Support row constructors

Author: pplam

grammar.js

@@ -1249,6 +1249,8 @@ module.exports = grammar({
     array_element_access: $ =>
       seq(choice($.identifier, $.argument_reference), "[", $._expression, "]"),
 
+    row_constructor: $ => seq(kw("ROW"), "(", commaSep($._expression), ")"),
+
     unary_expression: $ =>
       prec(
         PREC.unary,
@@ -1321,6 +1323,7 @@ module.exports = grammar({
         $.at_time_zone_expression,
         $.rows_from_expression,
         $.array_constructor,
+        $.row_constructor,
       ),
   },
 });

src/grammar.json

@@ -11786,6 +11786,61 @@
         }
       ]
     },
+    "row_constructor": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "ALIAS",
+          "content": {
+            "type": "PATTERN",
+            "value": "[rR][oO][wW]"
+          },
+          "named": false,
+          "value": "ROW"
+        },
+        {
+          "type": "STRING",
+          "value": "("
+        },
+        {
+          "type": "CHOICE",
+          "members": [
+            {
+              "type": "SEQ",
+              "members": [
+                {
+                  "type": "SYMBOL",
+                  "name": "_expression"
+                },
+                {
+                  "type": "REPEAT",
+                  "content": {
+                    "type": "SEQ",
+                    "members": [
+                      {
+                        "type": "STRING",
+                        "value": ","
+                      },
+                      {
+                        "type": "SYMBOL",
+                        "name": "_expression"
+                      }
+                    ]
+                  }
+                }
+              ]
+            },
+            {
+              "type": "BLANK"
+            }
+          ]
+        },
+        {
+          "type": "STRING",
+          "value": ")"
+        }
+      ]
+    },
     "unary_expression": {
       "type": "PREC",
       "value": 7,
@@ -12239,6 +12294,10 @@
         {
           "type": "SYMBOL",
           "name": "array_constructor"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "row_constructor"
         }
       ]
     }