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com.walmartlabs.lacinia.executor

Mechanisms for executing parsed queries against compiled schemas.

Mechanisms for executing parsed queries against compiled schemas.
raw docstring

execute-queryclj

(execute-query context)

Entrypoint for execution of a query.

Expects the context to contain the schema and parsed query.

Returns a ResolverResult that will deliver the result map.

This should generally not be invoked by user code; see [[execute-parsed-query]].

Entrypoint for execution of a query.

Expects the context to contain the schema and parsed query.

Returns a ResolverResult that will deliver the result map.

This should generally not be invoked by user code; see [[execute-parsed-query]].
sourceraw docstring

ExecutionContextclj

source

invoke-streamerclj

(invoke-streamer context source-stream)

Given a parsed and prepared query (inside the context, as with execute-query), this will locate the streamer for a subscription and invoke it, passing it the context, the subscription arguments, and the source stream.

Given a parsed and prepared query (inside the context, as with [[execute-query]]),
this will locate the streamer for a subscription
and invoke it, passing it the context, the subscription arguments, and the source stream.
sourceraw docstring

parsed-query->contextclj

(parsed-query->context parsed-query)

Converts a parsed query, prior to execution, into a context compatible with preview API:

This is used to preview the execution of the query prior to execution.

Converts a parsed query, prior to execution, into a context compatible with preview API:

* [[selections-tree]]
* [[selects-field?]]
* [[selections-seq]]

This is used to preview the execution of the query prior to execution.
sourceraw docstring

ResultTupleclj

source

selections-seqclj

(selections-seq context)

A width-first traversal of the selections tree, returning a lazy sequence of qualified field names. A qualified field name is a namespaced keyword, the namespace is the containing type, e.g. :User/name.

Fragments are flattened (as if always selected).

A width-first traversal of the selections tree, returning a lazy sequence
of qualified field names.  A qualified field name is a namespaced keyword,
the namespace is the containing type, e.g. :User/name.

Fragments are flattened (as if always selected).
sourceraw docstring

selections-seq2clj

(selections-seq2 context)

An enhancement of selections-seq that returns a map for each node:

:name : The qualified field name

:args : The arguments of the field (if any)

:alias : The alias for the field, if any

An enhancement of [[selections-seq]] that returns a map for each node:

:name
: The qualified field name

:args
: The arguments of the field (if any)

:alias
: The alias for the field, if any
sourceraw docstring

selections-treeclj

(selections-tree context)

Constructs a tree of the selections below the current field.

Returns a map where the keys are qualified field names (the selections for this field). The value is a vector of maps with three optional keys; :args, :alias, and :selections. :args is the arguments that will be passed to that field's resolver. :selections is the nested selection tree. :alias is the alias for the field (most fields do not have aliases).

A vector is returned because the selection for an outer field may, via aliases, reference the same inner field multiple times (with different arguments, aliases, and/or sub-selections).

Each key of a nested map is present only if a value is provided; for scalar fields with no arguments, the nested map will be nil.

Fragments are flattened into containing fields, as with selections-seq.

Constructs a tree of the selections below the current field.

Returns a map where the keys are qualified field names (the selections for this field).
The value is a vector of maps with three optional keys; :args, :alias, and :selections.
:args is the arguments that will be passed to that field's resolver.
:selections is the nested selection tree.
:alias is the alias for the field (most fields do not have aliases).

A vector is returned because the selection for an outer field may, via aliases, reference
the same inner field multiple times (with different arguments, aliases, and/or sub-selections).

Each key of a nested map is present only if a value is provided; for scalar fields with no arguments, the
nested map will be nil.

Fragments are flattened into containing fields, as with `selections-seq`.
sourceraw docstring

selects-field?clj

(selects-field? context field-name)

Invoked by a field resolver to determine if a particular field is selected anywhere within the selection tree (that is, at any depth).

Invoked by a field resolver to determine if a particular field is selected anywhere within the selection
tree (that is, at any depth).
sourceraw docstring

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