sql_lex.cc File Reference

#include "sql/sql_lex.h"
#include <algorithm>
#include <climits>
#include <cstdlib>
#include <initializer_list>
#include <memory>
#include "field_types.h"
#include "m_string.h"
#include "my_alloc.h"
#include "my_dbug.h"
#include "mysql/mysql_lex_string.h"
#include "mysql/service_mysql_alloc.h"
#include "mysql/strings/collations.h"
#include "mysql/strings/m_ctype.h"
#include "mysql_version.h"
#include "mysqld_error.h"
#include "prealloced_array.h"
#include "sql/current_thd.h"
#include "sql/derror.h"
#include "sql/item_func.h"
#include "sql/item_subselect.h"
#include "sql/lex_symbol.h"
#include "sql/lexer_yystype.h"
#include "sql/mysqld.h"
#include "sql/nested_join.h"
#include "sql/opt_hints.h"
#include "sql/parse_location.h"
#include "sql/parse_tree_nodes.h"
#include "sql/protocol.h"
#include "sql/select_lex_visitor.h"
#include "sql/sp_head.h"
#include "sql/sql_admin.h"
#include "sql/sql_base.h"
#include "sql/sql_class.h"
#include "sql/sql_cmd.h"
#include "sql/sql_digest_stream.h"
#include "sql/sql_error.h"
#include "sql/sql_insert.h"
#include "sql/sql_lex_hash.h"
#include "sql/sql_lex_hints.h"
#include "sql/sql_optimizer.h"
#include "sql/sql_parse.h"
#include "sql/sql_plugin.h"
#include "sql/sql_profile.h"
#include "sql/sql_show.h"
#include "sql/sql_table.h"
#include "sql/sql_yacc.h"
#include "sql/system_variables.h"
#include "sql/table_function.h"
#include "sql/window.h"
#include "sql_update.h"
#include "string_with_len.h"
#include "template_utils.h"

Macros
#define	UNSAFE(a, b, c)

Typedefs
typedef Prealloced_array< Table_ref *, 8 >	Table_array

Functions
int	my_hint_parser_parse (THD *thd, Hint_scanner *scanner, PT_hint_list **ret)
static int	lex_one_token (Lexer_yystype *yylval, THD *thd)
void	lex_free ()
bool	lex_start (THD *thd)
	Call lex_start() before every query that is to be prepared and executed. More...
void	lex_end (LEX *lex)
	Call this function after preparation and execution of a query. More...
static bool	consume_optimizer_hints (Lex_input_stream *lip)
static int	find_keyword (Lex_input_stream *lip, uint len, bool function)
bool	is_keyword (const char *name, size_t len)
bool	is_lex_native_function (const LEX_STRING *name)
	Check if name is a sql function. More...
static LEX_STRING	get_token (Lex_input_stream *lip, uint skip, uint length)
static LEX_STRING	get_quoted_token (Lex_input_stream *lip, uint skip, uint length, char quote)
static char *	get_text (Lex_input_stream *lip, int pre_skip, int post_skip)
static LEX_CSTRING	get_dollar_quoted_text (Lex_input_stream *lip, int tag_len)
	Get the text literal between dollar quotes. More...
static uint	int_token (const char *str, uint length)
static bool	consume_comment (Lex_input_stream *lip, int remaining_recursions_permitted)
	Given a stream that is advanced to the first contained character in an open comment, consume the comment. More...
int	my_sql_parser_lex (MY_SQL_PARSER_STYPE *yacc_yylval, POS *yylloc, THD *thd)
	yylex() function implementation for the main parser More...
void	trim_whitespace (const CHARSET_INFO *cs, LEX_STRING *str)
void	print_derived_column_names (const THD *thd, String *str, const Create_col_name_list *column_names)
	Prints into 'str' a comma-separated list of column names, enclosed in parenthesis. More...
void	print_set_operation (const THD *thd, Query_term *op, String *str, int level, enum_query_type query_type)
static void	print_table_array (const THD *thd, String *str, const Table_array &tables, enum_query_type query_type)
static void	print_join (const THD *thd, String *str, mem_root_deque< Table_ref * > *tables, enum_query_type query_type)
	Print joins from the FROM clause. More...
bool	db_is_default_db (const char *db, size_t db_len, const THD *thd)
static enum_walk	get_walk_flags (const Select_lex_visitor *visitor)
bool	walk_item (Item *item, Select_lex_visitor *visitor)
bool	accept_for_order (SQL_I_List< ORDER > orders, Select_lex_visitor *visitor)
bool	accept_for_join (mem_root_deque< Table_ref * > *tables, Select_lex_visitor *visitor)
bool	accept_table (Table_ref *t, Select_lex_visitor *visitor)
static enum_explain_type	setop2result (Query_term *qt)
static bool	get_optimizable_join_conditions (THD *thd, mem_root_deque< Table_ref * > &join_list)
	Helper function which handles the "ON conditions" part of Query_block::get_optimizable_conditions(). More...
static bool	walk_join_condition (mem_root_deque< Table_ref * > *tables, Item_processor processor, enum_walk walk, uchar *arg)
	Apply walk() processor to join conditions. More...
static void	unsafe_mixed_statement (LEX::enum_stmt_accessed_table a, LEX::enum_stmt_accessed_table b, uint condition)
void	binlog_unsafe_map_init ()
void	get_select_options_str (ulonglong options, std::string *str)

Variables
const LEX_STRING	null_lex_str = {nullptr, 0}
	LEX_STRING constant for null-string to be used in parser and other places. More...
const char *	index_hint_type_name []
static const char *	long_str = "2147483647"
static const uint	long_len = 10
static const char *	signed_long_str = "-2147483648"
static const char *	longlong_str = "9223372036854775807"
static const uint	longlong_len = 19
static const char *	signed_longlong_str = "-9223372036854775808"
static const uint	signed_longlong_len = 19
static const char *	unsigned_longlong_str = "18446744073709551615"
static const uint	unsigned_longlong_len = 20
uint	binlog_unsafe_map [256]

Macro Definition Documentation

UNSAFE

#define UNSAFE	(		a,
			b,
			c
	)

Value:

  {                                                      \
    DBUG_PRINT("unsafe_mixed_statement",                 \
               ("SETTING BASE VALUES: %s, %s, %02X\n",   \
                LEX::stmt_accessed_table_string(a),      \
                LEX::stmt_accessed_table_string(b), c)); \
    unsafe_mixed_statement(a, b, c);                     \
  }

Typedef Documentation

Table_array

typedef Prealloced_array<Table_ref *, 8> Table_array

Function Documentation

accept_for_join()

bool accept_for_join	(	mem_root_deque< Table_ref * > *	tables,
		Select_lex_visitor *	visitor
	)

accept_for_order()

bool accept_for_order	(	SQL_I_List< ORDER >	orders,
		Select_lex_visitor *	visitor
	)

accept_table()

bool accept_table	(	Table_ref *	t,
		Select_lex_visitor *	visitor
	)

consume_comment()

static bool consume_comment ( Lex_input_stream *  lip, int  remaining_recursions_permitted  )

static

Given a stream that is advanced to the first contained character in an open comment, consume the comment.

Optionally, if we are allowed, recurse so that we understand comments within this current comment.

At this level, we do not support version-condition comments. We might have been called with having just passed one in the stream, though. In that case, we probably want to tolerate mundane comments inside. Thus, the case for recursion.

Return values

Whether

EOF reached before comment is closed.

consume_optimizer_hints()

static bool consume_optimizer_hints ( Lex_input_stream *  lip )

static

find_keyword()

static int find_keyword ( Lex_input_stream *  lip, uint  len, bool  function  )

static

get_dollar_quoted_text()

static LEX_CSTRING get_dollar_quoted_text ( Lex_input_stream *  lip, int  tag_len  )

static

Get the text literal between dollar quotes.

A dollar quote is of the form $tag$, where tag is zero or more characters. The same characters that are permitted for unquoted identifiers, except dollar, may be used for the tag. That is, basic ASCII letters, digits 0-9, underscore, and any multibyte UTF8 characters.

Parameters

lip	The input stream. When called, the current position is right after the initial dollar character
tag_len	The length of the tag

Returns

The text literal without dollar quotes

get_optimizable_join_conditions()

static bool get_optimizable_join_conditions ( THD *  thd, mem_root_deque< Table_ref * > &  join_list  )

static

Helper function which handles the "ON conditions" part of Query_block::get_optimizable_conditions().

Returns

true if OOM

get_quoted_token()

static LEX_STRING get_quoted_token ( Lex_input_stream *  lip, uint  skip, uint  length, char  quote  )

static

get_select_options_str()

void get_select_options_str	(	ulonglong	options,
		std::string *	str
	)

get_text()

static char * get_text ( Lex_input_stream *  lip, int  pre_skip, int  post_skip  )

static

get_token()

static LEX_STRING get_token ( Lex_input_stream *  lip, uint  skip, uint  length  )

static

get_walk_flags()

static enum_walk get_walk_flags ( const Select_lex_visitor *  visitor )

static

int_token()

static uint int_token ( const char *  str, uint  length  )

inlinestatic

lex_one_token()

static int lex_one_token ( Lexer_yystype *  yylval, THD *  thd  )

static

my_hint_parser_parse()

int my_hint_parser_parse	(	THD *	thd,
		Hint_scanner *	scanner,
		PT_hint_list **	ret
	)

print_join()

static void print_join ( const THD *  thd, String *  str, mem_root_deque< Table_ref * > *  tables, enum_query_type  query_type  )

static

Print joins from the FROM clause.

Parameters

thd	thread handler
str	string where table should be printed
tables	list of tables in join
query_type	type of the query is being generated

print_set_operation()

void print_set_operation	(	const THD *	thd,
		Query_term *	op,
		String *	str,
		int	level,
		enum_query_type	query_type
	)

print_table_array()

static void print_table_array ( const THD *  thd, String *  str, const Table_array &  tables, enum_query_type  query_type  )

static

setop2result()

static enum_explain_type setop2result ( Query_term *  qt )

static

unsafe_mixed_statement()

static void unsafe_mixed_statement ( LEX::enum_stmt_accessed_table  a, LEX::enum_stmt_accessed_table  b, uint  condition  )

static

walk_item()

bool walk_item	(	Item *	item,
		Select_lex_visitor *	visitor
	)

walk_join_condition()

static bool walk_join_condition ( mem_root_deque< Table_ref * > *  tables, Item_processor  processor, enum_walk  walk, uchar *  arg  )

static

Apply walk() processor to join conditions.

JOINs may be nested. Walk nested joins recursively to apply the processor.

Variable Documentation

long_len

const uint long_len = 10

static

long_str

const char* long_str = "2147483647"

static

longlong_len

const uint longlong_len = 19

static

longlong_str

const char* longlong_str = "9223372036854775807"

static

signed_long_str

const char* signed_long_str = "-2147483648"

static

signed_longlong_len

const uint signed_longlong_len = 19

static

signed_longlong_str

const char* signed_longlong_str = "-9223372036854775808"

static

unsigned_longlong_len

const uint unsigned_longlong_len = 20

static

unsigned_longlong_str

const char* unsigned_longlong_str = "18446744073709551615"

static