@@ -637,6 +637,8 @@ discard block  | 
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| 637 | 637 | |
| 638 | 638 | /**  | 
                                                        
| 639 | 639 | * @inheritDoc  | 
                                                        
| 640 | + * @param string $tableName  | 
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| 641 | + * @param string|null $columnName  | 
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| 640 | 642 | */  | 
                                                        
| 641 | 643 | protected function getDropDefaultConstraint($tableName, $columnName)  | 
                                                        
| 642 | 644 |      { | 
                                                        
@@ -649,6 +651,9 @@ discard block  | 
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| 649 | 651 | return $this->getDropForeignKeyInstructions($tableName, $defaultConstraint);  | 
                                                        
| 650 | 652 | }  | 
                                                        
| 651 | 653 | |
| 654 | + /**  | 
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| 655 | + * @return string  | 
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| 656 | + */  | 
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| 652 | 657 | protected function getDefaultConstraint($tableName, $columnName)  | 
                                                        
| 653 | 658 |      { | 
                                                        
| 654 | 659 | $sql = "SELECT  |