Merge pull request #698 from Sequel-Ace/fix-backtickQuotedString-crash

 #fixed SPTableCopy _createTableStatementFor:inDatabase crash

Source/Other/DatabaseActions/SPTableCopy.m

@@ -31,6 +31,7 @@
 #import "SPTableCopy.h"
 
 #import <SPMySQL/SPMySQL.h>
+#import <FirebaseCrashlytics/FirebaseCrashlytics.h>
 
 @interface SPTableCopy ()
 
@@ -142,6 +143,21 @@ - (BOOL)moveTable:(NSString *)tableName from:(NSString *)sourceDatabase to:(NSSt
 
 - (NSString *)_createTableStatementFor:(NSString *)tableName inDatabase:(NSString *)sourceDatabase
 {
+
+    if([tableName respondsToSelector:@selector(backtickQuotedString)] == NO || [sourceDatabase respondsToSelector:@selector(backtickQuotedString)] == NO){
+        NSDictionary *userInfo = @{
+            NSLocalizedDescriptionKey: @"_createTableStatementFor: tableName or sourceDatabase does not respond to selector: backtickQuotedString",
+            @"tableName":tableName.class,
+            @"sourceDatabase":sourceDatabase.class
+        };
+
+        CLS_LOG(@"_createTableStatementFor: tableName or sourceDatabase does not respond to selector: backtickQuotedString");
+        SPLog(@"_createTableStatementFor: tableName or sourceDatabase does not respond to selector: backtickQuotedString");
+        [FIRCrashlytics.crashlytics recordError:[NSError errorWithDomain:@"database" code:9 userInfo:userInfo]];
+
+        return  nil;
+    }
+
 	NSString *showCreateTableStatment = [NSString stringWithFormat:@"SHOW CREATE TABLE %@.%@", [sourceDatabase backtickQuotedString], [tableName backtickQuotedString]];
 
 	SPMySQLResult *result = [connection queryString:showCreateTableStatment];