rquery (version 1.4.6)

tokenize_for_SQL: Cross-parse from an R parse tree into SQL.

Description

Cross-parse from an R parse tree into SQL.

Usage

tokenize_for_SQL(lexpr, colnames, env = parent.frame())

Arguments

lexpr

item from substitute

colnames

column names of table

env

environment to look for values

Value

sql info: list(presentation, parsed_toks(list of tokens), sql_text, symbols_used, symbols_produced, free_symbols)

Examples

# NOT RUN {
tokenize_for_SQL(substitute(1 + 2), colnames= NULL)
tokenize_for_SQL(substitute(a := 3), colnames= NULL)
tokenize_for_SQL(substitute(a %:=% ( 3 + 4 )), colnames= NULL)
tokenize_for_SQL(substitute(a %:=% rank(3, 4)), colnames= NULL)

# }

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