fix(schema-compiler): yml backtick escaping (#6478)

Author: vasilev-alex

packages/cubejs-schema-compiler/src/compiler/YamlCompiler.ts

@@ -143,6 +143,11 @@ export class YamlCompiler {
       } else if (str[i] === '"' && peek().inStr) {
         result.push(str[i]);
         stateStack.pop();
+      } else if (str[i] === '`' && stateStack.length === 0) {
+        result.push('\\`');
+      } else if (str[i] === '`' && peek().inStr) {
+        result.push(str[i]);
+        stateStack.pop();
       } else if (str[i] === '{' && str[i + 1] === '{' && peek()?.inFormattedStr) {
         result.push('{{');
         i += 1;

packages/cubejs-schema-compiler/test/unit/yaml-schema.test.ts

@@ -38,4 +38,23 @@ describe('Yaml Schema Testing', () => {
 
     await compiler.compile();
   });
+
+  it('escapes backticks', async () => {
+    const { compiler } = prepareYamlCompiler(
+      `cubes:
+  - name: Users
+    sql: SELECT * FROM e2e.users
+    dimensions:
+      - name: id
+        sql: id
+        type: number
+        primaryKey: true
+      - name: c2
+        sql: "{CUBE}.\`C2\`"
+        type: string
+      `
+    );
+
+    await compiler.compile();
+  });
 });