RelationalQueryableMethodTranslatingExpressionVisitor.IsValidSelectExpressionForExecuteUpdate Method
Definition
Important
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Overloads
| IsValidSelectExpressionForExecuteUpdate(SelectExpression, EntityShaperExpression, TableExpression) |
Validates if the current select expression can be used for execute update operation or it requires to be joined as a subquery. |
| IsValidSelectExpressionForExecuteUpdate(SelectExpression, TableExpressionBase, TableExpression) |
Validates if the current select expression can be used for execute update operation or it requires to be joined as a subquery. |
IsValidSelectExpressionForExecuteUpdate(SelectExpression, EntityShaperExpression, TableExpression)
Validates if the current select expression can be used for execute update operation or it requires to be joined as a subquery.
protected virtual bool IsValidSelectExpressionForExecuteUpdate (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression selectExpression, Microsoft.EntityFrameworkCore.Query.EntityShaperExpression entityShaperExpression, out Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpression? tableExpression);abstract member IsValidSelectExpressionForExecuteUpdate : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression * Microsoft.EntityFrameworkCore.Query.EntityShaperExpression * TableExpression -> bool
override this.IsValidSelectExpressionForExecuteUpdate : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression * Microsoft.EntityFrameworkCore.Query.EntityShaperExpression * TableExpression -> boolProtected Overridable Function IsValidSelectExpressionForExecuteUpdate (selectExpression As SelectExpression, entityShaperExpression As EntityShaperExpression, ByRef tableExpression As TableExpression) As BooleanParameters
- selectExpression
- SelectExpression
The select expression to validate.
- entityShaperExpression
- EntityShaperExpression
The entity shaper expression on which the update operation is being applied.
- tableExpression
- TableExpression
The table expression from which rows are being deleted.
Returns
Returns true if the current select expression can be used for update as-is, false otherwise.
Remarks
By default, only muli-table select expressions are supported, and optionally with a predicate.
Providers can override this to allow more select expression features to be supported without pushing down into a subquery. When doing this, VisitUpdate must also be overridden in the provider's QuerySqlGenerator to add SQL generation support for the feature.
Applies to
IsValidSelectExpressionForExecuteUpdate(SelectExpression, TableExpressionBase, TableExpression)
Validates if the current select expression can be used for execute update operation or it requires to be joined as a subquery.
protected virtual bool IsValidSelectExpressionForExecuteUpdate (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression selectExpression, Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase targetTable, out Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpression? tableExpression);abstract member IsValidSelectExpressionForExecuteUpdate : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression * Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase * TableExpression -> bool
override this.IsValidSelectExpressionForExecuteUpdate : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression * Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase * TableExpression -> boolProtected Overridable Function IsValidSelectExpressionForExecuteUpdate (selectExpression As SelectExpression, targetTable As TableExpressionBase, ByRef tableExpression As TableExpression) As BooleanParameters
- selectExpression
- SelectExpression
The select expression to validate.
- targetTable
- TableExpressionBase
The target table containing the rows to be updated.
- tableExpression
- TableExpression
The table expression corresponding to the provided targetTable, containing the rows to be updated.
Returns
Returns true if the current select expression can be used for update as-is, false otherwise.
Remarks
By default, only multi-table select expressions are supported, and optionally with a predicate.
Providers can override this to allow more select expression features to be supported without pushing down into a subquery. When doing this, VisitUpdate must also be overridden in the provider's QuerySqlGenerator to add SQL generation support for the feature.
