Fix incorrect types

Signed-off-by: Kamil Tekiela <tekiela246@gmail.com>

Author: kamil-tekiela

phpstan-baseline.neon

@@ -556,12 +556,12 @@ parameters:
 			path: src/Statements/ExplainStatement.php
 
 		-
-			message: "#^Property PhpMyAdmin\\\\SqlParser\\\\Statements\\\\ExplainStatement\\:\\:\\$connectionId \\(int\\|null\\) does not accept mixed\\.$#"
+			message: "#^Cannot cast mixed to string\\.$#"
 			count: 1
 			path: src/Statements/ExplainStatement.php
 
 		-
-			message: "#^Property PhpMyAdmin\\\\SqlParser\\\\Statements\\\\ExplainStatement\\:\\:\\$explainedColumn \\(string\\|null\\) does not accept mixed\\.$#"
+			message: "#^Property PhpMyAdmin\\\\SqlParser\\\\Statements\\\\ExplainStatement\\:\\:\\$connectionId \\(int\\|null\\) does not accept mixed\\.$#"
 			count: 1
 			path: src/Statements/ExplainStatement.php
 
@@ -605,11 +605,6 @@ parameters:
 			count: 1
 			path: src/Statements/MaintenanceStatement.php
 
-		-
-			message: "#^Property PhpMyAdmin\\\\SqlParser\\\\Statements\\\\PurgeStatement\\:\\:\\$endExpr \\(string\\|null\\) does not accept PhpMyAdmin\\\\SqlParser\\\\Components\\\\Expression\\|null\\.$#"
-			count: 1
-			path: src/Statements/PurgeStatement.php
-
 		-
 			message: "#^Property PhpMyAdmin\\\\SqlParser\\\\Statements\\\\PurgeStatement\\:\\:\\$endOption \\(string\\|null\\) does not accept mixed\\.$#"
 			count: 1

psalm-baseline.xml

@@ -784,9 +784,6 @@
                             )]]></code>
       <code>ArrayObj::parse($parser, $list)</code>
     </PropertyTypeCoercion>
-    <RedundantConditionGivenDocblockType>
-      <code><![CDATA[$this->fields instanceof ArrayObj]]></code>
-    </RedundantConditionGivenDocblockType>
   </file>
   <file src="src/Statements/DeleteStatement.php">
     <MixedArgument>
@@ -825,7 +822,6 @@
   <file src="src/Statements/ExplainStatement.php">
     <MixedAssignment>
       <code><![CDATA[$this->connectionId]]></code>
-      <code><![CDATA[$this->explainedColumn]]></code>
       <code><![CDATA[$this->explainedDatabase]]></code>
       <code><![CDATA[$this->explainedTable]]></code>
     </MixedAssignment>
@@ -880,9 +876,6 @@
     </PossiblyUnusedProperty>
   </file>
   <file src="src/Statements/PurgeStatement.php">
-    <ImplicitToStringCast>
-      <code>Expression::parse($parser, $list, [])</code>
-    </ImplicitToStringCast>
     <MixedAssignment>
       <code><![CDATA[$this->endOption]]></code>
       <code><![CDATA[$this->logType]]></code>

src/Statements/CreateStatement.php

@@ -378,10 +378,10 @@ class CreateStatement extends Statement
     public function build(): string
     {
         $fields = '';
-        if (! empty($this->fields)) {
+        if ($this->fields !== null && $this->fields !== []) {
             if (is_array($this->fields)) {
                 $fields = CreateDefinition::buildAll($this->fields) . ' ';
-            } elseif ($this->fields instanceof ArrayObj) {
+            } else {
                 $fields = $this->fields->build();
             }
         }
@@ -569,7 +569,7 @@ public function parse(Parser $parser, TokensList $list): void
                 }
             } else {
                 $this->fields = CreateDefinition::parse($parser, $list);
-                if (empty($this->fields)) {
+                if ($this->fields === []) {
                     $parser->error('At least one column definition was expected.', $list->tokens[$list->idx]);
                 }
 

src/Statements/ExplainStatement.php

@@ -215,8 +215,8 @@ public function parse(Parser $parser, TokensList $list): void
                     continue;
                 }
 
-                if ($this->explainedColumn === null) {
-                    $this->explainedColumn = $token->value;
+                if ($this->explainedColumn === null && $token->value !== null) {
+                    $this->explainedColumn = (string) $token->value;
                 }
             }
         }

src/Statements/PurgeStatement.php

@@ -35,7 +35,7 @@ class PurgeStatement extends Statement
     /**
      * The end expr of this query.
      */
-    public string|null $endExpr = null;
+    public Expression|null $endExpr = null;
 
     public function build(): string
     {