Fix bug #81343: inconsistent type conversion after closeCursor

S->cols is already freed in the statement destructor and since
caa7100 the column data is only
populated on the first execute() which means that on subsequent
execute()s after closeCursor was called, all meta-data for column types
was removed and never restored

Closes phpGH-7355.

NEWS

@@ -23,6 +23,10 @@ PHP                                                                        NEWS
   . Fixed bug #81349 (mb_detect_encoding misdetcts ASCII in some cases).
     (Nikita)
 
+- PDO PgSQL:
+  . Fixed bug #81343 (pdo_pgsql: Inconsitent boolean conversion after calling
+    closeCursor()). (Philip Hofstetter)
+
 - Phar:
   . Use SHA256 by default for signature. (remi)
   . Add support for OpenSSL_SHA256 and OpenSSL_SHA512 signature. (remi)

ext/pdo_pgsql/pgsql_statement.c

@@ -240,8 +240,8 @@ static int pgsql_stmt_execute(pdo_stmt_t *stmt)
 		return 0;
 	}
 
-	if (!stmt->executed && (!stmt->column_count || S->cols == NULL)) {
-		stmt->column_count = (int) PQnfields(S->result);
+	stmt->column_count = (int) PQnfields(S->result);
+	if (S->cols == NULL) {
 		S->cols = ecalloc(stmt->column_count, sizeof(pdo_pgsql_column));
 	}
 
@@ -674,12 +674,6 @@ static int pgsql_stmt_get_column_meta(pdo_stmt_t *stmt, zend_long colno, zval *r
 
 static int pdo_pgsql_stmt_cursor_closer(pdo_stmt_t *stmt)
 {
-	pdo_pgsql_stmt *S = (pdo_pgsql_stmt*)stmt->driver_data;
-
-	if (S->cols != NULL){
-		efree(S->cols);
-		S->cols = NULL;
-	}
 	return 1;
 }
 

ext/pdo_pgsql/tests/bug81343.phpt

@@ -0,0 +1,27 @@
+--TEST--
+Bug #81343 pdo_pgsql: Inconsitent boolean conversion after calling closeCursor()
+--EXTENSIONS--
+pdo
+pdo_pgsql
+--SKIPIF--
+<?php
+require __DIR__ . '/config.inc';
+require __DIR__ . '/../../../ext/pdo/tests/pdo_test.inc';
+PDOTest::skip();
+?>
+--FILE--
+<?php
+require __DIR__ . '/../../../ext/pdo/tests/pdo_test.inc';
+$pdo = PDOTest::test_factory(__DIR__ . '/common.phpt');
+$pdo->setAttribute(PDO::ATTR_STRINGIFY_FETCHES, false);
+$sth = $pdo->prepare("select false where 2=?");
+
+for ($i = 0; $i < 2; $i++) {
+    $sth->execute([2]);
+    var_dump($sth->fetchColumn(0));
+    $sth->closeCursor();
+}
+?>
+--EXPECT--
+bool(false)
+bool(false)