Safe Haskell	Safe-Inferred
Language	Haskell2010

Hasura.Backends.Postgres.Translate.Select.Internal.Extractor

Description

Extractors are a pair of an SQL expression and an alias; they get translated like "[SELECT ...] expr as alias"

Synopsis

aggregateFieldsToExtractorExps :: forall pgKind. Backend ('Postgres pgKind) => TableIdentifier -> AggregateFields ('Postgres pgKind) SQLExp -> [(ColumnAlias, SQLExp)]
mkAggregateOrderByExtractorAndFields :: forall pgKind. Backend ('Postgres pgKind) => TableIdentifier -> AnnotatedAggregateOrderBy ('Postgres pgKind) SQLExp -> (Extractor, AggregateFields ('Postgres pgKind) SQLExp)
mkRawComputedFieldExpression :: forall pgKind. Backend ('Postgres pgKind) => TableIdentifier -> ComputedFieldScalarSelect ('Postgres pgKind) SQLExp -> SQLExp
withJsonAggExtr :: PermissionLimitSubQuery -> Maybe OrderByExp -> ColumnAlias -> SQLExp
asSingleRowExtr :: ColumnAlias -> SQLExp
asJsonAggExtr :: JsonAggSelect -> ColumnAlias -> PermissionLimitSubQuery -> Maybe OrderByExp -> Extractor
withColumnOp :: Maybe ColumnOp -> SQLExp -> SQLExp
withRedactionExp :: Backend ('Postgres pgKind) => Qual -> AnnRedactionExp ('Postgres pgKind) SQLExp -> SQLExp -> SQLExp

Documentation

aggregateFieldsToExtractorExps :: forall pgKind. Backend ('Postgres pgKind) => TableIdentifier -> AggregateFields ('Postgres pgKind) SQLExp -> [(ColumnAlias, SQLExp)] Source #

Creates node extractors for all of the columns and computed fields used in aggregated fields. The ColumnAliases for all the extractors are namespaced aliases using the 'contextualize*` functions so that none of the extractors names will conflict with one another (for example, if a column name is the same as a field name (eg nodes))

mkAggregateOrderByExtractorAndFields :: forall pgKind. Backend ('Postgres pgKind) => TableIdentifier -> AnnotatedAggregateOrderBy ('Postgres pgKind) SQLExp -> (Extractor, AggregateFields ('Postgres pgKind) SQLExp) Source #

mkRawComputedFieldExpression :: forall pgKind. Backend ('Postgres pgKind) => TableIdentifier -> ComputedFieldScalarSelect ('Postgres pgKind) SQLExp -> SQLExp Source #

withJsonAggExtr :: PermissionLimitSubQuery -> Maybe OrderByExp -> ColumnAlias -> SQLExp Source #

asSingleRowExtr :: ColumnAlias -> SQLExp Source #

asJsonAggExtr :: JsonAggSelect -> ColumnAlias -> PermissionLimitSubQuery -> Maybe OrderByExp -> Extractor Source #

withColumnOp :: Maybe ColumnOp -> SQLExp -> SQLExp Source #

withRedactionExp :: Backend ('Postgres pgKind) => Qual -> AnnRedactionExp ('Postgres pgKind) SQLExp -> SQLExp -> SQLExp Source #