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Diffstat (limited to 'storage/innobase/include/data0data.ic')
| -rw-r--r-- | storage/innobase/include/data0data.ic | 433 |
1 files changed, 433 insertions, 0 deletions
diff --git a/storage/innobase/include/data0data.ic b/storage/innobase/include/data0data.ic new file mode 100644 index 00000000000..0769372e16f --- /dev/null +++ b/storage/innobase/include/data0data.ic @@ -0,0 +1,433 @@ +/************************************************************************ +SQL data field and tuple + +(c) 1994-1996 Innobase Oy + +Created 5/30/1994 Heikki Tuuri +*************************************************************************/ + +#include "mem0mem.h" +#include "ut0rnd.h" + +extern byte data_error; + +/************************************************************************* +Gets pointer to the type struct of SQL data field. */ +UNIV_INLINE +dtype_t* +dfield_get_type( +/*============*/ + /* out: pointer to the type struct */ + dfield_t* field) /* in: SQL data field */ +{ + ut_ad(field); + + return(&(field->type)); +} + +/************************************************************************* +Sets the type struct of SQL data field. */ +UNIV_INLINE +void +dfield_set_type( +/*============*/ + dfield_t* field, /* in: SQL data field */ + dtype_t* type) /* in: pointer to data type struct */ +{ + ut_ad(field && type); + + field->type = *type; +} + +/************************************************************************* +Gets pointer to the data in a field. */ +UNIV_INLINE +void* +dfield_get_data( +/*============*/ + /* out: pointer to data */ + dfield_t* field) /* in: field */ +{ + ut_ad(field); + ut_ad((field->len == UNIV_SQL_NULL) + || (field->data != &data_error)); + + return(field->data); +} + +/************************************************************************* +Gets length of field data. */ +UNIV_INLINE +ulint +dfield_get_len( +/*===========*/ + /* out: length of data; UNIV_SQL_NULL if + SQL null data */ + dfield_t* field) /* in: field */ +{ + ut_ad(field); + ut_ad((field->len == UNIV_SQL_NULL) + || (field->data != &data_error)); + + return(field->len); +} + +/************************************************************************* +Sets length in a field. */ +UNIV_INLINE +void +dfield_set_len( +/*===========*/ + dfield_t* field, /* in: field */ + ulint len) /* in: length or UNIV_SQL_NULL */ +{ + ut_ad(field); + + field->len = len; +} + +/************************************************************************* +Sets pointer to the data and length in a field. */ +UNIV_INLINE +void +dfield_set_data( +/*============*/ + dfield_t* field, /* in: field */ + const void* data, /* in: data */ + ulint len) /* in: length or UNIV_SQL_NULL */ +{ + ut_ad(field); + + field->data = (void*) data; + field->len = len; +} + +/************************************************************************* +Copies the data and len fields. */ +UNIV_INLINE +void +dfield_copy_data( +/*=============*/ + dfield_t* field1, /* in: field to copy to */ + dfield_t* field2) /* in: field to copy from */ +{ + ut_ad(field1 && field2); + + field1->data = field2->data; + field1->len = field2->len; +} + +/************************************************************************* +Copies a data field to another. */ +UNIV_INLINE +void +dfield_copy( +/*========*/ + dfield_t* field1, /* in: field to copy to */ + dfield_t* field2) /* in: field to copy from */ +{ + *field1 = *field2; +} + +/************************************************************************* +Tests if data length and content is equal for two dfields. */ +UNIV_INLINE +ibool +dfield_datas_are_binary_equal( +/*==========================*/ + /* out: TRUE if equal */ + dfield_t* field1, /* in: field */ + dfield_t* field2) /* in: field */ +{ + ulint len; + + len = field1->len; + + if ((len != field2->len) + || ((len != UNIV_SQL_NULL) + && (0 != ut_memcmp(field1->data, field2->data, len)))) { + + return(FALSE); + } + + return(TRUE); +} + +/************************************************************************* +Gets info bits in a data tuple. */ +UNIV_INLINE +ulint +dtuple_get_info_bits( +/*=================*/ + /* out: info bits */ + dtuple_t* tuple) /* in: tuple */ +{ + ut_ad(tuple); + + return(tuple->info_bits); +} + +/************************************************************************* +Sets info bits in a data tuple. */ +UNIV_INLINE +void +dtuple_set_info_bits( +/*=================*/ + dtuple_t* tuple, /* in: tuple */ + ulint info_bits) /* in: info bits */ +{ + ut_ad(tuple); + + tuple->info_bits = info_bits; +} + +/************************************************************************* +Gets number of fields used in record comparisons. */ +UNIV_INLINE +ulint +dtuple_get_n_fields_cmp( +/*====================*/ + /* out: number of fields used in comparisons + in rem0cmp.* */ + dtuple_t* tuple) /* in: tuple */ +{ + ut_ad(tuple); + + return(tuple->n_fields_cmp); +} + +/************************************************************************* +Sets number of fields used in record comparisons. */ +UNIV_INLINE +void +dtuple_set_n_fields_cmp( +/*====================*/ + dtuple_t* tuple, /* in: tuple */ + ulint n_fields_cmp) /* in: number of fields used in + comparisons in rem0cmp.* */ +{ + ut_ad(tuple); + ut_ad(n_fields_cmp <= tuple->n_fields); + + tuple->n_fields_cmp = n_fields_cmp; +} + +/************************************************************************* +Gets number of fields in a data tuple. */ +UNIV_INLINE +ulint +dtuple_get_n_fields( +/*================*/ + /* out: number of fields */ + dtuple_t* tuple) /* in: tuple */ +{ + ut_ad(tuple); + + return(tuple->n_fields); +} + +/************************************************************************* +Gets nth field of a tuple. */ +UNIV_INLINE +dfield_t* +dtuple_get_nth_field( +/*=================*/ + /* out: nth field */ + dtuple_t* tuple, /* in: tuple */ + ulint n) /* in: index of field */ +{ + ut_ad(tuple); + ut_ad(n < tuple->n_fields); + + return(tuple->fields + n); +} + +/************************************************************** +Creates a data tuple to a memory heap. The default value for number +of fields used in record comparisons for this tuple is n_fields. */ +UNIV_INLINE +dtuple_t* +dtuple_create( +/*==========*/ + /* out, own: created tuple */ + mem_heap_t* heap, /* in: memory heap where the tuple + is created */ + ulint n_fields) /* in: number of fields */ +{ + dtuple_t* tuple; + + ut_ad(heap); + + tuple = (dtuple_t*) mem_heap_alloc(heap, sizeof(dtuple_t) + + n_fields * sizeof(dfield_t)); + tuple->info_bits = 0; + tuple->n_fields = n_fields; + tuple->n_fields_cmp = n_fields; + tuple->fields = (dfield_t*)(((byte*)tuple) + sizeof(dtuple_t)); + +#ifdef UNIV_DEBUG + tuple->magic_n = DATA_TUPLE_MAGIC_N; + + { /* In the debug version, initialize fields to an error value */ + ulint i; + + for (i = 0; i < n_fields; i++) { + (tuple->fields + i)->data = &data_error; + dfield_get_type(tuple->fields + i)->mtype = DATA_ERROR; + } + } +#endif + return(tuple); +} + +/************************************************************** +The following function returns the sum of data lengths of a tuple. The space +occupied by the field structs or the tuple struct is not counted. Neither +is possible space in externally stored parts of the field. */ +UNIV_INLINE +ulint +dtuple_get_data_size( +/*=================*/ + /* out: sum of data lengths */ + dtuple_t* tuple) /* in: typed data tuple */ +{ + dfield_t* field; + ulint n_fields; + ulint len; + ulint i; + ulint sum = 0; + + ut_ad(tuple); + ut_ad(dtuple_check_typed(tuple)); + ut_ad(tuple->magic_n == DATA_TUPLE_MAGIC_N); + + n_fields = tuple->n_fields; + + for (i = 0; i < n_fields; i++) { + field = dtuple_get_nth_field(tuple, i); + len = dfield_get_len(field); + + if (len == UNIV_SQL_NULL) { + len = dtype_get_sql_null_size(dfield_get_type(field)); + } + + sum += len; + } + + return(sum); +} + +/*********************************************************************** +Sets types of fields binary in a tuple. */ +UNIV_INLINE +void +dtuple_set_types_binary( +/*====================*/ + dtuple_t* tuple, /* in: data tuple */ + ulint n) /* in: number of fields to set */ +{ + dtype_t* dfield_type; + ulint i; + + for (i = 0; i < n; i++) { + dfield_type = dfield_get_type(dtuple_get_nth_field(tuple, i)); + dtype_set(dfield_type, DATA_BINARY, 0, 0, 0); + } +} + +/**************************************************************** +Folds a prefix given as the number of fields of a tuple. */ +UNIV_INLINE +ulint +dtuple_fold( +/*========*/ + /* out: the folded value */ + dtuple_t* tuple, /* in: the tuple */ + ulint n_fields,/* in: number of complete fields to fold */ + ulint n_bytes,/* in: number of bytes to fold in an + incomplete last field */ + dulint tree_id)/* in: index tree id */ +{ + dfield_t* field; + ulint i; + byte* data; + ulint len; + ulint fold; + + ut_ad(tuple); + ut_ad(tuple->magic_n == DATA_TUPLE_MAGIC_N); + ut_ad(dtuple_check_typed(tuple)); + + fold = ut_fold_dulint(tree_id); + + for (i = 0; i < n_fields; i++) { + field = dtuple_get_nth_field(tuple, i); + + data = (byte*) dfield_get_data(field); + len = dfield_get_len(field); + + if (len != UNIV_SQL_NULL) { + fold = ut_fold_ulint_pair(fold, + ut_fold_binary(data, len)); + } + } + + if (n_bytes > 0) { + field = dtuple_get_nth_field(tuple, i); + + data = (byte*) dfield_get_data(field); + len = dfield_get_len(field); + + if (len != UNIV_SQL_NULL) { + if (len > n_bytes) { + len = n_bytes; + } + + fold = ut_fold_ulint_pair(fold, + ut_fold_binary(data, len)); + } + } + + return(fold); +} + +/************************************************************************** +Writes an SQL null field full of zeros. */ +UNIV_INLINE +void +data_write_sql_null( +/*================*/ + byte* data, /* in: pointer to a buffer of size len */ + ulint len) /* in: SQL null size in bytes */ +{ + ulint j; + + for (j = 0; j < len; j++) { + data[j] = '\0'; + } +} + +/************************************************************************** +Checks if a dtuple contains an SQL null value. */ +UNIV_INLINE +ibool +dtuple_contains_null( +/*=================*/ + /* out: TRUE if some field is SQL null */ + dtuple_t* tuple) /* in: dtuple */ +{ + ulint n; + ulint i; + + n = dtuple_get_n_fields(tuple); + + for (i = 0; i < n; i++) { + if (dfield_get_len(dtuple_get_nth_field(tuple, i)) + == UNIV_SQL_NULL) { + + return(TRUE); + } + } + + return(FALSE); +} |