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by brian
clean slate |
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/******************************************************
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SQL evaluator: evaluates simple data structures, like expressions, in
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a query graph
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(c) 1997 Innobase Oy
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Created 12/29/1997 Heikki Tuuri
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*******************************************************/
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#ifndef eval0eval_h
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#define eval0eval_h
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#include "univ.i" |
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#include "que0types.h" |
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#include "pars0sym.h" |
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#include "pars0pars.h" |
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/*********************************************************************
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Free the buffer from global dynamic memory for a value of a que_node,
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if it has been allocated in the above function. The freeing for pushed
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column values is done in sel_col_prefetch_buf_free. */
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void
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eval_node_free_val_buf( |
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/*===================*/
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que_node_t* node); /* in: query graph node */ |
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/*********************************************************************
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Evaluates a symbol table symbol. */
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UNIV_INLINE
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void
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eval_sym( |
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/*=====*/
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sym_node_t* sym_node); /* in: symbol table node */ |
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/*********************************************************************
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Evaluates an expression. */
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UNIV_INLINE
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void
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eval_exp( |
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/*=====*/
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que_node_t* exp_node); /* in: expression */ |
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/*********************************************************************
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Sets an integer value as the value of an expression node. */
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UNIV_INLINE
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void
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eval_node_set_int_val( |
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/*==================*/
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que_node_t* node, /* in: expression node */ |
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lint val); /* in: value to set */ |
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/*********************************************************************
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Gets an integer value from an expression node. */
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UNIV_INLINE
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lint
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eval_node_get_int_val( |
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/*==================*/
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/* out: integer value */
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que_node_t* node); /* in: expression node */ |
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/*********************************************************************
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Copies a binary string value as the value of a query graph node. Allocates a
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new buffer if necessary. */
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UNIV_INLINE
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void
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eval_node_copy_and_alloc_val( |
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/*=========================*/
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que_node_t* node, /* in: query graph node */ |
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byte* str, /* in: binary string */ |
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ulint len); /* in: string length or UNIV_SQL_NULL */ |
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/*********************************************************************
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Copies a query node value to another node. */
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UNIV_INLINE
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void
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eval_node_copy_val( |
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/*===============*/
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que_node_t* node1, /* in: node to copy to */ |
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que_node_t* node2); /* in: node to copy from */ |
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/*********************************************************************
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Gets a iboolean value from a query node. */
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UNIV_INLINE
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ibool
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eval_node_get_ibool_val( |
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/*====================*/
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/* out: iboolean value */
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que_node_t* node); /* in: query graph node */ |
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/*********************************************************************
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Evaluates a comparison node. */
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ibool
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eval_cmp( |
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/*=====*/
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/* out: the result of the comparison */
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func_node_t* cmp_node); /* in: comparison node */ |
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#ifndef UNIV_NONINL
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#include "eval0eval.ic" |
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#endif
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#endif
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