Database Error Messages

It is a static error if an updating expression is used in any position other than one of the following:

1. The topmost expression in the body of a query.
2. The modify clause of a transform expression.
3. The return clause of a FLWOR expression.
4. The return clauses of a typeswitch expression in which every return clause contains an updating expression, an empty expression ( ), or a call to the fn:error function.
5. The then and else clauses of a conditional statement in which both the then and else clauses contain either an updating expression, an empty expression ( ), or a call to the fn:error function.
6. An operand of a comma expression in which each operand is either an updating expression, an empty expression ( ), or a call to the fn:error function.
7. The content of a parenthesized expression.
8. The body of a function declaration in which the keyword updating is specified.

It is a static error if an updating expression is used in any position other than one of the following:

1. The topmost expression in the body of a query.
2. The modify clause of a transform expression.
3. The return clause of a FLWOR expression.
4. The return clauses of a typeswitch expression in which every return clause contains an updating expression, an empty expression ( ), or a call to the fn:error function.
5. The then and else clauses of a conditional statement in which both the then and else clauses contain either an updating expression, an empty expression ( ), or a call to the fn:error function.
6. An operand of a comma expression in which each operand is either an updating expression, an empty expression ( ), or a call to the fn:error function.
7. The content of a parenthesized expression.
8. The body of a function declaration in which the keyword updating is specified.

It is a static error if an updating expression is used in any position other than one of the following:

1. The topmost expression in the body of a query.
2. The modify clause of a transform expression.
3. The return clause of a FLWOR expression.
4. The return clauses of a typeswitch expression in which every return clause contains an updating expression, an empty expression ( ), or a call to the fn:error function.
5. The then and else clauses of a conditional statement in which both the then and else clauses contain either an updating expression, an empty expression ( ), or a call to the fn:error function.
6. An operand of a comma expression in which each operand is either an updating expression, an empty expression ( ), or a call to the fn:error function.
7. The content of a parenthesized expression.
8. The body of a function declaration in which the keyword updating is specified.