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The creation of the primary key does not work. We will have to flag externally stored columns and copy the externally stored part from the old table. row_build_index_for_mysql(): Rename to row_merge_build_indexes(). Move from row0mysql.c to row0merge.c. Remove private declarations from row0merge.h. Make many functions static in row0merge.c. cmp_rec_rec_simple(): A new comparison function. dict_index_get_min_size(): New function. OS_FILE_FROM_FD(fd): A macro for converting from int to os_file_t. rec_convert_dtuple_to_rec_comp(): Make the interface lower-level. rec_get_converted_size_comp(): Return also extra_size. UT_SORT_FUNCTION_BODY(): Remove reference to an obsolete test program. row_rec_to_index_entry_low(): New function. row0merge.c: Implement merge sort based on file streams instead of fixed-size blocks. Sort the small blocks as arrays of dfield_t*, because it is faster than invoking rec_get_offsets() for every comparison.
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/**********************************************************************
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Sort utility
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(c) 1995 Innobase Oy
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Created 11/9/1995 Heikki Tuuri
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***********************************************************************/
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#ifndef ut0sort_h
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#define ut0sort_h
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#include "univ.i"
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/* This module gives a macro definition of the body of
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a standard sort function for an array of elements of any
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type. The comparison function is given as a parameter to
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the macro. The sort algorithm is mergesort which has logarithmic
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worst case.
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*/
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/***********************************************************************
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This macro expands to the body of a standard sort function.
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The sort function uses mergesort and must be defined separately
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for each type of array.
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Also the comparison function has to be defined individually
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for each array cell type. SORT_FUN is the sort function name.
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The function takes the array to be sorted (ARR),
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the array of auxiliary space (AUX_ARR) of same size,
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and the low (LOW), inclusive, and high (HIGH), noninclusive,
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limits for the sort interval as arguments.
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CMP_FUN is the comparison function name. It takes as arguments
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two elements from the array and returns 1, if the first is bigger,
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0 if equal, and -1 if the second bigger. */
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#define UT_SORT_FUNCTION_BODY(SORT_FUN, ARR, AUX_ARR, LOW, HIGH, CMP_FUN)\
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{\
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ulint ut_sort_mid77;\
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ulint ut_sort_i77;\
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ulint ut_sort_low77;\
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ulint ut_sort_high77;\
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\
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ut_ad((LOW) < (HIGH));\
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ut_ad(ARR);\
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ut_ad(AUX_ARR);\
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\
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if ((LOW) == (HIGH) - 1) {\
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return;\
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} else if ((LOW) == (HIGH) - 2) {\
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if (CMP_FUN((ARR)[LOW], (ARR)[(HIGH) - 1]) > 0) {\
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(AUX_ARR)[LOW] = (ARR)[LOW];\
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(ARR)[LOW] = (ARR)[(HIGH) - 1];\
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(ARR)[(HIGH) - 1] = (AUX_ARR)[LOW];\
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}\
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return;\
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}\
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\
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ut_sort_mid77 = ((LOW) + (HIGH)) / 2;\
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\
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SORT_FUN((ARR), (AUX_ARR), (LOW), ut_sort_mid77);\
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SORT_FUN((ARR), (AUX_ARR), ut_sort_mid77, (HIGH));\
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\
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ut_sort_low77 = (LOW);\
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ut_sort_high77 = ut_sort_mid77;\
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\
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for (ut_sort_i77 = (LOW); ut_sort_i77 < (HIGH); ut_sort_i77++) {\
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\
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if (ut_sort_low77 >= ut_sort_mid77) {\
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(AUX_ARR)[ut_sort_i77] = (ARR)[ut_sort_high77];\
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ut_sort_high77++;\
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} else if (ut_sort_high77 >= (HIGH)) {\
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(AUX_ARR)[ut_sort_i77] = (ARR)[ut_sort_low77];\
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ut_sort_low77++;\
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} else if (CMP_FUN((ARR)[ut_sort_low77],\
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(ARR)[ut_sort_high77]) > 0) {\
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(AUX_ARR)[ut_sort_i77] = (ARR)[ut_sort_high77];\
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ut_sort_high77++;\
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} else {\
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(AUX_ARR)[ut_sort_i77] = (ARR)[ut_sort_low77];\
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ut_sort_low77++;\
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}\
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}\
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\
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for (ut_sort_i77 = (LOW); ut_sort_i77 < (HIGH); ut_sort_i77++) {\
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(ARR)[ut_sort_i77] = (AUX_ARR)[ut_sort_i77];\
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}\
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}\
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#endif
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