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Finished database model
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#!/usr/bin/env python | ||
# | ||
# -*- coding: utf-8 -*- | ||
# | ||
# Copyright (C) 2011 by Aevum Softwares LTDA ME | ||
# | ||
# This is free software: you can redistribute it and/or modify | ||
# it under the terms of the GNU General Public License as published by | ||
# the Free Software Foundation, either version 3 of the License, or | ||
# (at your option) any later version. | ||
# | ||
# This program is distributed in the hope that it will be useful, | ||
# but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
# GNU General Public License for more details. | ||
# | ||
# You should have received a copy of the GNU General Public License | ||
# along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
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import sys | ||
import optparse | ||
import os | ||
import re | ||
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__version__ = 0.1 | ||
SEQUENCE_SUFFIX = "sequence" | ||
SCHEMA = ""; | ||
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def remove_comments(string): | ||
string = re.sub(re.compile("/\*.*?\*/", re.DOTALL), "", string) # remove all block comments (/*COMMENT */) | ||
string = re.sub(re.compile("//.*?\n"), "", string) # remove all single line comments (//COMMENT\n) | ||
return string | ||
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def remove_lines_started_with(word, lines): | ||
toRemove = [] | ||
for line in lines: | ||
if line.startswith(word): | ||
toRemove.append(line) | ||
for line in toRemove: | ||
lines.remove(line) | ||
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def remove_lines_with(word, lines): | ||
toRemove = [] | ||
for line in lines: | ||
if word in line: | ||
toRemove.append(line) | ||
for line in toRemove: | ||
lines.remove(line) | ||
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def remove_word(word, lines, numberOfNextWords=0): | ||
substitute = "@@@" | ||
for i in range(len(lines)): | ||
if not numberOfNextWords: | ||
lines[i] = lines[i].replace(word, "") | ||
else: | ||
line = lines[i] | ||
line = line.replace(word, substitute) | ||
if substitute in line: | ||
split = line.split() | ||
nextWords = [] | ||
for j in range(len(split)): | ||
if split[j] == substitute: | ||
for k in range(numberOfNextWords): | ||
nextWords.append(split[k + j + 1]) | ||
replaceString = substitute | ||
for k in range(numberOfNextWords): | ||
replaceString = "{0} {1}".format(replaceString, nextWords[k]) | ||
lines[i] = line.replace(replaceString, "") | ||
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def put_semicolons(lines): | ||
numberOfOpenningParenthesis = 0 | ||
numberOfClosingParenthesis = 0 | ||
for i in range(len(lines)): | ||
line = lines[i] | ||
split = lines[i].split() | ||
if "CREATE" in split and "TABLE" in split: | ||
if split.index("CREATE") == split.index("TABLE") - 1: | ||
numberOfOpenningParenthesis = 0 | ||
numberOfClosingParenthesis = 0 | ||
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while "(" in line: | ||
line = line.replace("(", "", 1) | ||
numberOfOpenningParenthesis = numberOfOpenningParenthesis + 1 | ||
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while ")" in line: | ||
line = line.replace(")", "", 1) | ||
numberOfClosingParenthesis = numberOfClosingParenthesis + 1 | ||
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if numberOfOpenningParenthesis == numberOfClosingParenthesis: | ||
if numberOfOpenningParenthesis != 0: | ||
lines[i] = lines[i].replace("\n", "") + ";\n" | ||
numberOfOpenningParenthesis = 0 | ||
numberOfClosingParenthesis = 0 | ||
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def create_sequences(lines): | ||
sequences = [] | ||
lastTable = None | ||
for i in range(len(lines)): | ||
line = lines[i] | ||
split = line.split() | ||
if "CREATE" in split and "TABLE" in split: | ||
if split.index("CREATE") == split.index("TABLE") - 1: | ||
lastTable = split[split.index("CREATE") + 2] | ||
elif "AUTO_INCREMENT" in line: | ||
if "." in lastTable: | ||
spl = lastTable.replace("\"", "").split(".") | ||
schema = "\"" + spl[0] + "\"." | ||
table = spl[1] | ||
else: | ||
table = lastTable.replace("\"", "") | ||
schema = "" | ||
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column = split[0].replace("\"", "") | ||
sequences.append({"table": table, "column": column, "schema": schema}) | ||
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for sequence in sequences: | ||
lines.append("{0} {1}\"{2}_{3}_{4}\";\n".format( | ||
"DROP SEQUENCE IF EXISTS", | ||
sequence["schema"], | ||
sequence["table"], | ||
sequence["column"], | ||
SEQUENCE_SUFFIX)) | ||
lines.append("{0} {1}\"{2}_{3}_{4}\";\n".format( | ||
"CREATE SEQUENCE ", | ||
sequence["schema"], | ||
sequence["table"], | ||
sequence["column"], | ||
SEQUENCE_SUFFIX)) | ||
lines.append("ALTER TABLE {0}\"{1}\" ALTER COLUMN \"{2}\" SET DEFAULT NEXTVAL('{0}\"{1}_{2}_{3}\"');\n".format( | ||
sequence["schema"], | ||
sequence["table"], | ||
sequence["column"], | ||
SEQUENCE_SUFFIX,)) | ||
def get_current_schema(lines): | ||
for line in lines: | ||
if "CREATE SCHEMA" in line: | ||
return re.sub('\s+',' ',line.replace(';', '').replace('"', '')).strip().split(' ')[-1] | ||
elif "CREATE TABLE" in line: | ||
tbl = re.search("CREATE TABLE (.*) \(", line).group(1).replace('"', '') | ||
if "." in tbl: | ||
return tbl.split('.')[0].strip() | ||
return None | ||
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def set_schema(lines): | ||
currSchema = get_current_schema(lines) | ||
if currSchema == None: | ||
print("There is no schema set on the original script! Will default to public schema") # Not implemented: add schema to all statements | ||
else: | ||
for i in range(len(lines)): | ||
line = lines[i] | ||
regex = re.compile("((" + currSchema + ")(\")?(\.|;))") | ||
search = regex.search(line) | ||
if search: | ||
sufix = '' | ||
if search.group(3): | ||
sufix += search.group(3); | ||
if search.group(4): | ||
sufix += search.group(4) | ||
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line = re.sub(regex, SCHEMA + sufix, line) | ||
lines[i] = line | ||
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def replace_word(word, replace, lines): | ||
for i in range(len(lines)): | ||
lines[i] = lines[i].replace(word, replace) | ||
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def replace_regex(search, replace, lines): | ||
for i in range(len(lines)): | ||
lines[i] = re.sub(re.compile(search), replace, lines[i]) | ||
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def add_cascade_to_drops(lines): | ||
for i in range(len(lines)): | ||
line = lines[i] | ||
if line.startswith("DROP"): | ||
lines[i] = line.replace(";", "CASCADE;") | ||
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def convert(input, output): | ||
contents = input.read() | ||
lines = remove_comments(contents).splitlines(True) | ||
remove_lines_with("ASC)", lines) | ||
remove_lines_started_with("SET", lines) | ||
remove_lines_started_with("COLLATE", lines) | ||
remove_lines_started_with("ENGINE", lines) | ||
remove_lines_started_with("COMMENT", lines) | ||
remove_lines_started_with("PACK_KEYS", lines) | ||
replace_regex("COMMENT .*,\n", ",\n", lines) | ||
remove_word(" COMMENT ", lines) | ||
remove_lines_started_with("USE", lines) | ||
replace_word("`", "\"", lines) | ||
#remove_word("'", lines) # this breaks DEFAULT '' statements | ||
remove_word("UNSIGNED", lines) | ||
remove_word("IF NOT EXISTS", lines) | ||
replace_regex("CREATE SCHEMA (.*);", r"CREATE SCHEMA IF NOT EXISTS \1;", lines) | ||
remove_word("DEFAULT CHARACTER SET =", lines, 1) | ||
remove_word("DEFAULT CHARACTER SET", lines, 1) | ||
remove_word("CHARACTER SET", lines, 1) | ||
remove_word("COLLATE", lines, 1) | ||
replace_word("DATETIME", "TIMESTAMP", lines) | ||
replace_word("TINYINT(1)", "BOOLEAN", lines) | ||
replace_word("LONGTEXT", "TEXT", lines) | ||
replace_regex("INT\(\d*\)", "INT", lines) | ||
remove_word("CONSTRAINT \"\"", lines) | ||
remove_word("FOREIGN KEY ()", lines) | ||
put_semicolons(lines) | ||
add_cascade_to_drops(lines) | ||
create_sequences(lines) | ||
remove_word("AUTO_INCREMENT", lines) | ||
if SCHEMA != "": | ||
set_schema(lines); | ||
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output.writelines(lines) | ||
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def main(args): | ||
"""Check arguments from the command line and executed the required action""" | ||
parser = optparse.OptionParser( | ||
usage="Usage: %prog [options] <input_file> [<output_file>]", | ||
version="%prog {0}".format(__version__)) | ||
parser.add_option("-s", "--schema", | ||
action="store", dest="schema", | ||
help="Schema name for the Postgre script. Default value is the table name for MySQL Workbench."); | ||
# parser.add_option("-o", "--output", | ||
# action="store", dest="output", | ||
# help="Generates the output") | ||
(options, args) = parser.parse_args() | ||
if len(args) > 0: | ||
input_path = args[0] | ||
if not os.path.exists(input_path): | ||
print("First argument should be a valid sql file") | ||
return | ||
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if len(args) < 2: | ||
output_path = "{0}_postgre.{1}".format(*input_path.rsplit('.', 1)) | ||
else: | ||
output_path = args[1] | ||
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if options.schema != "" and options.schema != None: | ||
global SCHEMA | ||
SCHEMA = options.schema | ||
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input = open(input_path, "r") | ||
output = open(output_path, "w") | ||
convert(input, output) | ||
else: | ||
print ("Invalid parameters. You should run YYY <input> [<output>]") | ||
return | ||
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if __name__ == "__main__": | ||
main(sys.argv) | ||
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