fix lower case create statement

[initzhang]

The current dbgpt_hub/data_process/sql_data_process.py script does not consider there actually exists lowercase create statements in the spider dataset. For example, activity_1/schema.sql contains create table Activity ... which is not captured by the r"CREATE\s.*?;" pattern in line of code here. The consequence is that some samples in the example_text2sql_dev.json have blank Instruction field when enable the --code_representation:

{
    "db_id": "pets_1",
    "instruction": "I want you to act as a SQL terminal in front of an example database, you need only to return the sql command to me.Below is an instruction that describes a task,      Write a response that appropriately completes the request.\n\"\n##Instruction:\n[]\n",
    "input": "###Input:\nHow many dog pets are raised by female students?\n\n###Response:",
    "output": "SELECT count(*) FROM student AS T1 JOIN has_pet AS T2 ON T1.stuid  =  T2.stuid JOIN pets AS T3 ON T2.petid  =  T3.petid WHERE T1.sex  =  'F' AND T3.pettype  =  'dog'",
"history": []
}

This pull request makes the specific pattern case-insensitive to fix this problem.

create_statements = re.findall(
    r"CREATE\s.*?;", schema_content, re.DOTALL**|re.IGNORECASE**
)

[wangzaistone]

r+ , it's a good detail