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- <?php
-
- namespace Tqdev\PhpCrudApi\Database;
-
- use Tqdev\PhpCrudApi\Database\LazyPdo;
-
- class GenericReflection
- {
- private $pdo;
- private $driver;
- private $database;
- private $typeConverter;
-
- public function __construct(LazyPdo $pdo, string $driver, string $database)
- {
- $this->pdo = $pdo;
- $this->driver = $driver;
- $this->database = $database;
- $this->typeConverter = new TypeConverter($driver);
- }
-
- public function getIgnoredTables(): array
- {
- switch ($this->driver) {
- case 'mysql':return [];
- case 'pgsql':return ['spatial_ref_sys', 'raster_columns', 'raster_overviews', 'geography_columns', 'geometry_columns'];
- case 'sqlsrv':return [];
- }
- }
-
- private function getTablesSQL(): string
- {
- switch ($this->driver) {
- case 'mysql':return 'SELECT "TABLE_NAME", "TABLE_TYPE" FROM "INFORMATION_SCHEMA"."TABLES" WHERE "TABLE_TYPE" IN (\'BASE TABLE\' , \'VIEW\') AND "TABLE_SCHEMA" = ? ORDER BY BINARY "TABLE_NAME"';
- case 'pgsql':return 'SELECT c.relname as "TABLE_NAME", c.relkind as "TABLE_TYPE" FROM pg_catalog.pg_class c LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace WHERE c.relkind IN (\'r\', \'v\') AND n.nspname <> \'pg_catalog\' AND n.nspname <> \'information_schema\' AND n.nspname !~ \'^pg_toast\' AND pg_catalog.pg_table_is_visible(c.oid) AND \'\' <> ? ORDER BY "TABLE_NAME";';
- case 'sqlsrv':return 'SELECT o.name as "TABLE_NAME", o.xtype as "TABLE_TYPE" FROM sysobjects o WHERE o.xtype IN (\'U\', \'V\') ORDER BY "TABLE_NAME"';
- }
- }
-
- private function getTableColumnsSQL(): string
- {
- switch ($this->driver) {
- case 'mysql':return 'SELECT "COLUMN_NAME", "IS_NULLABLE", "DATA_TYPE", "CHARACTER_MAXIMUM_LENGTH", "NUMERIC_PRECISION", "NUMERIC_SCALE" FROM "INFORMATION_SCHEMA"."COLUMNS" WHERE "TABLE_NAME" = ? AND "TABLE_SCHEMA" = ?';
- case 'pgsql':return 'SELECT a.attname AS "COLUMN_NAME", case when a.attnotnull then \'NO\' else \'YES\' end as "IS_NULLABLE", pg_catalog.format_type(a.atttypid, -1) as "DATA_TYPE", case when a.atttypmod < 0 then NULL else a.atttypmod-4 end as "CHARACTER_MAXIMUM_LENGTH", case when a.atttypid != 1700 then NULL else ((a.atttypmod - 4) >> 16) & 65535 end as "NUMERIC_PRECISION", case when a.atttypid != 1700 then NULL else (a.atttypmod - 4) & 65535 end as "NUMERIC_SCALE" FROM pg_attribute a JOIN pg_class pgc ON pgc.oid = a.attrelid WHERE pgc.relname = ? AND \'\' <> ? AND a.attnum > 0 AND NOT a.attisdropped;';
- case 'sqlsrv':return 'SELECT c.name AS "COLUMN_NAME", c.is_nullable AS "IS_NULLABLE", t.Name AS "DATA_TYPE", (c.max_length/2) AS "CHARACTER_MAXIMUM_LENGTH", c.precision AS "NUMERIC_PRECISION", c.scale AS "NUMERIC_SCALE" FROM sys.columns c INNER JOIN sys.types t ON c.user_type_id = t.user_type_id WHERE c.object_id = OBJECT_ID(?) AND \'\' <> ?';
- }
- }
-
- private function getTablePrimaryKeysSQL(): string
- {
- switch ($this->driver) {
- case 'mysql':return 'SELECT "COLUMN_NAME" FROM "INFORMATION_SCHEMA"."KEY_COLUMN_USAGE" WHERE "CONSTRAINT_NAME" = \'PRIMARY\' AND "TABLE_NAME" = ? AND "TABLE_SCHEMA" = ?';
- case 'pgsql':return 'SELECT a.attname AS "COLUMN_NAME" FROM pg_attribute a JOIN pg_constraint c ON (c.conrelid, c.conkey[1]) = (a.attrelid, a.attnum) JOIN pg_class pgc ON pgc.oid = a.attrelid WHERE pgc.relname = ? AND \'\' <> ? AND c.contype = \'p\'';
- case 'sqlsrv':return 'SELECT c.NAME as "COLUMN_NAME" FROM sys.key_constraints kc inner join sys.objects t on t.object_id = kc.parent_object_id INNER JOIN sys.index_columns ic ON kc.parent_object_id = ic.object_id and kc.unique_index_id = ic.index_id INNER JOIN sys.columns c ON ic.object_id = c.object_id AND ic.column_id = c.column_id WHERE kc.type = \'PK\' and t.object_id = OBJECT_ID(?) and \'\' <> ?';
- }
- }
-
- private function getTableForeignKeysSQL(): string
- {
- switch ($this->driver) {
- case 'mysql':return 'SELECT "COLUMN_NAME", "REFERENCED_TABLE_NAME" FROM "INFORMATION_SCHEMA"."KEY_COLUMN_USAGE" WHERE "REFERENCED_TABLE_NAME" IS NOT NULL AND "TABLE_NAME" = ? AND "TABLE_SCHEMA" = ?';
- case 'pgsql':return 'SELECT a.attname AS "COLUMN_NAME", c.confrelid::regclass::text AS "REFERENCED_TABLE_NAME" FROM pg_attribute a JOIN pg_constraint c ON (c.conrelid, c.conkey[1]) = (a.attrelid, a.attnum) JOIN pg_class pgc ON pgc.oid = a.attrelid WHERE pgc.relname = ? AND \'\' <> ? AND c.contype = \'f\'';
- case 'sqlsrv':return 'SELECT COL_NAME(fc.parent_object_id, fc.parent_column_id) AS "COLUMN_NAME", OBJECT_NAME (f.referenced_object_id) AS "REFERENCED_TABLE_NAME" FROM sys.foreign_keys AS f INNER JOIN sys.foreign_key_columns AS fc ON f.OBJECT_ID = fc.constraint_object_id WHERE f.parent_object_id = OBJECT_ID(?) and \'\' <> ?';
- }
- }
-
- public function getDatabaseName(): string
- {
- return $this->database;
- }
-
- public function getTables(): array
- {
- $sql = $this->getTablesSQL();
- $results = $this->query($sql, [$this->database]);
- foreach ($results as &$result) {
- switch ($this->driver) {
- case 'mysql':
- $map = ['BASE TABLE' => 'table', 'VIEW' => 'view'];
- $result['TABLE_TYPE'] = $map[$result['TABLE_TYPE']];
- break;
- case 'pgsql':
- $map = ['r' => 'table', 'v' => 'view'];
- $result['TABLE_TYPE'] = $map[$result['TABLE_TYPE']];
- break;
- case 'sqlsrv':
- $map = ['U' => 'table', 'V' => 'view'];
- $result['TABLE_TYPE'] = $map[trim($result['TABLE_TYPE'])];
- break;
- }
- }
- return $results;
- }
-
- public function getTableColumns(string $tableName, string $type): array
- {
- $sql = $this->getTableColumnsSQL();
- $results = $this->query($sql, [$tableName, $this->database]);
- if ($type == 'view') {
- foreach ($results as &$result) {
- $result['IS_NULLABLE'] = false;
- }
- }
- return $results;
- }
-
- public function getTablePrimaryKeys(string $tableName): array
- {
- $sql = $this->getTablePrimaryKeysSQL();
- $results = $this->query($sql, [$tableName, $this->database]);
- $primaryKeys = [];
- foreach ($results as $result) {
- $primaryKeys[] = $result['COLUMN_NAME'];
- }
- return $primaryKeys;
- }
-
- public function getTableForeignKeys(string $tableName): array
- {
- $sql = $this->getTableForeignKeysSQL();
- $results = $this->query($sql, [$tableName, $this->database]);
- $foreignKeys = [];
- foreach ($results as $result) {
- $foreignKeys[$result['COLUMN_NAME']] = $result['REFERENCED_TABLE_NAME'];
- }
- return $foreignKeys;
- }
-
- public function toJdbcType(string $type, int $size): string
- {
- return $this->typeConverter->toJdbc($type, $size);
- }
-
- private function query(string $sql, array $parameters): array
- {
- $stmt = $this->pdo->prepare($sql);
- //echo "- $sql -- " . json_encode($parameters, JSON_UNESCAPED_UNICODE) . "\n";
- $stmt->execute($parameters);
- return $stmt->fetchAll();
- }
- }
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