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refactor: simplify join conditions logic

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steve-chavez
2022-10-19 19:49:43 -05:00
committed by Steve Chavez
parent 922da4520f
commit 5f5a0c7764
5 changed files with 52 additions and 58 deletions
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src/PostgREST/Query/QueryBuilder.hs
+6 -6
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@@ -39,14 +39,14 @@ import PostgREST.RangeQuery (allRange)
import Protolude
readPlanToQuery :: ReadPlanTree -> SQL.Snippet
readPlanToQuery (Node ReadPlan{select,from=mainQi,fromAlias,where_=logicForest,joinConditions, order, range_=readRange, relToParent} forest) =
readPlanToQuery (Node ReadPlan{select,from=mainQi,fromAlias,where_=logicForest,order, range_=readRange, relToParent, relJoinConds} forest) =
"SELECT " <>
intercalateSnippet ", " ((pgFmtSelectItem qi <$> select) ++ selects) <> " " <>
fromFrag <> " " <>
intercalateSnippet " " joins <> " " <>
(if null logicForest && null joinConditions
(if null logicForest && null relJoinConds
then mempty
else "WHERE " <> intercalateSnippet " AND " (map (pgFmtLogicTree qi) logicForest ++ map pgFmtJoinCondition joinConditions)) <> " " <>
else "WHERE " <> intercalateSnippet " AND " (map (pgFmtLogicTree qi) logicForest ++ map pgFmtJoinCondition relJoinConds)) <> " " <>
orderF qi order <> " " <>
limitOffsetF readRange
where
@@ -225,14 +225,14 @@ callPlanToQuery (FunctionCall qi params args returnsScalar multipleCall returnin
-- See https://github.com/PostgREST/postgrest/issues/2009#issuecomment-977473031
-- Only for the nodes that have an INNER JOIN linked to the root level.
readPlanToCountQuery :: ReadPlanTree -> SQL.Snippet
readPlanToCountQuery (Node ReadPlan{from=mainQi, fromAlias=tblAlias, where_=logicForest, joinConditions=joinConditions_, relToParent=rel} forest) =
readPlanToCountQuery (Node ReadPlan{from=mainQi, fromAlias=tblAlias, where_=logicForest, relToParent=rel, relJoinConds} forest) =
"SELECT 1 " <> fromFrag <>
(if null logicForest && null joinConditions_ && null subQueries
(if null logicForest && null relJoinConds && null subQueries
then mempty
else " WHERE " ) <>
intercalateSnippet " AND " (
map (pgFmtLogicTree qi) logicForest ++
map pgFmtJoinCondition joinConditions_ ++
map pgFmtJoinCondition relJoinConds ++
subQueries
)
where