fix(destination-bigquery): Add backticks to column names in SQL generation to prevent syntax errors (#67401)

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Edward Gao <[email protected]>

Author: devin-ai-integration[bot]

airbyte-integrations/connectors/destination-bigquery/metadata.yaml

@@ -6,7 +6,7 @@ data:
   connectorSubtype: database
   connectorType: destination
   definitionId: 22f6c74f-5699-40ff-833c-4a879ea40133
-  dockerImageTag: 3.0.15
+  dockerImageTag: 3.0.16
   dockerRepository: airbyte/destination-bigquery
   documentationUrl: https://docs.airbyte.com/integrations/destinations/bigquery
   githubIssueLabel: destination-bigquery

airbyte-integrations/connectors/destination-bigquery/src/main/kotlin/io/airbyte/integrations/destination/bigquery/write/typing_deduping/direct_load_tables/BigqueryTableSchemaEvolutionClient.kt

@@ -214,18 +214,18 @@ class BigqueryTableSchemaEvolutionClient(
             // but that seems like a weird enough situation that we shouldn't worry about it.
             return """
                 CAST(
-                  CASE JSON_TYPE($columnName)
-                    WHEN 'object' THEN TO_JSON_STRING($columnName)
-                    WHEN 'array' THEN TO_JSON_STRING($columnName)
-                    ELSE JSON_VALUE($columnName)
+                  CASE JSON_TYPE(`$columnName`)
+                    WHEN 'object' THEN TO_JSON_STRING(`$columnName`)
+                    WHEN 'array' THEN TO_JSON_STRING(`$columnName`)
+                    ELSE JSON_VALUE(`$columnName`)
                   END
                   AS $newType
                 )
                 """.trimIndent()
         } else if (newType == StandardSQLTypeName.JSON) {
-            return "TO_JSON($columnName)"
+            return "TO_JSON(`$columnName`)"
         } else {
-            return "CAST($columnName AS $newType)"
+            return "CAST(`$columnName` AS $newType)"
         }
     }
 
@@ -394,12 +394,12 @@ class BigqueryTableSchemaEvolutionClient(
             databaseHandler.executeWithRetries(
                 """
                 ALTER TABLE $tableId
-                  RENAME COLUMN `$realColumnName` TO $backupColumnName,
-                  RENAME COLUMN `$tempColumnName` TO $realColumnName
+                  RENAME COLUMN `$realColumnName` TO `$backupColumnName`,
+                  RENAME COLUMN `$tempColumnName` TO `$realColumnName`
                 """.trimIndent(),
             )
             databaseHandler.executeWithRetries(
-                """ALTER TABLE $tableId DROP COLUMN $backupColumnName""",
+                """ALTER TABLE $tableId DROP COLUMN `$backupColumnName`""",
             )
         }
     }

docs/integrations/destinations/bigquery.md

@@ -210,6 +210,7 @@ tutorials:
 
 | Version     | Date       | Pull Request                                               | Subject                                                                                                                                                                           |
 |:------------|:-----------|:-----------------------------------------------------------|:----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| 3.0.16 | 2025-11-25 | [67401](https://github.com/airbytehq/airbyte/pull/67401) | Add backticks to column names in SQL generation to prevent syntax errors. |
 | 3.0.15 | 2025-11-12 | [69307](https://github.com/airbytehq/airbyte/pull/69307) | Handle out-of-range timestamps/times. |
 | 3.0.14 | 2025-11-11 | [69231](https://github.com/airbytehq/airbyte/pull/69231) | Upgrade to Bulk CDK 0.1.74. |
 | 3.0.13 | 2025-11-01 | [69126](https://github.com/airbytehq/airbyte/pull/69126) | Upgrade to Bulk CDK 0.1.61. |