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|
parser grammar SchemaParser;
options {
language=Java;
tokenVocab=SchemaLexer;
}
@header {
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
}
schema: (columns | LEFT_PAREN columns RIGHT_PAREN) EOF;
columns: column (COMMA column)*;
column: (primitive_column | map_column | simple_array_column | complex_array_column);
primitive_column: column_id simple_type nullability?;
simple_array_column: column_id simple_array_type nullability?;
map_column: column_id map_type nullability?;
complex_array_column: column_id complex_array_type nullability?;
column_id
: ID # id
| QUOTED_ID # quoted_id
;
simple_type
: (INT | INTEGER) # int
| BIGINT # bigint
| FLOAT # float
| DOUBLE # double
| (DEC | DECIMAL | NUMERIC) (LEFT_PAREN NUMBER (COMMA NUMBER)? RIGHT_PAREN)? # decimal
| BOOLEAN # boolean
| (CHAR | VARCHAR | CHARACTER VARYING?) (LEFT_PAREN NUMBER RIGHT_PAREN)? # varchar
| (BINARY | VARBINARY) (LEFT_PAREN NUMBER RIGHT_PAREN)? # binary
| TIME (LEFT_PAREN NUMBER RIGHT_PAREN)? # time
| DATE # date
| TIMESTAMP (LEFT_PAREN NUMBER RIGHT_PAREN)? # timestamp
| INTERVAL (YEAR | MONTH) # interval_year
| INTERVAL (DAY | HOUR | MINUTE | SECOND) # interval_day
| INTERVAL # interval
;
complex_type: (simple_array_type | complex_array_type);
simple_array_type: ARRAY LEFT_ANGLE_BRACKET (simple_type | map_type) RIGHT_ANGLE_BRACKET;
complex_array_type: ARRAY LEFT_ANGLE_BRACKET complex_type RIGHT_ANGLE_BRACKET;
map_type: MAP LEFT_ANGLE_BRACKET columns RIGHT_ANGLE_BRACKET;
nullability: NOT NULL;
|
