Rasql - cannot use DEM as collection alias

[Bang Pham Huu]

This will cause problem when one uses DEM or dem as collection iterator.

rasql -q 'select encode(DEM, "png") from test_mr as DEM' --out string
 error 300: Parsing error 300 in line 1, column 18: Unexpected name ,.

[Vlad Merticariu]

DEM is a function name (just like PNG(…)).

DEM LRPAR generalExp COMMA StringLit RRPAR

{

$$ = new QtConversion( $3, QtConversion::QT_TODEM, $5.value );
$$→setParseInfo( *($1.info) );
parseQueryTree→removeDynamicObject( $3 );
parseQueryTree→addDynamicObject( $$ );
FREESTACK($1)
FREESTACK($2)
FREESTACK($4)
FREESTACK($6)

}

[Peter Baumann]

…where do I find this information as a user? Do we have a list of all reserved words anywhere?

Also, the error message is inadequate: "unexpected name ,". Ideally, a user would see aka "Error: Rserved word forbidden in this position."

[Vlad Merticariu]

The list of reserved tokens is in qlparser/lex.ll. We could add to the docs in an appendix similar to ​https://doc.rasdaman.org/04_ql-guide.html#appendix-a-rasql-grammar

[Peter Baumann]

yes, could be generated automatically for rasql. But still needs transfer to WCPS, likely human effort saying "in addition to WCPS keywords, the following are reserved".

[Vlad Merticariu]

WCPS comes with its own list of tokens, IMO that would fit better under ​https://doc.rasdaman.org/05_geo-services-guide.html#wcps, wdyt?

[apercov]

Closing this ticket. Documentation ticket #2303 opened instead