From a68d54d744ccfe0a7960c06e75bc36e3c1801393 Mon Sep 17 00:00:00 2001 From: Serhiy Storchaka Date: Sat, 21 Mar 2020 15:53:28 +0200 Subject: [PATCH] bpo-39652: Truncate the column name after '[' only if PARSE_COLNAMES is set. (GH-18942) (cherry picked from commit b146568dfcbcd7409c724f8917e4f77433dd56e4) Co-authored-by: Serhiy Storchaka --- Doc/library/sqlite3.rst | 7 +++-- Lib/sqlite3/test/regression.py | 2 +- Lib/sqlite3/test/types.py | 6 ++-- .../2020-03-11-23-08-25.bpo-39652.gbasrk.rst | 2 ++ Modules/_sqlite/cursor.c | 29 ++++++++++++++----- 5 files changed, 32 insertions(+), 14 deletions(-) create mode 100644 Misc/NEWS.d/next/Library/2020-03-11-23-08-25.bpo-39652.gbasrk.rst diff --git a/Doc/library/sqlite3.rst b/Doc/library/sqlite3.rst index 67ea2b1d776638..314d3a58e2759a 100644 --- a/Doc/library/sqlite3.rst +++ b/Doc/library/sqlite3.rst @@ -165,9 +165,10 @@ Module functions and constants that 'mytype' is the type of the column. It will try to find an entry of 'mytype' in the converters dictionary and then use the converter function found there to return the value. The column name found in :attr:`Cursor.description` - is only the first word of the column name, i. e. if you use something like - ``'as "x [datetime]"'`` in your SQL, then we will parse out everything until the - first blank for the column name: the column name would simply be "x". + does not include the type, i. e. if you use something like + ``'as "Expiration date [datetime]"'`` in your SQL, then we will parse out + everything until the first ``'['`` for the column name and strip + the preceeding space: the column name would simply be "Expiration date". .. function:: connect(database[, timeout, detect_types, isolation_level, check_same_thread, factory, cached_statements, uri]) diff --git a/Lib/sqlite3/test/regression.py b/Lib/sqlite3/test/regression.py index dd5aec50d1867c..ce97655c66be87 100644 --- a/Lib/sqlite3/test/regression.py +++ b/Lib/sqlite3/test/regression.py @@ -68,7 +68,7 @@ def CheckStatementReset(self): def CheckColumnNameWithSpaces(self): cur = self.con.cursor() cur.execute('select 1 as "foo bar [datetime]"') - self.assertEqual(cur.description[0][0], "foo bar") + self.assertEqual(cur.description[0][0], "foo bar [datetime]") cur.execute('select 1 as "foo baz"') self.assertEqual(cur.description[0][0], "foo baz") diff --git a/Lib/sqlite3/test/types.py b/Lib/sqlite3/test/types.py index 19ecd07500fec5..d26a9cb93f0888 100644 --- a/Lib/sqlite3/test/types.py +++ b/Lib/sqlite3/test/types.py @@ -275,13 +275,13 @@ def CheckNone(self): def CheckColName(self): self.cur.execute("insert into test(x) values (?)", ("xxx",)) - self.cur.execute('select x as "x [bar]" from test') + self.cur.execute('select x as "x y [bar]" from test') val = self.cur.fetchone()[0] self.assertEqual(val, "") # Check if the stripping of colnames works. Everything after the first - # whitespace should be stripped. - self.assertEqual(self.cur.description[0][0], "x") + # '[' (and the preceeding space) should be stripped. + self.assertEqual(self.cur.description[0][0], "x y") def CheckCaseInConverterName(self): self.cur.execute("select 'other' as \"x [b1b1]\"") diff --git a/Misc/NEWS.d/next/Library/2020-03-11-23-08-25.bpo-39652.gbasrk.rst b/Misc/NEWS.d/next/Library/2020-03-11-23-08-25.bpo-39652.gbasrk.rst new file mode 100644 index 00000000000000..9b75ae9df6cec0 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2020-03-11-23-08-25.bpo-39652.gbasrk.rst @@ -0,0 +1,2 @@ +The column name found in ``sqlite3.Cursor.description`` is now truncated on +the first '[' only if the PARSE_COLNAMES option is set. diff --git a/Modules/_sqlite/cursor.c b/Modules/_sqlite/cursor.c index 01b9dc44cb5da5..8cfa6e50e82225 100644 --- a/Modules/_sqlite/cursor.c +++ b/Modules/_sqlite/cursor.c @@ -193,22 +193,30 @@ pysqlite_build_row_cast_map(pysqlite_Cursor* self) } static PyObject * -_pysqlite_build_column_name(const char* colname) +_pysqlite_build_column_name(pysqlite_Cursor *self, const char *colname) { const char* pos; + Py_ssize_t len; if (!colname) { Py_RETURN_NONE; } - for (pos = colname;; pos++) { - if (*pos == 0 || *pos == '[') { - if ((*pos == '[') && (pos > colname) && (*(pos-1) == ' ')) { - pos--; + if (self->connection->detect_types & PARSE_COLNAMES) { + for (pos = colname; *pos; pos++) { + if (*pos == '[') { + if ((pos != colname) && (*(pos-1) == ' ')) { + pos--; + } + break; } - return PyUnicode_FromStringAndSize(colname, pos - colname); } + len = pos - colname; + } + else { + len = strlen(colname); } + return PyUnicode_FromStringAndSize(colname, len); } /* @@ -370,6 +378,7 @@ _pysqlite_query_execute(pysqlite_Cursor* self, int multiple, PyObject* args) PyObject* result; int numcols; PyObject* descriptor; + PyObject* column_name; PyObject* second_argument = NULL; sqlite_int64 lastrowid; @@ -546,7 +555,13 @@ _pysqlite_query_execute(pysqlite_Cursor* self, int multiple, PyObject* args) if (!descriptor) { goto error; } - PyTuple_SetItem(descriptor, 0, _pysqlite_build_column_name(sqlite3_column_name(self->statement->st, i))); + column_name = _pysqlite_build_column_name(self, + sqlite3_column_name(self->statement->st, i)); + if (!column_name) { + Py_DECREF(descriptor); + goto error; + } + PyTuple_SetItem(descriptor, 0, column_name); Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 1, Py_None); Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 2, Py_None); Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 3, Py_None);