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                                    @@ 641-648 (lines=8) @@
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                                    | 638 | 
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                                            $indexes = $this->getIndexes($tableName);  | 
                                
                                                            
                                    | 639 | 
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                                            $columns = array_map('strtolower', $columns); | 
                                
                                                            
                                    | 640 | 
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                                     | 
                                
                                                            
                                    | 641 | 
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                                            foreach ($indexes as $indexName => $index) { | 
                                
                                                            
                                    | 642 | 
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                                                if ($columns == $index['columns']) { | 
                                
                                                            
                                    | 643 | 
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                                                    return new AlterInstructions([sprintf(  | 
                                
                                                            
                                    | 644 | 
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                                                        'DROP INDEX %s',  | 
                                
                                                            
                                    | 645 | 
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                                                        $this->quoteColumnName($indexName)  | 
                                
                                                            
                                    | 646 | 
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                                                    )]);  | 
                                
                                                            
                                    | 647 | 
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                                                }  | 
                                
                                                            
                                    | 648 | 
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                                            }  | 
                                
                                                            
                                    | 649 | 
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                                     | 
                                
                                                            
                                    | 650 | 
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                                            throw new \InvalidArgumentException(sprintf(  | 
                                
                                                            
                                    | 651 | 
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                                                "The specified index on columns '%s' does not exist",  | 
                                
                                                                                
                                 | 
                                
                                    @@ 664-671 (lines=8) @@
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                                    | 661 | 
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                                     | 
                                
                                                            
                                    | 662 | 
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                                            $indexes = $this->getIndexes($tableName);  | 
                                
                                                            
                                    | 663 | 
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                                     | 
                                
                                                            
                                    | 664 | 
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                                            foreach ($indexes as $name => $index) { | 
                                
                                                            
                                    | 665 | 
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                                                if ($name === $indexName) { | 
                                
                                                            
                                    | 666 | 
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                                                    return new AlterInstructions([sprintf(  | 
                                
                                                            
                                    | 667 | 
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                                                        'DROP INDEX %s',  | 
                                
                                                            
                                    | 668 | 
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                                                        $this->quoteColumnName($indexName)  | 
                                
                                                            
                                    | 669 | 
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                                                    )]);  | 
                                
                                                            
                                    | 670 | 
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                                                }  | 
                                
                                                            
                                    | 671 | 
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                                            }  | 
                                
                                                            
                                    | 672 | 
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                                     | 
                                
                                                            
                                    | 673 | 
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                                            throw new \InvalidArgumentException(sprintf(  | 
                                
                                                            
                                    | 674 | 
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                                                "The specified index name '%s' does not exist",  |