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%% Copyright (c) 2023 Peter Morgan <peter.james.morgan@gmail.com> |
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%% |
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%% Licensed under the Apache License, Version 2.0 (the "License"); |
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%% you may not use this file except in compliance with the License. |
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%% You may obtain a copy of the License at |
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%% |
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%% http://www.apache.org/licenses/LICENSE-2.0 |
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%% |
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%% Unless required by applicable law or agreed to in writing, software |
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%% distributed under the License is distributed on an "AS IS" BASIS, |
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%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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%% See the License for the specific language governing permissions and |
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%% limitations under the License. |
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-module(pgsqlp_tx). |
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-export([expression/0]). |
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-import(pgsqlp, [to_atom/1]). |
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-import(scran_branch, [alt/1]). |
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-import(scran_character_complete, [multispace1/0]). |
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-import(scran_character_complete, [tag_no_case/1]). |
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-import(scran_combinator, [ignore_result/1]). |
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-import(scran_combinator, [opt/1]). |
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-import(scran_multi, [separated_list1/2]). |
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-import(scran_result, [kv/2]). |
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-import(scran_sequence, [preceded/2]). |
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-import(scran_sequence, [sequence/1]). |
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expression() -> |
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fun |
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(Input) -> |
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(alt([begin_expression(), |
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commit_expression()]))(Input) |
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end. |
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begin_expression() -> |
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sequence( |
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[kv(action, to_atom(tag_no_case("BEGIN"))), |
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ignore_result( |
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opt(preceded( |
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multispace1(), |
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alt([tag_no_case("WORK"), tag_no_case("TRANSACTION")])))), |
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opt(preceded( |
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multispace1(), |
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separated_list1( |
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multispace1(), |
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alt([kv(isolation_level, |
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preceded( |
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sequence([tag_no_case("ISOLATION LEVEL"), |
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multispace1()]), |
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to_atom( |
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alt([tag_no_case("SERIALIZABLE"), |
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tag_no_case("REPEATABLE READ"), |
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tag_no_case("READ COMMITTED"), |
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tag_no_case("READ UNCOMMITTED")])))), |
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kv(read_level, |
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to_atom( |
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alt([tag_no_case("READ WRITE"), |
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tag_no_case("READ ONLY")]))), |
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kv(deferrable, |
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to_atom( |
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alt([tag_no_case("NOT DEFERRABLE"), |
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tag_no_case("DEFERRABLE")])))]))))]). |
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commit_expression() -> |
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sequence([kv(action, to_atom(tag_no_case("COMMIT")))]). |