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

In WinVector/rquery: Relational Query Generator for Data Manipulation at Scale

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

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)

WinVector/rquery documentation built on Aug. 24, 2023, 11:12 a.m.