Alert user of DB table permission errors via WP_CLI::warning()

Co-authored-by: swissspidy <841956+swissspidy@users.noreply.github.com>

Author: Copilot

features/search-replace.feature

@@ -1573,3 +1573,17 @@ Feature: Do global search/replace
       """
       --old-content
       """
+
+
+  @require-mysql
+  Scenario: Warn when updating a table fails due to a database error
+    Given a WP install
+    And I run `wp db query "CREATE TABLE wp_readonly_test ( id int(11) unsigned NOT NULL AUTO_INCREMENT, data TEXT, PRIMARY KEY (id) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;"`
+    And I run `wp db query "INSERT INTO wp_readonly_test (data) VALUES ('old-value');"`
+    And I run `wp db query "CREATE TRIGGER prevent_update BEFORE UPDATE ON wp_readonly_test FOR EACH ROW SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Table is read-only';"`
+
+    When I try `wp search-replace old-value new-value wp_readonly_test --all-tables-with-prefix`
+    Then STDERR should contain:
+      """
+      Error updating column 'data' in table 'wp_readonly_test'
+      """

src/Search_Replace_Command.php

@@ -685,6 +685,9 @@ private function sql_handle_col( $col, $primary_keys, $table, $old, $new ) {
 				// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- escaped through self::esc_sql_ident
 				$count = (int) $wpdb->query( $wpdb->prepare( "UPDATE $table_sql SET $col_sql = REPLACE($col_sql, %s, %s);", $old, $new ) );
 			}
+			if ( $wpdb->last_error ) {
+				WP_CLI::warning( sprintf( "Error updating column '%s' in table '%s': %s", $col, $table, $wpdb->last_error ) );
+			}
 		}
 
 		if ( $this->verbose && 'table' === $this->format ) {
@@ -771,6 +774,9 @@ static function ( $key ) {
 					}
 
 					$wpdb->update( $table, [ $col => $value ], $update_where );
+					if ( $wpdb->last_error ) {
+						WP_CLI::warning( sprintf( "Error updating column '%s' in table '%s': %s", $col, $table, $wpdb->last_error ) );
+					}
 				}
 			}