original_string: public function replace_all_text($table, database_column_info $column, $search, $replace) {
          if (!$this->replace_all_text_supported()) {
              return;
          }
  
          // NOTE: override this methods if following standard compliant SQL
          //       does not work for your driver.
  
          // Enclose the column name by the proper quotes if it's a reserved word.
          $columnname = $this->get_manager()->generator->getEncQuoted($column->name);
  
          $searchsql = $this->sql_like($columnname, '?');
          $searchparam = '%'.$this->sql_like_escape($search).'%';
  
          $sql = "UPDATE {".$table."}
                         SET $columnname = REPLACE($columnname, ?, ?)
                       WHERE $searchsql";
  
          if ($column->meta_type === 'X') {
              $this->execute($sql, array($search, $replace, $searchparam));
  
          } else if ($column->meta_type === 'C') {
              if (core_text::strlen($search) < core_text::strlen($replace)) {
                  $colsize = $column->max_length;
                  $sql = "UPDATE {".$table."}
                         SET $columnname = " . $this->sql_substr("REPLACE(" . $columnname . ", ?, ?)", 1, $colsize) . "
                       WHERE $searchsql";
              }
              $this->execute($sql, array($search, $replace, $searchparam));
          }
      }
code: public function replace_all_text($table, database_column_info $column, $search, $replace) {
          if (!$this->replace_all_text_supported()) {
              return;
          }
  
          // NOTE: override this methods if following standard compliant SQL
          //       does not work for your driver.
  
          // Enclose the column name by the proper quotes if it's a reserved word.
          $columnname = $this->get_manager()->generator->getEncQuoted($column->name);
  
          $searchsql = $this->sql_like($columnname, '?');
          $searchparam = '%'.$this->sql_like_escape($search).'%';
  
          $sql = "UPDATE {".$table."}
                         SET $columnname = REPLACE($columnname, ?, ?)
                       WHERE $searchsql";
  
          if ($column->meta_type === 'X') {
              $this->execute($sql, array($search, $replace, $searchparam));
  
          } else if ($column->meta_type === 'C') {
              if (core_text::strlen($search) < core_text::strlen($replace)) {
                  $colsize = $column->max_length;
                  $sql = "UPDATE {".$table."}
                         SET $columnname = " . $this->sql_substr("REPLACE(" . $columnname . ", ?, ?)", 1, $colsize) . "
                       WHERE $searchsql";
              }
              $this->execute($sql, array($search, $replace, $searchparam));
          }
      }
code_tokens: public function replace_all_text ( $ table , database_column_info $ column , $ search , $ replace ) { if ( ! $ this -> replace_all_text_supported ( ) ) { return ; } // NOTE: override this methods if following standard compliant SQL //       does not work for your driver. // Enclose the column name by the proper quotes if it's a reserved word. $ columnname = $ this -> get_manager ( ) -> generator -> getEncQuoted ( $ column -> name ) ; $ searchsql = $ this -> sql_like ( $ columnname , '?' ) ; $ searchparam = '%' . $ this -> sql_like_escape ( $ search ) . '%' ; $ sql = "UPDATE {" . $ table . "}
                         SET $columnname = REPLACE($columnname, ?, ?)
                       WHERE $searchsql" ; if ( $ column -> meta_type === 'X' ) { $ this -> execute ( $ sql , array ( $ search , $ replace , $ searchparam ) ) ; } else if ( $ column -> meta_type === 'C' ) { if ( core_text :: strlen ( $ search ) < core_text :: strlen ( $ replace ) ) { $ colsize = $ column -> max_length ; $ sql = "UPDATE {" . $ table . "}
                         SET $columnname = " . $ this -> sql_substr ( "REPLACE(" . $ columnname . ", ?, ?)" , 1 , $ colsize ) . "
                       WHERE $searchsql" ; } $ this -> execute ( $ sql , array ( $ search , $ replace , $ searchparam ) ) ; } }
docstring: Replace given text in all rows of column.
  
  @since Moodle 2.6.1
  @param string $table name of the table
  @param database_column_info $column
  @param string $search
  @param string $replace
docstring_tokens: Replace given text in all rows of column .