diff options
Diffstat (limited to 'lib/python2.7/site-packages/django/db/backends/mysql/introspection.py')
-rw-r--r-- | lib/python2.7/site-packages/django/db/backends/mysql/introspection.py | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/lib/python2.7/site-packages/django/db/backends/mysql/introspection.py b/lib/python2.7/site-packages/django/db/backends/mysql/introspection.py deleted file mode 100644 index 548877e..0000000 --- a/lib/python2.7/site-packages/django/db/backends/mysql/introspection.py +++ /dev/null @@ -1,119 +0,0 @@ -import re -from .base import FIELD_TYPE - -from django.db.backends import BaseDatabaseIntrospection, FieldInfo -from django.utils.encoding import force_text - - -foreign_key_re = re.compile(r"\sCONSTRAINT `[^`]*` FOREIGN KEY \(`([^`]*)`\) REFERENCES `([^`]*)` \(`([^`]*)`\)") - -class DatabaseIntrospection(BaseDatabaseIntrospection): - data_types_reverse = { - FIELD_TYPE.BLOB: 'TextField', - FIELD_TYPE.CHAR: 'CharField', - FIELD_TYPE.DECIMAL: 'DecimalField', - FIELD_TYPE.NEWDECIMAL: 'DecimalField', - FIELD_TYPE.DATE: 'DateField', - FIELD_TYPE.DATETIME: 'DateTimeField', - FIELD_TYPE.DOUBLE: 'FloatField', - FIELD_TYPE.FLOAT: 'FloatField', - FIELD_TYPE.INT24: 'IntegerField', - FIELD_TYPE.LONG: 'IntegerField', - FIELD_TYPE.LONGLONG: 'BigIntegerField', - FIELD_TYPE.SHORT: 'IntegerField', - FIELD_TYPE.STRING: 'CharField', - FIELD_TYPE.TIME: 'TimeField', - FIELD_TYPE.TIMESTAMP: 'DateTimeField', - FIELD_TYPE.TINY: 'IntegerField', - FIELD_TYPE.TINY_BLOB: 'TextField', - FIELD_TYPE.MEDIUM_BLOB: 'TextField', - FIELD_TYPE.LONG_BLOB: 'TextField', - FIELD_TYPE.VAR_STRING: 'CharField', - } - - def get_table_list(self, cursor): - "Returns a list of table names in the current database." - cursor.execute("SHOW TABLES") - return [row[0] for row in cursor.fetchall()] - - def get_table_description(self, cursor, table_name): - """ - Returns a description of the table, with the DB-API cursor.description interface." - """ - # varchar length returned by cursor.description is an internal length, - # not visible length (#5725), use information_schema database to fix this - cursor.execute(""" - SELECT column_name, character_maximum_length FROM information_schema.columns - WHERE table_name = %s AND table_schema = DATABASE() - AND character_maximum_length IS NOT NULL""", [table_name]) - length_map = dict(cursor.fetchall()) - - # Also getting precision and scale from information_schema (see #5014) - cursor.execute(""" - SELECT column_name, numeric_precision, numeric_scale FROM information_schema.columns - WHERE table_name = %s AND table_schema = DATABASE() - AND data_type='decimal'""", [table_name]) - numeric_map = dict([(line[0], tuple([int(n) for n in line[1:]])) for line in cursor.fetchall()]) - - cursor.execute("SELECT * FROM %s LIMIT 1" % self.connection.ops.quote_name(table_name)) - return [FieldInfo(*((force_text(line[0]),) - + line[1:3] - + (length_map.get(line[0], line[3]),) - + numeric_map.get(line[0], line[4:6]) - + (line[6],))) - for line in cursor.description] - - def _name_to_index(self, cursor, table_name): - """ - Returns a dictionary of {field_name: field_index} for the given table. - Indexes are 0-based. - """ - return dict([(d[0], i) for i, d in enumerate(self.get_table_description(cursor, table_name))]) - - def get_relations(self, cursor, table_name): - """ - Returns a dictionary of {field_index: (field_index_other_table, other_table)} - representing all relationships to the given table. Indexes are 0-based. - """ - my_field_dict = self._name_to_index(cursor, table_name) - constraints = self.get_key_columns(cursor, table_name) - relations = {} - for my_fieldname, other_table, other_field in constraints: - other_field_index = self._name_to_index(cursor, other_table)[other_field] - my_field_index = my_field_dict[my_fieldname] - relations[my_field_index] = (other_field_index, other_table) - return relations - - def get_key_columns(self, cursor, table_name): - """ - Returns a list of (column_name, referenced_table_name, referenced_column_name) for all - key columns in given table. - """ - key_columns = [] - cursor.execute(""" - SELECT column_name, referenced_table_name, referenced_column_name - FROM information_schema.key_column_usage - WHERE table_name = %s - AND table_schema = DATABASE() - AND referenced_table_name IS NOT NULL - AND referenced_column_name IS NOT NULL""", [table_name]) - key_columns.extend(cursor.fetchall()) - return key_columns - - def get_indexes(self, cursor, table_name): - cursor.execute("SHOW INDEX FROM %s" % self.connection.ops.quote_name(table_name)) - # Do a two-pass search for indexes: on first pass check which indexes - # are multicolumn, on second pass check which single-column indexes - # are present. - rows = list(cursor.fetchall()) - multicol_indexes = set() - for row in rows: - if row[3] > 1: - multicol_indexes.add(row[2]) - indexes = {} - for row in rows: - if row[2] in multicol_indexes: - continue - indexes[row[4]] = {'primary_key': (row[2] == 'PRIMARY'), 'unique': not bool(row[1])} - return indexes - |