def __get_valid_condition(self, column_metadata: ColumnMetadata,
validity: Validity, dialect: Dialect):
qualified_column_name = dialect.qualify_column_name(
column_metadata.name, column_metadata.data_type)
if validity is None:
return '', True
validity_clauses = []
if validity.format is not None and self.is_text:
format_regex = Validity.FORMATS.get(validity.format)
qualified_regex = dialect.qualify_regex(format_regex)
validity_clauses.append(
dialect.sql_expr_regexp_like(qualified_column_name,
qualified_regex))
if validity.regex is not None and self.is_text:
qualified_regex = dialect.qualify_regex(validity.regex)
validity_clauses.append(
dialect.sql_expr_regexp_like(qualified_column_name,
qualified_regex))
if validity.values is not None:
valid_values_sql = dialect.sql_expr_list(column_metadata,
validity.values)
validity_clauses.append(
dialect.sql_expr_in(qualified_column_name, valid_values_sql))
if validity.min_length is not None and self.is_text:
validity_clauses.append(
f'{dialect.sql_expr_length(qualified_column_name)} >= {validity.min_length}'
)
if validity.max_length is not None and self.is_text:
validity_clauses.append(
f'{dialect.sql_expr_length(qualified_column_name)} <= {validity.max_length}'
)
if validity.min is not None and self.is_number:
validity_clauses.append(
f'{qualified_column_name} >= {validity.min}')
if validity.max is not None and self.is_number:
validity_clauses.append(
f'{qualified_column_name} <= {validity.max}')
if validity.min is not None and self.is_text:
validity_clauses.append(
f'{dialect.sql_expr_cast_text_to_number(qualified_column_name, self.validity_format)} >= {validity.min}'
)
if validity.max is not None and self.is_text:
validity_clauses.append(
f'{dialect.sql_expr_cast_text_to_number(qualified_column_name, self.validity_format)} <= {validity.max}'
)
if len(validity_clauses) != 0:
return '(' + ' AND '.join(validity_clauses) + ')', len(
validity_clauses) == 0
else:
return '', True
def __get_missing_condition(cls, column_metadata: ColumnMetadata, missing: Missing, dialect: Dialect):
qualified_column_name = dialect.qualify_column_name(column_metadata.name)
validity_clauses = [f'{qualified_column_name} IS NULL']
if missing:
if missing.values:
sql_expr_missing_values = dialect.sql_expr_list(column_metadata, missing.values)
validity_clauses.append(f'{qualified_column_name} IN {sql_expr_missing_values}')
if missing.format:
format_regex = Missing.FORMATS.get(missing.format)
qualified_regex = dialect.qualify_regex(format_regex)
validity_clauses.append(dialect.sql_expr_regexp_like(qualified_column_name, qualified_regex))
if missing.regex:
qualified_regex = dialect.qualify_regex(missing.regex)
validity_clauses.append(dialect.sql_expr_regexp_like(qualified_column_name, qualified_regex))
return " OR ".join(validity_clauses), len(validity_clauses) == 1