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adds print message for mutate removing groupBy until rectified. adds …
…mutate across support, improves rounding
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| function expr_to_sql_lite(expr, sq; from_summarize::Bool) | ||
| expr = parse_char_matching(expr) | ||
| expr = exc_capture_bug(expr, names_to_modify) | ||
|
|
||
| MacroTools.postwalk(expr) do x | ||
|
|
||
| # Handle basic arithmetic and functions | ||
| if @capture(x, a_ + b_) | ||
| return :($a + $b) | ||
| elseif @capture(x, a_ - b_) | ||
| return :($a - $b) | ||
| elseif @capture(x, a_ * b_) | ||
| return :($a * $b) | ||
| elseif @capture(x, a_ / b_) | ||
| return :($a / $b) | ||
| elseif @capture(x, a_ ^ b_) | ||
| return :(POWER($a, $b)) | ||
| elseif @capture(x, round(a_)) | ||
| return :(ROUND($a)) | ||
| elseif @capture(x, round(a_, b_)) | ||
| return :(ROUND($a, $b)) | ||
| elseif @capture(x, mean(a_)) | ||
| if from_summarize | ||
| return :(AVG($a)) | ||
| else | ||
| window_clause = construct_window_clause(sq) | ||
| return "AVG($(string(a))) $(window_clause)" | ||
| end | ||
| elseif @capture(x, minimum(a_)) | ||
| if from_summarize | ||
| return :(MIN($a)) | ||
| else | ||
| window_clause = construct_window_clause(sq) | ||
| return "MIN($(string(a))) $(window_clause)" | ||
| end | ||
| elseif @capture(x, maximum(a_)) | ||
| if from_summarize | ||
| return :(MAX($a)) | ||
| else | ||
| window_clause = construct_window_clause(sq) | ||
| return "MAX($(string(a))) $(window_clause)" | ||
| end | ||
| elseif @capture(x, sum(a_)) | ||
| if from_summarize | ||
| return :(SUM($a)) | ||
| else | ||
| window_clause = construct_window_clause(sq) | ||
| return "SUM($(string(a))) $(window_clause)" | ||
| end | ||
| elseif @capture(x, cumsum(a_)) | ||
| if from_summarize | ||
| error("cumsum is only available through a windowed @mutate") | ||
| else | ||
| # sq.windowFrame = "ROWS UNBOUNDED PRECEDING " | ||
| window_clause = construct_window_clause(sq, from_cumsum = true) | ||
| return "SUM($(string(a))) $(window_clause)" | ||
| end | ||
| # exc_capture_bug used above to allow proper _ function name capturing | ||
| elseif @capture(x, replacemissing(column_, replacement_value_)) | ||
| return :(COALESCE($column, $replacement_value)) | ||
| elseif @capture(x, missingif(column_, value_to_replace_)) | ||
| return :(NULLIF($column, $value_to_replace)) | ||
| elseif @capture(x, ismissing(a_)) | ||
| return "($(string(a)) IS NULL)" | ||
| elseif isa(x, Expr) && x.head == :call | ||
| if x.args[1] == :if_else && length(x.args) == 4 | ||
| return parse_if_else(x) | ||
| elseif x.args[1] == :as_float && length(x.args) == 2 | ||
| column = x.args[2] | ||
| # Return the SQL CAST statement directly as a string | ||
| return "CAST(" * string(column) * " AS DOUBLE)" | ||
| elseif x.args[1] == :as_integer && length(x.args) == 2 | ||
| column = x.args[2] | ||
| return "CAST(" * string(column) * " AS INT)" | ||
| elseif x.args[1] == :as_string && length(x.args) == 2 | ||
| column = x.args[2] | ||
| return "CAST(" * string(column) * " AS STRING)" | ||
| elseif x.args[1] == :case_when | ||
| return parse_case_when(x) | ||
| elseif isa(x, Expr) && x.head == :call && x.args[1] == :! && length(x.args) == 2 | ||
| inner_expr = expr_to_sql_lite(x.args[2], sq) # Recursively transform the inner expression | ||
| return string("NOT (", inner_expr, ")") | ||
| elseif x.args[1] == :str_detect && length(x.args) == 3 | ||
| column, pattern = x.args[2], x.args[3] | ||
| return string(column, " LIKE \'%", pattern, "%'") | ||
| elseif isa(x, Expr) && x.head == :call && x.args[1] == :n && length(x.args) == 1 | ||
| return "COUNT(*)" | ||
| end | ||
| end | ||
| return x | ||
| end | ||
| end |