Added relation and supporting files (#144)

Co-authored-by: nrodriguezmicrofocus <[email protected]>
Co-authored-by: nrodriguezmicrofocus <[email protected]>

dbt/adapters/vertica/__init__.py

@@ -17,6 +17,7 @@
 from dbt.adapters.vertica.connections import verticaCredentials
 from dbt.adapters.vertica.impl import verticaAdapter
 from dbt.adapters.vertica.column import VerticaColumn
+from dbt.adapters.vertica.relation import VerticaRelation
 
 
 from dbt.adapters.base import AdapterPlugin

dbt/adapters/vertica/relation.py

@@ -0,0 +1,56 @@
+from dataclasses import dataclass, field
+from typing import FrozenSet, List, Optional
+
+from dbt.adapters.base.relation import BaseRelation
+from dbt.adapters.contracts.relation import RelationConfig, RelationType
+from dbt.adapters.relation_configs import (
+    RelationConfigChangeAction,
+    RelationResults,
+)
+from dbt_common.exceptions import DbtRuntimeError
+
+from dbt.adapters.vertica.relation_configs.policies import (
+    MAX_CHARACTERS_IN_IDENTIFIER,
+    )
+
+
+@dataclass(frozen=True, eq=False, repr=False)
+class VerticaRelation(BaseRelation):
+    quote_character: str = '"'
+    require_alias: bool = (
+        False  # used to govern whether to add an alias when render_limited is called
+    )
+    renameable_relations: FrozenSet[RelationType] = field(
+        default_factory=lambda: frozenset(
+            {
+                RelationType.View,
+                RelationType.Table,
+            }
+        )
+    )
+    replaceable_relations: FrozenSet[RelationType] = field(
+        default_factory=lambda: frozenset(
+            {
+                RelationType.View,
+                RelationType.Table,
+            }
+        )
+    )
+
+    def __post_init__(self):
+        # Check for length of Postgres table/view names.
+        # Check self.type to exclude test relation identifiers
+        if (
+            self.identifier is not None
+            and self.type is not None
+            and len(self.identifier) > self.relation_max_name_length()
+        ):
+            raise DbtRuntimeError(
+                f"Relation name '{self.identifier}' "
+                f"is longer than {self.relation_max_name_length()} characters"
+            )
+
+    def relation_max_name_length(self):
+        return MAX_CHARACTERS_IN_IDENTIFIER
+
+

dbt/adapters/vertica/relation_configs/__init__.py

@@ -0,0 +1,13 @@
+from dbt.adapters.vertica.relation_configs.policies import (
+    MAX_CHARACTERS_IN_IDENTIFIER,
+    VerticaIncludePolicy,
+    VerticaQuotePolicy,
+    VerticaRelationType,
+)
+
+__all__ = [
+    "MAX_CHARACTERS_IN_IDENTIFIER",
+    "VerticaIncludePolicy",
+    "VerticaQuotePolicy",
+    "VerticaRelationType",
+]

dbt/adapters/vertica/relation_configs/policies.py

@@ -0,0 +1,25 @@
+from dataclasses import dataclass
+
+from dbt.adapters.contracts.relation import Policy
+from dbt_common.dataclass_schema import StrEnum
+
+MAX_CHARACTERS_IN_IDENTIFIER = 127
+
+
+class VerticaRelationType(StrEnum):
+    Table = "table"
+    View = "view"
+    CTE = "cte"
+
+
+class VerticaIncludePolicy(Policy):
+    database: bool = True
+    schema: bool = True
+    identifier: bool = True
+
+
+@dataclass
+class VerticaQuotePolicy(Policy):
+    database: bool = True
+    schema: bool = True
+    identifier: bool = True