Class SqlUpdate
- java.lang.Object
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- org.apache.calcite.sql.SqlNode
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- org.apache.calcite.sql.SqlCall
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- org.apache.calcite.sql.SqlUpdate
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- All Implemented Interfaces:
java.lang.Cloneable
public class SqlUpdate extends SqlCall
ASqlUpdate
is a node of a parse tree which represents an UPDATE statement.
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Field Summary
Fields Modifier and Type Field Description (package private) SqlIdentifier
alias
(package private) SqlNode
condition
static SqlSpecialOperator
OPERATOR
(package private) SqlNodeList
sourceExpressionList
(package private) SqlSelect
sourceSelect
(package private) SqlNodeList
targetColumnList
(package private) SqlNode
targetTable
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Fields inherited from class org.apache.calcite.sql.SqlNode
EMPTY_ARRAY, pos
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Constructor Summary
Constructors Constructor Description SqlUpdate(SqlParserPos pos, SqlNode targetTable, SqlNodeList targetColumnList, SqlNodeList sourceExpressionList, SqlNode condition, SqlSelect sourceSelect, SqlIdentifier alias)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description SqlIdentifier
getAlias()
SqlNode
getCondition()
Gets the filter condition for rows to be updated.SqlKind
getKind()
Returns the type of node this is, orSqlKind.OTHER
if it's nothing special.java.util.List<SqlNode>
getOperandList()
SqlOperator
getOperator()
SqlNodeList
getSourceExpressionList()
SqlSelect
getSourceSelect()
Gets the source SELECT expression for the data to be updated.SqlNodeList
getTargetColumnList()
SqlNode
getTargetTable()
void
setAlias(SqlIdentifier alias)
void
setOperand(int i, SqlNode operand)
Changes the value of an operand.void
setSourceSelect(SqlSelect sourceSelect)
void
unparse(SqlWriter writer, int leftPrec, int rightPrec)
Writes a SQL representation of this node to a writer.void
validate(SqlValidator validator, SqlValidatorScope scope)
Validates this call.-
Methods inherited from class org.apache.calcite.sql.SqlCall
accept, clone, equalsDeep, findValidOptions, getCallSignature, getFunctionQuantifier, getMonotonicity, isCountStar, isExpanded, operand, operandCount
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Methods inherited from class org.apache.calcite.sql.SqlNode
clone, clone, cloneArray, equalDeep, equalDeep, equalsDeep, getParserPosition, isA, toSqlString, toSqlString, toString, validateExpr
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Field Detail
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OPERATOR
public static final SqlSpecialOperator OPERATOR
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targetTable
SqlNode targetTable
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targetColumnList
SqlNodeList targetColumnList
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sourceExpressionList
SqlNodeList sourceExpressionList
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condition
SqlNode condition
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sourceSelect
SqlSelect sourceSelect
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alias
SqlIdentifier alias
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Constructor Detail
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SqlUpdate
public SqlUpdate(SqlParserPos pos, SqlNode targetTable, SqlNodeList targetColumnList, SqlNodeList sourceExpressionList, SqlNode condition, SqlSelect sourceSelect, SqlIdentifier alias)
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Method Detail
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getKind
public SqlKind getKind()
Description copied from class:SqlNode
Returns the type of node this is, orSqlKind.OTHER
if it's nothing special.- Overrides:
getKind
in classSqlCall
- Returns:
- a
SqlKind
value, never null - See Also:
SqlNode.isA(java.util.Set<org.apache.calcite.sql.SqlKind>)
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getOperator
public SqlOperator getOperator()
- Specified by:
getOperator
in classSqlCall
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getOperandList
public java.util.List<SqlNode> getOperandList()
- Specified by:
getOperandList
in classSqlCall
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setOperand
public void setOperand(int i, SqlNode operand)
Description copied from class:SqlCall
Changes the value of an operand. Allows some rewrite bySqlValidator
; use sparingly.- Overrides:
setOperand
in classSqlCall
- Parameters:
i
- Operand indexoperand
- Operand value
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getTargetTable
public SqlNode getTargetTable()
- Returns:
- the identifier for the target table of the update
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getAlias
public SqlIdentifier getAlias()
- Returns:
- the alias for the target table of the update
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setAlias
public void setAlias(SqlIdentifier alias)
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getTargetColumnList
public SqlNodeList getTargetColumnList()
- Returns:
- the list of target column names
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getSourceExpressionList
public SqlNodeList getSourceExpressionList()
- Returns:
- the list of source expressions
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getCondition
public SqlNode getCondition()
Gets the filter condition for rows to be updated.- Returns:
- the condition expression for the data to be updated, or null for all rows in the table
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getSourceSelect
public SqlSelect getSourceSelect()
Gets the source SELECT expression for the data to be updated. Returns null before the statement has been expanded bySqlValidatorImpl.performUnconditionalRewrites(SqlNode, boolean)
.- Returns:
- the source SELECT for the data to be updated
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setSourceSelect
public void setSourceSelect(SqlSelect sourceSelect)
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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
andrightPrec
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)
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validate
public void validate(SqlValidator validator, SqlValidatorScope scope)
Description copied from class:SqlCall
Validates this call.The default implementation delegates the validation to the operator's
SqlOperator.validateCall(org.apache.calcite.sql.SqlCall, org.apache.calcite.sql.validate.SqlValidator, org.apache.calcite.sql.validate.SqlValidatorScope, org.apache.calcite.sql.validate.SqlValidatorScope)
. Derived classes may override (as do, for exampleSqlSelect
andSqlUpdate
).
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