TODO
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set xxx - without value to reset to default value
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escape " in save csv
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is null | is not null
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coalesce, date functions now, add_date; string functions rtrim, ltrim, rpad, lpad; math function round
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add pipe | concatenation
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add support for 1_000_000 numbers
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expand_asterix_char should support multiple and everywhere *
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support for uniqueue indexes (primary key)
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support for btree indexes
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support for joining
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use string_to_double and string_to_long (from Table) everywhere
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add const wherever should be
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use static methods where posible
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use references where pointer cannot be nullptr