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<?php |
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namespace Staudenmeir\LaravelAdjacencyList\Query\Grammars; |
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use HarryGulliford\Firebird\Query\Grammars\FirebirdGrammar as Base; |
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use Illuminate\Database\Query\Builder; |
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class FirebirdGrammar extends Base implements ExpressionGrammar |
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{ |
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use OrdersByPath; |
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public function compileInitialPath($column, $alias) |
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{ |
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return 'cast(' . $this->wrap($column) . ' as varchar(8191)) as ' . $this->wrap($alias); |
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} |
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public function compileRecursivePath($column, $alias, bool $reverse = false) |
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{ |
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$wrappedColumn = $this->wrap($column); |
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$wrappedAlias = $this->wrap($alias); |
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$placeholder = 'cast(? as varchar(8191))'; |
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return $reverse ? "($wrappedColumn || $placeholder || $wrappedAlias)" : "($wrappedAlias || $placeholder || $wrappedColumn)"; |
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} |
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public function getRecursivePathBindings($separator) |
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{ |
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return [$separator]; |
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} |
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public function selectPathList(Builder $query, $expression, $column, $pathSeparator, $listSeparator) |
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{ |
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return $query->selectRaw( |
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'list(' . $this->wrap($column) . ", '$listSeparator')" |
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)->from($expression); |
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} |
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public function compilePivotColumnNullValue(string $type, int $precision, int $scale): string |
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{ |
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return 'null'; |
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} |
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public function compileCycleDetection(string $localKey, string $path): string |
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{ |
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$localKey = $this->wrap($localKey); |
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$path = $this->wrap($path); |
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return "position($localKey || ?, $path) > 0 or position(? || $localKey || ?, $path) > 0"; |
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} |
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public function getCycleDetectionBindings(string $pathSeparator): array |
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{ |
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return [$pathSeparator, $pathSeparator, $pathSeparator]; |
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} |
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public function compileCycleDetectionInitialSelect(string $column): string |
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{ |
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return 'false as ' . $this->wrap($column); |
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} |
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public function compileCycleDetectionRecursiveSelect(string $sql, string $column): string |
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{ |
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return $sql; |
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} |
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public function compileCycleDetectionStopConstraint(string $column): string |
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{ |
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return 'not ' . $this->wrap($column); |
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} |
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public function supportsUnionInRecursiveExpression(): bool |
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{ |
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return false; |
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} |
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} |
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staudenmeir /
laravel-adjacency-list
