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https://github.com/hasura/graphql-engine.git
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remote joins: do not include the join field if it already exists (#402)
For remote joins, if join field already exists in the selection set, do not request it again. Include the join field only if it is not in the selection set. A field selection might be expensive, so we do not want to duplicate it. Fixes: https://hasurahq.atlassian.net/browse/V3API-296 V3_GIT_ORIGIN_REV_ID: d09e4298557ca098433b0758c15703295ccbfd39
This commit is contained in:
Anon Ray
hasura-bot
parent
dda2fb8eca
commit
10e12d8acf
@ -22,6 +22,7 @@ use crate::metadata::resolved;
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use crate::metadata::resolved::subgraph::{
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Qualified, QualifiedBaseType, QualifiedTypeName, QualifiedTypeReference,
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};
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use crate::metadata::resolved::types::FieldMapping;
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use crate::schema::types::TypeKind;
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use crate::schema::{
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types::{Annotation, OutputAnnotation, RootFieldAnnotation},
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@ -104,6 +105,23 @@ pub(crate) struct ResultSelectionSet<'s> {
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pub(crate) fields: IndexMap<String, FieldSelection<'s>>,
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}
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impl<'s> ResultSelectionSet<'s> {
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/// Takes a 'FieldMapping' and returns the alias, if the field is found in
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/// existing fields
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pub(crate) fn contains(&self, other_field: &FieldMapping) -> Option<String> {
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self.fields.iter().find_map(|(alias, field)| match field {
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FieldSelection::Column { column, .. } => {
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if *column == other_field.column {
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Some(alias.clone())
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} else {
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None
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}
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}
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_ => None,
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})
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}
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}
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fn build_global_id_fields(
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global_id_fields: &Vec<FieldName>,
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field_mappings: &BTreeMap<FieldName, resolved::types::FieldMapping>,
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@ -13,6 +13,7 @@ use crate::execute::remote_joins::types::{
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JoinLocations, JoinNode, LocationKind, MonotonicCounter, RemoteJoinType, TargetField,
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};
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use crate::execute::remote_joins::types::{Location, RemoteJoin};
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use crate::metadata::resolved::types::FieldMapping;
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pub(crate) fn process_nested_selection<'s, 'ir>(
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nested_selection: &'ir NestedSelection<'s>,
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@ -154,24 +155,18 @@ pub(crate) fn process_selection_set_ir<'s, 'ir>(
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ir,
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relationship_info,
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} => {
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// For all the left join fields, create an alias and inject
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// them into the NDC IR
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let mut join_mapping = HashMap::new();
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for ((src_field_alias, src_field), target_field) in &relationship_info.join_mapping
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{
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let lhs_alias = make_hasura_phantom_field(&src_field.column);
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ndc_fields.insert(
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lhs_alias.clone(),
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ndc::models::Field::Column {
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column: src_field.column.clone(),
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fields: None,
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},
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let ndc_field_alias = process_remote_relationship_field_mapping(
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model_selection,
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src_field,
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&mut ndc_fields,
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);
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join_mapping.insert(
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src_field_alias.clone(),
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(
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lhs_alias.clone(),
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ndc_field_alias,
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TargetField::ModelField(target_field.clone()),
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),
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);
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@ -197,24 +192,18 @@ pub(crate) fn process_selection_set_ir<'s, 'ir>(
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ir,
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relationship_info,
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} => {
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// For all the left join fields, create an alias and inject
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// them into the NDC IR
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let mut join_mapping = HashMap::new();
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for ((src_field_alias, src_field), target_field) in &relationship_info.join_mapping
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{
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let lhs_alias = make_hasura_phantom_field(&src_field.column);
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ndc_fields.insert(
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lhs_alias.clone(),
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ndc::models::Field::Column {
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column: src_field.column.clone(),
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fields: None,
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},
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let ndc_field_alias = process_remote_relationship_field_mapping(
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model_selection,
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src_field,
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&mut ndc_fields,
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);
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join_mapping.insert(
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src_field_alias.clone(),
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(
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lhs_alias.clone(),
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ndc_field_alias,
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TargetField::CommandField(target_field.clone()),
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),
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);
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@ -244,6 +233,34 @@ pub(crate) fn process_selection_set_ir<'s, 'ir>(
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Ok((ndc_fields, join_locations))
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}
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/// Processes a remote relationship field mapping, and returns the alias used in
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/// the NDC IR for that field
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///
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/// - if the selection set DOES NOT contain the field, insert it into the NDC IR
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/// (with an internal alias), and return the alias
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/// - if the selection set already contains the field, do not insert the field
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/// in NDC IR, and return the existing alias
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fn process_remote_relationship_field_mapping(
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selection: &ResultSelectionSet<'_>,
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field: &FieldMapping,
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ndc_fields: &mut IndexMap<String, ndc::models::Field>,
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) -> String {
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match selection.contains(field) {
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None => {
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let internal_alias = make_hasura_phantom_field(&field.column);
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ndc_fields.insert(
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internal_alias.clone(),
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ndc::models::Field::Column {
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column: field.column.clone(),
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fields: None,
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},
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);
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internal_alias
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}
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Some(field_alias) => field_alias,
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}
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}
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fn make_hasura_phantom_field(field_name: &str) -> String {
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format!("__hasura_phantom_field__{}", field_name)
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}
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@ -4,7 +4,7 @@ mod common;
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#[test]
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fn test_explain_introspection() {
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common::test_execute_explain(
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"explain/introspection_query/",
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"explain/introspection_query",
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"explain/introspection_query/metadata.json",
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&[],
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);
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@ -13,7 +13,7 @@ fn test_explain_introspection() {
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#[test]
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fn test_multi_root_field_queries() {
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common::test_execute_explain(
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"explain/multi_root_field_queries/",
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"explain/multi_root_field_queries",
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"execute/multiple_root_fields/successful_execution/metadata.json",
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&[],
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);
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@ -22,7 +22,7 @@ fn test_multi_root_field_queries() {
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#[test]
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fn test_field_with_remote_relationship() {
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common::test_execute_explain(
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"explain/field_with_remote_relationship/",
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"explain/field_with_remote_relationship",
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"execute/remote_relationships/array/metadata.json",
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&["execute/common_metadata/two_postgres_connector_schema.json"],
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);
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@ -31,7 +31,7 @@ fn test_field_with_remote_relationship() {
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#[test]
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fn test_field_with_local_relationship() {
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common::test_execute_explain(
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"explain/field_with_local_relationship/",
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"explain/field_with_local_relationship",
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"execute/relationships/array/metadata.json",
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&["execute/common_metadata/postgres_connector_schema.json"],
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);
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@ -40,7 +40,7 @@ fn test_field_with_local_relationship() {
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#[test]
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fn test_field_with_multi_remote_relationship_subfields() {
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common::test_execute_explain(
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"explain/field_with_multi_remote_relationship_subfields/",
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"explain/field_with_multi_remote_relationship_subfields",
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"explain/field_with_multi_remote_relationship_subfields/metadata.json",
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&["execute/common_metadata/two_postgres_connector_schema.json"],
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);
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@ -49,7 +49,7 @@ fn test_field_with_multi_remote_relationship_subfields() {
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#[test]
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fn test_field_with_nested_remote_relationship_1() {
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common::test_execute_explain(
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"explain/field_with_nested_remote_relationship_1/",
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"explain/field_with_nested_remote_relationship_1",
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"explain/field_with_nested_remote_relationship_1/metadata.json",
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&["execute/common_metadata/two_postgres_connector_schema.json"],
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);
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@ -58,7 +58,7 @@ fn test_field_with_nested_remote_relationship_1() {
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#[test]
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fn test_field_with_nested_remote_relationship_2() {
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common::test_execute_explain(
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"explain/field_with_nested_remote_relationship_2/",
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"explain/field_with_nested_remote_relationship_2",
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"explain/field_with_nested_remote_relationship_2/metadata.json",
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&["execute/common_metadata/two_postgres_connector_schema.json"],
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);
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@ -17,11 +17,6 @@
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"column": "ArtistId",
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"fields": null
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},
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"__hasura_phantom_field__ArtistId": {
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"type": "column",
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"column": "ArtistId",
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"fields": null
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},
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"__hasura_phantom_field__AlbumId": {
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"type": "column",
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"column": "AlbumId",
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@ -22,11 +22,6 @@
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"column": "ArtistId",
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"fields": null
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},
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"__hasura_phantom_field__ArtistId": {
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"type": "column",
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"column": "ArtistId",
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"fields": null
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},
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"Tracks": {
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"type": "relationship",
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"query": {
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@ -21,16 +21,6 @@
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"type": "column",
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"column": "ArtistId",
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"fields": null
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},
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"__hasura_phantom_field__AlbumId": {
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"type": "column",
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"column": "AlbumId",
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"fields": null
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},
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"__hasura_phantom_field__ArtistId": {
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"type": "column",
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"column": "ArtistId",
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"fields": null
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}
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}
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},
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@ -21,11 +21,6 @@
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"type": "column",
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"column": "first_name",
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"fields": null
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},
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"__hasura_phantom_field__id": {
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"type": "column",
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"column": "id",
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"fields": null
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}
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}
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},
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