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f3c6cb40d7
Instead of setting an error in the execution context, we can directly return that error or the successful value. This lets all callers, who were already TRY-capable, simply TRY the expression evaluation.
77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
/*
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* Copyright (c) 2021, Jan de Visser <jan@de-visser.net>
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* Copyright (c) 2021, Mahmoud Mandour <ma.mandourr@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibSQL/AST/AST.h>
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#include <LibSQL/Database.h>
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#include <LibSQL/Meta.h>
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#include <LibSQL/Row.h>
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namespace SQL::AST {
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static bool does_value_data_type_match(SQLType expected, SQLType actual)
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{
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if (actual == SQLType::Null)
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return false;
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if (expected == SQLType::Integer)
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return actual == SQLType::Integer || actual == SQLType::Float;
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return expected == actual;
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}
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ResultOr<ResultSet> Insert::execute(ExecutionContext& context) const
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{
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auto table_def = TRY(context.database->get_table(m_schema_name, m_table_name));
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if (!table_def) {
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auto schema_name = m_schema_name.is_empty() ? String("default"sv) : m_schema_name;
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return Result { SQLCommand::Insert, SQLErrorCode::TableDoesNotExist, String::formatted("{}.{}", schema_name, m_table_name) };
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}
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Row row(table_def);
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for (auto& column : m_column_names) {
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if (!row.has(column))
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return Result { SQLCommand::Insert, SQLErrorCode::ColumnDoesNotExist, column };
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}
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ResultSet result { SQLCommand::Insert };
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TRY(result.try_ensure_capacity(m_chained_expressions.size()));
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context.result = Result { SQLCommand::Insert };
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for (auto& row_expr : m_chained_expressions) {
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for (auto& column_def : table_def->columns()) {
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if (!m_column_names.contains_slow(column_def.name()))
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row[column_def.name()] = column_def.default_value();
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}
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auto row_value = TRY(row_expr.evaluate(context));
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VERIFY(row_value.type() == SQLType::Tuple);
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auto values = row_value.to_vector().value();
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if (m_column_names.is_empty() && values.size() != row.size())
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return Result { SQLCommand::Insert, SQLErrorCode::InvalidNumberOfValues, String::empty() };
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for (auto ix = 0u; ix < values.size(); ix++) {
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auto input_value_type = values[ix].type();
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auto& tuple_descriptor = *row.descriptor();
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// In case of having column names, this must succeed since we checked for every column name for existence in the table.
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auto element_index = m_column_names.is_empty() ? ix : tuple_descriptor.find_if([&](auto element) { return element.name == m_column_names[ix]; }).index();
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auto element_type = tuple_descriptor[element_index].type;
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if (!does_value_data_type_match(element_type, input_value_type))
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return Result { SQLCommand::Insert, SQLErrorCode::InvalidValueType, table_def->columns()[element_index].name() };
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row[element_index] = values[ix];
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}
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TRY(context.database->insert(row));
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result.insert_row(row, {});
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}
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return result;
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}
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}
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