/
ddit_pg.py
197 lines (171 loc) · 7.35 KB
/
ddit_pg.py
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import os
import re
import sys
import glob
import env/conf
import psycopg2
import xlsxwriter
try:
conn = psycopg2.connect(
user = conf.db_user,
password = conf.db_pwd,
host = conf.db_host,
database = conf.db_name)
cur = conn.cursor()
for file_path in glob.glob(os.path.join('data/', '*.txt')):
with open(file_path,'r') as f:
file_name = os.path.basename(file_path)
table_name = os.path.splitext(file_name)[0]
# open file and read first row
first_row = f.readline()
# populate list with column headers
header_list = first_row.split('\t')
create_column = ''
# create sttm
ws_lnd_header = (['Source','DB Name','Table Name','Column Name','Data Type'])
ws_tst_header = (['Source','DB Name','Table Name','Column Name','Data Type'])
ws_raw_header = (['Source','DB Name','Table Name','Column Name','Data Type'])
ws_lnd_data = []
ws_tst_data = []
ws_raw_data = []
lnd_source = ''
lnd_db_name = 'lnd_db'
lnd_table_name = ''
tst_source = ''
tst_db_name = 'tst_db'
tst_table_name = ''
raw_source = ''
raw_db_name = 'raw_db'
raw_table_name = ''
# loop through column header
for idx, val in enumerate(header_list):
if re.search('_num', val):
ws_lnd_data.append([file_name, lnd_db_name, table_name, val, ' numeric(13,2)'])
ws_tst_data.append([file_name, lnd_db_name, table_name, val, ' numeric(13,2)'])
ws_raw_data.append([file_name, raw_db_name, table_name, val, ' numeric(13,2)'])
elif re.search('_int', val):
ws_lnd_data.append([file_name, lnd_db_name, table_name, val, ' int'])
ws_tst_data.append([file_name, lnd_db_name, table_name, val, ' int'])
ws_raw_data.append([file_name, raw_db_name, table_name, val, ' int'])
elif re.search('_bint', val):
ws_lnd_data.append([file_name, lnd_db_name, table_name, val, ' bigint'])
ws_tst_data.append([file_name, lnd_db_name, table_name, val, ' bigint'])
ws_raw_data.append([file_name, raw_db_name, table_name, val, ' bigint'])
elif re.search('_dt', val):
ws_lnd_data.append([file_name, lnd_db_name, table_name, val, ' date'])
ws_tst_data.append([file_name, lnd_db_name, table_name, val, ' date'])
ws_raw_data.append([file_name, raw_db_name, table_name, val, ' date'])
elif re.search('_ts', val):
ws_lnd_data.append([file_name, lnd_db_name, table_name, val, ' timestamp'])
ws_tst_data.append([file_name, lnd_db_name, table_name, val, ' timestamp'])
ws_raw_data.append([file_name, raw_db_name, table_name, val, ' timestamp'])
elif re.search('_chr', val):
ws_lnd_data.append([file_name, lnd_db_name, table_name, val, ' chr(1)'])
ws_tst_data.append([file_name, lnd_db_name, table_name, val, ' chr(1)'])
ws_raw_data.append([file_name, raw_db_name, table_name, val, ' chr(1)'])
elif re.search('_vc', val):
ws_lnd_data.append([file_name, lnd_db_name, table_name, val, ' varchar(50)'])
ws_tst_data.append([file_name, lnd_db_name, table_name, val, ' varchar(50)'])
ws_raw_data.append([file_name, raw_db_name, table_name, val, ' varchar(50)'])
else:
ws_lnd_data.append([file_name, lnd_db_name, table_name, val, ' text'])
ws_tst_data.append([file_name, lnd_db_name, table_name, val, ' text'])
ws_raw_data.append([file_name, raw_db_name, table_name, val, ' text'])
# create xlsx workbook, worksheets
wb = xlsxwriter.Workbook('sttm/' + table_name + '.xlsx')
ws_lnd = wb.add_worksheet('LND')
ws_tst = wb.add_worksheet('TST')
ws_raw = wb.add_worksheet('RAW')
# create header in lnd
row = 0
col = 0
for i in (ws_lnd_header):
ws_lnd.write(row,col,i)
col += 1
# write lnd data
for row_num, row_data in enumerate(ws_lnd_data):
for col_num, col_data in enumerate(row_data):
ws_lnd.write(row_num + 1, col_num, col_data)
# create header in tst
row = 0
col = 0
for i in (ws_tst_header):
ws_tst.write(row,col,i)
col += 1
# write tst data
for row_num, row_data in enumerate(ws_tst_data):
for col_num, col_data in enumerate(row_data):
ws_tst.write(row_num + 1, col_num, col_data)
# create header in raw
row = 0
col = 0
for i in (ws_raw_header):
ws_raw.write(row,col,i)
col += 1
# write raw data
for row_num, row_data in enumerate(ws_raw_data):
for col_num, col_data in enumerate(row_data):
ws_raw.write(row_num + 1, col_num, col_data)
wb.close()
# populate variables to create sql that will create the table
for idx, val in enumerate(header_list):
if re.search('_num', val):
# create logic to determine length and decimal places
if len(create_column) == 0:
create_column = val + ' numeric(13,2) null'
else:
create_column = create_column + ', ' + val + ' numeric(13,2) null'
elif re.search('_int', val):
if len(create_column) == 0:
create_column = val + ' int null'
else:
create_column = create_column + ', ' + val + ' int null'
elif re.search('_bint', val):
if len(create_column) == 0:
create_column = val + ' bigint null'
else:
create_column = create_column + ', ' + val + ' bigint null'
elif re.search('_dt', val):
if len(create_column) == 0:
create_column = val + ' date null'
else:
create_column = create_column + ', ' + val + ' date null'
# create time suffix
elif re.search('_ts', val):
if len(create_column) == 0:
create_column = val + ' timestamp null'
else:
create_column = create_column + ', ' + val + ' timestamp null'
elif re.search('_chr', val):
# create logic for length
if len(create_column) == 0:
create_column = val + ' char(1) null'
else:
create_column = create_column + ', ' + val + ' char(1) null'
elif re.search('_vc', val):
# create logic to determine length with a max of 255
if len(create_column) == 0:
create_column = val + ' varchar(50) null'
else:
create_column = create_column + ', ' + val + ' varchar(50) null'
else:
if len(create_column) == 0:
create_column = val + ' text null'
else:
create_column = create_column + ', ' + val + ' text null'
# compile table sql
create_sql = 'create table if not exists ' + conf.db_schema + '.' + table_name + ' (' + create_column + ');'
cur.execute(create_sql)
conn.commit()
# ingest file to table
f.seek(0, 0)
next(f)
cur.copy_from(f,conf.db_schema + '.' + table_name, sep='\t')
conn.commit()
# perform data ingestion validation
# write data ingestion validation to the db
except psycopg2.Error as ex:
print("An error occurred while connecting to database: ", {ex})
sys.exit(1)
finally:
conn.close()