- All Implemented Interfaces:
SqlTableRefis a node of a parse tree which represents a table reference.
It can be attached with a sql hint statement, see
SqlHint for details.
Methods inherited from class org.apache.calcite.sql.SqlCall
accept, clone, equalsDeep, findValidOptions, getCallSignature, getFunctionQuantifier, getKind, getMonotonicity, isCountStar, isExpanded, operand, operandCount, setOperand, validate
Methods inherited from class org.apache.calcite.sql.SqlNode
clone, clone, cloneArray, equalDeep, equalDeep, equalsDeep, getParserPosition, isA, toList, toList, toSqlString, toSqlString, toSqlString, toString, unparseWithParentheses, validateExpr
getOperatorpublic SqlOperator getOperator()
getOperandListDescription copied from class:
SqlCallReturns the list of operands. The set and order of operands is call-specific.
Note: the proper type would be
List<@Nullable SqlNode>, however, it would trigger too many changes to the current codebase.
unparsepublic void unparse
(SqlWriter writer, int leftPrec, int rightPrec)Description copied from class:
SqlNodeWrites a SQL representation of this node to a writer.
rightPrecparameters give us enough context to decide whether we need to enclose the expression in parentheses. For example, we need parentheses around "2 + 3" if preceded by "5 *". This is because the precedence of the "*" operator is greater than the precedence of the "+" operator.
The algorithm handles left- and right-associative operators by giving them slightly different left- and right-precedence.
SqlWriter.isAlwaysUseParentheses()is true, we use parentheses even when they are not required by the precedence rules.
For the details of this algorithm, see
SqlCall.unparse(org.apache.calcite.sql.SqlWriter, int, int).