Examples with RowCountToken io.shardingjdbc.core.parsing.parser.token.RowCountToken used on opensource projects

Example 1 with RowCountToken

use of io.shardingjdbc.core.parsing.parser.token.RowCountToken in project sharding-jdbc by shardingjdbc.

the class WhereClauseParser method parseRowCountCondition.

private void parseRowCountCondition(final SelectStatement selectStatement, final boolean includeRowCount) {
    SQLExpression sqlExpression = basicExpressionParser.parse(selectStatement);
    if (null == selectStatement.getLimit()) {
        selectStatement.setLimit(new Limit(databaseType));
    }
    if (sqlExpression instanceof SQLNumberExpression) {
        int rowCount = ((SQLNumberExpression) sqlExpression).getNumber().intValue();
        selectStatement.getLimit().setRowCount(new LimitValue(rowCount, -1, includeRowCount));
        selectStatement.getSqlTokens().add(new RowCountToken(lexerEngine.getCurrentToken().getEndPosition() - String.valueOf(rowCount).length() - lexerEngine.getCurrentToken().getLiterals().length(), rowCount));
    } else if (sqlExpression instanceof SQLPlaceholderExpression) {
        selectStatement.getLimit().setRowCount(new LimitValue(-1, ((SQLPlaceholderExpression) sqlExpression).getIndex(), includeRowCount));
    }
}

Example 2 with RowCountToken

use of io.shardingjdbc.core.parsing.parser.token.RowCountToken in project sharding-jdbc by shardingjdbc.

the class MySQLLimitClauseParser method getLimitWithComma.

private Limit getLimitWithComma(final int index, final int valueBeginPosition, final int value, final boolean isParameterForValue, final SelectStatement selectStatement) {
    int rowCountBeginPosition = lexerEngine.getCurrentToken().getEndPosition();
    int rowCountValue;
    int rowCountIndex = -1;
    boolean isParameterForRowCount = false;
    if (lexerEngine.equalAny(Literals.INT)) {
        rowCountValue = Integer.parseInt(lexerEngine.getCurrentToken().getLiterals());
        rowCountBeginPosition = rowCountBeginPosition - (rowCountValue + "").length();
    } else if (lexerEngine.equalAny(Symbol.QUESTION)) {
        rowCountIndex = -1 == index ? selectStatement.getParametersIndex() : index + 1;
        rowCountValue = -1;
        rowCountBeginPosition--;
        isParameterForRowCount = true;
    } else {
        throw new SQLParsingException(lexerEngine);
    }
    lexerEngine.nextToken();
    if (isParameterForValue) {
        selectStatement.increaseParametersIndex();
    } else {
        selectStatement.getSqlTokens().add(new OffsetToken(valueBeginPosition, value));
    }
    if (isParameterForRowCount) {
        selectStatement.increaseParametersIndex();
    } else {
        selectStatement.getSqlTokens().add(new RowCountToken(rowCountBeginPosition, rowCountValue));
    }
    Limit result = new Limit(DatabaseType.MySQL);
    result.setRowCount(new LimitValue(rowCountValue, rowCountIndex, false));
    result.setOffset(new LimitValue(value, index, true));
    return result;
}

Example 3 with RowCountToken

use of io.shardingjdbc.core.parsing.parser.token.RowCountToken in project sharding-jdbc by shardingjdbc.

the class MySQLLimitClauseParser method parse.

/**
 * Parse limit.
 *
 * @param selectStatement select statement
 */
public void parse(final SelectStatement selectStatement) {
    if (!lexerEngine.skipIfEqual(MySQLKeyword.LIMIT)) {
        return;
    }
    int valueIndex = -1;
    int valueBeginPosition = lexerEngine.getCurrentToken().getEndPosition();
    int value;
    boolean isParameterForValue = false;
    if (lexerEngine.equalAny(Literals.INT)) {
        value = Integer.parseInt(lexerEngine.getCurrentToken().getLiterals());
        valueBeginPosition = valueBeginPosition - (value + "").length();
    } else if (lexerEngine.equalAny(Symbol.QUESTION)) {
        valueIndex = selectStatement.getParametersIndex();
        value = -1;
        valueBeginPosition--;
        isParameterForValue = true;
    } else {
        throw new SQLParsingException(lexerEngine);
    }
    lexerEngine.nextToken();
    if (lexerEngine.skipIfEqual(Symbol.COMMA)) {
        selectStatement.setLimit(getLimitWithComma(valueIndex, valueBeginPosition, value, isParameterForValue, selectStatement));
        return;
    }
    if (lexerEngine.skipIfEqual(MySQLKeyword.OFFSET)) {
        selectStatement.setLimit(getLimitWithOffset(valueIndex, valueBeginPosition, value, isParameterForValue, selectStatement));
        return;
    }
    if (isParameterForValue) {
        selectStatement.increaseParametersIndex();
    } else {
        selectStatement.getSqlTokens().add(new RowCountToken(valueBeginPosition, value));
    }
    Limit limit = new Limit(DatabaseType.MySQL);
    limit.setRowCount(new LimitValue(value, valueIndex, false));
    selectStatement.setLimit(limit);
}

Example 4 with RowCountToken

use of io.shardingjdbc.core.parsing.parser.token.RowCountToken in project sharding-jdbc by shardingjdbc.

the class PostgreSQLLimitClauseParser method buildRowCount.

private Optional<LimitValue> buildRowCount(final SelectStatement selectStatement) {
    int parameterIndex = selectStatement.getParametersIndex();
    int rowCountValue = -1;
    int rowCountIndex = -1;
    int valueBeginPosition = lexerEngine.getCurrentToken().getEndPosition();
    if (lexerEngine.equalAny(DefaultKeyword.ALL)) {
        lexerEngine.nextToken();
    } else {
        if (lexerEngine.equalAny(Literals.INT, Literals.FLOAT)) {
            rowCountValue = NumberUtil.roundHalfUp(lexerEngine.getCurrentToken().getLiterals());
            valueBeginPosition = valueBeginPosition - (rowCountValue + "").length();
            selectStatement.getSqlTokens().add(new RowCountToken(valueBeginPosition, rowCountValue));
        } else if (lexerEngine.equalAny(Symbol.QUESTION)) {
            rowCountIndex = parameterIndex++;
            selectStatement.setParametersIndex(parameterIndex);
            rowCountValue = -1;
        } else {
            throw new SQLParsingException(lexerEngine);
        }
        lexerEngine.nextToken();
    }
    return Optional.of(new LimitValue(rowCountValue, rowCountIndex, false));
}

Example 5 with RowCountToken

use of io.shardingjdbc.core.parsing.parser.token.RowCountToken in project sharding-jdbc by shardingjdbc.

the class SQLRewriteEngineTest method assertRewriteForTopAndRowNumberForNotRewriteLimit.

@Test
public void assertRewriteForTopAndRowNumberForNotRewriteLimit() {
    selectStatement.setLimit(new Limit(DatabaseType.SQLServer));
    selectStatement.getLimit().setOffset(new LimitValue(2, -1, true));
    selectStatement.getLimit().setRowCount(new LimitValue(4, -1, false));
    selectStatement.getSqlTokens().add(new TableToken(85, "table_x"));
    selectStatement.getSqlTokens().add(new OffsetToken(123, 2));
    selectStatement.getSqlTokens().add(new RowCountToken(26, 4));
    SQLRewriteEngine rewriteEngine = new SQLRewriteEngine(shardingRule, "SELECT * FROM (SELECT TOP(4) row_number() OVER (ORDER BY x.id) AS rownum_, x.id FROM table_x x) AS row_ WHERE row_.rownum_>2", DatabaseType.SQLServer, selectStatement);
    assertThat(rewriteEngine.rewrite(false).toSQL(tableTokens, null), is("SELECT * FROM (SELECT TOP(4) row_number() OVER (ORDER BY x.id) AS rownum_, x.id FROM table_1 x) AS row_ WHERE row_.rownum_>2"));
}