Merge pull request #339 from iamchanii/main

feat: add support for backtick-quoted identifiers

Author: DerekStride

grammar.js

@@ -3660,6 +3660,7 @@ module.exports = grammar({
       ),
     ),
     _double_quote_string: _ => /"[^"]*"/,
+    _backtick_quoted_string: _ => /`[^`]*`/,
     // The norm specify that between two consecutive string must be a return,
     // but this is good enough.
     _single_quote_string: _ => seq(/([uU]&|[nN])?'([^']|'')*'/, repeat(/'([^']|'')*'/)),
@@ -3694,6 +3695,7 @@ module.exports = grammar({
     identifier: $ => choice(
       $._identifier,
       $._double_quote_string,
+      $._backtick_quoted_string,
       $._tsql_parameter,
       seq("`", $._identifier, "`"),
     ),

test/corpus/select.txt

@@ -3129,3 +3129,87 @@ SELECT col1, col2, col3 into alpha, beta, gamma FROM my_table;
       (relation
         (object_reference
           name: (identifier))))))
+
+================================================================================
+Select from table with bare identifier
+================================================================================
+
+SELECT * FROM table_name;
+
+--------------------------------------------------------------------------------
+
+(program
+  (statement
+    (select
+      (keyword_select)
+      (select_expression
+        (term
+          value: (all_fields))))
+    (from
+      (keyword_from)
+      (relation
+        (object_reference
+          name: (identifier))))))
+
+================================================================================
+Select from table with backtick-quoted identifier
+================================================================================
+
+SELECT * FROM `table_name`;
+
+--------------------------------------------------------------------------------
+
+(program
+  (statement
+    (select
+      (keyword_select)
+      (select_expression
+        (term
+          value: (all_fields))))
+    (from
+      (keyword_from)
+      (relation
+        (object_reference
+          name: (identifier))))))
+
+================================================================================
+Select from table with double-quoted identifier
+================================================================================
+
+SELECT * FROM "table_name";
+
+--------------------------------------------------------------------------------
+
+(program
+  (statement
+    (select
+      (keyword_select)
+      (select_expression
+        (term
+          value: (all_fields))))
+    (from
+      (keyword_from)
+      (relation
+        (object_reference
+          name: (identifier))))))
+
+================================================================================
+Select from table with identifiers containing hyphens, dots, or other special characters within backticks
+================================================================================
+
+SELECT * FROM `complex-database.schema_name.table_name`;
+
+--------------------------------------------------------------------------------
+
+(program
+  (statement
+    (select
+      (keyword_select)
+      (select_expression
+        (term
+          value: (all_fields))))
+    (from
+      (keyword_from)
+      (relation
+        (object_reference
+          name: (identifier))))))