org.apache.flink.table.planner.calcite

Class FlinkCalciteSqlValidator

java.lang.Object

org.apache.calcite.sql.validate.SqlValidatorImpl

org.apache.flink.table.planner.calcite.FlinkCalciteSqlValidator

All Implemented Interfaces:

org.apache.calcite.sql.validate.SqlValidator, org.apache.calcite.sql.validate.SqlValidatorWithHints

@Internal
public final class FlinkCalciteSqlValidator
extends SqlValidatorImpl

Extends Calcite's SqlValidator by Flink-specific behavior.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.calcite.sql.validate.SqlValidatorImpl

SqlValidatorImpl.DmlNamespace, SqlValidatorImpl.FunctionParamInfo, SqlValidatorImpl.IdInfo, SqlValidatorImpl.Status

Nested classes/interfaces inherited from interface org.apache.calcite.sql.validate.SqlValidator

org.apache.calcite.sql.validate.SqlValidator.Config

Field Summary

Fields inherited from class org.apache.calcite.sql.validate.SqlValidatorImpl

callToOperandTypesMap, functionCallStack, idPositions, namespaces, scopes, TRACER, typeFactory, unknownType, UPDATE_ANON_PREFIX, UPDATE_SRC_ALIAS, UPDATE_TGT_ALIAS

Constructor Summary

Constructors

Constructor and Description

FlinkCalciteSqlValidator(org.apache.calcite.sql.SqlOperatorTable opTab, org.apache.calcite.sql.validate.SqlValidatorCatalogReader catalogReader, org.apache.calcite.rel.type.RelDataTypeFactory typeFactory, org.apache.calcite.sql.validate.SqlValidator.Config config, org.apache.calcite.plan.RelOptTable.ToRelContext toRelcontext, org.apache.calcite.plan.RelOptCluster relOptCluster, org.apache.calcite.tools.FrameworkConfig frameworkConfig)

Method Summary

Modifier and Type	Method and Description
protected void	addToSelectList(List<org.apache.calcite.sql.SqlNode> list, Set<String> aliases, List<Map.Entry<String,org.apache.calcite.rel.type.RelDataType>> fieldList, org.apache.calcite.sql.SqlNode exp, org.apache.calcite.sql.validate.SelectScope scope, boolean includeSystemVars) Adds an expression to a select list, ensuring that its alias does not clash with any existing expressions on the list.
Optional<org.apache.calcite.rel.type.RelDataType>	getExpectedOutputType(org.apache.calcite.sql.SqlNode sqlNode)
protected @PolyNull org.apache.calcite.sql.SqlNode	performUnconditionalRewrites(@PolyNull org.apache.calcite.sql.SqlNode node, boolean underFrom) Performs expression rewrites which are always used unconditionally.
protected void	registerNamespace(@Nullable org.apache.calcite.sql.validate.SqlValidatorScope usingScope, @Nullable String alias, org.apache.calcite.sql.validate.SqlValidatorNamespace ns, boolean forceNullable) Registers a new namespace, and adds it as a child of its parent scope.
void	setExpectedOutputType(org.apache.calcite.sql.SqlNode sqlNode, org.apache.calcite.rel.type.RelDataType expectedOutputType)
void	validateColumnListParams(org.apache.calcite.sql.SqlFunction function, List<org.apache.calcite.rel.type.RelDataType> argTypes, List<org.apache.calcite.sql.SqlNode> operands)
protected void	validateJoin(org.apache.calcite.sql.SqlJoin join, org.apache.calcite.sql.validate.SqlValidatorScope scope)
void	validateLiteral(org.apache.calcite.sql.SqlLiteral literal)

Methods inherited from class org.apache.calcite.sql.validate.SqlValidatorImpl

checkTypeAssignment, config, createMatchRecognizeNameSpace, createPivotNameSpace, createSelectNamespace, createSetopNamespace, createSourceSelectForDelete, createSourceSelectForUpdate, createTargetRowType, createUnpivotNameSpace, declareCursor, deriveAlias, deriveConstructorType, deriveType, expand, expandGroupByOrHavingExpr, expandOrderExpr, expandSelectExpr, expandStar, getAggregate, getCatalogReader, getConformance, getCursorScope, getEmptyScope, getFieldOrigins, getFromScope, getGroupScope, getHavingScope, getJoinScope, getLogicalSourceRowType, getLogicalTargetRowType, getMatchRecognizeScope, getNamespace, getOperatorTable, getOrderScope, getOriginal, getOverScope, getParameterRowType, getParentCursor, getRawSelectScope, getSelectScope, getSelfJoinExprForUpdate, getTypeCoercion, getTypeFactory, getUnknownType, getValidatedNodeType, getValidatedNodeTypeIfKnown, getValidatedOperandTypes, getValidationErrorFunction, getWhereScope, getWindowByName, getWithScope, handleUnresolvedFunction, inferUnknownTypes, isAggregate, isAggregate, isNestedAggregateWindow, isOverAggregateWindow, isSystemField, lookupHints, lookupNameCompletionHints, lookupQualifiedName, makeNullaryCall, newValidationError, popFunctionCall, pushFunctionCall, removeValidatedNodeType, resolveWindow, setOriginal, setValidatedNodeType, shouldAllowIntermediateOrderBy, shouldAllowOverRelation, transform, usingNames, validate, validateAggregateParams, validateCall, validateDataType, validateDelete, validateDynamicParam, validateFeature, validateFrom, validateGroupClause, validateHavingClause, validateIdentifier, validateInsert, validateIntervalQualifier, validateMatchRecognize, validateMerge, validateModality, validateNamespace, validateOrderList, validateOver, validateParameterizedExpression, validatePivot, validateQuery, validateSelect, validateSelectList, validateSequenceValue, validateTableFunction, validateUnnest, validateUnpivot, validateUpdate, validateValues, validateWhereClause, validateWhereOrOn, validateWindow, validateWindowClause, validateWith, validateWithItem

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.calcite.sql.validate.SqlValidator

resolveWindow

Constructor Detail

FlinkCalciteSqlValidator

public FlinkCalciteSqlValidator(org.apache.calcite.sql.SqlOperatorTable opTab,
                                org.apache.calcite.sql.validate.SqlValidatorCatalogReader catalogReader,
                                org.apache.calcite.rel.type.RelDataTypeFactory typeFactory,
                                org.apache.calcite.sql.validate.SqlValidator.Config config,
                                org.apache.calcite.plan.RelOptTable.ToRelContext toRelcontext,
                                org.apache.calcite.plan.RelOptCluster relOptCluster,
                                org.apache.calcite.tools.FrameworkConfig frameworkConfig)

Method Detail

setExpectedOutputType

public void setExpectedOutputType(org.apache.calcite.sql.SqlNode sqlNode,
                                  org.apache.calcite.rel.type.RelDataType expectedOutputType)

getExpectedOutputType

public Optional<org.apache.calcite.rel.type.RelDataType> getExpectedOutputType(org.apache.calcite.sql.SqlNode sqlNode)

validateLiteral

public void validateLiteral(org.apache.calcite.sql.SqlLiteral literal)

Specified by:

validateLiteral in interface org.apache.calcite.sql.validate.SqlValidator

Overrides:

validateLiteral in class SqlValidatorImpl

validateJoin

protected void validateJoin(org.apache.calcite.sql.SqlJoin join,
                            org.apache.calcite.sql.validate.SqlValidatorScope scope)

Overrides:

validateJoin in class SqlValidatorImpl

validateColumnListParams

public void validateColumnListParams(org.apache.calcite.sql.SqlFunction function,
                                     List<org.apache.calcite.rel.type.RelDataType> argTypes,
                                     List<org.apache.calcite.sql.SqlNode> operands)

Specified by:

validateColumnListParams in interface org.apache.calcite.sql.validate.SqlValidator

Overrides:

validateColumnListParams in class SqlValidatorImpl

registerNamespace

protected void registerNamespace(@Nullable org.apache.calcite.sql.validate.SqlValidatorScope usingScope,
                                 @Nullable String alias,
                                 org.apache.calcite.sql.validate.SqlValidatorNamespace ns,
                                 boolean forceNullable)

Description copied from class: SqlValidatorImpl

Registers a new namespace, and adds it as a child of its parent scope. Derived class can override this method to tinker with namespaces as they are created.

Overrides:

registerNamespace in class SqlValidatorImpl

Parameters:

usingScope - Parent scope (which will want to look for things in this namespace)

alias - Alias by which parent will refer to this namespace

ns - Namespace

forceNullable - Whether to force the type of namespace to be nullable

addToSelectList

protected void addToSelectList(List<org.apache.calcite.sql.SqlNode> list,
                               Set<String> aliases,
                               List<Map.Entry<String,org.apache.calcite.rel.type.RelDataType>> fieldList,
                               org.apache.calcite.sql.SqlNode exp,
                               org.apache.calcite.sql.validate.SelectScope scope,
                               boolean includeSystemVars)

Description copied from class: SqlValidatorImpl

Adds an expression to a select list, ensuring that its alias does not clash with any existing expressions on the list.

Overrides:

addToSelectList in class SqlValidatorImpl

performUnconditionalRewrites

protected @PolyNull org.apache.calcite.sql.SqlNode performUnconditionalRewrites(@PolyNull org.apache.calcite.sql.SqlNode node,
                                                                                boolean underFrom)

Description copied from class: SqlValidatorImpl

Performs expression rewrites which are always used unconditionally. These rewrites massage the expression tree into a standard form so that the rest of the validation logic can be simpler.

Returns null if and only if the original expression is null.

Overrides:

performUnconditionalRewrites in class SqlValidatorImpl

Parameters:

node - expression to be rewritten

underFrom - whether node appears directly under a FROM clause

Returns:

rewritten expression, or null if the original expression is null