Alert in status report if base table is not present.

Also add a tool to rerun the check. This needs newer API version to work.

includes/admin/class-wc-admin-status.php

@@ -339,6 +339,29 @@ class WC_Admin_Status {
 		}
 	}
 
+	/**
+	 * Prints table info if a base table is not present.
+	 */
+	private static function output_tables_info() {
+		$missing_tables = WC_Install::verify_base_tables( false );
+		if ( 0 === count( $missing_tables ) ) {
+			return;
+		}
+		?>
+
+		<br>
+		<strong style="color:#a00;">
+			<span class="dashicons dashicons-warning"></span>
+			<?php
+				esc_html_e( 'Missing base tables: ', 'woocommerce' );
+				echo esc_html( implode( ', ', $missing_tables ) );
+				esc_html_e( '. Some WooCommerce functionality may not work as expected.', 'woocommerce' );
+			?>
+		</strong>
+
+		<?php
+	}
+
 	/**
 	 * Prints the information about plugins for the system status report.
 	 * Used for both active and inactive plugins sections.

includes/admin/views/html-admin-page-status-report.php

@@ -496,10 +496,17 @@ $untested_plugins   = $plugin_updates->get_untested_plugins( WC()->version, 'min
 		?>
 	</tbody>
 </table>
-<table class="wc_status_table widefat" cellspacing="0">
+<table id="status-database" class="wc_status_table widefat" cellspacing="0">
 	<thead>
 	<tr>
-		<th colspan="3" data-export-label="Database"><h2><?php esc_html_e( 'Database', 'woocommerce' ); ?></h2></th>
+		<th colspan="3" data-export-label="Database">
+			<h2>
+				<?php
+					esc_html_e( 'Database', 'woocommerce' );
+					self::output_tables_info();
+				?>
+			</h2>
+		</th>
 	</tr>
 	</thead>
 	<tbody>