Build(GHActions): Use `checkout@v4` instead of outdated `v2`

[sqlconvert.git] / sqlconvert / process_mysql.py

diff --git a/sqlconvert/process_mysql.py b/sqlconvert/process_mysql.py
index c375f797a91d12b7a34e9fcde629ea988f2d9252..c89d6d190940dad18230043b6ae77da89bfababf 100644 (file)
--- a/sqlconvert/process_mysql.py
+++ b/sqlconvert/process_mysql.py
@@ -1,5 +1,6 @@
 
-from sqlparse.sql import Comment, Function, Identifier, Parenthesis, Statement
+from sqlparse.sql import Comment, Function, Identifier, Parenthesis, \
+    Statement, Token, Values
 from sqlparse import tokens as T
 from .process_tokens import escape_strings, is_comment_or_space
 
@@ -70,22 +71,28 @@ def unescape_strings(token_list):
             token.normalized = token.value = value
 
 
-def is_insert(statement):
+def get_DML_type(statement):
     for token in statement.tokens:
         if is_comment_or_space(token):
             continue
-        return (token.ttype is T.DML) and (token.normalized == 'INSERT')
+        if (token.ttype is T.DML):
+            return token.normalized
+        break
+    raise ValueError("Not a DML statement")
 
 
 def split_ext_insert(statement):
     """Split extended INSERT into multiple standard INSERTs"""
     insert_tokens = []
     values_tokens = []
-    last_token = None
+    end_tokens = []
     expected = 'INSERT'
     for token in statement.tokens:
         if is_comment_or_space(token):
-            insert_tokens.append(token)
+            if expected == 'END':
+                end_tokens.append(token)
+            else:
+                insert_tokens.append(token)
             continue
         elif expected == 'INSERT':
             if (token.ttype is T.DML) and (token.normalized == 'INSERT'):
@@ -103,6 +110,14 @@ def split_ext_insert(statement):
                 expected = 'VALUES'
                 continue
         elif expected == 'VALUES':
+            if isinstance(token, Values):
+                for subtoken in token.tokens:
+                    if isinstance(subtoken, Parenthesis):
+                        values_tokens.append(subtoken)
+                insert_tokens.append(Token(T.Keyword, 'VALUES'))
+                insert_tokens.append(Token(T.Whitespace, ' '))
+                expected = 'VALUES_OR_SEMICOLON'
+                continue
             if (token.ttype is T.Keyword) and (token.normalized == 'VALUES'):
                 insert_tokens.append(token)
                 expected = 'VALUES_OR_SEMICOLON'
@@ -115,27 +130,35 @@ def split_ext_insert(statement):
                 if token.value == ',':
                     continue
                 elif token.value == ';':
-                    last_token = token
-                    break
+                    end_tokens.append(token)
+                    expected = 'END'
+                    continue
         raise ValueError(
             'SQL syntax error: expected "%s", got %s "%s"' % (
                 expected, token.ttype, token.normalized))
-    for values in values_tokens:
-        # The statemnt sets `parent` attribute of the every token to self
+    new_line = Token(T.Newline, '\n')
+    new_lines = [new_line]  # Insert newlines between split statements
+    for i, values in enumerate(values_tokens):
+        if i == len(values_tokens) - 1:  # Last but one statement
+            # Insert newlines only between split statements but not after
+            new_lines = []
+        # The statement sets `parent` attribute of the every token to self
         # but we don't care.
-        vl = [values]
-        if last_token:
-            vl.append(last_token)
-        statement = Statement(insert_tokens + vl)
+        statement = Statement(insert_tokens + [values] +
+                              end_tokens + new_lines)
         yield statement
 
 
-def process_statement(statement, quoting_style='sqlite'):
+def process_statement(statement, dbname='sqlite'):
     requote_names(statement)
     unescape_strings(statement)
     remove_directive_tokens(statement)
-    escape_strings(statement, quoting_style)
-    if is_insert(statement):
+    escape_strings(statement, dbname)
+    try:
+        dml_type = get_DML_type(statement)
+    except ValueError:
+        dml_type = 'UNKNOWN'
+    if dml_type == 'INSERT':
         for statement in split_ext_insert(statement):
             yield statement
     else: