# Namespace Npgsql.EntityFrameworkCore.PostgreSQL.Query.Internal

### Classes

NpgsqlCompiledQueryCacheKeyGenerator

  This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.

NpgsqlDeleteConvertingExpressionVisitor

  Converts the relational DeleteExpression into a PG-specific PgDeleteExpression, which precisely models a DELETE statement in PostgreSQL. This is done to handle the PG-specific USING syntax for table joining.

NpgsqlEvaluatableExpressionFilter

  This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.

NpgsqlParameterBasedSqlProcessor

  This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.

NpgsqlParameterBasedSqlProcessorFactory

  This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.

NpgsqlQueryCompilationContext

  This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.

NpgsqlQueryCompilationContextFactory

  This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.

NpgsqlQuerySqlGenerator

  The default query SQL generator for Npgsql.

NpgsqlQuerySqlGeneratorFactory

  The default factory for Npgsql-specific query SQL generators.

NpgsqlQueryTranslationPostprocessor

  This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.

NpgsqlQueryTranslationPostprocessorFactory

  This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.

NpgsqlQueryableMethodTranslatingExpressionVisitor

  This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.

NpgsqlQueryableMethodTranslatingExpressionVisitorFactory

  This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.

NpgsqlSetOperationTypingInjector

  A visitor that injects explicit typing on null projections in set operations, to ensure PostgreSQL gets the typing right.

NpgsqlSqlNullabilityProcessor

  A class that processes a SQL tree based on nullability of nodes to apply null semantics in use and optimize it based on parameter values.

  This type is typically used by database providers (and other extensions). It is generally not used in application code.

NpgsqlSqlTranslatingExpressionVisitor

  This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.

NpgsqlSqlTranslatingExpressionVisitorFactory

  This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.

NpgsqlSqlTreePruner

  This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.

NpgsqlTypeMappingPostprocessor

  This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.

NpgsqlUnnestPostprocessor

  Locates instances of PgUnnestExpression in the tree and prunes the WITH ORDINALITY clause from them if the ordinality column isn't referenced anywhere.

### Enums

NpgsqlSqlTranslatingExpressionVisitor.StartsEndsWithContains

  This is an internal API that supports the Entity Framework Core infrastructure and not subject to the same compatibility standards as public APIs. It may be changed or removed without notice in any release. You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release.