Make process_statement() a generator

[sqlconvert.git] / sqlconvert / process_mysql.py

diff --git a/sqlconvert/process_mysql.py b/sqlconvert/process_mysql.py
index f91f516d2d9236f53dd320f5eb2a958545d54c9d..9bfef92de598c09c68f99623d1b2cdd1de157273 100644 (file)
--- a/sqlconvert/process_mysql.py
+++ b/sqlconvert/process_mysql.py
@@ -1,6 +1,7 @@
 
 from sqlparse.sql import Comment
 from sqlparse import tokens as T
+from .process_tokens import escape_strings
 
 
 def _is_directive_token(token):
@@ -49,6 +50,30 @@ def requote_names(token_list):
                 token.normalized = token.value = '"%s"' % value
 
 
-def process_statement(statement):
+def unescape_strings(token_list):
+    """Unescape strings"""
+    for token in token_list.flatten():
+        if token.ttype is T.String.Single:
+            value = token.value
+            for orig, repl in (
+                ('\\"', '"'),
+                ("\\'", "'"),
+                ("''", "'"),
+                ('\\b', '\b'),
+                ('\\n', '\n'),
+                ('\\r', '\r'),
+                ('\\t', '\t'),
+                ('\\\032', '\032'),
+                ('\\\\', '\\'),
+            ):
+                value = value.replace(orig, repl)
+            token.normalized = token.value = value
+
+
+def process_statement(statement, quoting_style='sqlite'):
     remove_directive_tokens(statement)
     requote_names(statement)
+    unescape_strings(statement)
+    escape_strings(statement, quoting_style)
+    yield statement
+    return