import Foundation
let pattern = #"CREATE( (LOCAL )?(?P<temporal>TEMPORARY|TEMP))? TABLE( IF NOT EXISTS)? (?P<schema_name>[{ }\w_]+).(?P<table_name>[{ }\w_]+) ?\((?P<columns>([\w _](\(\d+\))?,?)+)\)( DISTSTYLE (?P<dist_style>(EVEN|KEY|ALL)))?( DISTKEY \((?P<dist_key>[\w_]+)\))?( (?P<sort_key_type>(COMPOUND|INTERLEAVED) )?SORTKEY \((?P<sort_keys>([\w _,]+))\))?"#
let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .caseInsensitive])
let testString = #"""
-- TEST 2 WITH COLUMNS
CREATE( (LOCAL )?(?P<temporal>TEMPORARY|TEMP))? TABLE( IF NOT EXISTS)? (?P<schema_name>[{ }\w_]+).(?P<table_name>[{ }\w_]+) \( (?P<columns>([\w _](\(\d+\))?,?)+) \)
-- COLUMNS
\( ([\w _](\(\d+\))?,?)+ \)
-- COLUMNA
(?P<column>([\w _](\(\d+\))?)+)
-- TABLE ATTRIBUTE
(DISTSTYLE (?P<dist_style>(EVEN|KEY|ALL)))|(DISTKEY\((?P<dist_key>[\w_]+)\))|((?P<sort_key_type>(COMPOUND|INTERLEAVED) )?SORTKEY \((?P<sort_keys>([\w _,]+))\))
CREATE TABLE {{schema}}.ad_params (er_id_site INTEGER ENCODE DELTA, er_id_ad VARCHAR(256) ENCODE LZO, ad_param_key VARCHAR(256), ad_param_value VARCHAR(256), id_ad_param_value VARCHAR(256), dt_audit_insert TIMESTAMP WITHOUT TIME ZONE ENCODE LZO, dt_audit_update TIMESTAMP WITHOUT TIME ZONE ENCODE LZO, dt_audit_analysis TIMESTAMP WITHOUT TIME ZONE ENCODE LZO) DISTKEY (er_id_ad) INTERLEAVED SORTKEY (er_id_site, er_id_ad, ad_param_key, id_ad_param_value)
DROP TABLE IF EXISTS {{ dm_site_schema }}.ad_cohort;
---------------------------------------
CREATE TABLE {{staging_site_schema}}.ads (ad_id INTEGER NOT NULL ENCODE DELTA32k, list_id VARCHAR(32) ENCODE LZO, list_time VARCHAR(32) ENCODE LZO, status VARCHAR(32), name VARCHAR(128), region INTEGER, category INTEGER, user_id INTEGER, phone_hidden BOOL, no_salesmen BOOL, company_ad BOOL, subject VARCHAR(256) ENCODE LZO, body VARCHAR(65535) ENCODE LZO, price VARCHAR(16) ENCODE LZO, orig_list_time VARCHAR(32) ENCODE LZO, old_price VARCHAR(16) ENCODE LZO, modified_at VARCHAR(32) ENCODE LZO, lang VARCHAR(32), type VARCHAR(32), account_id INTEGER) DISTKEY(ad_id)
---------------------------------------
DROP TABLE IF EXISTS {{staging_site_schema}}.state_params
---------------------------------------
CREATE TABLE {{staging_site_schema}}.state_params (ad_id INTEGER encode raw, action_id INTEGER encode raw, state_id INT4 encode raw, name VARCHAR(20) encode raw, value VARCHAR(65535) encode raw) DISTKEY(ad_id)
---------------------------------------
DROP TABLE IF EXISTS {{staging_site_schema}}.users
---------------------------------------
CREATE TABLE {{staging_site_schema}}.users (user_id INTEGER ENCODE DELTA, uid INTEGER ENCODE DELTA, email VARCHAR(124) ENCODE LZO, account INTEGER ENCODE LZO, paid_total INTEGER ENCODE LZO) DISTKEY(user_id)
---------------------------------------
---------------------------------------
CREATE TABLE {{ staging_site_schema }}.ad_params ( ad_id INTEGER NOT NULL ENCODE DELTA32k, name VARCHAR(32), value VARCHAR(1024)) DISTKEY(ad_id)
CREATE TABLE {{ staging_site_schema }}.ad_params ( ad_id INTEGER NOT NULL ENCODE DELTA32k, name VARCHAR(32), value VARCHAR(1024))
CREATE TABLE {{ staging_site_schema }}.ad_params ( ad_id INTEGER NOT NULL ENCODE DELTA32k, name VARCHAR(32), value VARCHAR(1024)) DISTSTYLE ALL INTERLEAVED SORTKEY (dt_creation, dt_posting, er_id_region, er_id_site_location);
CREATE [ [LOCAL ] { TEMPORARY | TEMP } ] TABLE
[ IF NOT EXISTS ] table_name
( { column_name data_type [column_attributes] [ column_constraints ]
| table_constraints
| LIKE parent_table [ { INCLUDING | EXCLUDING } DEFAULTS ] }
[, ... ] )
[ BACKUP { YES | NO } ]
[table_attribute]
and table_attributes are:
[ DISTSTYLE { EVEN | KEY | ALL } ]
[ DISTKEY ( column_name ) ]
[ [COMPOUND | INTERLEAVED ] SORTKEY ( column_name [, ...] ) ]
"""#
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