Load Type Decider

Single source of truth for Keboola's workspace table load-type decision — which mechanism the server uses to load a Storage table into a workspace:

• COPY — always available fallback.
• CLONE — zero-copy, identical row semantics (Snowflake / BigQuery).
• VIEW — live view over the source table.

The library is intentionally dependency-free of the platform: it never reads features from a database or talks to any backend. The caller resolves project features one level up and passes them in as plain booleans via LoadTypeDeciderFeatures. This keeps the decision logic centralized, pure, and trivially testable.

Installation

composer require keboola/php-load-type-decider

Usage

use Keboola\LoadTypeDecider\LoadTypeDecider;
use Keboola\LoadTypeDecider\LoadTypeDeciderFeatures;

$decision = LoadTypeDecider::decide(
    $tableInfo,      // Storage API table detail
    $workspaceType,  // 'snowflake' | 'bigquery'
    $exportOptions,  // options about to be passed to the workspace load
    new LoadTypeDeciderFeatures(
        bigqueryDefaultImView: false,
        snowflakeReadOnlyStorage: true,
    ),
);

$decision->preferred;  // LoadType the server picks when none is pinned
$decision->possible;   // full set the caller may choose from (always contains COPY)

Call LoadTypeDecider::checkViableLoadMethod() before deciding to reject loads that no method can satisfy (throws Exception\InvalidInputException).

Development

This package is developed inside the keboola/connection monorepo and mirrored read-only to keboola/php-load-type-decider. Open pull requests against the monorepo.

composer install
composer ci      # lint + phpcs + phpstan + tests

License

MIT — see LICENSE.