fix(sqlite-driver): Fixed table schema parsing: support for escape ch…

…aracters (#289). Thanks to @philippefutureboy!

* fix(SqliteDriver.js): Fixed table schema parsing

#1 .match on line 52 returned null => fixed by removing the EOL character
#2 The describe table returns the name of the field between square brackets => fixed by removing the square brackets

* Added support for all escape symbols ((\[|`|")?)

Fix now supports all escape symbols and absence of escape symbol.
+ Refactored the `tables.map.reduce` to `tables.reduce` instead.

packages/cubejs-sqlite-driver/driver/SqliteDriver.js

@@ -46,14 +46,23 @@ class SqliteDriver extends BaseDriver {
     const tables = await this.query(query);
 
     return {
-      default: {
-        ...(tables.map(
-          table => ({
-            [table.name]: table.sql.match(/\((.*)\)/)[1].split(',')
-              .map(nameAndType => nameAndType.trim().split(' ')).map(([name, type]) => ({ name, type }))
-          })
-        )).reduce((a, b) => ({ ...a, ...b }), {})
-      }
+      default: tables.reduce((acc, table) => ({
+          ...acc,
+          [table.name]: table.sql
+              // remove EOL for next .match to read full string
+              .replace(/\n/g, '')
+              // extract fields
+              .match(/\((.*)\)/)[1]
+              // split fields
+              .split(',')
+              .map((nameAndType) => {
+                  const match = nameAndType
+                    .trim()
+                    // obtain "([|`|")?name(]|`|")? type"
+                    .match(/(\[|`|")?([^\[\]"`]+)(\]|`|")?\s+(\w+)/)
+                  return { name: match[2], type: match[4] };
+              })
+        }), {}),
     };
   }
 }