Add handling of command SHOW FULL COLUMNS FOR {table_name}

Andrew Svirin · Andrew Svirin · commit 354470829255 · 2021-10-05T16:28:07.000+03:00
Handling multiple databases for create queries, then sql is CREATE TABLE `database`.`table` and in same script is `information_schema`.`table`
Fixing PDO::getAttribute() missing method
Handling Multiple insert sql.
diff --git a/src/FakePdoStatementTrait.php b/src/FakePdoStatementTrait.php
@@ -137,19 +137,41 @@ public function universalExecute(?array $params = null)
             $create_queries = (new Parser\CreateTableParser())->parse($sql);
 
             foreach ($create_queries as $create_query) {
+                if (strpos($create_query->name, '.')) {
+                    list($databaseName, $tableName) = explode('.', $create_query->name, 2);
+                } else {
+                    $databaseName = $this->conn->getDatabaseName();
+                    $tableName = $create_query->name;
+                }
                 $this->conn->getServer()->addTableDefinition(
-                    $this->conn->getDatabaseName(),
-                    $create_query->name,
+                    $databaseName,
+                    $tableName,
                     Processor\CreateProcessor::makeTableDefinition(
                         $create_query,
-                        $this->conn->getDatabaseName()
+                        $databaseName
                     )
                 );
             }
 
             return true;
         }
 
+        // Check that there are multiple INSERT commands in the sql.
+        $insertPos1 = stripos($sql, 'INSERT INTO');
+        $insertPos2 = strripos($sql, 'INSERT INTO');
+        if (false !== $insertPos1 && $insertPos1 !== $insertPos2) {
+            $insert_queries = (new Parser\InsertMultipleParser())->parse($sql);
+            foreach ($insert_queries as $insert_query) {
+                $this->affectedRows += Processor\InsertProcessor::process(
+                    $this->conn,
+                    new Processor\Scope($this->boundValues),
+                    $insert_query
+                );
+            }
+
+            return true;
+        }
+
         //echo "\n" . $sql . "\n";
 
         try {
@@ -284,6 +306,17 @@ function ($row) {
                 );
                 break;
 
+            case Query\ShowColumnsQuery::class:
+                $this->result = self::processResult(
+                    $this->conn,
+                    Processor\ShowColumnsProcessor::process(
+                        $this->conn,
+                        new Processor\Scope(array_merge($params ?? [], $this->boundValues)),
+                        $parsed_query
+                    )
+                );
+                break;
+
             default:
                 throw new \UnexpectedValueException('Unsupported operation type ' . $sql);
         }
diff --git a/src/FakePdoTrait.php b/src/FakePdoTrait.php
@@ -52,7 +52,7 @@ public function __construct(string $dsn, string $username = '', string $passwd =
         $dsn = \Nyholm\Dsn\DsnParser::parse($dsn);
         $host = $dsn->getHost();
 
-        if (preg_match('/dbname=([a-zA-Z0-9_]+);/', $host, $matches)) {
+        if (preg_match('/dbname=([a-zA-Z0-9_]+)(?:;|$)/', $host, $matches)) {
             $this->databaseName = $matches[1];
         }
 
@@ -87,6 +87,16 @@ public function setAttribute($key, $value)
         return true;
     }
 
+    public function getAttribute($key)
+    {
+        switch ($key) {
+            case \PDO::ATTR_CASE:
+                $value = $this->lowercaseResultKeys ? \PDO::CASE_LOWER : \PDO::CASE_UPPER;
+        }
+
+        return $value;
+    }
+
     public function getServer() : Server
     {
         return $this->server;
diff --git a/src/Parser/CreateTableParser.php b/src/Parser/CreateTableParser.php
@@ -218,7 +218,13 @@ private static function parseCreateTable(array $tokens, string $sql) : CreateQue
             \array_shift($tokens);
         }
 
-        $t = \array_shift($tokens);
+        // Extract [{database}.]{table}
+        if ($tokens[1] === '.') {
+            $t = \array_shift($tokens) . \array_shift($tokens) . \array_shift($tokens);
+        } else {
+            $t = \array_shift($tokens);
+        }
+
         $name = static::decodeIdentifier($t);
 
         if (static::nextTokenIs($tokens, 'LIKE')) {
diff --git a/src/Parser/InsertMultipleParser.php b/src/Parser/InsertMultipleParser.php
@@ -0,0 +1,79 @@
+<?php
+
+namespace Vimeo\MysqlEngine\Parser;
+
+use Vimeo\MysqlEngine\Query\CreateQuery;
+use Vimeo\MysqlEngine\Query\Expression\Expression;
+use Vimeo\MysqlEngine\TokenType;
+use Vimeo\MysqlEngine\Query\InsertQuery;
+
+final class InsertMultipleParser
+{
+    /**
+     * @return array<string, CreateQuery>
+     */
+    public function parse(string $sql): array
+    {
+        return self::walk($this->splitStatements($sql));
+    }
+
+    /**
+     * @var list<string>
+     */
+    private $tokens = [];
+
+    /**
+     * @var array<int, array{0:int, 1:int}>
+     */
+    private $sourceMap = [];
+
+    /**
+     * @return non-empty-list<string>
+     */
+    private function splitStatements(string $sql): array
+    {
+        $re_split_sql = '%
+        # Match an SQL record ending with ";"
+        \s*                                     # Discard leading whitespace.
+        (                                       # $1: Trimmed non-empty SQL record.
+          (?:                                   # Group for content alternatives.
+            \'[^\'\\\\]*(?:\\\\.[^\'\\\\]*)*\'  # Either a single quoted string,
+          | "[^"\\\\]*(?:\\\\.[^"\\\\]*)*"      # or a double quoted string,
+          | /\*[^*]*\*+(?:[^*/][^*]*\*+)*/      # or a multi-line comment,
+          | \#.*                                # or a # single line comment,
+          | --.*                                # or a -- single line comment,
+          | [^"\';#]                            # or one non-["\';#-]
+          )+                                    # One or more content alternatives
+          (?:;|$)                               # Record end is a ; or string end.
+        )                                       # End $1: Trimmed SQL record.
+        %xs';
+
+        if (preg_match_all($re_split_sql, $sql, $matches)) {
+            $statements = $matches[1];
+        }
+
+        return $statements ?? [];
+    }
+
+    /**
+     * @param array<string> $statements
+     *
+     * @return array<string, InsertQuery>
+     */
+    private static function walk(array $statements)
+    {
+        $result = [];
+
+        foreach ($statements as $statement) {
+            $statement = trim($statement);
+            if (false === stripos($statement, 'INSERT INTO')) {
+                continue;
+            }
+            $statement = rtrim($statement, ';');
+
+            $result[] = SQLParser::parse($statement);
+        }
+
+        return $result;
+    }
+}
diff --git a/src/Parser/SQLParser.php b/src/Parser/SQLParser.php
@@ -9,7 +9,9 @@
     InsertQuery,
     UpdateQuery,
     DropTableQuery,
-    ShowTablesQuery};
+    ShowTablesQuery,
+    ShowColumnsQuery
+};
 
 final class SQLParser
 {
@@ -141,11 +143,11 @@ final class SQLParser
         'TABLES' => true,
     ];
 
-    /** @var array<SelectQuery|InsertQuery|UpdateQuery|TruncateQuery|DeleteQuery|DropTableQuery|ShowTablesQuery|ShowIndexQuery> */
+    /** @var array<SelectQuery|InsertQuery|UpdateQuery|TruncateQuery|DeleteQuery|DropTableQuery|ShowTablesQuery|ShowIndexQuery|ShowColumnsQuery> */
     private static $cache = [];
 
     /**
-     * @return SelectQuery|InsertQuery|UpdateQuery|TruncateQuery|DeleteQuery|DropTableQuery|ShowTablesQuery|ShowIndexQuery
+     * @return SelectQuery|InsertQuery|UpdateQuery|TruncateQuery|DeleteQuery|DropTableQuery|ShowTablesQuery|ShowIndexQuery|ShowColumnsQuery
      */
     public static function parse(string $sql)
     {
@@ -157,7 +159,7 @@ public static function parse(string $sql)
     }
 
     /**
-     * @return SelectQuery|InsertQuery|UpdateQuery|TruncateQuery|DeleteQuery|DropTableQuery|ShowTablesQuery|ShowIndexQuery
+     * @return SelectQuery|InsertQuery|UpdateQuery|TruncateQuery|DeleteQuery|DropTableQuery|ShowTablesQuery|ShowIndexQuery|ShowColumnsQuery
      */
     private static function parseImpl(string $sql)
     {
diff --git a/src/Parser/ShowParser.php b/src/Parser/ShowParser.php
@@ -2,9 +2,10 @@
 
 namespace Vimeo\MysqlEngine\Parser;
 
+use Vimeo\MysqlEngine\Query\ShowColumnsQuery;
 use Vimeo\MysqlEngine\Query\ShowIndexQuery;
-use Vimeo\MysqlEngine\TokenType;
 use Vimeo\MysqlEngine\Query\ShowTablesQuery;
+use Vimeo\MysqlEngine\TokenType;
 
 /**
  * Very limited parser for SHOW TABLES LIKE 'foo'
@@ -47,13 +48,21 @@ public function parse()
 
         $this->pointer++;
 
+        // For case with TABLES and COLUMNS could be optinaly used argument FULL.
+        if ($this->tokens[$this->pointer]->value === 'FULL') {
+            $isFull = true;
+            $this->pointer++;
+        }
+
         switch ($this->tokens[$this->pointer]->value) {
             case 'TABLES':
                 return $this->parseShowTables();
             case 'INDEX':
             case 'INDEXES':
             case 'KEYS':
                 return $this->parseShowIndex();
+            case 'COLUMNS':
+                return $this->parseShowColumns($isFull ?? false);
             default:
                 throw new ParserException("Parser error: expected SHOW TABLES");
         }
@@ -64,7 +73,7 @@ private function parseShowTables(): ShowTablesQuery
         $this->pointer++;
 
         if ($this->tokens[$this->pointer]->value !== 'LIKE') {
-            throw new ParserException("Parser error: expected SHOW TABLES LIKE");
+            throw new ParserException("Parser error: expected SHOW [FULL] TABLES LIKE");
         }
 
         $this->pointer++;
@@ -102,6 +111,38 @@ private function parseShowIndex(): ShowIndexQuery
             list($this->pointer, $expression) = $expression_parser->buildWithPointer();
             $query->whereClause = $expression;
         }
+
+        return $query;
+    }
+
+    private function parseShowColumns(bool $isFull): ShowColumnsQuery
+    {
+        $this->pointer++;
+
+        if ($this->tokens[$this->pointer]->value !== 'FROM') {
+            throw new ParserException("Parser error: expected SHOW [FULL] COLUMNS FROM");
+        }
+
+        $this->pointer++;
+
+        $token = $this->tokens[$this->pointer];
+        if ($token->type !== TokenType::IDENTIFIER) {
+            throw new ParserException("Expected table name after FROM");
+        }
+
+        $query = new ShowColumnsQuery($token->value, $this->sql);
+        $query->isFull = $isFull;
+        $this->pointer++;
+
+        if ($this->pointer < count($this->tokens)) {
+            if ($this->tokens[$this->pointer]->value !== 'WHERE') {
+                throw new ParserException("Parser error: expected SHOW [FULL] COLUMNS FROM [TABLE_NAME] WHERE");
+            }
+            $expression_parser = new ExpressionParser($this->tokens, $this->pointer);
+            list($this->pointer, $expression) = $expression_parser->buildWithPointer();
+            $query->whereClause = $expression;
+        }
+
         return $query;
     }
 }
diff --git a/src/Processor/ShowColumnsProcessor.php b/src/Processor/ShowColumnsProcessor.php
diff --git a/src/Query/ShowColumnsQuery.php b/src/Query/ShowColumnsQuery.php
