Custom SQL Filter BNF

TOKENS

<DEFAULT> SKIP : {
" "
| "\t"
| "\r"
| "\n"
| "/*" : WithinCComment
| "--" : WithinSqlComment
}

<WithinCComment> SKIP : {
"*/" : DEFAULT
}


<WithinCComment> MORE : {
<~[]>
}



<WithinSqlComment> SKIP : {
"\n" : DEFAULT
}


<WithinSqlComment> MORE : {
<~[]>
}


<DEFAULT> TOKEN : {
<KEYWORD_ALL: "ALL">
| <KEYWORD_AND: "AND">
| <KEYWORD_ANY: "ANY">
| <KEYWORD_AS: "AS">
| <KEYWORD_ASC: "ASC">
| <KEYWORD_BETWEEN: "BETWEEN">
| <KEYWORD_BY: "BY">
| <KEYWORD_DELETE: "DELETE">
| <KEYWORD_ESCAPE: "ESCAPE">
| <KEYWORD_DESC: "DESC">
| <KEYWORD_DISTINCT: "DISTINCT">
| <KEYWORD_EXISTS: "EXISTS">
| <KEYWORD_FN_AVG: "AVG">
| <KEYWORD_FN_COUNT: "COUNT">
| <KEYWORD_FN_MIN: "MIN">
| <KEYWORD_FN_MAX: "MAX">
| <KEYWORD_FN_SUM: "SUM">
| <KEYWORD_FN_BANNED_BIT_LENGTH: "BIT_LENGTH">
| <KEYWORD_FN_BANNED_CAST: "CAST">
| <KEYWORD_FN_BANNED_CONVERT: "CONVERT">
| <KEYWORD_FN_BANNED_CURRENT_DATE: "CURRENT_DATE">
| <KEYWORD_FN_BANNED_CURRENT_TIME: "CURRENT_TIME">
| <KEYWORD_FN_BANNED_CURRENT_TIMESTAMP: "CURRENT_TIMESTAMP">
| <KEYWORD_FN_BANNED_EXTRACT: "EXTRACT">
| <KEYWORD_FN_BANNED_LENGTH: "LENGTH">
| <KEYWORD_FN_BANNED_LOWER: "LOWER">
| <KEYWORD_FN_BANNED_POSITION: "POSITION">
| <KEYWORD_FN_BANNED_SUBSTRING: "SUBSTRING">
| <KEYWORD_FN_BANNED_TRANSLATE: "TRANSLATE">
| <KEYWORD_FN_NOW: "NOW">
| <KEYWORD_FN_FORMAT_NOW: "FORMAT_NOW">
| <KEYWORD_FN_FORMAT_EXPRESSION: "FORMAT_EXPRESSION">
| <KEYWORD_FN_BANNED_TRIM: "TRIM">
| <KEYWORD_FN_BANNED_UPPER: "UPPER">
| <KEYWORD_FOR: "FOR">
| <KEYWORD_FROM: "FROM">
| <KEYWORD_GROUP: "GROUP">
| <KEYWORD_HAVING: "HAVING">
| <KEYWORD_IN: "IN">
| <KEYWORD_INNER: "INNER">
| <KEYWORD_INSERT: "INSERT">
| <KEYWORD_INTERSECT: "INTERSECT">
| <KEYWORD_INTO: "INTO">
| <KEYWORD_IS: "IS">
| <KEYWORD_JOIN: "JOIN">
| <KEYWORD_JAVAENV: "JAVAENV">
| <KEYWORD_TODATE: "TODATE">
| <KEYWORD_LEFT: "LEFT">
| <KEYWORD_LIKE: "LIKE">
| <KEYWORD_LOCK: "LOCK">
| <KEYWORD_MINUS: "MINUS">
| <KEYWORD_MODE: "MODE">
| <KEYWORD_NOT: "NOT">
| <KEYWORD_NULL: "NULL">
| <KEYWORD_STRINGNULL: "STRINGNULL">
| <KEYWORD_DATENULL: "DATENULL">
| <KEYWORD_KEYNULL: "KEYNULL">
| <KEYWORD_FNULL: "FNULL">
| <KEYWORD_OF: "OF">
| <KEYWORD_OR: "OR">
| <KEYWORD_ON: "ON">
| <KEYWORD_ORDER: "ORDER">
| <KEYWORD_OUTER: "OUTER">
| <KEYWORD_RIGHT: "RIGHT">
| <KEYWORD_SELECT: "SELECT">
| <KEYWORD_SET: "SET">
| <KEYWORD_SOME: "SOME">
| <KEYWORD_UNION: "UNION">
| <KEYWORD_UPDATE: "UPDATE">
| <KEYWORD_VALUES: "VALUES">
| <KEYWORD_WHERE: "WHERE">
| <RESERVED_WORD_ROLE: "ROLE">
| <RESERVED_WORD_PARTITION: "PARTITION">
}


<DEFAULT> TOKEN : {
<TOKEN_NUMBER: <FLOAT> | <FLOAT> (["e","E"] (["-","+"])? <FLOAT>)?>
| <#FLOAT: <INTEGER> | <INTEGER> ("." <INTEGER>)? | "." <INTEGER>>
| <#INTEGER: (<DIGIT>)+>
| <#DIGIT: ["0"-"9"]>
}


<DEFAULT> TOKEN : {
<TOKEN_IDENTIFIER: (<LETTER>)+ (<DIGIT> | <LETTER> | "_")*>
| <#LETTER: ["a"-"z","A"-"Z"]>
| <TOKEN_BIND: "?">
| <TOKEN_CHAR_LITERAL: ("\'" (~["\'"])* "\'")+>
}

NON-TERMINALS

Identifier	::=	<TOKEN_IDENTIFIER>
NullLiteral	::=	"NULL"
StringLiteral	::=	<TOKEN_CHAR_LITERAL>
NumberLiteral	::=	<TOKEN_NUMBER>
BindVariable	::=	"?"
TopLevelSQLStatement	::=	SQLStatement
TopLevelWhereClause	::=	WhereClause <EOF>
SQLStatement	::=	(UpdateStatement | InsertStatement | DeleteStatement | SelectStatement) <EOF>
UpdateStatement	::=	"UPDATE" TableReference "SET" UpdateValues (WhereClause)?
UpdateValues	::=	UpdateValue ( "," UpdateValue)*
UpdateValue	::=	TableColumn "=" UpdateValueRHS
UpdateValueRHS	::=	(TableColumn (SQLUnaryExpression)? | SQLLiteralExpression)
InsertStatement	::=	"INSERT" "INTO" TableReference ( "(" TableColumn ( "," TableColumn)* ")" )? ( "VALUES" "(" SQLLiteralExpression ( "," SQLLiteralExpression)* ")" )
DeleteStatement	::=	"DELETE" ( "FROM" )? TableReference (WhereClause)?
TableColumn	::=	RelObjectName ( "." RelObjectName)?
RelObjectName	::=	( "LENGTH" | "POSITION" | "PARTITION" | <TOKEN_IDENTIFIER> )
Comparison	::=	( "=" | "<>" | ">" | ">=" | "<" | "<=" )
TableReference	::=	RelObjectName
TableReferenceWithAlias	::=	TableReference (AsObjectName)?
SelectStatement	::=	SelectWithoutOrder (OrderByClause | ForUpdateClause)?
SelectWithoutOrder	::=	"SELECT" (SelectDistinctOperator | SelectAllOperator) SelectListFromClauseWherePlaceHolder (GroupByClause)? (SetContinuation)?
SelectList	::=	(SelectStar | SelectItemWithAlias ( "," SelectItemWithAlias)* )
SelectAllOperator	::=	( "ALL" )?
SelectDistinctOperator	::=	"DISTINCT"
SelectStar	::=	"*"
SelectItemWithAlias	::=	SelectItem (AsObjectName)?
SelectItem	::=	( <TOKEN_NUMBER> | <TOKEN_CHAR_LITERAL> | SetFunctionCall | SelectAllItems | TableColumn)
SelectAllItems	::=	RelObjectName "." "*"
AsObjectName	::=	( "AS" )? <TOKEN_IDENTIFIER>
FromClause	::=	"FROM" FromItem ( "," FromItem)*
FromItem	::=	(JoinedPrimaryTable | JoinedPrimaryTableNested)
JoinedPrimaryTable	::=	TableReferenceWithAlias (JoinClause)*
JoinedPrimaryTableNested	::=	"(" JoinedPrimaryTableNestedInnerClause ")" (JoinClause)+
JoinedPrimaryTableNestedInnerClause	::=	(TableReferenceWithAlias (JoinClause)+ | JoinedPrimaryTableNested)
JoinClause	::=	LeftJoinSubClause|InnerJoinSubClause
LeftJoinSubClause	::=	"LEFT" ( "OUTER" )? "JOIN" TableReferenceWithAliasJoinOnClause
InnerJoinSubClause	::=	( "INNER" )? "JOIN" TableReferenceWithAliasJoinOnClause
JoinOnClause	::=	"ON" SQLExpression
WherePlaceHolder	::=	(WhereClause)?
WhereClause	::=	"WHERE" SQLExpression
GroupByClause	::=	"GROUP" "BY" SQLExpressionList ( "HAVING" SQLExpression)?
SetContinuation	::=	( "UNION" ( "ALL" )? | "INTERSECT" | "MINUS" ) ( "(" SelectWithoutOrder ")" | SelectWithoutOrder)
OrderByClause	::=	"ORDER" "BY" OrderByExpression ( "," OrderByExpression)*
OrderByExpression	::=	OrderByColumn (OrderByAscendingClause | OrderByDescendingClause)?
OrderByColumn	::=	RelObjectName ( "." RelObjectName)?
OrderByAscendingClause	::=	<KEYWORD_ASC>
OrderByDescendingClause	::=	<KEYWORD_DESC>
ForUpdateClause	::=	"FOR" "UPDATE" "OF" RelObjectName "." RelObjectName
SQLExpression	::=	SQLOrExpression
SQLNotExpression	::=	"NOT"
SQLOrExpression	::=	SQLAndExpression ( "OR" SQLAndExpression)*
SQLAndExpression	::=	SQLUnaryLogicalExpressions ( "AND" SQLUnaryLogicalExpressions)*
SQLUnaryLogicalExpressions	::=	(SQLNotExpression)? (ExistsClause | SQLRelationalExpressions)
ExistsClause	::=	"EXISTS" "(" SubQuery ")"
SQLRelationalExpressions	::=	SQLSimpleExpression (SQLRelationalExpression | SQLComparisonExpression)?
SQLRelationalExpression	::=	( "IS" ( "NOT" )? IsNullClause | ( (SQLNotExpression)? (IsNullClause | SQLInOperator | SQLBetweenOperator | SQLLikeOperator) ) )
IsNullClause	::=	( "NULL" | "STRINGNULL" | "DATENULL" | "KEYNULL" )
SQLExpressionList	::=	SQLSimpleExpression ( "," SQLSimpleExpression)*
SQLComparisonExpression	::=	Comparison ( (ComparativeSubQueryType "(" SubQuery ")" ) | SQLSimpleExpression)
ComparativeSubQueryType	::=	(AnySubQueryType | AllSubQueryType)?
AnySubQueryType	::=	( "ANY" | "SOME" )
AllSubQueryType	::=	"ALL"
SQLInOperator	::=	"IN" "(" (SQLExpressionList | SubQuery) ")"
SQLBetweenOperator	::=	"BETWEEN" SQLSimpleExpression "AND" SQLSimpleExpression
SQLLikeOperator	::=	"LIKE" SQLSimpleExpression (SQLLikeEscapeExpression)?
SQLLikeEscapeExpression	::=	"ESCAPE" StringLiteral
SQLSimpleExpression	::=	SQLAdditiveExpression
SQLAdditiveExpression	::=	SQLMultiplicativeExpression ( ( "+" | "-" | "||" ) SQLAdditiveExpression)?
SQLMultiplicativeExpression	::=	SQLUnaryExpression ( ( "*" | "/" ) SQLMultiplicativeExpression)?
SQLUnaryExpression	::=	( "+" | "-" )? SQLPrimaryExpression
SQLPrimaryExpression	::=	SQLLiteralExpression|FunctionCall|TableColumn|"(" SQLExpression ")"
SQLLiteralExpression	::=	(NullLiteral | NumberLiteral | StringLiteral | BindVariable)
FunctionCall	::=	JavaEnvFunctionCall|ToDateFunctionCall|NowFunctionCall|FormatNowFunctionCall|FormatExpressionFunctionCall|FNullCall|SetFunctionCall|BannedFunctionCall
SetFunctionCall	::=	( "COUNT" "(" (CountArguments) ")" | "MIN" "(" (GeneralFunctionArguments) ")" | "MAX" "(" (GeneralFunctionArguments) ")" | "SUM" "(" (GeneralFunctionArguments) ")" | "AVG" "(" (GeneralFunctionArguments) ")" )
FNullCall	::=	"FNULL" "(" (Identifier "," Identifier "," Identifier) ")"
BannedFunctionCall	::=	( "BIT_LENGTH" | "CAST" | "CONVERT" | "CURRENT_DATE" | "CURRENT_TIME" | "CURRENT_TIMESTAMP" | "EXTRACT" | "LENGTH" | "LOWER" | "POSITION" | "SUBSTRING" | "TRANSLATE" | "TRIM" | "UPPER" ) "(" (GeneralFunctionArguments) ")"
CountArguments	::=	SelectStar|(SelectDistinctOperator|SQLPrimaryExpression)
GeneralFunctionArguments	::=	SelectStar|( (SelectDistinctOperator | SelectAllOperator) SQLExpression)
JavaEnvFunctionCall	::=	"JAVAENV" "(" (StringLiteral) ")" where StringLiteral is either UserAndGlobalIsolationGroupIds, UserId, or User
ToDateFunctionCall	::=	"TODATE" "(" (StringLiteral "," StringLiteral ( "," StringLiteral)? ) ")"
NowFunctionCall	::=	"NOW" "(" (StringLiteral ( "," StringLiteral)? )? ")"
FormatNowFunctionCall	::=	"FORMAT_NOW" "(" (StringLiteral ( "," StringLiteral)? ) ")"
FormatExpressionFunctionCall	::=	"FORMAT_EXPRESSION" "(" (StringLiteral "," StringLiteral ( "," StringLiteral)? ) ")"
SubQuery	::=	SelectWithoutOrder