allow distinct in aggregate functions

Author: pfilsx

src/ORM/Query/AST/Functions/ArrayAgg.php

@@ -15,22 +15,33 @@
  * @see https://www.postgresql.org/docs/current/functions-aggregate.html#FUNCTIONS-AGGREGATE-TABLE
  *
  * @example ARRAY_AGG(entity.field)
+ * @example ARRAY_AGG(DISTINCT entity.field)
  * @example ARRAY_AGG(entity.field) FILTER (WHERE entity.field IS NOT NULL)
+ * @example ARRAY_AGG(DISTINCT entity.field) FILTER (WHERE entity.field IS NOT NULL)
  */
 final class ArrayAgg extends AggregateWithFilterFunction
 {
+    private bool $distinct = false;
+
     private Node $expr;
 
     public function parseFunction(Parser $parser): void
     {
         $parser->match(Lexer::T_IDENTIFIER);
         $parser->match(Lexer::T_OPEN_PARENTHESIS);
+
+        $lexer = $parser->getLexer();
+        if ($lexer->isNextToken(Lexer::T_DISTINCT)) {
+            $parser->match(Lexer::T_DISTINCT);
+            $this->distinct = true;
+        }
+
         $this->expr = $parser->StringPrimary();
         $parser->match(Lexer::T_CLOSE_PARENTHESIS);
     }
 
     public function getFunctionSql(SqlWalker $sqlWalker): string
     {
-        return "ARRAY_AGG({$this->expr->dispatch($sqlWalker)})";
+        return sprintf('ARRAY_AGG(%s%s)', $this->distinct ? 'DISTINCT ' : '', $this->expr->dispatch($sqlWalker));
     }
 }

src/ORM/Query/AST/Functions/JsonAgg.php

@@ -15,22 +15,33 @@
  * @see https://www.postgresql.org/docs/current/functions-aggregate.html#FUNCTIONS-AGGREGATE-TABLE
  *
  * @example JSON_AGG(entity.field)
+ * @example JSON_AGG(DISTINCT entity.field)
  * @example JSON_AGG(entity.field) FILTER (WHERE entity.field IS NOT NULL)
+ * @example JSON_AGG(DISTINCT entity.field) FILTER (WHERE entity.field IS NOT NULL)
  */
 final class JsonAgg extends AggregateWithFilterFunction
 {
+    private bool $distinct = false;
+
     private Node $expr;
 
     public function parseFunction(Parser $parser): void
     {
         $parser->match(Lexer::T_IDENTIFIER);
         $parser->match(Lexer::T_OPEN_PARENTHESIS);
+
+        $lexer = $parser->getLexer();
+        if ($lexer->isNextToken(Lexer::T_DISTINCT)) {
+            $parser->match(Lexer::T_DISTINCT);
+            $this->distinct = true;
+        }
+
         $this->expr = $parser->StringPrimary();
         $parser->match(Lexer::T_CLOSE_PARENTHESIS);
     }
 
     public function getFunctionSql(SqlWalker $sqlWalker): string
     {
-        return "JSON_AGG({$this->expr->dispatch($sqlWalker)})";
+        return sprintf('JSON_AGG(%s%s)', $this->distinct ? 'DISTINCT ' : '', $this->expr->dispatch($sqlWalker));
     }
 }

src/ORM/Query/AST/Functions/JsonbAgg.php

@@ -19,18 +19,27 @@
  */
 final class JsonbAgg extends AggregateWithFilterFunction
 {
+    private bool $distinct = false;
+
     private Node $expr;
 
     public function parseFunction(Parser $parser): void
     {
         $parser->match(Lexer::T_IDENTIFIER);
         $parser->match(Lexer::T_OPEN_PARENTHESIS);
+
+        $lexer = $parser->getLexer();
+        if ($lexer->isNextToken(Lexer::T_DISTINCT)) {
+            $parser->match(Lexer::T_DISTINCT);
+            $this->distinct = true;
+        }
+
         $this->expr = $parser->StringPrimary();
         $parser->match(Lexer::T_CLOSE_PARENTHESIS);
     }
 
     public function getFunctionSql(SqlWalker $sqlWalker): string
     {
-        return "JSON_AGG({$this->expr->dispatch($sqlWalker)})";
+        return sprintf('JSONB_AGG(%s%s)', $this->distinct ? 'DISTINCT ' : '', $this->expr->dispatch($sqlWalker));
     }
 }