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Description

This error indicates that the `SELECT` statement within a `CREATE VIEW` definition contains a clause or construct that is not permitted for views by MySQL. MySQL imposes specific restrictions on the complexity and determinism of queries used to define views, leading to this error when those rules are violated.

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Error Message

View's SELECT contains a '%s' clause

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Known Causes

3 known causes

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Disallowed Subquery in FROM Clause

The view's `SELECT` statement includes a subquery in the `FROM` clause, which is often not supported or has specific restrictions in MySQL view definitions.

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Use of Non-Deterministic Functions

The view definition incorporates non-deterministic functions (e.g., `NOW()`, `RAND()`) in the `SELECT` list, which can lead to unpredictable view results.

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Incorrect Aggregate Function Usage

The `SELECT` statement uses aggregate functions (e.g., `COUNT()`, `SUM()`) without a corresponding `GROUP BY` clause, or in a manner that violates view creation rules.

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Solutions

3 solutions available

1. Correct Invalid SELECT Clause Syntax easy

Identify and fix the incorrect clause within the view's SELECT statement.

1

Examine the error message carefully. It will specify the problematic clause (e.g., 'ORDER BY', 'LIMIT', 'PROCEDURE'). These clauses are not permitted directly within a view's SELECT statement.

2

Modify the view definition to remove the invalid clause. For example, if the error is due to an 'ORDER BY' clause, remove it. If you need ordered results, you'll have to apply the ordering when querying the view.

ALTER VIEW your_view_name AS
SELECT column1, column2
FROM your_table
-- Removed ORDER BY and LIMIT clauses here

3

Recreate the view with the corrected SELECT statement.

DROP VIEW IF EXISTS your_view_name;
CREATE VIEW your_view_name AS
SELECT column1, column2
FROM your_table;

2. Wrap Subquery for Ordering or Limiting medium

Encapsulate ordering or limiting logic within a derived table (subquery) to make it valid for a view.

1

Identify if the invalid clause is 'ORDER BY' or 'LIMIT' and if it's essential for the view's logic.

2

Rewrite the view definition to use a subquery (derived table). The inner query will contain the 'ORDER BY' or 'LIMIT' clause, and the outer query will select from this derived table.

CREATE OR REPLACE VIEW your_view_name AS
SELECT column1, column2
FROM (
    SELECT column1, column2
    FROM your_table
    ORDER BY column1 DESC
    LIMIT 10
) AS subquery_alias;

3

Ensure the subquery has a unique alias (e.g., 'subquery_alias').

3. Review and Correct Stored Procedure Calls medium

Ensure stored procedures called within a view are correctly defined and do not violate view constraints.

1

If the error message indicates a stored procedure call (e.g., '%s' is a procedure name), carefully review the stored procedure that the view is attempting to use.

2

Verify that the stored procedure does not contain any clauses that are invalid within a view's SELECT statement (e.g., 'ORDER BY', 'LIMIT', 'PROCEDURE' itself as a direct clause).

3

Modify the stored procedure to adhere to view constraints. Alternatively, consider if the stored procedure's functionality is truly necessary within the view. Sometimes, it might be better to call the stored procedure separately and then use its results in a different way.

Example: If the stored procedure was returning a result set with ORDER BY, remove it from the procedure and apply it when calling the procedure or a view based on its output.

4

Recreate the view after ensuring the stored procedure is compliant or re-architecting the solution.

DROP VIEW IF EXISTS your_view_name;
CREATE VIEW your_view_name AS
SELECT column1, column2
FROM your_table
WHERE some_condition = some_function(); -- If some_function() is a stored procedure call

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Related Errors

5 related errors

MySQL Error 1350: Invalid View SELECT Clause