Revert syntax change

Signed-off-by: Louis Chu <[email protected]>

async-query-core/src/main/antlr/SqlBaseLexer.g4

@@ -162,7 +162,6 @@ CLUSTERED: 'CLUSTERED';
 CODEGEN: 'CODEGEN';
 COLLATE: 'COLLATE';
 COLLATION: 'COLLATION';
-COLLATIONS: 'COLLATIONS';
 COLLECTION: 'COLLECTION';
 COLUMN: 'COLUMN';
 COLUMNS: 'COLUMNS';
@@ -277,15 +276,13 @@ INTO: 'INTO';
 INVOKER: 'INVOKER';
 IS: 'IS';
 ITEMS: 'ITEMS';
-ITERATE: 'ITERATE';
 JOIN: 'JOIN';
 KEYS: 'KEYS';
 LANGUAGE: 'LANGUAGE';
 LAST: 'LAST';
 LATERAL: 'LATERAL';
 LAZY: 'LAZY';
 LEADING: 'LEADING';
-LEAVE: 'LEAVE';
 LEFT: 'LEFT';
 LIKE: 'LIKE';
 ILIKE: 'ILIKE';
@@ -365,7 +362,6 @@ REFERENCES: 'REFERENCES';
 REFRESH: 'REFRESH';
 RENAME: 'RENAME';
 REPAIR: 'REPAIR';
-REPEAT: 'REPEAT';
 REPEATABLE: 'REPEATABLE';
 REPLACE: 'REPLACE';
 RESET: 'RESET';
@@ -455,7 +451,6 @@ UNKNOWN: 'UNKNOWN';
 UNLOCK: 'UNLOCK';
 UNPIVOT: 'UNPIVOT';
 UNSET: 'UNSET';
-UNTIL: 'UNTIL';
 UPDATE: 'UPDATE';
 USE: 'USE';
 USER: 'USER';

async-query-core/src/main/antlr/SqlBaseParser.g4

@@ -64,11 +64,7 @@ compoundStatement
     | setStatementWithOptionalVarKeyword
     | beginEndCompoundBlock
     | ifElseStatement
-    | caseStatement
     | whileStatement
-    | repeatStatement
-    | leaveStatement
-    | iterateStatement
     ;
 
 setStatementWithOptionalVarKeyword
@@ -87,25 +83,6 @@ ifElseStatement
         (ELSE elseBody=compoundBody)? END IF
     ;
 
-repeatStatement
-    : beginLabel? REPEAT compoundBody UNTIL booleanExpression END REPEAT endLabel?
-    ;
-
-leaveStatement
-    : LEAVE multipartIdentifier
-    ;
-
-iterateStatement
-    : ITERATE multipartIdentifier
-    ;
-
-caseStatement
-    : CASE (WHEN conditions+=booleanExpression THEN conditionalBodies+=compoundBody)+
-        (ELSE elseBody=compoundBody)? END CASE                #searchedCaseStatement
-    | CASE caseVariable=expression (WHEN conditionExpressions+=expression THEN conditionalBodies+=compoundBody)+
-        (ELSE elseBody=compoundBody)? END CASE                #simpleCaseStatement
-    ;
-
 singleStatement
     : (statement|setResetStatement) SEMICOLON* EOF
     ;
@@ -268,7 +245,6 @@ statement
     | SHOW PARTITIONS identifierReference partitionSpec?               #showPartitions
     | SHOW identifier? FUNCTIONS ((FROM | IN) ns=identifierReference)?
         (LIKE? (legacy=multipartIdentifier | pattern=stringLit))?      #showFunctions
-    | SHOW COLLATIONS (LIKE? pattern=stringLit)?                       #showCollations
     | SHOW CREATE TABLE identifierReference (AS SERDE)?                #showCreateTable
     | SHOW CURRENT namespace                                           #showCurrentNamespace
     | SHOW CATALOGS (LIKE? pattern=stringLit)?                            #showCatalogs
@@ -1602,12 +1578,10 @@ ansiNonReserved
     | INTERVAL
     | INVOKER
     | ITEMS
-    | ITERATE
     | KEYS
     | LANGUAGE
     | LAST
     | LAZY
-    | LEAVE
     | LIKE
     | ILIKE
     | LIMIT
@@ -1674,7 +1648,6 @@ ansiNonReserved
     | REFRESH
     | RENAME
     | REPAIR
-    | REPEAT
     | REPEATABLE
     | REPLACE
     | RESET
@@ -1750,7 +1723,6 @@ ansiNonReserved
     | UNLOCK
     | UNPIVOT
     | UNSET
-    | UNTIL
     | UPDATE
     | USE
     | VALUES
@@ -1846,7 +1818,6 @@ nonReserved
     | CODEGEN
     | COLLATE
     | COLLATION
-    | COLLATIONS
     | COLLECTION
     | COLUMN
     | COLUMNS
@@ -1956,13 +1927,11 @@ nonReserved
     | INVOKER
     | IS
     | ITEMS
-    | ITERATE
     | KEYS
     | LANGUAGE
     | LAST
     | LAZY
     | LEADING
-    | LEAVE
     | LIKE
     | LONG
     | ILIKE
@@ -2040,7 +2009,6 @@ nonReserved
     | REFRESH
     | RENAME
     | REPAIR
-    | REPEAT
     | REPEATABLE
     | REPLACE
     | RESET
@@ -2125,7 +2093,6 @@ nonReserved
     | UNLOCK
     | UNPIVOT
     | UNSET
-    | UNTIL
     | UPDATE
     | USE
     | USER