From e8175b939284e82fb71e8f31fbafddca24ebf958 Mon Sep 17 00:00:00 2001
From: Lukas Eder <lukas.eder@gmail.com>
Date: Fri, 16 Dec 2022 16:26:21 +0100
Subject: [PATCH] [jOOQ/jOOQ#14416] Support UNNEST(ARRAY[...]) in dialects that
 do not otherwise support arrays

---
 jOOQ/src/main/java/org/jooq/impl/Array.java   |  2 +-
 .../main/java/org/jooq/impl/ArrayTable.java   | 19 ++++++++++++++++---
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/jOOQ/src/main/java/org/jooq/impl/Array.java b/jOOQ/src/main/java/org/jooq/impl/Array.java
index 227e1f7b5f..a4dcea969a 100644
--- a/jOOQ/src/main/java/org/jooq/impl/Array.java
+++ b/jOOQ/src/main/java/org/jooq/impl/Array.java
@@ -67,7 +67,7 @@ final class Array<T> extends AbstractField<T[]> implements QOM.Array<T> {
 
     private static final Set<SQLDialect> REQUIRES_CAST = SQLDialect.supportedBy(POSTGRES, YUGABYTEDB);
 
-    private final FieldsImpl<Record>     fields;
+    final FieldsImpl<Record>             fields;
 
     Array(Collection<? extends Field<T>> fields) {
         super(N_ARRAY, type(fields));
diff --git a/jOOQ/src/main/java/org/jooq/impl/ArrayTable.java b/jOOQ/src/main/java/org/jooq/impl/ArrayTable.java
index 480343756f..28d730d7d4 100644
--- a/jOOQ/src/main/java/org/jooq/impl/ArrayTable.java
+++ b/jOOQ/src/main/java/org/jooq/impl/ArrayTable.java
@@ -177,6 +177,8 @@ implements
     }
 
     private final QueryPart table(Configuration configuration) {
+        boolean isArray = array.getDataType().getType().isArray();
+
         switch (configuration.family()) {
 
 
@@ -187,6 +189,8 @@ implements
 
 
 
+
+
             // Most dialects can simulate unnested arrays using UNION ALL
 
 
@@ -211,8 +215,12 @@ implements
             case MARIADB:
             case MYSQL:
             case SQLITE:
-                if (array.getDataType().getType().isArray() && array instanceof Param)
-                    return emulate();
+                if (isArray && array instanceof Param)
+                    return emulateParam();
+
+                // [#14416] While Array isn't supported everywhere, Unnest(Array) is
+                else if (isArray && array instanceof Array)
+                    return emulateArray();
 
 
 
@@ -283,7 +291,12 @@ implements
     }
 
     @SuppressWarnings("unchecked")
-    private final QueryPart emulate() {
+    private final QueryPart emulateParam() {
         return new ArrayTableEmulation(((Param<Object[]>) array).getValue(), fieldAliases);
     }
+
+    @SuppressWarnings("unchecked")
+    private final QueryPart emulateArray() {
+        return new ArrayTableEmulation(((Array<Object>) array).fields.fields, fieldAliases);
+    }
 }