required.
+      "language": "A String", # Optional. Defaults to "SQL".
+      "creationTime": "A String", # Output only. The time when this routine was created, in milliseconds since
+          # the epoch.
+      "importedLibraries": [ # Optional. If language = "JAVASCRIPT", this field stores the path of the
+          # imported JAVASCRIPT libraries.
+        "A String",
+      ],
+      "routineReference": { # Required. Reference describing the ID of this routine.
+        "projectId": "A String", # [Required] The ID of the project containing this routine.
+        "routineId": "A String", # [Required] The ID of the routine. The ID must contain only letters (a-z, A-Z), numbers (0-9), or underscores (_). The maximum length is 256 characters.
+        "datasetId": "A String", # [Required] The ID of the dataset containing this routine.
+      },
+      "etag": "A String", # Output only. A hash of this resource.
+      "arguments": [ # Optional.
+        { # Input/output argument of a function or a stored procedure.
+          "dataType": { # The type of a variable, e.g., a function argument. # Required unless argument_kind = ANY_TYPE.
+              # Examples:
+              # INT64: {type_kind="INT64"}
+              # ARRAY<STRING>: {type_kind="ARRAY", array_element_type="STRING"}
+              # STRUCT<x STRING, y ARRAY<DATE>>:
+              #   {type_kind="STRUCT",
+              #    struct_type={fields=[
+              #      {name="x", type={type_kind="STRING"}},
+              #      {name="y", type={type_kind="ARRAY", array_element_type="DATE"}}
+              #    ]}}
+            "structType": { # The fields of this struct, in order, if type_kind = "STRUCT".
+              "fields": [
+                # Object with schema name: StandardSqlField
+              ],
+            },
+            "arrayElementType": # Object with schema name: StandardSqlDataType # The type of the array's elements, if type_kind = "ARRAY".
+            "typeKind": "A String", # Required. The top level type of this field.
+                # Can be any standard SQL data type (e.g., "INT64", "DATE", "ARRAY").
+          },
+          "argumentKind": "A String", # Optional. Defaults to FIXED_TYPE.
+          "mode": "A String", # Optional. Specifies whether the argument is input or output.
+              # Can be set for procedures only.
+          "name": "A String", # Optional. The name of this argument. Can be absent for function return
+              # argument.
+        },
+      ],
+      "returnType": { # The type of a variable, e.g., a function argument. # Optional if language = "SQL"; required otherwise.
+          # If absent, the return type is inferred from definition_body at query time
+          # in each query that references this routine. If present, then the evaluated
+          # result will be cast to the specified returned type at query time.
+          #
+          # For example, for the functions created with the following statements
+          #   CREATE FUNCTION Add(x FLOAT64, y FLOAT64) RETURNS FLOAT64 AS (x + y);
+          #   CREATE FUNCTION Increment(x FLOAT64) AS (Add(x, 1));
+          #   CREATE FUNCTION Decrement(x FLOAT64) RETURNS FLOAT64 AS (Add(x, -1));
+          # The return_type is {type_kind: "FLOAT64"} for Add and Decrement, and
+          # is absent for Increment (inferred as FLOAT64 at query time).
+          # Suppose the function Add is replaced by
+          #   CREATE OR REPLACE FUNCTION Add(x INT64, y INT64) AS (x + y);
+          # Then the inferred return type of Increment is automatically changed to
+          # INT64 at query time, while the return type of Decrement remains FLOAT64.
+          # Examples:
+          # INT64: {type_kind="INT64"}
+          # ARRAY<STRING>: {type_kind="ARRAY", array_element_type="STRING"}
+          # STRUCT<x STRING, y ARRAY<DATE>>:
+          #   {type_kind="STRUCT",
+          #    struct_type={fields=[
+          #      {name="x", type={type_kind="STRING"}},
+          #      {name="y", type={type_kind="ARRAY", array_element_type="DATE"}}
+          #    ]}}
+        "structType": { # The fields of this struct, in order, if type_kind = "STRUCT".
+          "fields": [
+            # Object with schema name: StandardSqlField
+          ],
+        },
+        "arrayElementType": # Object with schema name: StandardSqlDataType # The type of the array's elements, if type_kind = "ARRAY".
+        "typeKind": "A String", # Required. The top level type of this field.
+            # Can be any standard SQL data type (e.g., "INT64", "DATE", "ARRAY").
+      },
+      "lastModifiedTime": "A String", # Output only. The time when this routine was last modified, in milliseconds
+          # since the epoch.
+      "definitionBody": "A String", # Required. The body of the routine.
+          # For functions, this is the expression in the AS clause.
+          # If language=SQL, it is the substring inside (but excluding) the
+          # parentheses. For example, for the function created with the following
+          # statement
+          #   create function JoinLines(x string, y string) as (concat(x, "\n", y))
+          # definition_body = r'concat(x, "\n", y)' (\n is not replaced with
+          # linebreak).
+          # If language=JAVASCRIPT, it is the evaluated string in the AS clause.
+          # For example, for the function created with the following statement
+          #   CREATE FUNCTION f() RETURNS STRING LANGUAGE js AS 'return "\n";\n'
+          # definition_body = 'return "\n";\n' (both \n are replaced with
+          # linebreaks).
+    }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="insert">insert(projectId, datasetId, body)</code>
+  <pre>Creates a new routine in the dataset.
+
+Args:
+  projectId: string, Project ID of the new routine (required)
+  datasetId: string, Dataset ID of the new routine (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # A user-defined function or a stored procedure.
+    "routineType": "A String", # Required.
+    "language": "A String", # Optional. Defaults to "SQL".
+    "creationTime": "A String", # Output only. The time when this routine was created, in milliseconds since
+        # the epoch.
+    "importedLibraries": [ # Optional. If language = "JAVASCRIPT", this field stores the path of the
+        # imported JAVASCRIPT libraries.
+      "A String",
+    ],
+    "routineReference": { # Required. Reference describing the ID of this routine.
+      "projectId": "A String", # [Required] The ID of the project containing this routine.
+      "routineId": "A String", # [Required] The ID of the routine. The ID must contain only letters (a-z, A-Z), numbers (0-9), or underscores (_). The maximum length is 256 characters.
+      "datasetId": "A String", # [Required] The ID of the dataset containing this routine.
+    },
+    "etag": "A String", # Output only. A hash of this resource.
+    "arguments": [ # Optional.
+      { # Input/output argument of a function or a stored procedure.
+        "dataType": { # The type of a variable, e.g., a function argument. # Required unless argument_kind = ANY_TYPE.
+            # Examples:
+            # INT64: {type_kind="INT64"}
+            # ARRAY<STRING>: {type_kind="ARRAY", array_element_type="STRING"}
+            # STRUCT<x STRING, y ARRAY<DATE>>:
+            #   {type_kind="STRUCT",
+            #    struct_type={fields=[
+            #      {name="x", type={type_kind="STRING"}},
+            #      {name="y", type={type_kind="ARRAY", array_element_type="DATE"}}
+            #    ]}}
+          "structType": { # The fields of this struct, in order, if type_kind = "STRUCT".
+            "fields": [
+              # Object with schema name: StandardSqlField
+            ],
+          },
+          "arrayElementType": # Object with schema name: StandardSqlDataType # The type of the array's elements, if type_kind = "ARRAY".
+          "typeKind": "A String", # Required. The top level type of this field.
+              # Can be any standard SQL data type (e.g., "INT64", "DATE", "ARRAY").
+        },
+        "argumentKind": "A String", # Optional. Defaults to FIXED_TYPE.
+        "mode": "A String", # Optional. Specifies whether the argument is input or output.
+            # Can be set for procedures only.
+        "name": "A String", # Optional. The name of this argument. Can be absent for function return
+            # argument.
+      },
+    ],
+    "returnType": { # The type of a variable, e.g., a function argument. # Optional if language = "SQL"; required otherwise.
+        # If absent, the return type is inferred from definition_body at query time
+        # in each query that references this routine. If present, then the evaluated
+        # result will be cast to the specified returned type at query time.
+        # 
+        # For example, for the functions created with the following statements
+        #   CREATE FUNCTION Add(x FLOAT64, y FLOAT64) RETURNS FLOAT64 AS (x + y);
+        #   CREATE FUNCTION Increment(x FLOAT64) AS (Add(x, 1));
+        #   CREATE FUNCTION Decrement(x FLOAT64) RETURNS FLOAT64 AS (Add(x, -1));
+        # The return_type is {type_kind: "FLOAT64"} for Add and Decrement, and
+        # is absent for Increment (inferred as FLOAT64 at query time).
+        # Suppose the function Add is replaced by
+        #   CREATE OR REPLACE FUNCTION Add(x INT64, y INT64) AS (x + y);
+        # Then the inferred return type of Increment is automatically changed to
+        # INT64 at query time, while the return type of Decrement remains FLOAT64.
+        # Examples:
+        # INT64: {type_kind="INT64"}
+        # ARRAY<STRING>: {type_kind="ARRAY", array_element_type="STRING"}
+        # STRUCT<x STRING, y ARRAY<DATE>>:
+        #   {type_kind="STRUCT",
+        #    struct_type={fields=[
+        #      {name="x", type={type_kind="STRING"}},
+        #      {name="y", type={type_kind="ARRAY", array_element_type="DATE"}}
+        #    ]}}
+      "structType": { # The fields of this struct, in order, if type_kind = "STRUCT".
+        "fields": [
+          # Object with schema name: StandardSqlField
+        ],
+      },
+      "arrayElementType": # Object with schema name: StandardSqlDataType # The type of the array's elements, if type_kind = "ARRAY".
+      "typeKind": "A String", # Required. The top level type of this field.
+          # Can be any standard SQL data type (e.g., "INT64", "DATE", "ARRAY").
+    },
+    "lastModifiedTime": "A String", # Output only. The time when this routine was last modified, in milliseconds
+        # since the epoch.
+    "definitionBody": "A String", # Required. The body of the routine.
+        # For functions, this is the expression in the AS clause.
+        # If language=SQL, it is the substring inside (but excluding) the
+        # parentheses. For example, for the function created with the following
+        # statement
+        #   create function JoinLines(x string, y string) as (concat(x, "\n", y))
+        # definition_body = r'concat(x, "\n", y)' (\n is not replaced with
+        # linebreak).
+        # If language=JAVASCRIPT, it is the evaluated string in the AS clause.
+        # For example, for the function created with the following statement
+        #   CREATE FUNCTION f() RETURNS STRING LANGUAGE js AS 'return "\n";\n'
+        # definition_body = 'return "\n";\n' (both \n are replaced with
+        # linebreaks).
+  }
+
+
+Returns:
+  An object of the form:
+
+    { # A user-defined function or a stored procedure.
+      "routineType": "A String", # Required.
+      "language": "A String", # Optional. Defaults to "SQL".
+      "creationTime": "A String", # Output only. The time when this routine was created, in milliseconds since
+          # the epoch.
+      "importedLibraries": [ # Optional. If language = "JAVASCRIPT", this field stores the path of the
+          # imported JAVASCRIPT libraries.
+        "A String",
+      ],
+      "routineReference": { # Required. Reference describing the ID of this routine.
+        "projectId": "A String", # [Required] The ID of the project containing this routine.
+        "routineId": "A String", # [Required] The ID of the routine. The ID must contain only letters (a-z, A-Z), numbers (0-9), or underscores (_). The maximum length is 256 characters.
+        "datasetId": "A String", # [Required] The ID of the dataset containing this routine.
+      },
+      "etag": "A String", # Output only. A hash of this resource.
+      "arguments": [ # Optional.
+        { # Input/output argument of a function or a stored procedure.
+          "dataType": { # The type of a variable, e.g., a function argument. # Required unless argument_kind = ANY_TYPE.
+              # Examples:
+              # INT64: {type_kind="INT64"}
+              # ARRAY<STRING>: {type_kind="ARRAY", array_element_type="STRING"}
+              # STRUCT<x STRING, y ARRAY<DATE>>:
+              #   {type_kind="STRUCT",
+              #    struct_type={fields=[
+              #      {name="x", type={type_kind="STRING"}},
+              #      {name="y", type={type_kind="ARRAY", array_element_type="DATE"}}
+              #    ]}}
+            "structType": { # The fields of this struct, in order, if type_kind = "STRUCT".
+              "fields": [
+                # Object with schema name: StandardSqlField
+              ],
+            },
+            "arrayElementType": # Object with schema name: StandardSqlDataType # The type of the array's elements, if type_kind = "ARRAY".
+            "typeKind": "A String", # Required. The top level type of this field.
+                # Can be any standard SQL data type (e.g., "INT64", "DATE", "ARRAY").
+          },
+          "argumentKind": "A String", # Optional. Defaults to FIXED_TYPE.
+          "mode": "A String", # Optional. Specifies whether the argument is input or output.
+              # Can be set for procedures only.
+          "name": "A String", # Optional. The name of this argument. Can be absent for function return
+              # argument.
+        },
+      ],
+      "returnType": { # The type of a variable, e.g., a function argument. # Optional if language = "SQL"; required otherwise.
+          # If absent, the return type is inferred from definition_body at query time
+          # in each query that references this routine. If present, then the evaluated
+          # result will be cast to the specified returned type at query time.
+          #
+          # For example, for the functions created with the following statements
+          #   CREATE FUNCTION Add(x FLOAT64, y FLOAT64) RETURNS FLOAT64 AS (x + y);
+          #   CREATE FUNCTION Increment(x FLOAT64) AS (Add(x, 1));
+          #   CREATE FUNCTION Decrement(x FLOAT64) RETURNS FLOAT64 AS (Add(x, -1));
+          # The return_type is {type_kind: "FLOAT64"} for Add and Decrement, and
+          # is absent for Increment (inferred as FLOAT64 at query time).
+          # Suppose the function Add is replaced by
+          #   CREATE OR REPLACE FUNCTION Add(x INT64, y INT64) AS (x + y);
+          # Then the inferred return type of Increment is automatically changed to
+          # INT64 at query time, while the return type of Decrement remains FLOAT64.
+          # Examples:
+          # INT64: {type_kind="INT64"}
+          # ARRAY<STRING>: {type_kind="ARRAY", array_element_type="STRING"}
+          # STRUCT<x STRING, y ARRAY<DATE>>:
+          #   {type_kind="STRUCT",
+          #    struct_type={fields=[
+          #      {name="x", type={type_kind="STRING"}},
+          #      {name="y", type={type_kind="ARRAY", array_element_type="DATE"}}
+          #    ]}}
+        "structType": { # The fields of this struct, in order, if type_kind = "STRUCT".
+          "fields": [
+            # Object with schema name: StandardSqlField
+          ],
+        },
+        "arrayElementType": # Object with schema name: StandardSqlDataType # The type of the array's elements, if type_kind = "ARRAY".
+        "typeKind": "A String", # Required. The top level type of this field.
+            # Can be any standard SQL data type (e.g., "INT64", "DATE", "ARRAY").
+      },
+      "lastModifiedTime": "A String", # Output only. The time when this routine was last modified, in milliseconds
+          # since the epoch.
+      "definitionBody": "A String", # Required. The body of the routine.
+          # For functions, this is the expression in the AS clause.
+          # If language=SQL, it is the substring inside (but excluding) the
+          # parentheses. For example, for the function created with the following
+          # statement
+          #   create function JoinLines(x string, y string) as (concat(x, "\n", y))
+          # definition_body = r'concat(x, "\n", y)' (\n is not replaced with
+          # linebreak).
+          # If language=JAVASCRIPT, it is the evaluated string in the AS clause.
+          # For example, for the function created with the following statement
+          #   CREATE FUNCTION f() RETURNS STRING LANGUAGE js AS 'return "\n";\n'
+          # definition_body = 'return "\n";\n' (both \n are replaced with
+          # linebreaks).
+    }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list">list(projectId, datasetId, pageToken=None, maxResults=None)</code>
+  <pre>Lists all routines in the specified dataset. Requires the READER dataset
+role.
+
+Args:
+  projectId: string, Project ID of the routines to list (required)
+  datasetId: string, Dataset ID of the routines to list (required)
+  pageToken: string, Page token, returned by a previous call, to request the next page of
+results
+  maxResults: integer, The maximum number of results per page.
+
+Returns:
+  An object of the form:
+
+    {
+    "nextPageToken": "A String", # A token to request the next page of results.
+    "routines": [ # Routines in the requested dataset. Only the following fields are populated:
+        # etag, project_id, dataset_id, routine_id, routine_type, creation_time,
+        # last_modified_time, language.
+      { # A user-defined function or a stored procedure.
+          "routineType": "A String", # Required.
+          "language": "A String", # Optional. Defaults to "SQL".
+          "creationTime": "A String", # Output only. The time when this routine was created, in milliseconds since
+              # the epoch.
+          "importedLibraries": [ # Optional. If language = "JAVASCRIPT", this field stores the path of the
+              # imported JAVASCRIPT libraries.
+            "A String",
+          ],
+          "routineReference": { # Required. Reference describing the ID of this routine.
+            "projectId": "A String", # [Required] The ID of the project containing this routine.
+            "routineId": "A String", # [Required] The ID of the routine. The ID must contain only letters (a-z, A-Z), numbers (0-9), or underscores (_). The maximum length is 256 characters.
+            "datasetId": "A String", # [Required] The ID of the dataset containing this routine.
+          },
+          "etag": "A String", # Output only. A hash of this resource.
+          "arguments": [ # Optional.
+            { # Input/output argument of a function or a stored procedure.
+              "dataType": { # The type of a variable, e.g., a function argument. # Required unless argument_kind = ANY_TYPE.
+                  # Examples:
+                  # INT64: {type_kind="INT64"}
+                  # ARRAY<STRING>: {type_kind="ARRAY", array_element_type="STRING"}
+                  # STRUCT<x STRING, y ARRAY<DATE>>:
+                  #   {type_kind="STRUCT",
+                  #    struct_type={fields=[
+                  #      {name="x", type={type_kind="STRING"}},
+                  #      {name="y", type={type_kind="ARRAY", array_element_type="DATE"}}
+                  #    ]}}
+                "structType": { # The fields of this struct, in order, if type_kind = "STRUCT".
+                  "fields": [
+                    # Object with schema name: StandardSqlField
+                  ],
+                },
+                "arrayElementType": # Object with schema name: StandardSqlDataType # The type of the array's elements, if type_kind = "ARRAY".
+                "typeKind": "A String", # Required. The top level type of this field.
+                    # Can be any standard SQL data type (e.g., "INT64", "DATE", "ARRAY").
+              },
+              "argumentKind": "A String", # Optional. Defaults to FIXED_TYPE.
+              "mode": "A String", # Optional. Specifies whether the argument is input or output.
+                  # Can be set for procedures only.
+              "name": "A String", # Optional. The name of this argument. Can be absent for function return
+                  # argument.
+            },
+          ],
+          "returnType": { # The type of a variable, e.g., a function argument. # Optional if language = "SQL"; required otherwise.
+              # If absent, the return type is inferred from definition_body at query time
+              # in each query that references this routine. If present, then the evaluated
+              # result will be cast to the specified returned type at query time.
+              #
+              # For example, for the functions created with the following statements
+              #   CREATE FUNCTION Add(x FLOAT64, y FLOAT64) RETURNS FLOAT64 AS (x + y);
+              #   CREATE FUNCTION Increment(x FLOAT64) AS (Add(x, 1));
+              #   CREATE FUNCTION Decrement(x FLOAT64) RETURNS FLOAT64 AS (Add(x, -1));
+              # The return_type is {type_kind: "FLOAT64"} for Add and Decrement, and
+              # is absent for Increment (inferred as FLOAT64 at query time).
+              # Suppose the function Add is replaced by
+              #   CREATE OR REPLACE FUNCTION Add(x INT64, y INT64) AS (x + y);
+              # Then the inferred return type of Increment is automatically changed to
+              # INT64 at query time, while the return type of Decrement remains FLOAT64.
+              # Examples:
+              # INT64: {type_kind="INT64"}
+              # ARRAY<STRING>: {type_kind="ARRAY", array_element_type="STRING"}
+              # STRUCT<x STRING, y ARRAY<DATE>>:
+              #   {type_kind="STRUCT",
+              #    struct_type={fields=[
+              #      {name="x", type={type_kind="STRING"}},
+              #      {name="y", type={type_kind="ARRAY", array_element_type="DATE"}}
+              #    ]}}
+            "structType": { # The fields of this struct, in order, if type_kind = "STRUCT".
+              "fields": [
+                # Object with schema name: StandardSqlField
+              ],
+            },
+            "arrayElementType": # Object with schema name: StandardSqlDataType # The type of the array's elements, if type_kind = "ARRAY".
+            "typeKind": "A String", # Required. The top level type of this field.
+                # Can be any standard SQL data type (e.g., "INT64", "DATE", "ARRAY").
+          },
+          "lastModifiedTime": "A String", # Output only. The time when this routine was last modified, in milliseconds
+              # since the epoch.
+          "definitionBody": "A String", # Required. The body of the routine.
+              # For functions, this is the expression in the AS clause.
+              # If language=SQL, it is the substring inside (but excluding) the
+              # parentheses. For example, for the function created with the following
+              # statement
+              #   create function JoinLines(x string, y string) as (concat(x, "\n", y))
+              # definition_body = r'concat(x, "\n", y)' (\n is not replaced with
+              # linebreak).
+              # If language=JAVASCRIPT, it is the evaluated string in the AS clause.
+              # For example, for the function created with the following statement
+              #   CREATE FUNCTION f() RETURNS STRING LANGUAGE js AS 'return "\n";\n'
+              # definition_body = 'return "\n";\n' (both \n are replaced with
+              # linebreaks).
+        },
+    ],
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list_next">list_next(previous_request, previous_response)</code>
+  <pre>Retrieves the next page of results.
+
+Args:
+  previous_request: The request for the previous page. (required)
+  previous_response: The response from the request for the previous page. (required)
+
+Returns:
+  A request object that you can call 'execute()' on to request the next
+  page. Returns None if there are no more items in the collection.
+    </pre>
+</div>
+
+<div class="method">
+    <code class="details" id="update">update(projectId, datasetId, routineId, body)</code>
+  <pre>Updates information in an existing routine. The update method replaces the
+entire Routine resource.
+
+Args:
+  projectId: string, Project ID of the routine to update (required)
+  datasetId: string, Dataset ID of the routine to update (required)
+  routineId: string, Routine ID of the routine to update (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # A user-defined function or a stored procedure.
+    "routineType": "A String", # Required.
+    "language": "A String", # Optional. Defaults to "SQL".
+    "creationTime": "A String", # Output only. The time when this routine was created, in milliseconds since
+        # the epoch.
+    "importedLibraries": [ # Optional. If language = "JAVASCRIPT", this field stores the path of the
+        # imported JAVASCRIPT libraries.
+      "A String",
+    ],
+    "routineReference": { # Required. Reference describing the ID of this routine.
+      "projectId": "A String", # [Required] The ID of the project containing this routine.
+      "routineId": "A String", # [Required] The ID of the routine. The ID must contain only letters (a-z, A-Z), numbers (0-9), or underscores (_). The maximum length is 256 characters.
+      "datasetId": "A String", # [Required] The ID of the dataset containing this routine.
+    },
+    "etag": "A String", # Output only. A hash of this resource.
+    "arguments": [ # Optional.
+      { # Input/output argument of a function or a stored procedure.
+        "dataType": { # The type of a variable, e.g., a function argument. # Required unless argument_kind = ANY_TYPE.
+            # Examples:
+            # INT64: {type_kind="INT64"}
+            # ARRAY<STRING>: {type_kind="ARRAY", array_element_type="STRING"}
+            # STRUCT<x STRING, y ARRAY<DATE>>:
+            #   {type_kind="STRUCT",
+            #    struct_type={fields=[
+            #      {name="x", type={type_kind="STRING"}},
+            #      {name="y", type={type_kind="ARRAY", array_element_type="DATE"}}
+            #    ]}}
+          "structType": { # The fields of this struct, in order, if type_kind = "STRUCT".
+            "fields": [
+              # Object with schema name: StandardSqlField
+            ],
+          },
+          "arrayElementType": # Object with schema name: StandardSqlDataType # The type of the array's elements, if type_kind = "ARRAY".
+          "typeKind": "A String", # Required. The top level type of this field.
+              # Can be any standard SQL data type (e.g., "INT64", "DATE", "ARRAY").
+        },
+        "argumentKind": "A String", # Optional. Defaults to FIXED_TYPE.
+        "mode": "A String", # Optional. Specifies whether the argument is input or output.
+            # Can be set for procedures only.
+        "name": "A String", # Optional. The name of this argument. Can be absent for function return
+            # argument.
+      },
+    ],
+    "returnType": { # The type of a variable, e.g., a function argument. # Optional if language = "SQL"; required otherwise.
+        # If absent, the return type is inferred from definition_body at query time
+        # in each query that references this routine. If present, then the evaluated
+        # result will be cast to the specified returned type at query time.
+        # 
+        # For example, for the functions created with the following statements
+        #   CREATE FUNCTION Add(x FLOAT64, y FLOAT64) RETURNS FLOAT64 AS (x + y);
+        #   CREATE FUNCTION Increment(x FLOAT64) AS (Add(x, 1));
+        #   CREATE FUNCTION Decrement(x FLOAT64) RETURNS FLOAT64 AS (Add(x, -1));
+        # The return_type is {type_kind: "FLOAT64"} for Add and Decrement, and
+        # is absent for Increment (inferred as FLOAT64 at query time).
+        # Suppose the function Add is replaced by
+        #   CREATE OR REPLACE FUNCTION Add(x INT64, y INT64) AS (x + y);
+        # Then the inferred return type of Increment is automatically changed to
+        # INT64 at query time, while the return type of Decrement remains FLOAT64.
+        # Examples:
+        # INT64: {type_kind="INT64"}
+        # ARRAY<STRING>: {type_kind="ARRAY", array_element_type="STRING"}
+        # STRUCT<x STRING, y ARRAY<DATE>>:
+        #   {type_kind="STRUCT",
+        #    struct_type={fields=[
+        #      {name="x", type={type_kind="STRING"}},
+        #      {name="y", type={type_kind="ARRAY", array_element_type="DATE"}}
+        #    ]}}
+      "structType": { # The fields of this struct, in order, if type_kind = "STRUCT".
+        "fields": [
+          # Object with schema name: StandardSqlField
+        ],
+      },
+      "arrayElementType": # Object with schema name: StandardSqlDataType # The type of the array's elements, if type_kind = "ARRAY".
+      "typeKind": "A String", # Required. The top level type of this field.
+          # Can be any standard SQL data type (e.g., "INT64", "DATE", "ARRAY").
+    },
+    "lastModifiedTime": "A String", # Output only. The time when this routine was last modified, in milliseconds
+        # since the epoch.
+    "definitionBody": "A String", # Required. The body of the routine.
+        # For functions, this is the expression in the AS clause.
+        # If language=SQL, it is the substring inside (but excluding) the
+        # parentheses. For example, for the function created with the following
+        # statement
+        #   create function JoinLines(x string, y string) as (concat(x, "\n", y))
+        # definition_body = r'concat(x, "\n", y)' (\n is not replaced with
+        # linebreak).
+        # If language=JAVASCRIPT, it is the evaluated string in the AS clause.
+        # For example, for the function created with the following statement
+        #   CREATE FUNCTION f() RETURNS STRING LANGUAGE js AS 'return "\n";\n'
+        # definition_body = 'return "\n";\n' (both \n are replaced with
+        # linebreaks).
+  }
+
+
+Returns:
+  An object of the form:
+
+    { # A user-defined function or a stored procedure.
+      "routineType": "A String", # Required.
+      "language": "A String", # Optional. Defaults to "SQL".
+      "creationTime": "A String", # Output only. The time when this routine was created, in milliseconds since
+          # the epoch.
+      "importedLibraries": [ # Optional. If language = "JAVASCRIPT", this field stores the path of the
+          # imported JAVASCRIPT libraries.
+        "A String",
+      ],
+      "routineReference": { # Required. Reference describing the ID of this routine.
+        "projectId": "A String", # [Required] The ID of the project containing this routine.
+        "routineId": "A String", # [Required] The ID of the routine. The ID must contain only letters (a-z, A-Z), numbers (0-9), or underscores (_). The maximum length is 256 characters.
+        "datasetId": "A String", # [Required] The ID of the dataset containing this routine.
+      },
+      "etag": "A String", # Output only. A hash of this resource.
+      "arguments": [ # Optional.
+        { # Input/output argument of a function or a stored procedure.
+          "dataType": { # The type of a variable, e.g., a function argument. # Required unless argument_kind = ANY_TYPE.
+              # Examples:
+              # INT64: {type_kind="INT64"}
+              # ARRAY<STRING>: {type_kind="ARRAY", array_element_type="STRING"}
+              # STRUCT<x STRING, y ARRAY<DATE>>:
+              #   {type_kind="STRUCT",
+              #    struct_type={fields=[
+              #      {name="x", type={type_kind="STRING"}},
+              #      {name="y", type={type_kind="ARRAY", array_element_type="DATE"}}
+              #    ]}}
+            "structType": { # The fields of this struct, in order, if type_kind = "STRUCT".
+              "fields": [
+                # Object with schema name: StandardSqlField
+              ],
+            },
+            "arrayElementType": # Object with schema name: StandardSqlDataType # The type of the array's elements, if type_kind = "ARRAY".
+            "typeKind": "A String", # Required. The top level type of this field.
+                # Can be any standard SQL data type (e.g., "INT64", "DATE", "ARRAY").
+          },
+          "argumentKind": "A String", # Optional. Defaults to FIXED_TYPE.
+          "mode": "A String", # Optional. Specifies whether the argument is input or output.
+              # Can be set for procedures only.
+          "name": "A String", # Optional. The name of this argument. Can be absent for function return
+              # argument.
+        },
+      ],
+      "returnType": { # The type of a variable, e.g., a function argument. # Optional if language = "SQL"; required otherwise.
+          # If absent, the return type is inferred from definition_body at query time
+          # in each query that references this routine. If present, then the evaluated
+          # result will be cast to the specified returned type at query time.
+          #
+          # For example, for the functions created with the following statements
+          #   CREATE FUNCTION Add(x FLOAT64, y FLOAT64) RETURNS FLOAT64 AS (x + y);
+          #   CREATE FUNCTION Increment(x FLOAT64) AS (Add(x, 1));
+          #   CREATE FUNCTION Decrement(x FLOAT64) RETURNS FLOAT64 AS (Add(x, -1));
+          # The return_type is {type_kind: "FLOAT64"} for Add and Decrement, and
+          # is absent for Increment (inferred as FLOAT64 at query time).
+          # Suppose the function Add is replaced by
+          #   CREATE OR REPLACE FUNCTION Add(x INT64, y INT64) AS (x + y);
+          # Then the inferred return type of Increment is automatically changed to
+          # INT64 at query time, while the return type of Decrement remains FLOAT64.
+          # Examples:
+          # INT64: {type_kind="INT64"}
+          # ARRAY<STRING>: {type_kind="ARRAY", array_element_type="STRING"}
+          # STRUCT<x STRING, y ARRAY<DATE>>:
+          #   {type_kind="STRUCT",
+          #    struct_type={fields=[
+          #      {name="x", type={type_kind="STRING"}},
+          #      {name="y", type={type_kind="ARRAY", array_element_type="DATE"}}
+          #    ]}}
+        "structType": { # The fields of this struct, in order, if type_kind = "STRUCT".
+          "fields": [
+            # Object with schema name: StandardSqlField
+          ],
+        },
+        "arrayElementType": # Object with schema name: StandardSqlDataType # The type of the array's elements, if type_kind = "ARRAY".
+        "typeKind": "A String", # Required. The top level type of this field.
+            # Can be any standard SQL data type (e.g., "INT64", "DATE", "ARRAY").
+      },
+      "lastModifiedTime": "A String", # Output only. The time when this routine was last modified, in milliseconds
+          # since the epoch.
+      "definitionBody": "A String", # Required. The body of the routine.
+          # For functions, this is the expression in the AS clause.
+          # If language=SQL, it is the substring inside (but excluding) the
+          # parentheses. For example, for the function created with the following
+          # statement
+          #   create function JoinLines(x string, y string) as (concat(x, "\n", y))
+          # definition_body = r'concat(x, "\n", y)' (\n is not replaced with
+          # linebreak).
+          # If language=JAVASCRIPT, it is the evaluated string in the AS clause.
+          # For example, for the function created with the following statement
+          #   CREATE FUNCTION f() RETURNS STRING LANGUAGE js AS 'return "\n";\n'
+          # definition_body = 'return "\n";\n' (both \n are replaced with
+          # linebreaks).
+    }</pre>
+</div>
+
+</body></html>
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