Package org.apache.calcite.sql.ddl

Class SqlColumnDeclaration

java.lang.Object

org.apache.calcite.sql.SqlNode

org.apache.calcite.sql.SqlCall

org.apache.calcite.sql.ddl.SqlColumnDeclaration

All Implemented Interfaces:

java.lang.Cloneable

public class SqlColumnDeclaration
extends SqlCall

Parse tree for UNIQUE, PRIMARY KEY constraints.

And FOREIGN KEY, when we support it.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) SqlDataTypeSpec	dataType
(package private) SqlNode	expression
(package private) SqlIdentifier	name
private static SqlSpecialOperator	OPERATOR
(package private) ColumnStrategy	strategy

Fields inherited from class org.apache.calcite.sql.SqlNode

EMPTY_ARRAY, pos

Constructor Summary

Constructors

Constructor	Description
SqlColumnDeclaration(SqlParserPos pos, SqlIdentifier name, SqlDataTypeSpec dataType, SqlNode expression, ColumnStrategy strategy)	Creates a SqlColumnDeclaration; use SqlDdlNodes.column(org.apache.calcite.sql.parser.SqlParserPos, org.apache.calcite.sql.SqlIdentifier, org.apache.calcite.sql.SqlDataTypeSpec, org.apache.calcite.sql.SqlNode, org.apache.calcite.schema.ColumnStrategy).

Method Summary

Modifier and Type	Method	Description
private void	exp(SqlWriter writer)
java.util.List<SqlNode>	getOperandList()
SqlOperator	getOperator()
void	unparse(SqlWriter writer, int leftPrec, int rightPrec)	Writes a SQL representation of this node to a writer.

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, toSqlString, toSqlString, toString, validateExpr

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

OPERATOR

private static final SqlSpecialOperator OPERATOR

name

final SqlIdentifier name

dataType

final SqlDataTypeSpec dataType

expression

final SqlNode expression

strategy

final ColumnStrategy strategy

Constructor Detail

SqlColumnDeclaration

SqlColumnDeclaration(SqlParserPos pos,
                     SqlIdentifier name,
                     SqlDataTypeSpec dataType,
                     SqlNode expression,
                     ColumnStrategy strategy)

Creates a SqlColumnDeclaration; use SqlDdlNodes.column(org.apache.calcite.sql.parser.SqlParserPos, org.apache.calcite.sql.SqlIdentifier, org.apache.calcite.sql.SqlDataTypeSpec, org.apache.calcite.sql.SqlNode, org.apache.calcite.schema.ColumnStrategy).

Method Detail

getOperator

public SqlOperator getOperator()

Specified by:

getOperator in class SqlCall

getOperandList

public java.util.List<SqlNode> getOperandList()

Specified by:

getOperandList in class SqlCall

unparse

public void unparse(SqlWriter writer,
                    int leftPrec,
                    int rightPrec)

Description copied from class: SqlNode

Writes a SQL representation of this node to a writer.

The leftPrec and rightPrec parameters 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.

If 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).

Overrides:

unparse in class SqlCall

Parameters:

writer - Target writer

leftPrec - The precedence of the SqlNode immediately preceding this node in a depth-first scan of the parse tree

rightPrec - The precedence of the SqlNode immediately

exp

private void exp(SqlWriter writer)