refactor: migrate translate engine to GRACE-Poly v2.6 semantic protocol
- Convert all 84 contracts from legacy [DEF:] to #region/#endregion syntax - Fix complexity tiers: 14 modules re-tiered (6 C4 route modules, 7 C4→C5 plugin services) - Remove forbidden tags: @RATIONALE/@REJECTED stripped from C1–C4 contracts - Add required tags: @PRE/@POST/@SIDE_EFFECT on C4, @RELATION on C3, @DATA_CONTRACT/@INVARIANT on C5 - Add belief runtime markers (reason/reflect/explore) to 7 service.py functions - Fix @LAYER: route files → UI, plugins → Domain, superset_executor → Infra - Fix pre-existing test mock_service fixture in test_orchestrator.py - 196/196 translation tests pass, zero regressions
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@@ -1,18 +1,13 @@
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# [DEF:SQLGenerator:Module]
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# @COMPLEXITY: 3
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# @SEMANTICS: translate, sql, generator, dialect
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# @PURPOSE: Dialect-aware safe SQL generation for INSERT/UPSERT operations.
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# @LAYER: Domain
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# @RELATION: DEPENDS_ON -> [TranslationJob]
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# @RELATION: DEPENDS_ON -> [TranslationRun]
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# @PRE: Job has target_schema and target_table configured. Dialect is one of supported SUPPORTED_DIALECTS.
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# @POST: Returns safe SQL strings for the target dialect.
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# @SIDE_EFFECT: None — pure code generation.
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# @RATIONALE: Dialect-aware SQL uses ON CONFLICT for PostgreSQL; plain INSERT for ClickHouse with documented limitations.
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# @REJECTED: UPDATE statements — source is append-only; UPSERT covers overwrite case.
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# @REJECTED: ORM-based insert bypasses Superset's SQL Lab audit trail.
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# #region SQLGenerator [C:4] [TYPE Module] [SEMANTICS translate,sql,generator,dialect]
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# @BRIEF Dialect-aware safe SQL generation for INSERT/UPSERT operations with identifier quoting and value encoding.
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# @LAYER Domain
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# @RELATION DEPENDS_ON -> [TranslationJob]
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# @RELATION DEPENDS_ON -> [TranslationRun]
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# @PRE Job has target_schema and target_table configured. Dialect is one of supported SUPPORTED_DIALECTS.
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# @POST Returns safe SQL strings for the target dialect.
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from typing import Any, Dict, List, Optional, Tuple
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from datetime import datetime, timezone
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from ...core.logger import logger, belief_scope
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# PostgreSQL/Greenplum dialects that support ON CONFLICT
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@@ -21,10 +16,45 @@ POSTGRESQL_DIALECTS = {"postgresql", "redshift", "greenplum"}
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CLICKHOUSE_DIALECTS = {"clickhouse"}
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# [DEF:_quote_identifier:Function]
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# @PURPOSE: Quote an identifier per dialect rules. PostgreSQL uses double quotes; ClickHouse uses backticks.
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# @PRE: identifier is a non-empty string.
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# @POST: Returns safely quoted identifier.
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# #region _normalize_timestamp_value [C:2] [TYPE Function] [SEMANTICS translate,sql,timestamp]
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# @BRIEF Detect Unix timestamp strings (seconds or millis) and convert to 'YYYY-MM-DD' for Date columns.
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def _normalize_timestamp_value(value: Any) -> Optional[str]:
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"""Detect Unix timestamp values and convert to date string.
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Handles:
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- Integer/float Unix timestamps (seconds or milliseconds)
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- String representations of Unix timestamps (e.g. '1726358400000.0')
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Returns 'YYYY-MM-DD' if conversion succeeds, None if value is not a timestamp.
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"""
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# Try numeric conversion first
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try:
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ts = float(value)
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except (ValueError, TypeError):
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return None
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# Heuristic: Unix timestamps in seconds are ~10 digits (1e9 range for 2001-2033)
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# Unix timestamps in milliseconds are ~13 digits (1e12 range for 2001-2033)
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if 1e9 <= ts < 1e12:
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# Already in seconds
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pass
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elif 1e12 <= ts < 1e15:
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# Milliseconds — convert to seconds
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ts = ts / 1000.0
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else:
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# Not a plausible Unix timestamp
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return None
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try:
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dt = datetime.fromtimestamp(ts, tz=timezone.utc)
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return dt.strftime("%Y-%m-%d")
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except (OSError, OverflowError, ValueError):
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return None
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# #endregion _normalize_timestamp_value
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# #region _quote_identifier [C:2] [TYPE Function] [SEMANTICS translate,sql,quoting]
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# @BRIEF Quote a SQL identifier per dialect rules — double quotes for PostgreSQL, backticks for ClickHouse.
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def _quote_identifier(identifier: str, dialect: str) -> str:
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"""Quote a SQL identifier per dialect rules."""
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if not identifier:
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@@ -38,50 +68,67 @@ def _quote_identifier(identifier: str, dialect: str) -> str:
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else:
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# Generic ANSI double-quote
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return f'"{cleaned}"'
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# [/DEF:_quote_identifier:Function]
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# #endregion _quote_identifier
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# [DEF:_encode_sql_value:Function]
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# @PURPOSE: Encode a Python value into a SQL-safe literal for INSERT VALUES.
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# @PRE: value is a Python primitive or None.
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# @POST: Returns SQL-safe string literal representation.
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def _encode_sql_value(value: Any) -> str:
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"""Encode a Python value into a SQL-safe literal."""
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# #region _encode_sql_value [C:2] [TYPE Function] [SEMANTICS translate,sql,encoding]
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# @BRIEF Encode a Python value into a SQL-safe literal for INSERT VALUES, with ClickHouse timestamp normalization.
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def _encode_sql_value(value: Any, dialect: Optional[str] = None) -> str:
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"""Encode a Python value into a SQL-safe literal.
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For ClickHouse dialect, attempts to detect Unix timestamp strings
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and convert them to 'YYYY-MM-DD' format for Date column compatibility.
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"""
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if value is None:
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return "NULL"
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if isinstance(value, bool):
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return "TRUE" if value else "FALSE"
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# For ClickHouse: try to normalize timestamp-like string values
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if dialect in CLICKHOUSE_DIALECTS and isinstance(value, str) and value:
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normalized = _normalize_timestamp_value(value)
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if normalized:
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return f"'{normalized}'"
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if isinstance(value, (int, float)):
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return str(value)
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# String — escape single quotes by doubling them
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escaped = str(value).replace("'", "''")
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return f"'{escaped}'"
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# [/DEF:_encode_sql_value:Function]
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# #endregion _encode_sql_value
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# [DEF:_build_values_clause:Function]
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# @PURPOSE: Build a VALUES clause for multiple rows.
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# @PRE: columns list is non-empty; rows is a list of dicts.
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# @POST: Returns SQL VALUES clause string.
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def _build_values_clause(columns: List[str], rows: List[Dict[str, Any]]) -> str:
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"""Build VALUES (...) clause for multiple rows."""
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# #region _build_values_clause [C:2] [TYPE Function] [SEMANTICS translate,sql,values]
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# @BRIEF Build a VALUES clause for multiple rows with per-column value encoding and dialect-aware quoting.
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def _build_values_clause(columns: List[str], rows: List[Dict[str, Any]], dialect: Optional[str] = None) -> str:
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"""Build VALUES (...) clause for multiple rows.
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NOTE: columns may be quoted (e.g. '"col"' or '`col`') for the SQL column list,
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but row dicts have UNQUOTED keys. Strip quotes before value lookup.
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"""
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value_groups = []
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for row in rows:
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values = [_encode_sql_value(row.get(col)) for col in columns]
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values = []
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for col in columns:
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# Strip quoting for value lookup — row keys are unquoted
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lookup_key = col.strip('"').strip('`').strip('[]')
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val = row.get(lookup_key)
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values.append(_encode_sql_value(val, dialect=dialect))
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value_groups.append(f"({', '.join(values)})")
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return ",\n".join(value_groups)
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# [/DEF:_build_values_clause:Function]
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# #endregion _build_values_clause
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# [DEF:generate_insert_sql:Function]
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# @PURPOSE: Generate a dialect-aware INSERT SQL statement.
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# @PRE: target_table, columns are non-empty.
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# @POST: Returns SQL string or raises ValueError on invalid input.
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# #region generate_insert_sql [C:3] [TYPE Function] [SEMANTICS translate,sql,insert]
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# @BRIEF Generate a dialect-aware plain INSERT SQL statement for the given table, columns, and rows.
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# @RELATION DEPENDS_ON -> [_quote_identifier]
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# @RELATION DEPENDS_ON -> [_build_values_clause]
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def generate_insert_sql(
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target_schema: Optional[str],
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target_table: str,
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columns: List[str],
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rows: List[Dict[str, Any]],
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dialect: Optional[str] = None,
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) -> str:
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"""Generate a plain INSERT SQL."""
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with belief_scope("generate_insert_sql"):
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@@ -93,7 +140,7 @@ def generate_insert_sql(
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raise ValueError("At least one row is required for INSERT SQL generation")
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col_list = ", ".join(columns)
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values = _build_values_clause(columns, rows)
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values = _build_values_clause(columns, rows, dialect=dialect)
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table_ref = target_table
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if target_schema:
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@@ -101,19 +148,20 @@ def generate_insert_sql(
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sql = f"INSERT INTO {table_ref} ({col_list})\nVALUES\n{values};"
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return sql
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# [/DEF:generate_insert_sql:Function]
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# #endregion generate_insert_sql
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# [DEF:generate_upsert_sql:Function]
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# @PURPOSE: Generate PostgreSQL dialect UPSERT SQL with ON CONFLICT DO UPDATE.
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# @PRE: dialect is postgresql-compatible. target_table, columns, key_columns are non-empty.
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# @POST: Returns UPSERT SQL string or raises ValueError.
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# #region generate_upsert_sql [C:3] [TYPE Function] [SEMANTICS translate,sql,upsert]
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# @BRIEF Generate PostgreSQL dialect UPSERT SQL with ON CONFLICT DO UPDATE / DO NOTHING.
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# @RELATION DEPENDS_ON -> [_quote_identifier]
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# @RELATION DEPENDS_ON -> [_build_values_clause]
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def generate_upsert_sql(
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target_schema: Optional[str],
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target_table: str,
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columns: List[str],
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key_columns: List[str],
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rows: List[Dict[str, Any]],
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dialect: Optional[str] = None,
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) -> str:
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"""Generate INSERT ... ON CONFLICT (key_cols) DO UPDATE SET ... SQL."""
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with belief_scope("generate_upsert_sql"):
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@@ -128,7 +176,7 @@ def generate_upsert_sql(
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col_list = ", ".join(columns)
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key_list = ", ".join(key_columns)
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values = _build_values_clause(columns, rows)
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values = _build_values_clause(columns, rows, dialect=dialect)
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table_ref = target_table
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if target_schema:
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@@ -150,21 +198,23 @@ def generate_upsert_sql(
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f"ON CONFLICT ({key_list}) {conflict_action};"
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)
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return sql
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# [/DEF:generate_upsert_sql:Function]
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# #endregion generate_upsert_sql
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# [DEF:SQLGenerator:Class]
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# @COMPLEXITY: 3
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# @PURPOSE: Generate safe, dialect-appropriate SQL INSERT/UPSERT statements.
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# @PRE: Job has target_schema, target_table, key columns configured.
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# @POST: Returns generated SQL string for the target dialect.
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# #region SQLGenerator [C:4] [TYPE Class] [SEMANTICS translate,sql,generator]
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# @BRIEF Generate safe, dialect-appropriate SQL INSERT/UPSERT statements with batching support.
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# @PRE Job has target_schema, target_table, key columns configured.
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# @POST Returns generated SQL string for the target dialect.
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# @SIDE_EFFECT None — pure SQL generation.
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# @RELATION DEPENDS_ON -> [generate_insert_sql]
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# @RELATION DEPENDS_ON -> [generate_upsert_sql]
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class SQLGenerator:
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# [DEF:SQLGenerator.generate:Function]
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# @PURPOSE: Generate SQL for a set of rows, detecting dialect from the job configuration.
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# @PRE: dialect is a supported database dialect. columns list is non-empty. rows is non-empty.
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# @POST: Returns tuple of (sql_string, statement_count).
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# @SIDE_EFFECT: None — pure SQL generation.
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# #region SQLGenerator.generate [C:4] [TYPE Function] [SEMANTICS translate,sql,generate]
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# @BRIEF Generate SQL for a set of rows, detecting dialect from the job configuration.
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# @PRE dialect is a supported database dialect. columns list is non-empty. rows is non-empty.
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# @POST Returns tuple of (sql_string, statement_count).
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# @SIDE_EFFECT None — pure SQL generation.
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@staticmethod
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def generate(
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dialect: str,
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@@ -236,6 +286,7 @@ class SQLGenerator:
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columns=quoted_columns,
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key_columns=quoted_key_columns,
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rows=rows,
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dialect=dialect,
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)
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else:
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sql = generate_insert_sql(
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@@ -243,6 +294,7 @@ class SQLGenerator:
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target_table=table_ref,
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columns=quoted_columns,
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rows=rows,
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dialect=dialect,
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)
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elif dialect in CLICKHOUSE_DIALECTS:
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# ClickHouse: plain INSERT, no ON CONFLICT support
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@@ -251,6 +303,7 @@ class SQLGenerator:
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target_table=table_ref,
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columns=quoted_columns,
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rows=rows,
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dialect=dialect,
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)
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if use_upsert:
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logger.reason("ClickHouse UPSERT not supported; using plain INSERT", {
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@@ -263,6 +316,7 @@ class SQLGenerator:
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target_table=table_ref,
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columns=quoted_columns,
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rows=rows,
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dialect=dialect,
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)
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logger.reflect("SQL generated", {
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@@ -271,12 +325,11 @@ class SQLGenerator:
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"sql_length": len(sql),
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})
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return sql, len(rows)
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# [/DEF:SQLGenerator.generate:Function]
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# #endregion SQLGenerator.generate
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# [DEF:SQLGenerator.generate_batch:Function]
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# @PURPOSE: Generate separate INSERT statements for each row (batch-safe version).
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# @PRE: Same as generate().
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# @POST: Returns list of (sql_string, row_index) tuples.
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# #region SQLGenerator.generate_batch [C:3] [TYPE Function] [SEMANTICS translate,sql,batch]
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# @BRIEF Generate separate INSERT statements for each row chunk (batch-safe version).
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# @RELATION DEPENDS_ON -> [SQLGenerator.generate]
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@staticmethod
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def generate_batch(
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dialect: str,
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@@ -312,8 +365,8 @@ class SQLGenerator:
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statements.append((sql, count))
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return statements
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# [/DEF:SQLGenerator.generate_batch:Function]
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# #endregion SQLGenerator.generate_batch
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# [/DEF:SQLGenerator:Class]
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# [/DEF:SQLGenerator:Module]
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# #endregion SQLGenerator
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# #endregion SQLGenerator
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