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postgre.py
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postgre.py
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from ..adapters.postgres import Postgre, PostgreNew, PostgreBoolean
from ..helpers.methods import varquote_aux
from ..objects import Expression
from .base import SQLDialect
from . import dialects, sqltype_for, register_expression
@dialects.register_for(Postgre)
class PostgreDialect(SQLDialect):
true_exp = "TRUE"
false_exp = "FALSE"
@sqltype_for('blob')
def type_blob(self):
return 'BYTEA'
@sqltype_for('bigint')
def type_bigint(self):
return 'BIGINT'
@sqltype_for('double')
def type_double(self):
return 'FLOAT8'
@sqltype_for('id')
def type_id(self):
return 'SERIAL PRIMARY KEY'
@sqltype_for('big-id')
def type_big_id(self):
return 'BIGSERIAL PRIMARY KEY'
@sqltype_for('big-reference')
def type_big_reference(self):
return 'BIGINT REFERENCES %(foreign_key)s ' + \
'ON DELETE %(on_delete_action)s %(null)s %(unique)s'
@sqltype_for('reference TFK')
def type_reference_tfk(self):
return ' CONSTRAINT "FK_%(constraint_name)s_PK" FOREIGN KEY ' + \
'(%(field_name)s) REFERENCES %(foreign_table)s' + \
'(%(foreign_key)s) ON DELETE %(on_delete_action)s'
@sqltype_for('geometry')
def type_geometry(self):
return 'GEOMETRY'
@sqltype_for('geography')
def type_geography(self):
return 'GEOGRAPHY'
def varquote(self, val):
return varquote_aux(val, '"%s"')
def sequence_name(self, tablename):
return self.quote('%s_id_seq' % tablename)
def insert(self, table, fields, values, returning=None):
ret = ''
if returning:
ret = 'RETURNING %s' % returning
return 'INSERT INTO %s(%s) VALUES (%s)%s;' % (
table, fields, values, ret)
@property
def random(self):
return 'RANDOM()'
def add(self, first, second, query_env={}):
t = first.type
if t in ('text', 'string', 'password', 'json', 'jsonb', 'upload', 'blob'):
return '(%s || %s)' % (
self.expand(first, query_env=query_env),
self.expand(second, first.type, query_env=query_env))
else:
return '(%s + %s)' % (
self.expand(first, query_env=query_env),
self.expand(second, first.type, query_env=query_env))
def regexp(self, first, second, query_env={}):
return '(%s ~ %s)' % (
self.expand(first, query_env=query_env),
self.expand(second, 'string', query_env=query_env))
def like(self, first, second, escape=None, query_env={}):
if isinstance(second, Expression):
second = self.expand(second, 'string', query_env=query_env)
else:
second = self.expand(second, 'string', query_env=query_env)
if escape is None:
escape = '\\'
second = second.replace(escape, escape * 2)
if first.type not in ('string', 'text', 'json', 'jsonb'):
return "(%s LIKE %s ESCAPE '%s')" % (
self.cast(self.expand(first, query_env=query_env),
'CHAR(%s)' % first.length), second, escape)
return "(%s LIKE %s ESCAPE '%s')" % (
self.expand(first, query_env=query_env), second, escape)
def ilike(self, first, second, escape=None, query_env={}):
if isinstance(second, Expression):
second = self.expand(second, 'string', query_env=query_env)
else:
second = self.expand(second, 'string', query_env=query_env)
if escape is None:
escape = '\\'
second = second.replace(escape, escape * 2)
if first.type not in ('string', 'text', 'json', 'jsonb', 'list:string'):
return "(%s ILIKE %s ESCAPE '%s')" % (
self.cast(self.expand(first, query_env=query_env),
'CHAR(%s)' % first.length), second, escape)
return "(%s ILIKE %s ESCAPE '%s')" % (
self.expand(first, query_env=query_env), second, escape)
def drop_table(self, table, mode):
if mode not in ['restrict', 'cascade', '']:
raise ValueError('Invalid mode: %s' % mode)
return ['DROP TABLE ' + table._rname + ' ' + mode + ';']
def create_index(self, name, table, expressions, unique=False, where=None):
uniq = ' UNIQUE' if unique else ''
whr = ''
if where:
whr = ' %s' % self.where(where)
with self.adapter.index_expander():
rv = 'CREATE%s INDEX %s ON %s (%s)%s;' % (
uniq, self.quote(name), table._rname, ','.join(
self.expand(field) for field in expressions), whr)
return rv
def st_asgeojson(self, first, second, query_env={}):
return 'ST_AsGeoJSON(%s,%s,%s,%s)' % (
second['version'], self.expand(first, query_env=query_env),
second['precision'], second['options'])
def st_astext(self, first, query_env={}):
return 'ST_AsText(%s)' % self.expand(first, query_env=query_env)
def st_x(self, first, query_env={}):
return 'ST_X(%s)' % (self.expand(first, query_env=query_env))
def st_y(self, first, query_env={}):
return 'ST_Y(%s)' % (self.expand(first, query_env=query_env))
def st_contains(self, first, second, query_env={}):
return 'ST_Contains(%s,%s)' % (
self.expand(first, query_env=query_env),
self.expand(second, first.type, query_env=query_env))
def st_distance(self, first, second, query_env={}):
return 'ST_Distance(%s,%s)' % (
self.expand(first, query_env=query_env),
self.expand(second, first.type, query_env=query_env))
def st_equals(self, first, second, query_env={}):
return 'ST_Equals(%s,%s)' % (
self.expand(first, query_env=query_env),
self.expand(second, first.type, query_env=query_env))
def st_intersects(self, first, second, query_env={}):
return 'ST_Intersects(%s,%s)' % (
self.expand(first, query_env=query_env),
self.expand(second, first.type, query_env=query_env))
def st_overlaps(self, first, second, query_env={}):
return 'ST_Overlaps(%s,%s)' % (
self.expand(first, query_env=query_env),
self.expand(second, first.type, query_env=query_env))
def st_simplify(self, first, second, query_env={}):
return 'ST_Simplify(%s,%s)' % (
self.expand(first, query_env=query_env),
self.expand(second, 'double', query_env=query_env))
def st_simplifypreservetopology(self, first, second, query_env={}):
return 'ST_SimplifyPreserveTopology(%s,%s)' % (
self.expand(first, query_env=query_env),
self.expand(second, 'double', query_env=query_env))
def st_touches(self, first, second, query_env={}):
return 'ST_Touches(%s,%s)' % (
self.expand(first, query_env=query_env),
self.expand(second, first.type, query_env=query_env))
def st_within(self, first, second, query_env={}):
return 'ST_Within(%s,%s)' % (
self.expand(first, query_env=query_env),
self.expand(second, first.type, query_env=query_env))
def st_dwithin(self, first, tup, query_env={}):
return 'ST_DWithin(%s,%s,%s)' % (
self.expand(first, query_env=query_env),
self.expand(tup[0], first.type, query_env=query_env),
self.expand(tup[1], 'double', query_env=query_env))
@register_expression('doy')
def extract_doy(self, expr):
return Expression(expr.db, self.extract, expr, 'doy', 'integer')
@register_expression('dow')
def extract_dow(self, expr):
return Expression(expr.db, self.extract, expr, 'dow', 'integer')
@register_expression('isodow')
def extract_isodow(self, expr):
return Expression(expr.db, self.extract, expr, 'isodow', 'integer')
@register_expression('isoyear')
def extract_isoyear(self, expr):
return Expression(expr.db, self.extract, expr, 'isoyear', 'integer')
@register_expression('quarter')
def extract_quarter(self, expr):
return Expression(expr.db, self.extract, expr, 'quarter', 'integer')
@register_expression('week')
def extract_week(self, expr):
return Expression(expr.db, self.extract, expr, 'week', 'integer')
@register_expression('decade')
def extract_decade(self, expr):
return Expression(expr.db, self.extract, expr, 'decade', 'integer')
@register_expression('century')
def extract_century(self, expr):
return Expression(expr.db, self.extract, expr, 'century', 'integer')
@register_expression('millenium')
def extract_millenium(self, expr):
return Expression(expr.db, self.extract, expr, 'millenium', 'integer')
class PostgreDialectJSON(PostgreDialect):
@sqltype_for('json')
def type_json(self):
return 'JSON'
@sqltype_for('jsonb')
def type_jsonb(self):
return 'JSONB'
@dialects.register_for(PostgreNew)
class PostgreDialectArrays(PostgreDialect):
@sqltype_for('list:integer')
def type_list_integer(self):
return 'BIGINT[]'
@sqltype_for('list:string')
def type_list_string(self):
return 'TEXT[]'
@sqltype_for('list:reference')
def type_list_reference(self):
return 'BIGINT[]'
def any(self, val, query_env={}):
return "ANY(%s)" % self.expand(val, query_env=query_env)
def contains(self, first, second, case_sensitive=True, query_env={}):
if first.type.startswith('list:'):
f = self.expand(second, 'string', query_env=query_env)
s = self.any(first, query_env)
if case_sensitive is True:
return self.eq(f, s)
return self.ilike(f, s, escape='\\', query_env=query_env)
return super(PostgreDialectArrays, self).contains(
first, second, case_sensitive=case_sensitive, query_env=query_env)
def ilike(self, first, second, escape=None, query_env={}):
if first and 'type' not in first:
args = (first, self.expand(second, query_env=query_env))
return '(%s ILIKE %s)' % args
return super(PostgreDialectArrays, self).ilike(
first, second, escape=escape, query_env=query_env)
def eq(self, first, second=None, query_env={}):
if first and 'type' not in first:
return '(%s = %s)' % (first,
self.expand(second, query_env=query_env))
return super(PostgreDialectArrays, self).eq(first, second, query_env)
class PostgreDialectArraysJSON(PostgreDialectArrays):
@sqltype_for('json')
def type_json(self):
return 'JSON'
@sqltype_for('jsonb')
def type_jsonb(self):
return 'JSONB'
@dialects.register_for(PostgreBoolean)
class PostgreDialectBoolean(PostgreDialectArrays):
@sqltype_for('boolean')
def type_boolean(self):
return 'BOOLEAN'
class PostgreDialectBooleanJSON(PostgreDialectBoolean):
@sqltype_for('json')
def type_json(self):
return 'JSON'
@sqltype_for('jsonb')
def type_jsonb(self):
return 'JSONB'