Expression Engine Parsing

[qgib]

Author Name: SF GIS (@digibirdtrek)
Original Redmine Issue: 9666
Affected QGIS version: 2.2.0
Redmine category:expressions

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Update breaks expression engine string builder handling of at least conditional statements. This appears to be a parsing error when saving an expression. Discovered when using a conditional expression in the data defined properties of a style.

Example:

CASE WHEN field1 IS NULL THEN field2 ELSE field1 END

Where field1 and field2 are data fields

Once the string is committed, the space before the ELSE is stripped out, rendering the expression invalid.

CASE WHEN field1 IS NULL THEN field2ELSE field1 END

Attempted to double quote the data fields and use multiple lines in the statement, however the double quotes and line feeds are stripped when the expression is committed ending with the same result.

Once the data defined properties window is closed, the expression is removed entirely and replaced with "(no root)" without the quotes.

[qgib]

Author Name: SF GIS (@digibirdtrek)

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Additional notes. This error impacts existing styles.

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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Fixed in changeset "1d84978f8e037459947027ca10cf44d386e83843".

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• status_id was changed from Open to Closed