Merge pull request #104 from kitloong/feature/json

Fallback to longText if CHECK_CONSTRAINTS is not available

Author: kitloong

src/Repositories/MariaDBRepository.php

@@ -2,27 +2,33 @@
 
 namespace KitLoong\MigrationsGenerator\Repositories;
 
+use Illuminate\Database\QueryException;
 use Illuminate\Support\Facades\DB;
 use KitLoong\MigrationsGenerator\Repositories\Entities\MariaDB\CheckConstraint;
 
 class MariaDBRepository extends Repository
 {
     /**
      * Get a check constraint definition with `json_valid` by column.
+     * See https://mariadb.com/kb/en/information-schema-check_constraints-table/
      *
      * @param  string  $table  Table name.
      * @param  string  $column  Column name.
      * @return \KitLoong\MigrationsGenerator\Repositories\Entities\MariaDB\CheckConstraint|null
      */
     public function getCheckConstraintForJson(string $table, string $column): ?CheckConstraint
     {
-        $column = DB::selectOne(
-            "SELECT * FROM INFORMATION_SCHEMA.CHECK_CONSTRAINTS
-            WHERE TABLE_NAME = '$table'
-                AND CONSTRAINT_SCHEMA = '" . DB::getDatabaseName() . "'
-                AND LEVEL = 'Column'
-                AND CHECK_CLAUSE LIKE '%json_valid(`$column`)%'"
-        );
-        return $column === null ? null : new CheckConstraint($column);
+        try {
+            // CHECK_CONSTRAINTS available MariaDB starting with 10.2.22
+            $column = DB::selectOne(
+                "SELECT * FROM INFORMATION_SCHEMA.CHECK_CONSTRAINTS
+                WHERE TABLE_NAME = '$table'
+                    AND CONSTRAINT_SCHEMA = '" . DB::getDatabaseName() . "'
+                    AND CHECK_CLAUSE LIKE '%json_valid(`$column`)%'"
+            );
+            return $column === null ? null : new CheckConstraint($column);
+        } catch (QueryException $exception) {
+            return null;
+        }
     }
 }