[BUG] Import failed with quoted constraint name

**Describe the bug**
When SQL code contains quoted constraint name, it is failed to import

**To Reproduce**
Steps to reproduce the behavior:
1. Try to import the following code:
```sql
CREATE TABLE books (
id UUID NOT NULL,
CONSTRAINT "PK_books" PRIMARY KEY (id)
);
```
2. See error (on attached screenshot)
3. The following code does not produce error:
```sql
CREATE TABLE books (
id UUID NOT NULL,
CONSTRAINT PK_books PRIMARY KEY (id)
);
```

**Expected behavior**
SQL script successfully imported

**Screenshots**