import Foundation
let pattern = #"(?<=where)(.*?)((ORDER BY|GROUP BY|HAVING|LIMIT|OFFSET|$).*)"#
let regex = try! NSRegularExpression(pattern: pattern, options: [.caseInsensitive, .dotMatchesLineSeparators])
let testString = #"""
select "DIM_1"."col1",
"DIM_2"."col2" ,
"DIM_3"."col3" ,
"DIM_4"."col4" ,
"FAT_1"."col5"
from "FAT_1",
"DIM_1",
"DIM_2",
"DIM_3",
"DIM_4"
where "DIM_1"."col1" IS NOT NULL
AND "DIM_2"."col2" LIKE ('SUCCESS')
AND "DIM_3"."col3" BETWEEN 20161213 AND 20161222
AND "DIM_4"."col4" > 0
GROUP BY DIM_1.col1
"""#
let stringRange = NSRange(location: 0, length: testString.utf16.count)
let matches = regex.matches(in: testString, range: stringRange)
var result: [[String]] = []
for match in matches {
var groups: [String] = []
for rangeIndex in 1 ..< match.numberOfRanges {
let nsRange = match.range(at: rangeIndex)
guard !NSEqualRanges(nsRange, NSMakeRange(NSNotFound, 0)) else { continue }
let string = (testString as NSString).substring(with: nsRange)
groups.append(string)
}
if !groups.isEmpty {
result.append(groups)
}
}
print(result)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression