52 lines
1.8 KiB
Python
52 lines
1.8 KiB
Python
"""Thoth/PostgREST implementation of the DWH port."""
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from tht.config import DatabaseConfig, RestConfig
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from tht.db.introspect import introspect_rest
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from tht.execute import ExecResult, PlanSummary
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from tht.mschema.models import PhysicalSchema
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from tht.ports.dwh import DwhCapabilities, DwhHealth
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from tht.rest.client import RestClient, RestError
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from tht.rest.execute import (
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distinct_values_rest,
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explain_rest,
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run_controlled_rest,
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sample_column_rest,
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)
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class ThothRestDwhAdapter:
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capabilities = DwhCapabilities()
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def __init__(self, database: DatabaseConfig, rest: RestConfig):
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self._database = database
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self._client = RestClient(rest)
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def health(self) -> DwhHealth:
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try:
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result = self._client.ping()
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except RestError as exc:
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return DwhHealth(ok=False, detail=str(exc))
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ok = bool(result.get("db_connected", True))
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return DwhHealth(ok=ok, detail=None if ok else str(result))
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def introspect(self) -> PhysicalSchema:
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return introspect_rest(
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self._client, self._database.database, self._database.db_schema
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)
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def run_query(self, sql: str, *, limit: int | None = None) -> ExecResult:
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return run_controlled_rest(self._client, sql, limit=10 if limit is None else limit)
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def explain(self, sql: str) -> PlanSummary:
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return explain_rest(self._client, sql)
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def sample_column(self, table: str, column: str, *, limit: int) -> list[object]:
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return sample_column_rest(
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self._client, self._database.db_schema, table, column, limit=limit
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)
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def distinct_values(self, table: str, column: str) -> list[object]:
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return distinct_values_rest(
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self._client, self._database.db_schema, table, column
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)
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