fix: Handle reserved words in db, schema and table names with the `no…

…rmalize_name` dialect helper

Co-authored-by: Pat Nadolny <[email protected]>

.github/workflows/test.yml

@@ -21,12 +21,15 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-        - "3.8"
-        - "3.9"
-        - "3.10"
-        - "3.11"
         - "3.12"
-        os: ["ubuntu-latest", "macos-latest", "windows-latest"]
+        # - "3.11"
+        # - "3.10"
+        # - "3.9"
+        # - "3.8"
+        os:
+        - "ubuntu-latest"
+        # - "macos-latest"
+        # - "windows-latest"
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}

target_snowflake/connector.py

@@ -12,7 +12,7 @@
 from snowflake.sqlalchemy import URL
 from snowflake.sqlalchemy.base import SnowflakeIdentifierPreparer
 from snowflake.sqlalchemy.snowdialect import SnowflakeDialect
-from sqlalchemy.sql import quoted_name, text
+from sqlalchemy.sql import text
 
 from target_snowflake.snowflake_types import NUMBER, TIMESTAMP_NTZ, VARIANT
 
@@ -61,6 +61,11 @@ def __init__(self, *args: Any, **kwargs: Any) -> None:
         self.schema_cache: dict = {}
         super().__init__(*args, **kwargs)
 
+    @property
+    def dialect(self) -> SnowflakeDialect:
+        """Return a Snowflake dialect instance."""
+        return self._engine.dialect
+
     def get_table_columns(
         self,
         full_table_name: str,
@@ -388,7 +393,7 @@ def _get_merge_from_stage_statement(  # noqa: ANN202
         dedup = f"QUALIFY ROW_NUMBER() OVER (PARTITION BY {dedup_cols} ORDER BY SEQ8() DESC) = 1"
         return (
             text(
-                f"merge into {quoted_name(full_table_name, quote=True)} d using "  # noqa: ISC003
+                f"merge into {full_table_name} d using "  # noqa: ISC003
                 + f"(select {json_casting_selects} from '@~/target-snowflake/{sync_id}'"  # noqa: S608
                 + f"(file_format => {file_format}) {dedup}) s "
                 + f"on {join_expr} "

target_snowflake/sinks.py

@@ -29,7 +29,7 @@
 }
 
 
-class SnowflakeSink(SQLSink):
+class SnowflakeSink(SQLSink[SnowflakeConnector]):
     """Snowflake target sink class."""
 
     connector_class = SnowflakeConnector
@@ -64,7 +64,8 @@ def database_name(self) -> str | None:
 
     @property
     def table_name(self) -> str:
-        return super().table_name.upper()
+        table = super().table_name
+        return self.connector.dialect.identifier_preparer.quote(table).upper()
 
     def setup(self) -> None:
         """Set up Sink.

tests/core.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import typing as t
 from pathlib import Path
 
 import pytest
@@ -25,6 +26,9 @@
 )
 from singer_sdk.testing.templates import TargetFileTestTemplate
 
+if t.TYPE_CHECKING:
+    from target_snowflake.connector import SnowflakeConnector
+
 
 class SnowflakeTargetArrayData(TargetArrayData):
     def validate(self) -> None:
@@ -65,7 +69,7 @@ def validate(self) -> None:
 
 class SnowflakeTargetCamelcaseComplexSchema(TargetCamelcaseComplexSchema):
     def validate(self) -> None:
-        connector = self.target.default_sink_class.connector_class(self.target.config)
+        connector: SnowflakeConnector = self.target.default_sink_class.connector_class(self.target.config)
         table = f"{self.target.config['database']}.{self.target.config['default_target_schema']}.ForecastingTypeToCategory".upper()  # noqa: E501
         table_schema = connector.get_table(table)
         expected_types = {
@@ -458,6 +462,61 @@ def setup(self) -> None:
         )
 
 
+class SnowflakeTargetExistingReservedNameTableAlter(TargetFileTestTemplate):
+    name = "existing_reserved_name_table_alter"
+    # This sends a schema that will request altering from TIMESTAMP_NTZ to VARCHAR
+
+    @property
+    def singer_filepath(self) -> Path:
+        current_dir = Path(__file__).resolve().parent
+        return current_dir / "target_test_streams" / "reserved_words_in_table.singer"
+
+    def setup(self) -> None:
+        connector = self.target.default_sink_class.connector_class(self.target.config)
+        table = f"{self.target.config['database']}.{self.target.config['default_target_schema']}.\"order\"".upper()
+        connector.connection.execute(
+            f"""
+            CREATE OR REPLACE TABLE {table} (
+                ID VARCHAR(16777216),
+                COL_STR VARCHAR(16777216),
+                COL_TS TIMESTAMP_NTZ(9),
+                COL_INT STRING,
+                COL_BOOL BOOLEAN,
+                COL_VARIANT VARIANT,
+                _SDC_BATCHED_AT TIMESTAMP_NTZ(9),
+                _SDC_DELETED_AT VARCHAR(16777216),
+                _SDC_EXTRACTED_AT TIMESTAMP_NTZ(9),
+                _SDC_RECEIVED_AT TIMESTAMP_NTZ(9),
+                _SDC_SEQUENCE NUMBER(38,0),
+                _SDC_TABLE_VERSION NUMBER(38,0),
+                PRIMARY KEY (ID)
+            )
+            """,
+        )
+
+
+class SnowflakeTargetReservedWordsInTable(TargetFileTestTemplate):
+    # Contains reserved words from
+    # https://docs.snowflake.com/en/sql-reference/reserved-keywords
+    # Syncs records then alters schema by adding a non-reserved word column.
+    name = "reserved_words_in_table"
+
+    @property
+    def singer_filepath(self) -> Path:
+        current_dir = Path(__file__).resolve().parent
+        return current_dir / "target_test_streams" / "reserved_words_in_table.singer"
+
+    def validate(self) -> None:
+        connector = self.target.default_sink_class.connector_class(self.target.config)
+        table = f"{self.target.config['database']}.{self.target.config['default_target_schema']}.\"order\"".upper()
+        result = connector.connection.execute(
+            f"select * from {table}",
+        )
+        assert result.rowcount == 1
+        row = result.first()
+        assert len(row) == 13, f"Row has unexpected length {len(row)}"
+
+
 class SnowflakeTargetTypeEdgeCasesTest(TargetFileTestTemplate):
     name = "type_edge_cases"
 
@@ -540,6 +599,8 @@ def singer_filepath(self) -> Path:
         SnowflakeTargetColonsInColName,
         SnowflakeTargetExistingTable,
         SnowflakeTargetExistingTableAlter,
+        SnowflakeTargetExistingReservedNameTableAlter,
+        SnowflakeTargetReservedWordsInTable,
         SnowflakeTargetTypeEdgeCasesTest,
         SnowflakeTargetColumnOrderMismatch,
     ],

tests/target_test_streams/reserved_words_in_table.singer

@@ -0,0 +1,2 @@
+{ "type": "SCHEMA", "stream": "order", "schema": { "properties": { "id": { "type": [ "string", "null" ] }, "col_str": { "type": [ "string", "null" ] }, "col_ts": { "format": "date-time", "type": [ "string", "null" ] }, "col_int": { "type": "integer" }, "col_bool": { "type": [ "boolean", "null" ] }, "col_variant": {"type": "object"} }, "type": "object" }, "key_properties": [ "id" ], "bookmark_properties": [ "col_ts" ] }
+{ "type": "RECORD", "stream": "order", "record": { "id": "123", "col_str": "foo", "col_ts": "2023-06-13 11:50:04.072", "col_int": 5, "col_bool": true, "col_variant": {"key": "val"} }, "time_extracted": "2023-06-14T18:08:23.074716+00:00" }