A string literal. More...
#include <qExpr.h>
Inheritance diagram for ibis::math::literal:
Public Member Functions | |
| virtual literal * | dup () const |
| Make a duplicate copy of the term. | |
| virtual double | eval () const |
| Evaluate the term. | |
| virtual bool | isConstant () const |
| Is this expression a constant? A constant remains the same not matter which row it is applied to. More... | |
| virtual bool | isTrue () const |
| Should the string literal be interpreted as true? A string literal is interpretted as true if it starts with letter 't' or 'T', or it equals to "1". More... | |
| literal (const char *s) | |
| virtual uint32_t | nItems () const |
| Count the number of items in the query expression. | |
| operator const char * () const | |
| virtual void | print (std::ostream &out) const |
| Print a human readable version of the expression. | |
| virtual void | printFull (std::ostream &out) const |
| Same as print. | |
| virtual TERM_TYPE | termType () const |
 Public Member Functions inherited from ibis::math::term | |
| virtual term * | reduce () |
| Shorten the expression by evaluating the constants. More... | |
| Public Member Functions inherited from ibis::qExpr | |
| bool | directEval () const |
| Can the expression be directly evaluated? | |
| void | extractDeprecatedJoins (std::vector< const deprecatedJoin * > &) const |
| Extract conjunctive terms of the deprecated joins. | |
| qRange * | findRange (const char *vname) |
| Find the first range condition involving the named variable. | |
| void | getConjunctiveTerms (termTableList &) const |
| Extract the top-level conjunctive terms. More... | |
| qExpr *& | getLeft () |
| Return a pointer to the left child. More... | |
| const qExpr * | getLeft () const |
| Return a const pointer to the left child. | |
| qExpr *& | getRight () |
| Return a pointer to the right child. More... | |
| const qExpr * | getRight () const |
| Return a const pointer to the right child. | |
| virtual void | getTableNames (std::set< std::string > &plist) const |
| Identify the data partitions involved in the query expression. More... | |
| TYPE | getType () const |
| Return the node type. | |
| virtual bool | isSimple () const |
| Is the expression simple? A simple expression contains only range conditions connected with logical operators. More... | |
| bool | isTerminal () const |
| Is this expression a terminal node of an expression tree? | |
| qExpr & | operator= (const qExpr &rhs) |
| Assignment operator. | |
| qExpr () | |
| Default constructor. It generates a node of undefined type. | |
| qExpr (TYPE op) | |
| Construct a node of specified type. Not for implicit type conversion. | |
| qExpr (TYPE op, qExpr *qe1, qExpr *qe2) | |
| Construct a full specified node. More... | |
| qExpr (const qExpr &qe) | |
| Copy Constructor. Deep copy. | |
| double | reorder (const weight &) |
| After reordering, the lightest weight is one the left side of a group of commutable operators. More... | |
| int | separateSimple (ibis::qExpr *&simple, ibis::qExpr *&tail) const |
| Separate an expression tree into two connected with an AND operator. More... | |
| void | setLeft (qExpr *expr) |
| Change the left child. More... | |
| void | setRight (qExpr *expr) |
| Change the right child. More... | |
| void | swap (qExpr &rhs) |
| Swap the content. No exception expected. | |
| virtual | ~qExpr () |
| Destructor. More... | |
Additional Inherited Members | |
| Public Types inherited from ibis::qExpr | |
| enum | COMPARE { OP_UNDEFINED, OP_LT, OP_GT, OP_LE, OP_GE, OP_EQ } |
| Comparison operator supported in RANGE. | |
| typedef std::vector< TTN > | termTableList |
| enum | TYPE { LOGICAL_UNDEFINED, LOGICAL_NOT, LOGICAL_AND, LOGICAL_OR, LOGICAL_XOR, LOGICAL_MINUS, RANGE, DRANGE, STRING, ANYSTRING, KEYWORD, ALLWORDS, COMPRANGE, MATHTERM, DEPRECATEDJOIN, TOPK, EXISTS, ANYANY, LIKE, INTHOD, UINTHOD } |
| Definition of node types. More... | |
| Static Public Member Functions inherited from ibis::qExpr | |
| static std::string | extractTableName (const char *) |
| Extract the data partition name from the column name cn. More... | |
| static void | simplify (ibis::qExpr *&) |
| Attempt to simplify the query expressions. More... | |
| static void | splitColumnName (const char *, std::string &, std::string &) |
| Split the incoming name into data partition name and column name. More... | |
| Protected Member Functions inherited from ibis::math::term | |
| term (const term &rhs) | |
| Protected Member Functions inherited from ibis::qExpr | |
| void | adjust () |
| Adjust the tree to favor the sequential evaluation order. More... | |
| Protected Attributes inherited from ibis::qExpr | |
| qExpr * | left |
| The left child. | |
| qExpr * | right |
| The right child. | |
| TYPE | type |
| The type of node. More... | |
Detailed Description
A string literal.
Member Function Documentation
|
inlinevirtual |
Is this expression a constant? A constant remains the same not matter which row it is applied to.
Reimplemented from ibis::qExpr.
|
inlinevirtual |
Should the string literal be interpreted as true? A string literal is interpretted as true if it starts with letter 't' or 'T', or it equals to "1".
Reimplemented from ibis::math::term.
The documentation for this class was generated from the following file:
