Remove an elemento of the map.

1 map.remove

<map.remove name='name'>
    <expr /> ?
    <var /> ?
</map.remove>
Example
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<xsql-script name='map_remove_sample1'>
    <body>
        <map name='a'>
            <item>0<string>ZERO</string></item>
            <item>1<string>ONE</string></item>
            <item>2<string>TWO</string></item>
            <item>3<string>THREE</string></item>
            <item>4<string>FOUR</string></item>
            <item>5<string>FIVE</string></item>
            <item>6<string>SIX</string></item>
            <item>7<string>SEVEN</string></item>
            <item>8<string>EIGHT</string></item>
            <item>9<string>NINE</string></item>
            <item>10<string>TEN</string></item>            
        </map>

        <map.remove name='a'>10</map.remove>
        <println><a/></println>
    </body>
</xsql-script>

The element of the table which has as key the integer 10 is removed:

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<map.remove name='a'>10</map.remove>

The structure of 11 elements become to 10.