Mysql 客户端预处理入口

入口

    public java.sql.PreparedStatement clientPrepareStatement(String sql, int resultSetType, int resultSetConcurrency, boolean processEscapeCodesIfNeeded)
            throws SQLException {

        String nativeSql = processEscapeCodesIfNeeded && this.processEscapeCodesForPrepStmts.getValue() ? nativeSQL(sql) : sql;

        ClientPreparedStatement pStmt = null;

        if (this.cachePrepStmts.getValue()) {
            ParseInfo pStmtInfo = this.cachedPreparedStatementParams.get(nativeSql);

            if (pStmtInfo == null) {
                pStmt = ClientPreparedStatement.getInstance(getMultiHostSafeProxy(), nativeSql, this.database);

                this.cachedPreparedStatementParams.put(nativeSql, pStmt.getParseInfo());
            } else {
                pStmt = ClientPreparedStatement.getInstance(getMultiHostSafeProxy(), nativeSql, this.database, pStmtInfo);
            }
        } else {
            pStmt = ClientPreparedStatement.getInstance(getMultiHostSafeProxy(), nativeSql, this.database);
        }

        pStmt.setResultSetType(resultSetType);
        pStmt.setResultSetConcurrency(resultSetConcurrency);

        return pStmt;
    }