`gws.lib.cql.parser`¶

CQL2-Text parser.

Source code: gws.lib.cql.parser

Module Contents¶

class gws.lib.cql.parser.C¶

Operator, keyword and function sets of the parser.

ADDITIVE_OPERATORS¶: Additive operators, also used as unary signs.

ARRAY_FUNCTIONS¶: Functions whose parenthesized arguments are array literals.

COMPARISON_OPERATORS¶: Comparison operators.

FUNCTIONS¶: Standard functions and their number of arguments.

KEYWORDS¶: Reserved keywords.

LITERALS¶: Literal node types.

MULTIPLICATIVE_OPERATORS¶: Multiplicative operators.

NOT_EQUAL_OPERATORS¶: Not-equal operators, emitted as <>.

OPERATORS¶: All operators.

PATTERN_FUNCTIONS¶: Functions allowed as a LIKE pattern.

POWER_OPERATORS¶: Power operators.

PREDICATE_KEYWORDS¶: Keywords that can follow an operand in a predicate.

WKT_KEYWORDS¶: Geometry types that start a WKT literal.

class gws.lib.cql.parser.Node¶

Node types of the parse tree.

AND = 'AND'¶

ARRAY = 'ARRAY'¶

BETWEEN = 'BETWEEN'¶

BOOL = 'BOOL'¶

DATE = 'DATE'¶

FLOAT = 'FLOAT'¶

FUNCTION = 'FUNCTION'¶

IN = 'IN'¶

INT = 'INT'¶

IS_NULL = 'IS_NULL'¶

LIKE = 'LIKE'¶

NAME = 'NAME'¶

NOT = 'NOT'¶

NOT_BETWEEN = 'NOT_BETWEEN'¶

NOT_IN = 'NOT_IN'¶

NOT_LIKE = 'NOT_LIKE'¶

NOT_NULL = 'NOT_NULL'¶

OR = 'OR'¶

STRING = 'STRING'¶

TIMESTAMP = 'TIMESTAMP'¶

USER_FUNCTION = 'USER_FUNCTION'¶

WKT = 'WKT'¶

gws.lib.cql.parser.parse(s: str)¶

Parse a CQL2-Text expression.

Parameters:: s – CQL2-Text expression.
Returns:: A parse tree of nested lists, see the package documentation.
Raises:: ParseError – If the expression is invalid.

exception gws.lib.cql.parser.ParseError¶

Bases: Exception

A CQL2-Text expression is invalid. The message contains the error position.