Changing tunnel parameter from simple aggregated value to map with two aggregated values gives me XTSE3430: Template rule is not streamable
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RE: Changing tunnel parameter from simple aggregated value to map with two aggregated values gives me XTSE3430: Template rule is not streamable
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Added by Martin Honnen over 5 years ago
I have tried to reduce the problem, the code
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:map="http://www.w3.org/2005/xpath-functions/map" exclude-result-prefixes="#all"
expand-text="yes"
version="3.0">
<xsl:mode on-no-match="shallow-copy" streamable="yes"/>
<xsl:output indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="items">
<xsl:copy>
<xsl:for-each-group select="item!copy-of()" group-by="@id">
<xsl:copy>
<xsl:apply-templates select="@*"/>
<xsl:apply-templates>
<xsl:with-param name="sum" tunnel="yes" select="sum(current-group()/foo)"/>
</xsl:apply-templates>
</xsl:copy>
</xsl:for-each-group>
</xsl:copy>
</xsl:template>
<xsl:template match="item/foo">
<xsl:param name="sum" tunnel="yes"/>
<xsl:copy>{$sum}</xsl:copy>
</xsl:template>
</xsl:stylesheet>
works fine with Saxon 9.8.0.12 EE against the input
<?xml version="1.0" encoding="UTF-8"?>
<root>
<items>
<item id="i1">
<foo>1</foo>
<bar>5</bar>
</item>
<item id="i1">
<foo>1</foo>
<bar>5</bar>
</item>
<item id="i2">
<foo>1</foo>
<bar>5</bar>
</item>
<item id="i2">
<foo>1</foo>
<bar>5</bar>
</item>
</items>
</root>
while the code
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:map="http://www.w3.org/2005/xpath-functions/map" exclude-result-prefixes="#all"
expand-text="yes"
version="3.0">
<xsl:mode on-no-match="shallow-copy" streamable="yes"/>
<xsl:output indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="items">
<xsl:copy>
<xsl:for-each-group select="item!copy-of()" group-by="@id">
<xsl:copy>
<xsl:apply-templates select="@*"/>
<xsl:apply-templates>
<xsl:with-param name="sums" tunnel="yes" select="map { 'foo' : sum(current-group()/foo), 'bar' : sum(current-group()/bar) }"/>
</xsl:apply-templates>
</xsl:copy>
</xsl:for-each-group>
</xsl:copy>
</xsl:template>
<xsl:template match="item/foo">
<xsl:param name="sums" tunnel="yes"/>
<xsl:copy>{$sums?foo}</xsl:copy>
</xsl:template>
<xsl:template match="item/bar">
<xsl:param name="sums" tunnel="yes"/>
<xsl:copy>{$sums?bar}</xsl:copy>
</xsl:template>
</xsl:stylesheet>
gives the error
Error on line 13 of streamed-grouping-pass-map2-1.xsl: XTSE3430: Template rule is not streamable
- There is more than one consuming operand: {item!xsl:copy-of} on line 15, and {xsl:copy} on line 17 Template rule is not streamable
- There is more than one consuming operand: {item!xsl:copy-of} on line 15, and {xsl:copy} on line 17
so this seems the same error but with a reduced test case that only a single xsl:for-each-group select="item!copy-of()".
RE: Changing tunnel parameter from simple aggregated value to map with two aggregated values gives me XTSE3430: Template rule is not streamable
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Added by Michael Kay over 5 years ago
There seems to be a blatant error in the streamability analysis for a map constructor: if all the key-value pairs are grounded and motionless, then it sets the posture and sweep of the map constructor to grounded and consuming.
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