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typedef | rasqal_expression |
enum | rasqal_expression_flags |
rasqal_evaluation_context | |
enum | rasqal_op |
enum | rasqal_compare_flags |
enum | rasqal_pattern_flags |
Expressions form an expression tree that can be evaluated using
rasqal_expression_evaluate()
over rasqal_op operators, rasqal_literal
constants and rasqal_variable values bound in some
rasqal_query_result. The result is a rasqal_literal value.
rasqal_expression * rasqal_new_0op_expression (rasqal_world *world
,rasqal_op op
);
rasqal_expression * rasqal_new_1op_expression (rasqal_world *world
,rasqal_op op
,rasqal_expression *arg
);
rasqal_expression * rasqal_new_2op_expression (rasqal_world *world
,rasqal_op op
,rasqal_expression *arg1
,rasqal_expression *arg2
);
rasqal_expression * rasqal_new_3op_expression (rasqal_world *world
,rasqal_op op
,rasqal_expression *arg1
,rasqal_expression *arg2
,rasqal_expression *arg3
);
rasqal_expression * rasqal_new_4op_expression (rasqal_world *world
,rasqal_op op
,rasqal_expression *arg1
,rasqal_expression *arg2
,rasqal_expression *arg3
,rasqal_expression *arg4
);
rasqal_expression * rasqal_new_aggregate_function_expression (rasqal_world *world
,rasqal_op op
,rasqal_expression *arg1
,raptor_sequence *params
,unsigned int flags
);
rasqal_expression * rasqal_new_cast_expression (rasqal_world *world
,raptor_uri *name
,rasqal_expression *value
);
rasqal_expression * rasqal_new_function_expression (rasqal_world *world
,raptor_uri *name
,raptor_sequence *args
,raptor_sequence *params
,unsigned int flags
);
rasqal_expression * rasqal_new_group_concat_expression (rasqal_world *world
,unsigned int flags
,raptor_sequence *args
,rasqal_literal *separator
);
rasqal_expression * rasqal_new_literal_expression (rasqal_world *world
,rasqal_literal *literal
);
rasqal_expression * rasqal_new_set_expression (rasqal_world *world
,rasqal_op op
,rasqal_expression *arg1
,raptor_sequence *args
);
rasqal_expression * rasqal_new_string_op_expression (rasqal_world *world
,rasqal_op op
,rasqal_expression *arg1
,rasqal_literal *literal
);
rasqal_expression *
rasqal_new_expression_from_expression (rasqal_expression *e
);
rasqal_expression * rasqal_new_expr_seq_expression (rasqal_world *world
,rasqal_op op
,raptor_sequence *args
);
int rasqal_expression_compare (rasqal_expression *e1
,rasqal_expression *e2
,int flags
,int *error_p
);
rasqal_literal * rasqal_expression_evaluate (rasqal_world *world
,raptor_locator *locator
,rasqal_expression *e
,int flags
);
rasqal_expression_evaluate
is deprecated and should not be used in newly-written code.
rasqal_literal * rasqal_expression_evaluate2 (rasqal_expression *e
,rasqal_evaluation_context *eval_context
,int *error_p
);
int (*rasqal_expression_visit_fn) (void *user_data
,rasqal_expression *e
);
User function to visit an expression and operate on it with
rasqal_expression_visit()
int rasqal_expression_visit (rasqal_expression *e
,rasqal_expression_visit_fn fn
,void *user_data
);
rasqal_evaluation_context * rasqal_new_evaluation_context (rasqal_world *world
,raptor_locator *locator
,int flags
);
void
rasqal_free_evaluation_context (rasqal_evaluation_context *eval_context
);
int rasqal_evaluation_context_set_base_uri (rasqal_evaluation_context *eval_context
,raptor_uri *base_uri
);
int rasqal_evaluation_context_set_rand_seed (rasqal_evaluation_context *eval_context
,unsigned int seed
);
typedef struct { rasqal_world *world; raptor_uri* base_uri; raptor_locator *locator; int flags; unsigned int seed; rasqal_random* random; } rasqal_evaluation_context;
A context for evaluating an expression such as with
rasqal_expression_evaluate2()
rasqal_world * |
rasqal world |
|
raptor_uri * |
base URI of expression context (or NULL) |
|
raptor_locator * |
locator or NULL |
|
expression comparison flags |
||
random seeed |
||
random number generator object |
Rasqal expression operators. A mixture of unary, binary and tertiary operators (string matches). Also includes casting and two ordering operators from ORDER BY in SPARQL.
Internal |
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Expression for AND(A, B) |
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Expression for OR(A, B) |
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Expression for A equals B |
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Expression for A not equals B. |
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Expression for A less than B. |
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Expression for A greather than B. |
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Expression for A less than or equal to B. |
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Expression for A greater than or equal to B. |
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Expression for -A. |
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Expression for +A. |
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Expression for A-B. |
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Expression for A*B. |
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Expression for A/B. |
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Expression for A/B remainder. |
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Expression for A string equals B. |
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Expression for A string not-equals B. |
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Expression for string A matches literal regex B with flags. |
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Expression for string A not-matches literal regex B with flags. |
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Expression for binary not A. |
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Expression for logical not A. |
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Expression for a rasqal_literal. |
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Expression for a function A with arguments (B...). |
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Expression for SPARQL ISBOUND(A). |
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Expression for SPARQL STR(A). |
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Expression for SPARQL LANG(A). |
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Expression for SPARQL DATATYPE(A). |
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Expression for SPARQL ISURI(A). |
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Expression for SPARQL ISBLANK(A). |
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Expression for SPARQL ISLITERAL(A). |
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Expression for cast literal A to type B. |
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Expression for SPARQL order condition ascending. |
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Expression for SPARQL order condition descending. |
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Expression for SPARQL LANGMATCHES(A, B). |
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Expression for string A matches expression regex B with flags. |
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Obsolete - not used |
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Obsolete - not used |
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Expression for LAQRS select |
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Expression for LAQRS select Variable * |
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Expression for SPARQL sameTerm |
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Expression for LAQRS select |
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Expression for LAQRS select |
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Expression for LAQRS select |
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Expression for LAQRS select |
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Expression for LAQRS COALESCE(Expr+) |
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Expression for LAQRS IF(expr, expr, expr) |
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Expression for LAQRS URI(expr) |
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Expression for LAQRS IRI(expr) |
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Expression for LAQRS STRLANG(expr, expr) |
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Expression for LAQRS STRDT(expr, expr) |
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Expression for LAQRS |
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Expression for LAQRS GROUP_CONCAT(arglist) aggregate function |
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Expression for LAQRS SAMPLE(expr) aggregate function |
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Expression for LAQRS expr IN ( list of expr ) |
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Expression for LAQRS expr NOT IN ( list of expr ) |
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Expression for SPARQL 1.1 isNUMERIC(expr) |
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Expression for SPARQL 1.1 YEAR(datetime) |
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Expression for SPARQL 1.1 MONTH(datetime) |
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Expression for SPARQL 1.1 DAY(datetime) |
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Expression for SPARQL 1.1 HOURS(datetime) |
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Expression for SPARQL 1.1 MINUTES(datetime) |
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Expression for SPARQL 1.1 SECONDS(datetime) |
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Expression for SPARQL 1.1 TIMEZONE(datetime) |
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Expression for LAQRS CURRENT_DATETIME( void ) |
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Expression for LAQRS NOW( void ) |
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Expression for LAQRS FROM_UNIXTIME(int) |
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Expression for LAQRS TO_UNIXTIME(datetime) |
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Expression for SPARQL 1.1 CONCAT(strings) |
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Expression for SPARQL 1.1 STRLEN(str) |
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Expression for SPARQL 1.1 SUBSTR(str, start[,offset]) |
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Expression for SPARQL 1.1 UCASE(str) |
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Expression for SPARQL 1.1 LCASE(str) |
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Expression for SPARQL 1.1 STRSTARTS(str, str) |
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Expression for SPARQL 1.1 STRENDS(str, str) |
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Expression for SPARQL 1.1 CONTAINS(str, str) |
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Expression for SPARQL 1.1 ENCODE_FOR_URI(str) |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Expression for SPARQL 1.1 |
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Internal |
Flags for rasqal_expression_evaluate()
, rasqal_literal_compare()
or
rasqal_literal_as_string_flags()