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%{
// Copyright 2020 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package parser
import (
"math"
"strconv"
"github.com/hanchuanchuan/goInception/ast"
"github.com/hanchuanchuan/goInception/model"
)
%}
%union {
ident string
number uint64
hint *ast.TableOptimizerHint
hints []*ast.TableOptimizerHint
table ast.HintTable
}
%token <number>
/*yy:token "%d" */
hintIntLit "a 64-bit unsigned integer"
%token <ident>
/*yy:token "%c" */
hintIdentifier
/*yy:token "@%c" */
hintSingleAtIdentifier "identifier with single leading at"
/*yy:token "'%c'" */
hintStringLit
/* MySQL 8.0 hint names */
hintJoinFixedOrder "JOIN_FIXED_ORDER"
hintJoinOrder "JOIN_ORDER"
hintJoinPrefix "JOIN_PREFIX"
hintJoinSuffix "JOIN_SUFFIX"
hintBKA "BKA"
hintNoBKA "NO_BKA"
hintBNL "BNL"
hintNoBNL "NO_BNL"
hintHashJoin "HASH_JOIN"
hintNoHashJoin "NO_HASH_JOIN"
hintMerge "MERGE"
hintNoMerge "NO_MERGE"
hintIndexMerge "INDEX_MERGE"
hintNoIndexMerge "NO_INDEX_MERGE"
hintMRR "MRR"
hintNoMRR "NO_MRR"
hintNoICP "NO_ICP"
hintNoRangeOptimization "NO_RANGE_OPTIMIZATION"
hintSkipScan "SKIP_SCAN"
hintNoSkipScan "NO_SKIP_SCAN"
hintSemijoin "SEMIJOIN"
hintNoSemijoin "NO_SEMIJOIN"
hintMaxExecutionTime "MAX_EXECUTION_TIME"
hintSetVar "SET_VAR"
hintResourceGroup "RESOURCE_GROUP"
hintQBName "QB_NAME"
/* TiDB hint names */
hintAggToCop "AGG_TO_COP"
hintIgnorePlanCache "IGNORE_PLAN_CACHE"
hintHashAgg "HASH_AGG"
hintIgnoreIndex "IGNORE_INDEX"
hintInlHashJoin "INL_HASH_JOIN"
hintInlJoin "INL_JOIN"
hintInlMergeJoin "INL_MERGE_JOIN"
hintMemoryQuota "MEMORY_QUOTA"
hintNoSwapJoinInputs "NO_SWAP_JOIN_INPUTS"
hintQueryType "QUERY_TYPE"
hintReadConsistentReplica "READ_CONSISTENT_REPLICA"
hintReadFromStorage "READ_FROM_STORAGE"
hintSMJoin "MERGE_JOIN"
hintStreamAgg "STREAM_AGG"
hintSwapJoinInputs "SWAP_JOIN_INPUTS"
hintUseIndexMerge "USE_INDEX_MERGE"
hintUseIndex "USE_INDEX"
hintUsePlanCache "USE_PLAN_CACHE"
hintUseToja "USE_TOJA"
hintTimeRange "TIME_RANGE"
hintUseCascades "USE_CASCADES"
/* Other keywords */
hintOLAP "OLAP"
hintOLTP "OLTP"
hintTiKV "TIKV"
hintTiFlash "TIFLASH"
hintFalse "FALSE"
hintTrue "TRUE"
hintMB "MB"
hintGB "GB"
hintDupsWeedOut "DUPSWEEDOUT"
hintFirstMatch "FIRSTMATCH"
hintLooseScan "LOOSESCAN"
hintMaterialization "MATERIALIZATION"
%type <ident>
Identifier "identifier (including keywords)"
QueryBlockOpt "Query block identifier optional"
JoinOrderOptimizerHintName
UnsupportedTableLevelOptimizerHintName
SupportedTableLevelOptimizerHintName
UnsupportedIndexLevelOptimizerHintName
SupportedIndexLevelOptimizerHintName
SubqueryOptimizerHintName
BooleanHintName "name of hints which take a boolean input"
NullaryHintName "name of hints which take no input"
SubqueryStrategy
Value "the value in the SET_VAR() hint"
HintQueryType "query type in optimizer hint (OLAP or OLTP)"
HintStorageType "storage type in optimizer hint (TiKV or TiFlash)"
%type <number>
UnitOfBytes "unit of bytes (MB or GB)"
CommaOpt "optional ','"
%type <hints>
OptimizerHintList "optimizer hint list"
StorageOptimizerHintOpt "storage level optimizer hint"
HintStorageTypeAndTableList "storage type and tables list in optimizer hint"
%type <hint>
TableOptimizerHintOpt "optimizer hint"
HintTableList "table list in optimizer hint"
HintTableListOpt "optional table list in optimizer hint"
HintIndexList "table name with index list in optimizer hint"
IndexNameList "index list in optimizer hint"
IndexNameListOpt "optional index list in optimizer hint"
SubqueryStrategies "subquery strategies"
SubqueryStrategiesOpt "optional subquery strategies"
HintTrueOrFalse "true or false in optimizer hint"
HintStorageTypeAndTable "storage type and tables in optimizer hint"
%type <table>
HintTable "Table in optimizer hint"
%start Start
%%
Start:
OptimizerHintList
{
parser.result = $1
}
OptimizerHintList:
TableOptimizerHintOpt
{
if $1 != nil {
$$ = []*ast.TableOptimizerHint{$1}
}
}
| OptimizerHintList CommaOpt TableOptimizerHintOpt
{
if $3 != nil {
$$ = append($1, $3)
} else {
$$ = $1
}
}
| StorageOptimizerHintOpt
{
$$ = $1
}
| OptimizerHintList CommaOpt StorageOptimizerHintOpt
{
$$ = append($1, $3...)
}
TableOptimizerHintOpt:
"JOIN_FIXED_ORDER" '(' QueryBlockOpt ')'
{
parser.warnUnsupportedHint($1)
$$ = nil
}
| JoinOrderOptimizerHintName '(' HintTableList ')'
{
parser.warnUnsupportedHint($1)
$$ = nil
}
| UnsupportedTableLevelOptimizerHintName '(' HintTableListOpt ')'
{
parser.warnUnsupportedHint($1)
$$ = nil
}
| SupportedTableLevelOptimizerHintName '(' HintTableListOpt ')'
{
h := $3
h.HintName = model.NewCIStr($1)
$$ = h
}
| UnsupportedIndexLevelOptimizerHintName '(' HintIndexList ')'
{
parser.warnUnsupportedHint($1)
$$ = nil
}
| SupportedIndexLevelOptimizerHintName '(' HintIndexList ')'
{
h := $3
h.HintName = model.NewCIStr($1)
$$ = h
}
| SubqueryOptimizerHintName '(' QueryBlockOpt SubqueryStrategiesOpt ')'
{
parser.warnUnsupportedHint($1)
$$ = nil
}
| "MAX_EXECUTION_TIME" '(' QueryBlockOpt hintIntLit ')'
{
$$ = &ast.TableOptimizerHint{
HintName: model.NewCIStr($1),
QBName: model.NewCIStr($3),
HintData: $4,
}
}
| "SET_VAR" '(' Identifier '=' Value ')'
{
parser.warnUnsupportedHint($1)
$$ = nil
}
| "RESOURCE_GROUP" '(' Identifier ')'
{
parser.warnUnsupportedHint($1)
$$ = nil
}
| "QB_NAME" '(' Identifier ')'
{
$$ = &ast.TableOptimizerHint{
HintName: model.NewCIStr($1),
QBName: model.NewCIStr($3),
}
}
| "MEMORY_QUOTA" '(' QueryBlockOpt hintIntLit UnitOfBytes ')'
{
maxValue := uint64(math.MaxInt64) / $5
if $4 <= maxValue {
$$ = &ast.TableOptimizerHint{
HintName: model.NewCIStr($1),
HintData: int64($4 * $5),
QBName: model.NewCIStr($3),
}
} else {
yylex.AppendError(ErrWarnMemoryQuotaOverflow.GenWithStackByArgs(math.MaxInt64))
parser.lastErrorAsWarn()
$$ = nil
}
}
| "TIME_RANGE" '(' hintStringLit CommaOpt hintStringLit ')'
{
$$ = &ast.TableOptimizerHint{
HintName: model.NewCIStr($1),
HintData: ast.HintTimeRange{
From: $3,
To: $5,
},
}
}
| BooleanHintName '(' QueryBlockOpt HintTrueOrFalse ')'
{
h := $4
h.HintName = model.NewCIStr($1)
h.QBName = model.NewCIStr($3)
$$ = h
}
| NullaryHintName '(' QueryBlockOpt ')'
{
$$ = &ast.TableOptimizerHint{
HintName: model.NewCIStr($1),
QBName: model.NewCIStr($3),
}
}
| "QUERY_TYPE" '(' QueryBlockOpt HintQueryType ')'
{
$$ = &ast.TableOptimizerHint{
HintName: model.NewCIStr($1),
QBName: model.NewCIStr($3),
HintData: model.NewCIStr($4),
}
}
StorageOptimizerHintOpt:
"READ_FROM_STORAGE" '(' QueryBlockOpt HintStorageTypeAndTableList ')'
{
hs := $4
name := model.NewCIStr($1)
qb := model.NewCIStr($3)
for _, h := range hs {
h.HintName = name
h.QBName = qb
}
$$ = hs
}
HintStorageTypeAndTableList:
HintStorageTypeAndTable
{
$$ = []*ast.TableOptimizerHint{$1}
}
| HintStorageTypeAndTableList ',' HintStorageTypeAndTable
{
$$ = append($1, $3)
}
HintStorageTypeAndTable:
HintStorageType '[' HintTableList ']'
{
h := $3
h.HintData = model.NewCIStr($1)
$$ = h
}
QueryBlockOpt:
/* empty */
{
$$ = ""
}
| hintSingleAtIdentifier
CommaOpt:
/*empty*/
{}
| ','
{}
/**
* HintTableListOpt:
*
* [@query_block_name] [tbl_name [, tbl_name] ...]
* [tbl_name@query_block_name [, tbl_name@query_block_name] ...]
*
*/
HintTableListOpt:
HintTableList
| QueryBlockOpt
{
$$ = &ast.TableOptimizerHint{
QBName: model.NewCIStr($1),
}
}
HintTableList:
QueryBlockOpt HintTable
{
$$ = &ast.TableOptimizerHint{
Tables: []ast.HintTable{$2},
QBName: model.NewCIStr($1),
}
}
| HintTableList ',' HintTable
{
h := $1
h.Tables = append(h.Tables, $3)
$$ = h
}
HintTable:
Identifier QueryBlockOpt
{
$$ = ast.HintTable{
TableName: model.NewCIStr($1),
QBName: model.NewCIStr($2),
}
}
| Identifier '.' Identifier QueryBlockOpt
{
$$ = ast.HintTable{
DBName: model.NewCIStr($1),
TableName: model.NewCIStr($3),
QBName: model.NewCIStr($4),
}
}
/**
* HintIndexList:
*
* [@query_block_name] tbl_name [index_name [, index_name] ...]
* tbl_name@query_block_name [index_name [, index_name] ...]
*/
HintIndexList:
QueryBlockOpt HintTable CommaOpt IndexNameListOpt
{
h := $4
h.Tables = []ast.HintTable{$2}
h.QBName = model.NewCIStr($1)
$$ = h
}
IndexNameListOpt:
/* empty */
{
$$ = &ast.TableOptimizerHint{}
}
| IndexNameList
IndexNameList:
Identifier
{
$$ = &ast.TableOptimizerHint{
Indexes: []model.CIStr{model.NewCIStr($1)},
}
}
| IndexNameList ',' Identifier
{
h := $1
h.Indexes = append(h.Indexes, model.NewCIStr($3))
$$ = h
}
/**
* Miscellaneous rules
*/
SubqueryStrategiesOpt:
/* empty */
{}
| SubqueryStrategies
SubqueryStrategies:
SubqueryStrategy
{}
| SubqueryStrategies ',' SubqueryStrategy
Value:
hintStringLit
| Identifier
| hintIntLit
{
$$ = strconv.FormatUint($1, 10)
}
UnitOfBytes:
"MB"
{
$$ = 1024 * 1024
}
| "GB"
{
$$ = 1024 * 1024 * 1024
}
HintTrueOrFalse:
"TRUE"
{
$$ = &ast.TableOptimizerHint{HintData: true}
}
| "FALSE"
{
$$ = &ast.TableOptimizerHint{HintData: false}
}
JoinOrderOptimizerHintName:
"JOIN_ORDER"
| "JOIN_PREFIX"
| "JOIN_SUFFIX"
UnsupportedTableLevelOptimizerHintName:
"BKA"
| "NO_BKA"
| "BNL"
| "NO_BNL"
/* HASH_JOIN is supported by TiDB */
| "NO_HASH_JOIN"
| "MERGE"
| "NO_MERGE"
SupportedTableLevelOptimizerHintName:
"MERGE_JOIN"
| "INL_JOIN"
| "INL_HASH_JOIN"
| "SWAP_JOIN_INPUTS"
| "NO_SWAP_JOIN_INPUTS"
| "INL_MERGE_JOIN"
| "HASH_JOIN"
UnsupportedIndexLevelOptimizerHintName:
"INDEX_MERGE"
/* NO_INDEX_MERGE is currently a nullary hint in TiDB */
| "MRR"
| "NO_MRR"
| "NO_ICP"
| "NO_RANGE_OPTIMIZATION"
| "SKIP_SCAN"
| "NO_SKIP_SCAN"
SupportedIndexLevelOptimizerHintName:
"USE_INDEX"
| "IGNORE_INDEX"
| "USE_INDEX_MERGE"
SubqueryOptimizerHintName:
"SEMIJOIN"
| "NO_SEMIJOIN"
SubqueryStrategy:
"DUPSWEEDOUT"
| "FIRSTMATCH"
| "LOOSESCAN"
| "MATERIALIZATION"
BooleanHintName:
"USE_TOJA"
| "USE_CASCADES"
NullaryHintName:
"USE_PLAN_CACHE"
| "HASH_AGG"
| "STREAM_AGG"
| "AGG_TO_COP"
| "NO_INDEX_MERGE"
| "READ_CONSISTENT_REPLICA"
| "IGNORE_PLAN_CACHE"
HintQueryType:
"OLAP"
| "OLTP"
HintStorageType:
"TIKV"
| "TIFLASH"
Identifier:
hintIdentifier
/* MySQL 8.0 hint names */
| "JOIN_FIXED_ORDER"
| "JOIN_ORDER"
| "JOIN_PREFIX"
| "JOIN_SUFFIX"
| "BKA"
| "NO_BKA"
| "BNL"
| "NO_BNL"
| "HASH_JOIN"
| "NO_HASH_JOIN"
| "MERGE"
| "NO_MERGE"
| "INDEX_MERGE"
| "NO_INDEX_MERGE"
| "MRR"
| "NO_MRR"
| "NO_ICP"
| "NO_RANGE_OPTIMIZATION"
| "SKIP_SCAN"
| "NO_SKIP_SCAN"
| "SEMIJOIN"
| "NO_SEMIJOIN"
| "MAX_EXECUTION_TIME"
| "SET_VAR"
| "RESOURCE_GROUP"
| "QB_NAME"
/* TiDB hint names */
| "AGG_TO_COP"
| "IGNORE_PLAN_CACHE"
| "HASH_AGG"
| "IGNORE_INDEX"
| "INL_HASH_JOIN"
| "INL_JOIN"
| "INL_MERGE_JOIN"
| "MEMORY_QUOTA"
| "NO_SWAP_JOIN_INPUTS"
| "QUERY_TYPE"
| "READ_CONSISTENT_REPLICA"
| "READ_FROM_STORAGE"
| "MERGE_JOIN"
| "STREAM_AGG"
| "SWAP_JOIN_INPUTS"
| "USE_INDEX_MERGE"
| "USE_INDEX"
| "USE_PLAN_CACHE"
| "USE_TOJA"
| "TIME_RANGE"
| "USE_CASCADES"
/* other keywords */
| "OLAP"
| "OLTP"
| "TIKV"
| "TIFLASH"
| "FALSE"
| "TRUE"
| "MB"
| "GB"
| "DUPSWEEDOUT"
| "FIRSTMATCH"
| "LOOSESCAN"
| "MATERIALIZATION"
%%
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